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Effects of Yttrium Ion on Formation Mechanism of ZrO_2-Y_2O_3 Ceramic Coatings Formed by Plasma Electrolytic Oxidation on Al-12Si Alloy 认领 引用 被引量：4
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作者 王萍 LI Jianping +2 位作者 GUO Yongchun YANG Zhong WANG Jianli 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2014年第5期1044-1048,共5页
ZrO2-Y2O3 ceramic coating was produced by plasma electrolytic oxidation （PEO） on ZAlSil2Cu3Ni2 alloy. The microstructure and phase composition of the coating were investigated by SEM and XRD.： The results show that... ZrO2-Y2O3 ceramic coating was produced by plasma electrolytic oxidation （PEO） on ZAlSil2Cu3Ni2 alloy. The microstructure and phase composition of the coating were investigated by SEM and XRD.： The results show that adding an appropriate amount of yttrium ion can improve the growing rate of ceramic coating at different oxidation stages and decrease arc voltage. The thickness of ZrO2-Y2O3 coating is 16 μn thicker than that of ZrO2 coating and the maximum oxidation rate improves by 0.6 μm/min. In addition, the arc voltage decreases from 227 to 172 V. It can be seen that the rate of oxidation firstly increases to some extent and then decreases with the content of yttrium ion increasing. The growth rate reaches the maximum while the content of yttrium ion is 0.05 g-L-1The maximum thickness is 90 μm.Compared to ZrO2 coating, the micropores of ZrO2-Y2O3 coating are less and the ceramic layer is repeatedly deposited by ZrO2 and Y2O3 ceramic particles. Meanwhile, the binding force between coating and substrate is better and the coating is uniform and compact. The ceramic layer is mainly composed of c-Y0.15Zr0.85O1.93□0.07, m-ZrO2, α-Al2O3, ,γ-Al2O3 and Y2O3. It is indicated that ZrO2 has beert fully stabilized by yttrium ion through the formation of solid solution. 展开更多
关键词 Al-12Si alloys yttrium ion plasma electrolytic oxidation ZrO2-Y2O3 ceramic coating
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Interface characteristics of Al_2O_3-13%TiO_2 ceramic coatings prepared by laser cladding 认领 引用 被引量：4
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作者 高雪松 田宗军 +1 位作者 刘志东 沈理达 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2012年第10期2498-2503,共6页
Al2O3-13%TiO2 （mass fraction） coatings, prepared by laser cladding on nickel-based alloy, were heated using high frequency induction sources. The coating microstructure and the interface between bond coating and cer... Al2O3-13%TiO2 （mass fraction） coatings, prepared by laser cladding on nickel-based alloy, were heated using high frequency induction sources. The coating microstructure and the interface between bond coating and ceramic coating were characterized by SEM, XRD and EDS. The results show that two-layer substructure exists in the ceramic coating： one layer evolving from fully melted region where the sintered grains grow fully; another layer resembling the liquid-phase-sintered structure consisting of three-dimensional net where the melted Al2O3 particles are embedded in the TiO2-rich matrix. The mechanism of the two-layer substructure formation is also explained in terms of the melting and flattening behavior of the powders during laser cladding processing. The spinel compounds NiAl2O4 and acicular compounds Cr2O3 are discovered in the interface between bond coating and ceramic coating. It proves that the chemical reactions in the laser cladding process will significantly enhance the coating adhesion. 展开更多
