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Effect of Al2O3nano sol content in Ni-Al2O3composite coating on intermetallic compound formation and properties of Mg/Al soldered joints 认领 引用 被引量：1
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作者 Yingzong Liu Yuanxing Li +2 位作者 Jinzhe Cui Zongtao Zhu Hui Chen 《Journal of Magnesium and Alloys》 SCIE EI CAS CSCD 2025年第4期1784-1798,共15页
Combining Mg and Al dissimilar metals further reduces structural weight,but the formation of intermetallic compounds(IMCs)affectsAl/Mg joint properties.To prevent IMCs,a Ni-Al2O3composite coating was pre-plated ... Combining Mg and Al dissimilar metals further reduces structural weight,but the formation of intermetallic compounds(IMCs)affectsAl/Mg joint properties.To prevent IMCs,a Ni-Al2O3composite coating was pre-plated on the Mg alloy substrate,and then Sn3.0Ag0.5Cu(SAC 305)solder was utilized to facilitate the joining of AZ31 Mg/6061 Al through ultrasonic-assisted soldering.We investigated the impactof Al2O3nano sol content in the coating on microstructure evolution,IMCs formation,and mechanical properties.Results indicated that theNi-Al2O3composite coating effectively suppressed the Mg-Sn reaction,thereby preventing the formation of Mg2Sn IMC and significantlyenhancing joint strength.In joints with a Ni-Al2O3composite coating containing 50 mL/L Al2O3nano sol,no Mg2Sn IMC was detectedafter 50 min of holding at 260℃,achieving a maximum shear strength of approximately 67.2 MPa.Increasing the Al2O3concentrationfurther expanded the soldering process window.For the joint with Ni-Al2O3(100 mL/L Al2O3nano sol)composite coating held at 260℃for 70 min,the coating was dissolved to a thickness of about 5.8μm,but no Mg2Sn IMC was observed.The Ni-based solid solution formednear the coating/solder interface was strengthened,leading to fractures occurring within the SAC solder,and the maximum shear strengthfurther increased to 73.9 MPa.The strengthening mechanism of the joints facilitated by using the Ni-Al2O3composite coating was revealedby comparing with pure Ni-assisted joints.Therefore,employing a Ni-Al2O3composite coating as a barrier layer represents a promisingstrategy for inhibiting IMC formation during the joining of dissimilar metals. 展开更多
关键词 Ni-Al2O3composite coating Ultrasonic-assisted soldering Mg2Sn IMC Shear strength
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Enhanced and Tunable Visible-Light and Near-Infrared Transmittance of VO2/ATO Composite Coatings for Smart Windows 认领 引用
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作者 HAN Tao YAN Yuqing +4 位作者 WANG Yanhang YANG Penghui LI Xianzi ZHANG Rui ZU Chengkui 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS CSCD 2025年第3期627-634,共8页
We synthesized tungsten-doped vanadium dioxide(W-VO2)particles via a one-step hydrothermal method,followed by their integration with antimony-doped tin oxide(ATO)nanoparticles to formulate a composite coating.Subse... We synthesized tungsten-doped vanadium dioxide(W-VO2)particles via a one-step hydrothermal method,followed by their integration with antimony-doped tin oxide(ATO)nanoparticles to formulate a composite coating.Subsequently,the VO2/ATO composite coating was fabricated through a spin-coating process.The impact of varying W-VO2 content and coating thickness on the performance of the composite coatings was systematically investigated by employing X-ray diffraction,particle size distribution analysis,spectrometry,and other pertinent test methodologies.Our findings revealed that an escalation in both W-VO2 content and coating thickness retained high transmittance in the near-infrared band at lower temperatures.However,as the temperature increased,a notable reduction in transmittance in the near-infrared band was observed,alongside a slight decrease in transmittance within the visible band.Remarkably,when the W-VO2 content reached 5%and the coating thickness was 1253 nm,the transmittance of the composite coating surpassed 80%.Furthermore,the heat insulation effect achieved a remarkable 10.0℃increase.Consequently,the synthesized composite coating demonstrates significant potential for smart glass applications,particularly in the realm of heat-insulating glass. 展开更多
关键词 VO2 ATO composite coating transmittance thermal insulation performance
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Preparation and oxidation property of ZrB_2-MoSi_2/SiC coating on carbon/carbon composites 认领 引用 被引量：19
