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王学政,王海滨,宋晓艳,刘雪梅,由德强,杨涛.超细/纳米结构WC-10Co-4Cr涂层的透射电镜表征与性能分析[J].稀有金属材料与工程(英文),2017,46(3):704~710.[Wang Xuezheng,Wang Haibin,Song Xiaoyan,Liu Xuemei,You Deqiang,Yang Tao.TEM Characterization and Performance Analysis of Ultrafine / Nanostructured WC-10Co-4Cr Coating[J].Rare Metal Materials and Engineering,2017,46(3):704~710.]
TEM Characterization and Performance Analysis of Ultrafine / Nanostructured WC-10Co-4Cr Coating
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Received:September 07, 2015  Revised:November 13, 2015
DOI:
Key words: in situ synthesis  high velocity oxygen fuel  ultrafine/nanostructured WC-10Co-4Cr coating  microscopic structure
Foundation item:国家“863”计划主题项目 (项目号 SS2013AA031401),北京市自然科学基金重点项目(项目号2131001),北京市自然科学(项目号2154045)
Author NameAffiliationE-mail
Wang Xuezheng College of Materials Science and Engineering,Key Laboratory of Advanced Functional Materials,Education Ministry of China,Beijing University of Technology w2003-2008@163.com 
Wang Haibin College of Materials Science and Engineering,Key Laboratory of Advanced Functional Materials,Education Ministry of China,Beijing University of Technology  
Song Xiaoyan College of Materials Science and Engineering,Key Laboratory of Advanced Functional Materials,Education Ministry of China,Beijing University of Technology songxy@bjut.edu.cn 
Liu Xuemei College of Materials Science and Engineering,Key Laboratory of Advanced Functional Materials,Education Ministry of China,Beijing University of Technology  
You Deqiang College of Materials Science and Engineering,Key Laboratory of Advanced Functional Materials,Education Ministry of China,Beijing University of Technology  
Yang Tao College of Materials Science and Engineering,Key Laboratory of Advanced Functional Materials,Education Ministry of China,Beijing University of Technology  
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Abstract:
      The ultrafine/nanostructured WC-10Co-4Cr composite powder was synthesized by reduction and carburization reactions, the composite powder was agglomerated to prepare the composite powder feeding that was used in spraying, then the ultrafine/nanostructured WC-10Co-4Cr coating was prepared by high velocity oxygen fuel (HVOF). The phases, elemental distribution and microstructure of the coating were characterized by X-ray diffraction (XRD) and transmission electron microscope (TEM), and then the wear resistance and corrosion resistance of the coating were tested. The results show that the main phases of the coating is WC , binding phase of amorphous structure is Co(Cr), and there is a little W2C phase of hexagonal crystal structure and W2C Co(Cr) multiphase of amorphous coexisting. The change rule of WC grain were obtained from phase boundary to eutectic area to Co area by the quantitative analysis of distribution of Co and Cr element in coating. Combined WC-10Co-4Cr composite powder and process characteristics of HVOF, explain the causes of Cr in the WC-10Co-4Cr coating distribution, and discusses the impact on the coating performance.