关键词 ceramic coating nickel alloy laser cladding Al2O3-TiO2 high frequency induction
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Comparative study on corrosion behavior of plasma sprayed Al_2O_3, ZrO_2, Al_2O_3/ZrO_2 and ZrO_2/Al_2O_3 coatings 认领 引用 被引量：6
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作者 S.SATHISH M.GEETHA 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2016年第5期1336-1344,共9页
ZrO2, Al2O3, ZrO2/Al2O3 and Al2O3/ZrO2 coatings were fabricated on low carbon steel using atmospheric plasma spraying technique. The microstructure and phase composition of the as-sprayed coatings were examined by sca... ZrO2, Al2O3, ZrO2/Al2O3 and Al2O3/ZrO2 coatings were fabricated on low carbon steel using atmospheric plasma spraying technique. The microstructure and phase composition of the as-sprayed coatings were examined by scanning electron microscopy （SEM） and X-ray diffraction （XRD）, respectively. The polarization test, salt spray test and immersion test were used to investigate the corrosion behavior of the coatings in 3.5% NaCl solution. The results suggested that the bilayered Al2O3/ZrO2 coating exhibits superior corrosion resistance when compared with the other coatings. This is ascribed to the presence of very few interconnected pores and stable phases in the coating. 展开更多
关键词 bilayered coating Al2O3 ZrO2 atmospheric plasma spraying corrosion
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High temperature cyclic oxidation behavior of Y_2O_3-ZrO_2 thermal barrier coatings irradiated by high-intensity pulsed ion beam 认领 引用
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作者 王一奇 雷明凯 +1 位作者 AFSAR A M SONG J I 《Journal of Central South University》 SCIE EI CAS 2009年第1期13-17,共5页
The high-temperature oxidation resistance behavior of 7% （mass fraction） Y203-ZrO2 thermal barrier coatings （TBCs） irradiated by high-intensity pulsed ion beam （HIPIB） was investigated under the cyclic oxidation... The high-temperature oxidation resistance behavior of 7% （mass fraction） Y203-ZrO2 thermal barrier coatings （TBCs） irradiated by high-intensity pulsed ion beam （HIPIB） was investigated under the cyclic oxidation condition of 1 050 ℃ and 1 h. The columnar grains in the TBCs disappear after the HIPIB irradiation at ion current densities of 100-200 A/cm^2 and the irradiated surface becomes smooth and densified after remelting and ablation due to the HIPIB irradiation. The thermally grown oxide （TGO） layer thickness of the irradiated TBCs is smaller than that of the original TBCs. After 15 cycles, the mass gains of the original TBCs and those irradiated by ion current densities of 100 and 200 A/cm^2 due to the oxidation are found to be 0.8-0.9, 0.6-0.7, and 0.3-0.4 mg/cm^2, respectively. The inward diffusion of oxygen through the irradiated TBCs is significantly impeded by the densified top layer formed due to irradiation, which is the main reason for the improved overall oxidation resistance of the irradiated TBCs. 展开更多