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作者 张武装 曾毅 +2 位作者 GBOLOGAH Lemuel 熊翔 黄伯云 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2011年第7期1538-1544,共7页
To improve the oxidation resistance of carbon/carbon composites,ZrB2-MoSi2/SiC coating on the carbon/carbon substrate was prepared.The inner coating of SiC was prepared by pack cementation and the outer coating of ZrB... To improve the oxidation resistance of carbon/carbon composites,ZrB2-MoSi2/SiC coating on the carbon/carbon substrate was prepared.The inner coating of SiC was prepared by pack cementation and the outer coating of ZrB2-MoSi2 was prepared by slurry painting.The phase compositions and microstructures of the coating were characterized by XRD and SEM,respectively.The preparation and the high temperature oxidation property of the coated composites were investigated.The results show that the outer coating of carbon/carbon composites is composed of ZrB2,MoSi2 and SiC phases.The mass losses of the ZrB2-MoSi2/SiC coated samples with SiC nano-whiskers after 30 h and 10 h of oxidation at 1 273 K and 1 773 K were,respectively,5.3% and 3.0%.The ZrB2-MoSi2/SiC coated samples exhibit self-sealing performance and good oxidation resistance at high temperature. 展开更多
关键词 carbon/carbon composites ZrB2-MoSi2 SiC coating oxidation
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Anti-oxidation properties of ZrB_2 modified silicon-based multilayer coating for carbon/carbon composites at high temperatures 认领 引用 被引量：14
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作者 李贺军 姚西媛 +2 位作者 张雨雷 姚栋嘉 王少龙 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2013年第7期2094-2099,共6页
To improve the anti-oxidation ability of silicon-based coating for carbon/carbon （C/C） composites at high temperatures, a ZrB2 modified silicon-based multilayer oxidation protective coating was prepared by pack ceme... To improve the anti-oxidation ability of silicon-based coating for carbon/carbon （C/C） composites at high temperatures, a ZrB2 modified silicon-based multilayer oxidation protective coating was prepared by pack cementation. The phase composition, microstructure and oxidation resistance at 1773, 1873 and 1953 K in air were investigated. The prepared coating exhibits dense structure and good oxidation protective ability. Due to the formation of stable ZrSiO4-SiO2 compound, the coating can effectively protect C/C composites from oxidation at 1773 K for more than 550 h. The anti-oxidation performance decreases with the increase of oxidation temperature. The mass loss of coated sample is 2.44% after oxidation at 1953 K for 50 h, which is attributed to the decomposition of ZrSiO4 and the volatilization of SiO2 protection layer. 展开更多
关键词 C/C composites coating ZrB2 anti-oxidation properties
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SiC-MoSi_2/ZrO_2-MoSi_2 coating to protect C/C composites against oxidation 认领 引用 被引量：8
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作者 付前刚 张佳平 +2 位作者 张正中 李贺军 孙粲 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2013年第7期2113-2117,共5页
To improve the oxidation resistance of carbon/carbon （C/C） composites in air at high temperatures, a SiC- MoSi2/ZrO2-MoSi2 coating was prepared on the surface of C/C composites by pack cementation and slurry method.... To improve the oxidation resistance of carbon/carbon （C/C） composites in air at high temperatures, a SiC- MoSi2/ZrO2-MoSi2 coating was prepared on the surface of C/C composites by pack cementation and slurry method. The microstructures and phase compositions of the coated C/C composites were analyzed by scanning electron microscopy and X-ray diffraction, respectively. The result shows that the SiC-MoSi2/ZrO2-MoSi2 coating is dense and crack-free with a thickness of 250-300 μm. The preparation and the high temperature oxidation property of the coated composites were investigated. The as-received coating has excellent oxidation protection ability and can protect C/C composites from oxidation for 260 h at 1773 K in air. The excellent anti-oxidation performance of the coating is considered to come from the formation of ZrSiO4, which improves the stability of the coating at high temperatures. 展开更多
关键词 carbon/carbon composites SiC-MoSi2/ZrO2-MoSi2 coating oxidation resistance
