超音速喷涂界面的微结构与界面结合强度  

Study on The Microstructure and Bond Strength of HVOF Sprayed Interfaces

作　　者：邵贝羚[1] 刘安生[1] 王晓华[1] 李灏[1] 邹琳瑛 施昌勇[1] 周贻茹[1] 

机构地区：[1]北京有色金属研究总院

出　　处：《电子显微学报》1997年第3期271-276,共6页Journal of Chinese Electron Microscopy Society

基　　金：国家自然科学基金

摘　　要：超音速火焰（ＨＶＯＦ）喷涂界面结合强度因喷涂材料和衬底材料的变化而异，本文通过对几种不同材料的ＨＶＯＦ喷涂界面微结构的研究揭示了影响喷涂界面结合强度的微观结构本质。本工作采用拉伸和剪切法测定了Ｎｉ／Ｃｕ，Ｎｉ／Ｔｉ，ＷＣ＋Ｃｏ／Ｔｉ，ＷＣ＋Ｃｏ／６０Ｓｉ２Ｍｎ，ＷＣ＋Ｃｏ／４５钢等ＨＶＯＦ喷涂界面的结合强度，利用扫描电子显微术（ＳＥＭ）、透射电子显微术（ＴＥＭ）、Ｘ射线能量散射谱（ＥＤＳ）和高分辨电子显微术（ＨＲＥＭ）对涂层、衬底以及喷涂界面的微结构、微成分特征进行了观察和分析，揭示出影响喷涂界面结合强度的主要结构因素是界面的非晶化和界面区的强变形、应力集中和微裂纹扩展。The bond strength of HVOF(high velocity oxygen fuel)sprayed interfaces are different for each other prepared with the different spray powders and substrate materials.The HVOF interface characteristics of several coatings/substrates,Ni/Cu,Ni/Ti,WC+Co/60Si2Mn,WC+Co/Ti,WC+Co/45 steel,and the effects of the interface microstructure on the bond strength of the HVOF interfaces were studied using SEM,TEM,HREM and EDS.It is revealed that the main microstructural factors affecting the HVOF sprayed interface bonding strength are the amorphous phase layer in the HVOF interface and the heavy deformation and stress concentration in the area of substrate near the HVOF interface.Therefore,controlling the formation of amorphous phase in HVOF interface and the deformation of the substrate surface is a important way to improve the bond strength of HVOF interface.

关 键 词：超音速火焰喷涂 界面结构 结合强度 金属陶瓷 

分 类 号：TG174.45[金属学及工艺—金属表面处理]