关键词 Y2O3 ZrO2 thermal barrier coating high-intensity pulsed ion beam electron beam physical vapor deposition oxidation resistance cyclic oxidation
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Cr_2O_3 BASE CERAMIC COATING ON ALUMINUM ALLOYS FORMED BY CHEMICAL REACTIONS 认领 引用
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作者 T.M. Shao, X.H. Ma and W.Y. Yang The State key laboratory on tribology of Tsinghua University, Beijing 100084, China 《Acta Metallurgica Sinica(English Letters)》 EI CAS 1999年第5期979-982,共4页
A newly developed method is introduced for producing Cr 2O 3 base ceramic coating on aluminum alloys. On the basis of properly selecting base reactions, slurry is prepared and then applied onto the substrate surface. ... A newly developed method is introduced for producing Cr 2O 3 base ceramic coating on aluminum alloys. On the basis of properly selecting base reactions, slurry is prepared and then applied onto the substrate surface. By chemical reactions taken place in situ on the surface of aluminum alloy at relative low temperature, Cr 2O 3 base ceramic coating is formed. By means of scanning electron microscopy, the coating microstructure and the bonding mechanism are studied. X ray diffraction analysis is also used to investigate the chemical composition of the coating. The coating formation mechanism is further discussed. With a pin on disk tester, wear test is made to evaluate the wear performances of the coating. The results show that by applying the coating on aluminum alloy, the wear decreases 5 times in comparation to that without coating. 展开更多
关键词 Cr 2O 3 ceramic coating aluminum alloy chemical reaction
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RE-Al_2O_3 Ceramic Coating 认领 引用
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《China Rare Earth Information》 1999年第4期3-3,共1页
关键词 RE-Al2O3 Ceramic Coating Al
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(La0.2Ce0.2Nd0.2Sm0.2Eu0.2)PO4: A high-entropy rare-earth phosphate monazite ceramic with low thermal conductivity and good compatibility with Al2O3 认领 引用 被引量：28
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作者 Zifan Zhao Heng Chen +4 位作者 Huimin Xiang Fu-Zhi Dai Xiaohui Wang Zhijian Peng Yanchun Zhou 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2019年第12期2892-2896,共5页
Low thermal conductivity, matched thermal expansion coefficient and good compatibility are general requirements for the environmentalhermal barrier coatings(EBCs/TBCs) and interphases for Al2O3 f/Al2O3 composites. In ... Low thermal conductivity, matched thermal expansion coefficient and good compatibility are general requirements for the environmentalhermal barrier coatings(EBCs/TBCs) and interphases for Al2O3 f/Al2O3 composites. In this work, a novel high-entropy(HE) rare-earth phosphate monazite ceramic (La0.2Ce0.2Nd0.2Sm0.2Eu0.2)PO4 is designed and successfully synthesized. This new type of HE rare-earth