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Tribological properties of nanostructured Al_2O_3-40%TiO_2 multiphase ceramic particles reinforced Ni-based alloy composite coatings 认领 引用 被引量：11
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作者 何龙 谭业发 +2 位作者 谭华 周春华 高立 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2013年第9期2618-2627,共10页
The Ni-based alloy composite coatings reinforced by nanostructured Al2O3-40%TiO2 multiphase ceramic particles were prepared on the surface of 7005 aluminum alloy by plasma spray technology. The microstructure and trib... The Ni-based alloy composite coatings reinforced by nanostructured Al2O3-40%TiO2 multiphase ceramic particles were prepared on the surface of 7005 aluminum alloy by plasma spray technology. The microstructure and tribological properties of the composite coatings were researched. The results show that the composite coatings mainly consist of γ-Ni, α-Al2O3, γ-Al2O3 and rutile-TiO2 etc, and exhibit lower friction coefficients and wear losses than the Ni-based alloy coatings at different loads and speeds. The composite coating bears low contact stress at 3 N and its wear mechanism is micro-cutting wear. As loads increase to 6-12 N, the contact stress is higher than the elastic limit stress of worn surface, and the wear mechanisms change into multi-plastic deformation wear, micro-brittle fracture wear and abrasive wear. With the increase of speeds, the contact temperature of worn surface increases. The composite coating experiences multi-plastic deformation wear, fatigue wear and adhesive wear. 展开更多
关键词 nanostructured A1203-TiO2 multiphase ceramic particles Ni-based alloy composite coating plasma spray friction wear
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C/SiC/MoSi_2-SiC-Si multilayer coating for oxidation protection of carbon/carbon composites 认领 引用 被引量：5
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作者 张雨雷 李贺军 +2 位作者 胡志雄 李克智 张磊磊 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2013年第7期2118-2122,共5页
C/SiC/MoSi2-SiC-Si oxidation protective multilayer coating for carbon/carbon （C/C） composites was prepared by pack cementation and slurry method. The microstructure, element distribution and phase composition of the... C/SiC/MoSi2-SiC-Si oxidation protective multilayer coating for carbon/carbon （C/C） composites was prepared by pack cementation and slurry method. The microstructure, element distribution and phase composition of the as-received coating were analyzed by scanning electron microscopy （SEM）, energy dispersive X-ray spectroscopy （EDS） and X-ray diffraction （XRD）. The results show that the multilayer coating was composed of MoSi2, SiC and Si. It could effectively protect C/C composites against oxidation for 200 h with the mass loss of 3.25% at 1873 K in static air. The mass loss of the coated C/C composites results from the volatilization of SiO2 and the formation of cracks and bubble holes in the coating. 展开更多
关键词 C/C composites C/SiC MoSi2 SiC multilayer coating oxidation
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Microstructure and properties of Al2O3-ZrO2-TiO2composite coatings prepared by plasma spraying 认领 引用 被引量：4
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作者 Peng-Yue Gao Yu-Duo Ma +5 位作者 Wen-Wei Sun Yong Yang Chen Zhang Yu-Hang Cui Yan-Wei Wang Yan-Chun Dong 《Rare Metals》 SCIE EI CAS CSCD 2021年第7期1825-1834,共10页
Al2O3-ZrO2-TiO2coatings were successfully prepared by plasma spraying Al2O3-ZrO2composite powders with and without TiO2addition.The effects of TiO2on the phase composition,microstructure and... Al2O3-ZrO2-TiO2coatings were successfully prepared by plasma spraying Al2O3-ZrO2composite powders with and without TiO2addition.The effects of TiO2on the phase composition,microstructure and properties of the Al2O3-ZrO2coating were studied.The results show that the Al2O3-ZrO2-TiO2composite powder was composed of t-ZrO2,a-Al2O3,m-ZrO2and rutile,while the Al2O3-ZrO2-TiO2composite coating consisted of t-ZrO2,a-Al2O3and c-Al2O3.The diffraction peaks of TiO2could not be detected in the Al2O3-ZrO2-TiO2coating even up to10 wt%TiO2addition.The reason may be that TiO2was dissolved in the amorphous phase or formed solid solution with c-Al2O3phase in the coating during cooling.Compared with the Al2O3-ZrO2coating,the as-prepared Al2O3-ZrO2-TiO2coating had denser microstructure,less microcracks and more amorphous phases.The density of the Al2O3-ZrO2-TiO2coating increased with the increase of TiO2content.The Al2O3-ZrO2-10 wt%TiO2coating had the most uniform and dense microstructure,possessed higher toughness,adhesive strength and wear resistance compared with the Al2O3-ZrO2coating,which was due to its lower porosity and more uniform microstructure. 展开更多
