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Study on grinding material modification of nickel base single crystal superalloy by CEL method 认领 引用
1
作者 Pengfei Liu Pengyu Liu 《Surface Science and Technology》 CSCD 2025年第1期506-521,共16页
To investigate material modifications in DD6 single-crystal superalloy during grinding,a three-dimensional finite element model(3D FEM)for single-grit grinding of DD6 was developed.To address challenges such as severe... To investigate material modifications in DD6 single-crystal superalloy during grinding,a three-dimensional finite element model(3D FEM)for single-grit grinding of DD6 was developed.To address challenges such as severe mesh distortion encountered in grinding simulations,the Couple+d Eulerian–Lagrangian(CEL)method was proposed and implemented.The influence of various grinding process parameters on surface integrity,as well as the variations in plastic deformation and residual stress within the surface and subsurface layers,were studied.The effectiveness of the simulation model was subsequently validated through experimental investigations.The results demonstrated that different grinding parameters led to the generation of distinct types of grinding chips,with the machined surface exhibiting varying degrees of damage.Grinding process parameters were found to significantly influence material modifications.The optimal process parameters were determined to be:wheel linear speed(vs)=35 m/s,grinding depth(ap)=20μm,and feed rate(vw)=0.6 m/min.This study offers new insights for predicting the grinding performance of DD6 alloy and optimizing grinding processes. 展开更多
关键词 Grinding process DD6 nickel-based single-crystal superalloy ABAQUS finite element analysis Material modification Process parameter optimization
Sulfur vacancy-rich CdS loaded on filter paperderived 3D nitrogen-doped mesoporous carbon carrier for photocatalytic VOC removal 认领 引用 被引量：2
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作者 Lusha Wang Xinxin Xu +2 位作者 Yun Wang Xinjiao Wang Fa-nian Shi 《Inorganic Chemistry Frontiers》 SCIE EI 2018年第6期1470-1476,共7页
A simple method is developed for the synthesis of a sulfur vacancy-rich CdS-based composite photocatalyst with a three-dimensional nitrogen-doped mesoporous carbon matrix using a Cd(II)-based coordination polymer and ... A simple method is developed for the synthesis of a sulfur vacancy-rich CdS-based composite photocatalyst with a three-dimensional nitrogen-doped mesoporous carbon matrix using a Cd(II)-based coordination polymer and filter paper as precursors.Using this strategy,an excellent composite photocatalyst(CdS@3D-NPC)is synthesized successfully,in which CdS nanoparticles with a small size(about 6 to 8 nm)are distributed homogenously in the three-dimensional nitrogen-doped mesoporous carbon matrix.During calcination,some coordinated nitrogen atoms from the organic ligands occupy the sites of S2−and dope in the lattice of CdS,which produces abundant sulfur vacancies.These sulfur vacancies promote the transportation of photogenerated electrons and their separation from photogenerated holes,which enhance the photocatalytic activity of the composite material.CdS@3D-NPC shows a promising performance for the decomposition of volatile organic compounds(VOCs),such as formaldehyde and benzene gas.The stability and durability of CdS@3D-NPC are outstanding.Its VOC removal efficiency remains as high as 95%of the original value after five continuous cycles of photocatalytic reaction for 30 h.The mechanism study illustrates that the excellent VOC removal performance originates from the synergetic effect of sulfur vacancies and excellent conductivity of the three-dimensional nitrogen-doped mesoporous carbon matrix.We anticipate that CdS@3D-NPC will be employed as an ideal tool for indoor air purification. 展开更多
关键词 cds photocatalytic voc removal composite photocatalyst filter paper sulfur vacancy rich composite photocatalyst cds d npc cds nanoparticles three dimensional nitrogen doped mesoporous carbon
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