phosphate monazite exhibits good chemical compatibility with Al2O3, without reaction with Al2O3 as high as 1600℃ in air. Moreover, the thermal expansion coefficient(TEC) of HE (La0.2Ce0.2Nd0.2Sm0.2Eu0.2)PO4(8.9 × 10^-6/℃ at 300–1000℃) is close to that of Al2O3. The thermal conductivity of HE (La0.2Ce0.2Nd0.2Sm0.2Eu0.2)PO4 at room temperature is as low as 2.08 W·m^-1·K^-1, which is about 42% lower than that of La PO4. Good chemical compatibility, close TEC to that of Al2O3, and low thermal conductivity indicate that HE (La0.2Ce0.2Nd0.2Sm0.2Eu0.2)PO4 is suitable as a candidate EBC/TBC material and an interphase for Al2O3 f/Al2O3 composites. 展开更多
关键词 (La0.2Ce0.2Nd0.2Sm0.2Eu0.2)PO4 High-entropy ceramics Al2O3f/Al2O3ceramic matrix composites Environmental barrier coating materials Interphase material Thermal expansion coefficient Thermal conductivity Solution synthesis Rare-earth phosphates Monazite
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阴极气膜微弧放电沉积ZrO_2-Y_2O_3陶瓷涂层 认领 引用 被引量：17
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作者 韩伟 何业东 +2 位作者 王德仁 薛润东 高唯 《稀有金属》 CAS 北大核心 2004年第4期622-626,共5页
采用阴极气膜微弧放电沉积制备ZrO2 Y2 O3陶瓷涂层 ,利用水溶液中阴极气膜放电产生的等离子体的能量 ,使在阴极表面形成的沉积物直接烧结为陶瓷涂层。研究了沉积涂层的影响因素和涂层形貌及结构。SEM ,EDS和XRD分析结果表明 ,获得的ZrO2... 采用阴极气膜微弧放电沉积制备ZrO2 Y2 O3陶瓷涂层 ,利用水溶液中阴极气膜放电产生的等离子体的能量 ,使在阴极表面形成的沉积物直接烧结为陶瓷涂层。研究了沉积涂层的影响因素和涂层形貌及结构。SEM ,EDS和XRD分析结果表明 ,获得的ZrO2 Y2 O3陶瓷涂层表面光滑、与基体结合致密、成分和相结构均匀 ,是一种由Y2 O3部分稳定的ZrO2 陶瓷涂层。通过测试阴极气膜放电过程中电流随时间的变化以及电位在两电极间分布 。 展开更多
关键词 阴极气膜微弧放电 等离子体电解沉积 ZrO2-Y2O3 陶瓷涂层
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Synthesis of ZrO_2-HfO_2-Y_2O_3-Sc_2O_3 Nano-Particles by Sol-Gel Technique in Aqueous Solution of Alcohol 认领 引用 被引量：1
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作者 甄强 陈瑞芳 +1 位作者 严凯 李榕 《Journal of Rare Earths》 SCIE EI CAS 2007年第2期199-203,共5页
Agglomeration-free nanosized ZrO2-HfO2-Y2O3-Sc2O3 composite powders were successfully synthesized by Sol-Gel technique in heated aqueous solution of alcohol, using analytically pure ZrOCl2 · 8H2O, HfOCl2·8H2... Agglomeration-free nanosized ZrO2-HfO2-Y2O3-Sc2O3 composite powders were successfully synthesized by Sol-Gel technique in heated aqueous solution of alcohol, using analytically pure ZrOCl2 · 8H2O, HfOCl2·8H2O, Y（NO3）3·6H2O, and Sc2O3 as raw materials. The effect of synthesis condition on the size and dispersity of the composite powders was investigated by means of XRD, TEM, and TG-DSC techniques. The results showed that well-dispersed predecessor of ZrO2-HfO2-Y2O3-Sc2O3 composite nanopowders could be obtained. The optional condition ： PEG6000 as dispersant was 1%, alcohol/H2O ratio was 5/1, metallic ion concentration in whole solution was 0.5 mol·L^-1 and the pH value of the solution was 12. After calcined at 620 ℃, the powder obtained was in uniform cubic structure, and its average particle size was about 13 nm, which was good for producing nanocrystalline solid electrolyte. 展开更多
关键词 ZrO2-HfO2-Y2O3-Sc2O3 composite nanopowders sol-gel aqueous solution of alcohol dispersibility rare earths
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硬脂酸络合法制备ZrO_2-Y_2O_3纳米粉 认领 引用 被引量：1