关键词 Al2O3-ZrO2 Composite coatings Plasma spraying TiO2
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Oxidation behavior of C/C composites with SiC/ZrSiO_4-SiO_2 coating 认领 引用 被引量：6
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作者 李杨 肖鹏 +2 位作者 李专 罗威 周伟 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2017年第2期397-405,共9页
A SiC/ZrSiO4？SiO2 （SZS） coating was successfully fabricated on the carbon/carbon （C/C） composites by pack cementation, slurry painting and sintering to improve the anti-oxidation property and thermal shock resist... A SiC/ZrSiO4？SiO2 （SZS） coating was successfully fabricated on the carbon/carbon （C/C） composites by pack cementation, slurry painting and sintering to improve the anti-oxidation property and thermal shock resistance. The anti-oxidation properties under different oxygen partial pressures （OPP） and thermal shock resistance of the SZS coating were investigated. The results show that the SZS coated sample under low OPP, corresponding to the ambient air, during isothermal oxidation was 0.54% in mass gain after 111 h oxidation at 1500 ° C and less than 0.03% in mass loss after 50 h oxidation in high OPP, corresponding to the air flow rate of 36 L/h. Additionally, the residual compressive strengths （RCS） of the SZS coated samples after oxidation for 50 h in high OPP and 80 h in low OPP remain about 70% and 72.5% of those of original C/C samples, respectively. Moreover, the mass loss of SZS coated samples subjected to the thermal cycle from 1500 ° C in high OPP to boiling water for 30 times was merely 1.61%. 展开更多
关键词 C/C composite SiC/ZrSiO4-SiO2 coating oxygen partial pressure anti-oxidation thermal shock residual compressive strength
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Preparation and tribological performance of electrodeposited Ni-TiB_2-Dy_2O_3 composite coatings 认领 引用 被引量：4
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作者 刘小珍 李昕 +1 位作者 余艾冰 黄玮珏 《Journal of Rare Earths》 SCIE EI CAS 2009年第3期480-485,共6页
TiB2 and Dy2O3 were used as codeposited particles in the preparation of Ni-TiB2-Dy2O3 composite coatings to improve its performance. Ni-TiB2-Dy2O3 composite coatings were prepared by electrodeposition method with a ni... TiB2 and Dy2O3 were used as codeposited particles in the preparation of Ni-TiB2-Dy2O3 composite coatings to improve its performance. Ni-TiB2-Dy2O3 composite coatings were prepared by electrodeposition method with a nickel cetyltrimethylammonium bromide and hexadecylpyridinium bromide solution containing TiB2 and Dy2O3 particles. The content of codeposited TiB2 and Dy2O3 in the composite coatings was controlled by adding TiB2 and Dy2O3 particles of different concentrations into the solution, respectively. The effects of TiB2 and Dy2O3 content on microhardness, wear mass loss and friction coefficients of composite coatings were investigated. The composite coatings were characterized by X-ray diffraction （XRD）, inductively coupled plasma-atomic emission spectrometer （ICP-AES） and scanning electron microscopy （SEM） techniques. Ni-TiBE-Dy2O3 composite coatings showed higher microhardness, lower wear mass loss and friction coefficient compared with those of the pure Ni coating and Ni-TiB2 composite coatings. The wear mass loss of Ni-TiB2-Dy2O3 composite coatings was 9 and 1.57 times lower than that of the pure Ni coating and Ni-TiB2 composite coatings, respectively. The friction coefficient of pure Ni coating, Ni-TiB2 and Ni-TiB2-Dy2O3 composite coatings were 0.723, 0.815 and 0.619, respectively. Ni-TiBE-Dy2O3 composite coatings displayed the least friction coefficient among the three coatings. Dy2O3 particles in composite coatings might serve as a solid lubricant between contact surfaces to decrease the friction coefficient and abate the wear of the composite coatings. The loading-bearing capacity and the wear-reducing effect of the Dy2O3 particles were closely related to the content of Dy2O3 particles in the composite coatings. 展开更多
关键词 electrodeposition composite coatings nickel TiB2 Dy2O3 friction and wear rare earths
