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作 者:Zhuo Liu Wei Cheng Dekui Mu Qiaoli Lin Xipeng Xu Han Huang
机构地区:[1]Institute of Manufacturing Engineering,Huaqiao University,Xiamen 361021,China [2]School of Materials Science and Engineering,Lanzhou University of Technology,Lanzhou 730000,China [3]School of Mechanical and Mining Engineering,The University of Queensland,Brisbane,QLD 4072,Australia
出 处:《Journal of Materials Science & Technology》2023年第13期138-149,共12页材料科学技术(英文版)
基 金:supported by the National Natural Science Foundation of China (No.51835004);the National Technology Development Project in Fujian province (No.2021L3012);funding support from Australia Research Council (ARC)through the Discovery Project Program (No.DP210102061).
摘 要:Interfacial bonding is one of the most challenging issues in the fabrication,and hence comprehensively influences the properties of diamond-based metal matrix composites(MMCs)materials.In this work,solid-state(S/S)interface reaction between single-crystal synthetic diamond and chromium(Cr)metal was critically examined with special attention given to unveil the role of crystal orientation in the for-mation and growth of interfacial products.It has been revealed that catalytically converted carbon(CCC)was formed prior to chromium carbides,which is counterintuitive to previous studies.Cr 7 C 3 was the first carbide formed in the S/S interface reaction,aided by the relaxation of diamond lattices that re-duces the interfacial mismatch.Interfacial Cr 7 C 3 and Cr 3 C 2 carbides were formed at 600 and 800℃,respectively,with the growth preferred on diamond(100)plane,because of its higher density of surface defects than(111)plane.Interfacial strain distribution was quasi-quantitively measured using windowed Fourier Transform-Geometric Phase Analysis(WFT-GPA)analysis and an ameliorated strain concentration was found after the ripening of interfacial carbides.Textured morphologies of Cr_(3)C_(2) grown on diamond(100)and(111)planes were perceived after S/S interface reaction at 1000℃,which is reported for the first time.The underlying mechanisms of Cr-induced phase transformation on diamond surface,as well as the crystal orientation dependent growth of interfacial carbides were unveiled using the first-principles calculation.The formation and growth mechanisms of Cr_(3)C_(2) were elucidated using SEM,TEM and XRD analyses.Finally,an approach for tailoring the interfacial microstructure between synthetic diamond and bonding metals was proposed.
关 键 词:SOLID-STATE Interface reaction Synthetic diamond Phase transformation Chromium carbide
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