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作者 李样生 刘桂华 +2 位作者 李璠 傅春牛 李永绣 《稀土》 CAS 北大核心 2002年第6期17-20,共4页
以硬脂酸为络合、分散剂,与无机锆、钇盐络合,制备了ZrO2-Y2O3纳米粉。用TG、DTA、XRD、TEM等方法对制备过程进行了表征。600℃煅烧后可得到粒径约为40nm的ZrO2-Y2O3纳米粉,粒子呈球形,粒度随焙烧温度的升高而增大。表明采用该法可获得Z... 以硬脂酸为络合、分散剂,与无机锆、钇盐络合,制备了ZrO2-Y2O3纳米粉。用TG、DTA、XRD、TEM等方法对制备过程进行了表征。600℃煅烧后可得到粒径约为40nm的ZrO2-Y2O3纳米粉,粒子呈球形,粒度随焙烧温度的升高而增大。表明采用该法可获得ZrO2-Y2O3纳米粉,且能够有效地减少团聚现象的发生。 展开更多
关键词 硬脂酸 ZrO2-Y2O3 纳米粉 络合法 氧化锆 氧化钇 陶瓷
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等离子沉积ZrO_2-Y_2O_3陶瓷涂层与基体结合力的研究 认领 引用 被引量：1
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作者 孟琳 李凡 于维平 《材料保护》 CAS 北大核心 2002年第11期8-9,共2页
研究了在利用高能脉冲等离子方法沉积的ZrO2 Y2 O3 陶瓷涂层和NiCoCrAlY合金层之间加入陶瓷梯度结合层的技术 ,进行了涂层的截面形貌分析。实验结果证明 ,在加入陶瓷梯度结合层之后 ,提高了NiCoCrAlY合金的抗高温氧化性能及与ZrO2 Y2 O3... 研究了在利用高能脉冲等离子方法沉积的ZrO2 Y2 O3 陶瓷涂层和NiCoCrAlY合金层之间加入陶瓷梯度结合层的技术 ,进行了涂层的截面形貌分析。实验结果证明 ,在加入陶瓷梯度结合层之后 ,提高了NiCoCrAlY合金的抗高温氧化性能及与ZrO2 Y2 O3 ZrO2 陶瓷涂层的结合力。在实验的基础上提出了陶瓷涂层的物理模型。 展开更多
关键词 等离子沉积 ZrO2-Y2O3 陶瓷涂层 基体结合力 研究 高能脉冲等离子
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Effect of Al_2O_3on Structure and Wearability of Composite Coating 认领 引用 被引量：1
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作者 DING Hong-yan ZHANG Yue 《Journal of Iron and Steel Research International》 SCIE CAS 2004年第3期59-62,共4页
The composite coating was prepared by thermal spray welding after making composite powder,which is composed of Ni-based self-melted alloy and AlOceramic powder including nano,sub-micron and micron powders.The influenc... The composite coating was prepared by thermal spray welding after making composite powder,which is composed of Ni-based self-melted alloy and AlOceramic powder including nano,sub-micron and micron powders.The influences of contents and sizes of AlOon the structure and wearability were investigated.The results show that the wear resistance of the coating would be increased greatly by adding AlO,but the spray weldability decreases with increasing AlOcontent.So there is an optimal content of AlOpowder.The composite coating with AlOnano or sub-micron powder of 0.5% has the best abrasive resistance,while the optimal content of AlOmicron powder is 1 %. 展开更多
关键词 ceramic powder thermal spray welding composite coating Al2O3 nano-powder
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钇盐对铝合金表面PEO复合ZrO_2-Y_2O_3涂层组织及耐高温性能的影响 认领 引用
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作者 马群 李言 +2 位作者 王萍 韩婧 周立果 《材料热处理学报》 CAS CSCD 北大核心 2016年第12期132-139,共8页
采用改进的等离子体电解氧化(PEO)技术在锆盐体系和锆盐-钇盐体系电解液中制备ZAl Sil2Cu3Ni2合金表面ZrO_2-Y_2O_3陶瓷层和Y_2O_3-ZrO_2-Y_2O_3陶瓷层,研究电解液中稀土钇盐Y(NO_3)_3对PEO陶瓷层组织和耐高温性能的影响。通过SEM、XRD... 采用改进的等离子体电解氧化(PEO)技术在锆盐体系和锆盐-钇盐体系电解液中制备ZAl Sil2Cu3Ni2合金表面ZrO_2-Y_2O_3陶瓷层和Y_2O_3-ZrO_2-Y_2O_3陶瓷层,研究电解液中稀土钇盐Y(NO_3)_3对PEO陶瓷层组织和耐高温性能的影响。通过SEM、XRD等分析方法对陶瓷层的组织结构及相组成进行了分析,并对陶瓷层的隔热性能及高温稳定性进行了测试。结果表明,与ZrO_2-Y_2O_3陶瓷层相比,Y_2O_3-ZrO_2-Y_2O_3陶瓷层表面由细小颗粒组成,涂层均匀、致密;锆钇盐体系陶瓷层形成了钇部分稳定锆的固溶体(Y_2O_3和Y0.15Zr0.85O1.93□0.07),并提高了反应温度;Y_2O_3-ZrO_2-Y_2O_3陶瓷层生长速度大于ZrO_2-Y_2O_3陶瓷层,其中向外生长厚度明显增大;另外,隔热性能得到提高。Y_2O_3-ZrO_2-Y_2O_3陶瓷层试样经400℃高温氧化处理,其氧化增重曲线呈对数规律,氧化增重量小,表明高温稳定性良好。 展开更多
关键词 Al-12Si合金 稀土钇盐 等离子体电解氧化 ZrO2-Y2O3陶瓷层 隔热性能 高温氧化
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Fe-13Cr合金沉积(ZrO2-Y2O3)/(Al2O3-Y2O3)微叠层的抗氧化性能 认领 引用