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Laser Cladding Al-Si/Al_2O_3-TiO_2 Composite Coatings on AZ31B Magnesium Alloy 认领 引用 被引量：4
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作者 崔泽琴 YANG Hongwei +2 位作者 王文先 WU Hongliang XU Bingshe 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2012年第6期1042-1047,共6页
To improve the wear resistance and corrosion resistance of magnesium alloys, a 5 kW continuous wave CO2 laser was used to investigate the laser surface cladding on AZ31 B magnesium alloys with Al-Si/Al2O3-TiO2 composi... To improve the wear resistance and corrosion resistance of magnesium alloys, a 5 kW continuous wave CO2 laser was used to investigate the laser surface cladding on AZ31 B magnesium alloys with Al-Si/Al2O3-TiO2 composite powders. A detailed microstructure, chemical composition, and phase analysis of the composite coatings were studied by scanning electron microscopy （SEM）, energy dispersive spectroscopy （EDS）, and X-ray diffraction （XRD）. The laser cladding shows good metallurgical bonding with the substrate. The composite coatings are composed of Mgl7Al12, Al3Mg2, Mg2Si, Al2O3, and TiO2 phases. Compared to the average microhardness （50HV0.05） of the AZ3 1 B substrate, that of the composite coatings （230HV0.05） is improved significantly. The wear resistances of the surface layers were evaluated in detail. The results demonstrate that the wear resistances of the laser surface-modified samples are considerably improved compared to the substrate. It also show that the composite coatings exhibit better corrosion resistance than that of the substrate in 3.5wt% NaCI solution. 展开更多
关键词 AZ31B magnesium alloy laser cladding Al-Si/Al2O3-TiO2 composite coating wear resistance corrosion resistance
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Preparation of Al_2O_3/Au nano-laminated composite coatings and their oxidation resistance on stainless steel 认领 引用 被引量：3
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作者 高俊国 陆峰 +2 位作者 汤智慧 王长亮 何业东 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2012年第10期2491-2497,共7页
Al2O3/Au nano-laminated composite coatings were prepared by means of magnetron sputtering. The coating was compact and comprised of nano-laminated Al2O3 and Au layers. High temperature cyclic oxidation test was employ... Al2O3/Au nano-laminated composite coatings were prepared by means of magnetron sputtering. The coating was compact and comprised of nano-laminated Al2O3 and Au layers. High temperature cyclic oxidation test was employed to investigate the oxidation resistance of the composite coatings. The results revealed that the applied Al2O3/Au nano-laminated composite coatings improved the oxidation and spallation resistance of the stainless steel substrate significantly. The mechanism accounting for oxidation resistance was related with the suppression of inward oxygen diffusion and selective oxidation of Cr in the substrate. The mechanism accounting for spallation resistance was attributed to the relaxation of thermal stress by the nano-laminated structure. 展开更多
关键词 Al2O3/Au composite coatings magnetron sputtering oxidation resistance spallation resistance
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Electrodeposition and Characterization of Ni/Ti_3Si(Al)C_2 Composite Coatings 认领 引用 被引量：3
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作者 Ying Liang Mingyue Liu +2 位作者 Jixin Chen Xiaoxia Liu Yanchun Zhou 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2011年第11期1016-1024,共9页
Pure nickel and Ni/Ti3Si（AI）C2 composite coatings were prepared by electrodeposition method from an additive-free nickel Watt＇s bath and were characterized by X-ray diffraction, laser confocal microscopy and scanni... Pure nickel and Ni/Ti3Si（AI）C2 composite coatings were prepared by electrodeposition method from an additive-free nickel Watt＇s bath and were characterized by X-ray diffraction, laser confocal microscopy and scanning electron microscopy. The effect of current and Ti3Si（AI）C2 concentration in the solution on the composition, grain size, preferred orientation and surface morphology of the electrodeposited coatings were investigated. （200）-oriented Ni coatings could be deposited at high current （62.5 mA）, while （220）-oriented Ni coatings could be obtained at low current （25 mA）. However, the presence of Ti3Si（Al）C2 particles disturbed the surface texture of Ni crystallites in the composite coatings. Based on the simulated morphology and the observed microstructure, the mechanisms for the change of preferred orientation and crystallite shapes in the presence of Ti3Si（Al）C2 particles were discussed. Moreover, microhardness and friction properties of pure nickel and Ni/Ti3Si（Al）C2 composite coatings were also compared. 展开更多
关键词 Ni/TiaSi（Al）C2 composite coatings Electrodeposition Preferred orientation Microstructure Mechanical properties
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Comparative investigation of microstructure and high-temperature oxidation resistance of high-velocity oxy-fuel sprayed CoNiCrAlY/nano-Al2O3 composite coatings using satellited powders 认领 引用 被引量：7
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作者 Pejman Zamani Zia Valefi 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2023年第9期1779-1791,共13页
Satellited CoNiCrAlY–Al2O3feedstocks with 2wt%, 4wt%, and 6wt% oxide nanoparticles and pure CoNiCrAlY powder were deposited by the high-velocity oxy fuel process on an Inconel738 superalloy substrate. The oxida... Satellited CoNiCrAlY–Al2O3feedstocks with 2wt%, 4wt%, and 6wt% oxide nanoparticles and pure CoNiCrAlY powder were deposited by the high-velocity oxy fuel process on an Inconel738 superalloy substrate. The oxidation test was performed at 1050℃ for 5, 50, 100,150, 200, and 400 h. The microstructure and phase composition of powders and coatings were characterized by scanning electron microscopy and X-ray diffraction, respectively. The bonding strength of the coatings was also evaluated. The results proved that with the increase in the percentage of nanoparticles(from 2wt% to 6wt%), the amount of porosity(from 1vol% to 4.7vol%), unmelted particles, and roughness of the coatings(from 4.8 to 8.8 μm) increased, and the bonding strength decreased from 71 to 48 MPa. The thicknesses of the thermally grown oxide layer of pure and composite coatings(2wt%, 4wt%, and 6wt%) after 400 h oxidation were measured as 6.5, 5.5, 7.6, and 8.1 μm, respectively.The CoNiCrAlY–2wt% Al2O3coating showed the highest oxidation resistance due to the diffusion barrier effect of well-dispersed nanoparticles. The CoNiCrAlY–6wt% Al2O3coating had the lowest oxidation resistance due to its rough surface morphology and porous microstructure. 展开更多
关键词 MCrAlY coating CoNiCrAlY-Al2O3composite satellited feedstock microstructure high-temperature oxidation high-velocity oxy-fuel spraying
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Preparation and Properties of Y2O3-PF Alternating Coating on Polymer Matrix Composite Material Surface 认领 引用 被引量：2
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作者 Li Xuewu Zhang Jiahao +5 位作者 Feng Yuxi Liu Ming Shi Tian Wang Haidou Bai Yu Wang Yu 《稀有金属材料与工程》 SCIE EI CAS CSCD 北大核心 2024年第10期2777-2785,共9页
High-performance yttrium oxide-phenolic resin(Y2O3-PF)alternating coating was prepared on epoxy resin-based composite material using supersonic plasma spraying and dual-channel powder feeding technique.Y2O_(3... High-performance yttrium oxide-phenolic resin(Y2O3-PF)alternating coating was prepared on epoxy resin-based composite material using supersonic plasma spraying and dual-channel powder feeding technique.Y2O3-coated PF(Y2O3/PF)powder was firstly sprayed onto the substrate,forming a transition layer,and then the spherical Y2O3 powder and Y2O3/PF powder were alternately deposited to form the composite alternating coating.Results show that the alternating coating is mainly composed of deposited Y2O3/PF powder.The bonding strength between coating and substrate is as high as 26.48 MPa with the single-test maximum bonding strength of 28.10 MPa,and shear strength reaches 24.30 MPa.Additionally,the heat transfer effect caused by external Y2O3 particles gradually softens and even melts PF,thus effectively avoiding the damage of high temperature to molecular structure and thereby promoting the crosslinking and curing effects of resin during the deposition process.In the meantime,the unmelted Y2O3 powder results in the shot peening effect,which washes out and eliminates the powder particles with inferior deposition effect,ultimately improving the physical and chemical properties of the alternating coating. 展开更多
关键词 Y2O3-PF alternating coating epoxy resin composite material supersonic plasma spraying mechanical property