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作者 姚明明 何业东 +1 位作者 王德仁 高唯 《中国稀土学报》 CAS 北大核心 2005年第5期559-559,共1页
采用交替电化学沉积和烧结的方法在Fe-13Cr合金表面制备（ZrO2-Y2O3）／（Al2O3-Y2O3）微叠层复合膜。采用高分辨扫描电镜（FE-SEM）对微叠层进行表征，结果表明（ZrO2-Y2O3）／（Al2O3-Y2O3）微叠层具有纳米结构。采用SEM，DES和增重... 采用交替电化学沉积和烧结的方法在Fe-13Cr合金表面制备（ZrO2-Y2O3）／（Al2O3-Y2O3）微叠层复合膜。采用高分辨扫描电镜（FE-SEM）对微叠层进行表征，结果表明（ZrO2-Y2O3）／（Al2O3-Y2O3）微叠层具有纳米结构。采用SEM，DES和增重法用来研究Fe-13Cr合金沉积（ZrO2-Y2O3）／（Al2O3-Y2O3）微叠层的抗氧化性能。实验结果表明，这种微叠层对合金抗氧化性能的提高优于分别沉积ZrO2-Y2O3或Al2O3-Y2O3膜，其抗氧化性能随着涂层中层次的增加而提高。这些有益效应可归于这种微叠层综合了ZrO2-Y2O3或Al2O3-Y2O3膜的各种优点同时克服了缺点。 展开更多
关键词 微叠层复合膜 电化学沉积 氧化 Fe-13Cr合金 抗氧化性能 叠层 合金 ZrO2-Y2O3 复合膜 表面制备
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Thermodynamics of some ZrO_2-containing ceramics 认领 引用
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作者 李麟 Omer Van der Biest +2 位作者 黄水根 Jef Vleugels 王佩玲 《Journal of Shanghai University(English Edition)》 2006年第1期65-73,共9页
Thermodynamic assessment in the ternary systems ZrO2 -CeO2 -Y2 O3, ZrO2 -CeO2 -Ce2 03 and the limiting binaries ZrO2 -Y2 O3, ZrO2 -CeO2, CeO2 -Y2 03, ZrO2 -Ce2O3, CeO2 -Ce2O3 as well as the modeling for oxides are rev... Thermodynamic assessment in the ternary systems ZrO2 -CeO2 -Y2 O3, ZrO2 -CeO2 -Ce2 03 and the limiting binaries ZrO2 -Y2 O3, ZrO2 -CeO2, CeO2 -Y2 03, ZrO2 -Ce2O3, CeO2 -Ce2O3 as well as the modeling for oxides are reviewed comprehensively. Based on the recent estimations on the YO1.5-CeO2, ZrO2-CeO2 and ZrO2 -YO1.6 systems, isothermal sections at 1273 and 1 973 K of the ternary CeO2- ZrO2-YO1.5system are calculated. In the system of ZrO2-CeO2-Ce2O3, the complex relation between the nonstoichiometry （y） in CeO2-x, the composition of the ZrO2 -CeO2 solid solution and the oxygen partial pressure （Po2 ） for different ZrO2 containing solid solutions CexZr1-xO2-x. are evaluated from 1 473 to 1 773 K. The relation between the degree of Ce^＋4 reduction to Ce.3 under different Po2 in the fluorite CeO2-xy and CexZr1-xOz-x solid solutions at different temperatures can be used as a guide in the development of functional ceramics. 展开更多
关键词 ZrO2 Y2O3 Ce2O3 CeO2 CeO2-y C3xZr10xO2-x ceria reduction thermodynamics oxygen partial pressure phase diagram.
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ZrO2-Y2O3陶瓷双相(t+m)组织的复合韧化 认领 引用
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作者 周玉 雷廷权 +1 位作者 葛启录 佐久间健人 《机械工程学报》 CAS 北大核心 1991年第6期12-17,共6页
本文采用TEM及XRD等手段研究了ZrO2-2mol％Y2O03陶瓷的组织结构并测试了力学性能。结果表明：随烧结温度升高，致密度增加，但硬度却随单斜相含量的增多而下降。与单一的四方相(TZP)相比，含有显微裂纹的t+m(PSZ)双相组织具有更高的断... 本文采用TEM及XRD等手段研究了ZrO2-2mol％Y2O03陶瓷的组织结构并测试了力学性能。结果表明：随烧结温度升高，致密度增加，但硬度却随单斜相含量的增多而下降。与单一的四方相(TZP)相比，含有显微裂纹的t+m(PSZ)双相组织具有更高的断裂韧度。这是由于前者只有相变韧化效果，而后者则同时有相变韧化、显微裂纹韧化及残余应力(应变)韧化的多重复合机理作用的结果。 展开更多
关键词 陶瓷 相变 显微裂纹 残余应力 力学性能 ZrO2-Y2O3
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ZrO_2-Y_2O_3、ZrO_2-MgO赝二元系相平衡的研究 认领 引用
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作者 杜勇 金展鹏 黄培云 《硅酸盐学报》 CAS 北大核心 1989年第6期507-513,共7页
用双亚点阵模型处理了ZrO_2-Y_2O_3、ZrO_2-MgO系统中的体心立方ZrO_2基固溶体相。用正态分布函数和样条函数相结合的方法,由部分相图数据优化了上述赝二元系中各相的相互作用参数,并用优化的相互作用参数及本工作估计的各氧化物的点阵... 用双亚点阵模型处理了ZrO_2-Y_2O_3、ZrO_2-MgO系统中的体心立方ZrO_2基固溶体相。用正态分布函数和样条函数相结合的方法,由部分相图数据优化了上述赝二元系中各相的相互作用参数,并用优化的相互作用参数及本工作估计的各氧化物的点阵稳定性参数计算了上述赝二元系相图。此外,还用DTA和X射线衍射方法测定了赝二元系在1300℃以下的固态相关系。计算结果与实验结果符合。 展开更多