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Electrodeposition of Ni-Co-Fe_2O_3 composite coatings 认领 引用 被引量：1
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作者 马莉 周科朝 +1 位作者 李志友 魏秋平 《Journal of Central South University》 SCIE EI CAS 2010年第4期708-714,共7页
Ni-Co-Fe2O3 composite coatings were electrodeposited using cetyltrimethylammonium bromide(CTAB)-modified Watt's nickel bath with Fe2O3 particles dispersed in it.The effects of the plating parameters on the chemica... Ni-Co-Fe2O3 composite coatings were electrodeposited using cetyltrimethylammonium bromide(CTAB)-modified Watt's nickel bath with Fe2O3 particles dispersed in it.The effects of the plating parameters on the chemical composition,structural and morphological characteristics of the electrodeposited Ni-Co-Fe2O3 composite coatings were investigated by energy dispersive X-ray(EDS) spectroscopy,X-ray diffractometry(XRD) and scanning electron microscopy(SEM).The results reveal that Fe2O3 particles can be codeposited in the Ni-Co matrix.The codeposition of Fe2O3 particles with Ni-Co is favoured at high Fe2O3 particle concentration and medium stirring,and the deposition of Co is favoured at high concentration of CTAB.Moreover,the study of the textural perfection of the deposits reveals that the presence of particles leads to the worsening of the quality of the observed preferred orientation.Composites with high concentration of embedded particles exhibit a preferred crystal orientation of .The more the embedded Fe2O3 particles in the metallic matrix,the smaller the sizes of the crystallite for the composite deposits. 展开更多
关键词 electrodeposition Co-Ni alloy Fe2O3 particles composite coatings cetyltrimethylammonium bromide
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Parameter optimization for plasma-sprayed Al2O3p/Al composite coatings on AZ31 magnesium alloy 认领 引用 被引量：1
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作者 马凯 孙大千 +2 位作者 谷晓燕 李于朋 宣兆志 《China Welding》 EI CAS 2010年第1期15-20,共6页
Al2O3p/Al composite coatings were prepared on the surface of AZ31 magnesium alloy by plasma spraying technology with mixed powders of Al and Al2O3. An orthogonal test containing six factors and five levels was carried... Al2O3p/Al composite coatings were prepared on the surface of AZ31 magnesium alloy by plasma spraying technology with mixed powders of Al and Al2O3. An orthogonal test containing six factors and five levels was carried out to acquire the optimum technical parameters. Mierostruetures and properties of the composite coatings were studied. The results show that the coatings consist of Al2O3 particulates distributed uniformly and Al matrix, and the interface between the particulate and matrix is continuous, compact and clean. With increasing the mass fraction of Al2O3 in the mixed powders, the volume fraction of Al2O3 in the coatings iacreases. The Al2O3p/Al composite coating with 14% Al2O3 volume fraction has more compact microstrueture and more satisfactory properties. 展开更多
关键词 plasma spraying Al2O3p/Al composite coating microstructure parameter optimization
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Influence of current density on nano-Al_2O_3/Ni+Co bionic gradient composite coatings by electrodeposition 认领 引用 被引量：1
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作者 Yan Liu Luquan Ren +1 位作者 Sirong Yu Zhuwu Han 《Journal of University of Science and Technology Beijing》 2008年第5期633-637,共5页
Metal and nano-ceramic nanocomposite coatings were prepared on the gray cast iron surface by the electrodeposition method. The Ni-Co was used as the metal matrix,and nano-Al2O3 was chosen as the second-phase particula... Metal and nano-ceramic nanocomposite coatings were prepared on the gray cast iron surface by the electrodeposition method. The Ni-Co was used as the metal matrix,and nano-Al2O3 was chosen as the second-phase particulates. To avoid poor inter-face bonding and stress distribution,the gradient structure of biology materials was found as the model and therefore the gradient composite coating was prepared. The morphology of the composite coatings was flatter and the microstructure was denser than that of pure Ni-Co coatings. The composite coatings were prepared by different current densities,and the 2-D and 3-D morphologies of the surface coatings were observed. The result indicated that the 2-D structure became rougher and the 3-D surface density of apices became less when the current density was increased. The content of nanoparticulates reached a maximum value at the current density of 40mA·cm^-2,at the same time the properties including microhardness and wear-resistance were analyzed. The microhardness reached a maximum value and the wear volume was also less at the current density of 40mA·cm^-2. The reason was that nano-Al2O3 particles caused dispersive strengthening and grain refining. 展开更多
关键词 electrodeposition composite coating current density nano-Al2O3 microstructure mechanical properties
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Preparation of Al2O3/Y2O3 composite coating for deuterium permeation reduction 认领 引用 被引量：4
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作者 Weijing Wang Qinghe Yu +1 位作者 Xiaopeng Liu Zheng Lu 《Journal of Rare Earths》 SCIE EI CAS CSCD 2020年第11期1237-1242,I0004,共6页
A tritium permeation barrier is required in fusion blankets for the reduction of fuel loss and radiological hazard.In this study,an Al2O3/Y2O3 composite coating was prepared on 316 L stainless steel by radiofrequency ... A tritium permeation barrier is required in fusion blankets for the reduction of fuel loss and radiological hazard.In this study,an Al2O3/Y2O3 composite coating was prepared on 316 L stainless steel by radiofrequency magnetron sputtering in order to improve the tritium permeation resistance.The microstructure and the phase composition of the Al2O3/Y2O3 composite coating are observed by scanning electron microscopy,transmission electron microscopy and grazing incidence X-ray diffraction.Moreover,Auger electron spectroscopy was used to characterize the depth profiles of Al,Y and O elements.The results clearly indicate that the Al2O3/Y2O3 composite coating is fully dense and the total thickness is approximately 340 nm.The Al2O3/Y2O3 coating consists of an amorphous Al2O3 and the cubic Y2O3,in which Al,Y and O elements are homogeneously distributed in the vertical base direction.Furthermore,the deuterium permeation property of the Al2O3/Y2O3 composite coating was measured by the gas phase permeation method.The results show that the introduction of an interface and the existence of a tiny amount of micro-defects improve the deuterium resistance of the Al2O3/Y2O3 coating,and its deuterium permeation reduction factor is 536-750 at 873-973 K.Therefore,it is concluded that the Al2O3/Y2O3 co mposite coating as deuterium permeation barrier can significa ntly enha nce the deuterium permeation resistance property. 展开更多
关键词 Deuterium Permeation barrier Al2O3 coating Y2O3 coating Composite coating Rare earths
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Enhanced wetting and properties of carbon/carbon-Cu composites with Cr_3C_2 coatings by Cr-solution immersion method 认领 引用 被引量：5
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作者 Bo Kong Jinming Ru +1 位作者 Hongdi Zhang Tongxiang Fan 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2018年第3期458-465,共8页
A facile ammonium-dichromate solution immersion method was introduced to synthesize the copperwettable Cr3C2 coating on and inside the carbon-carbon （C/C） preform. The formation mechanism and the microstructures of ... A facile ammonium-dichromate solution immersion method was introduced to synthesize the copperwettable Cr3C2 coating on and inside the carbon-carbon （C/C） preform. The formation mechanism and the microstructures of the Cr3C2 coatings were studied. The contact angle between molten copper and the C/C decreased from 140°to 60°, demonstrating the significant improvement in the wettability. The Cr3C2- coated C/C-Cu composite with only 4.2% porosity and 3.69 gcm^-3 density was manufactured through copper infiltration. As a result, the thermal and electrical conductivity of the modified C/C-Cu increased significantly due to the infiltrated copper. Also the mechanical properties of the composites including both the flexural and compressive strengths were enhanced by over 100%. The modified C/C-Cu composite exhibited lower friction coefficients and wear rates for different load levels than those of the commercial C/Cu composite. These results demonstrate the potential of the modified C/C-Cu material for use in electrical contacts. 展开更多
关键词 Enhanced wetting and properties of carbon/carbon-Cu composites with Cr3C2 coatings by Cr-solution immersion method Cr Cu
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