关键词 ZrO2-Y2O3 ZrO2-MgO 赝二元系 相图
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Microstructural Characteristics and Wear Performance of Plasma Sprayed Al_2O_3-13 wt. % TiO_2 Coating on the Surface of Extrusion Wheel 认领 引用
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作者 ZHANG Xue-fei REN Li-min 《International Journal of Plant Engineering and Management》 2013年第3期165-172,共8页
The conventional Al2O3-13 wt. % TiO2 composite ceramic coatings are fabricated by plasma spraying on the surface of extrusion wheel. The microstrueture, morphology and phase compositions of the substrate and coat- ing... The conventional Al2O3-13 wt. % TiO2 composite ceramic coatings are fabricated by plasma spraying on the surface of extrusion wheel. The microstrueture, morphology and phase compositions of the substrate and coat- ing are investigated by using X-ray diffractometry （XRD） , scanning electron microsopy （SEM） and energy dis- persive spectroscopy （EDS）. Moreover, the microhardness of the substrate and the coating are investigated using Vickers mierohardness tester, the friction and wear behaviors of the substrate and the coating are investigated by using a block-on-ring tribometer under dry sliding conditions with the load of 245 N. The results show that both γ-Al2O3 and α-Al2O3 phases are observed in the as-sprayed coatings, the mian phase is γ-Al2O3. There are white particulates Al2O3 on its surface. The Al2O3-13 wt. % TiO2 coating possesses higher mierohardness which is about 1018HV and 1.6 times that of the substrate. The wear performance of coating is better than that of the substrate. In a practical application, the life of the extrusion wheel which is plasma sprayed Al2O3-13 wt. % TiO2 coating on the surface is 1.2 times that of the conventional extrusion wheel, and the life is about 330 h. 展开更多
关键词 extrusion wheel plasma spraying Al2O3-13 wt. % TiO2 ceramic coating wear performance
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ZrO_2-Y_2O_3超细粉的制备及性能研究 认领 引用
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作者 刘义为 佘远斌 李琬 《河北陶瓷》 1992年第5期15-18,共4页
本文采用均匀沉淀法和共沉淀两种方法制备ZrO_2—Y_2O_3超细粉平均粒径为0.013μm。同时对所制备的超细粉性能进行了研究,结果表明两种方法都能制备出与日本第一稀元素化学工业株式会社制备的超细粉性能相当的超细粉。对比两种方法所制... 本文采用均匀沉淀法和共沉淀两种方法制备ZrO_2—Y_2O_3超细粉平均粒径为0.013μm。同时对所制备的超细粉性能进行了研究,结果表明两种方法都能制备出与日本第一稀元素化学工业株式会社制备的超细粉性能相当的超细粉。对比两种方法所制备的超细粉,发现用均匀沉淀法所制备的超细粉颗粒较细且分布均匀,团聚参数小,烧结性能好。 展开更多
关键词 陶瓷 氧化物陶瓷 ZrO2-Y2O3 超细粉 制备
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(Y_2O_3,CaO)复合掺杂ZrO_2材料的交流复阻抗研究 认领 引用 被引量：2
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作者 李英 唐子龙 +1 位作者 龚江宏 张中太 《功能材料》 EI CAS 北大核心 2001年第3期282-284,共3页
借助交流复阻抗技术对（1－0．08y－0．12x－ZrO2－0．08yY2O3－0．12xCaO（x＋y＝1，x：0～1）系统在523～973K内的导电行为进行了研究。发现随着 CaO含量增加，该系统的晶粒电导活化能的增加，而晶界电导活化能则呈现先降后升的趋势... 借助交流复阻抗技术对（1－0．08y－0．12x－ZrO2－0．08yY2O3－0．12xCaO（x＋y＝1，x：0～1）系统在523～973K内的导电行为进行了研究。发现随着 CaO含量增加，该系统的晶粒电导活化能的增加，而晶界电导活化能则呈现先降后升的趋势．本文对上述现象进行了初步分析。 展开更多
关键词 ZrO2-Y2O3-CaO系统 电导率 复阻抗技术 电导活化能 晶界效应
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