康仁科

个人信息Personal Information

教授

博士生导师

硕士生导师

任职 : 国际磨粒技术学会(International Committee of Abrasive Technology, ICAT)委员,中国机械工程学会极端制造分会副主任、生产工程分会常务委员、微纳米制造技术分会常务委员,中国机械工程学会生产工程分会磨粒加工技术专业委员会副主任、切削加工专业委员会常委委员、精密工程与微纳技术专业委员会常委委员,中国机械工程学会特种加工分会超声加工技术委员会副主任,中国机械工程学会摩擦学分会微纳制造摩擦学专业委员会常务委员,中国机械工业金属切削刀具协会切削先进制造技术研究会常务理事、对外学术交流工作委员会副主任、切削先进制造技术研究会自动化加工技术与系统委员会副主任。

性别:男

毕业院校:西北工业大学

学位:博士

所在单位:机械工程学院

学科:机械制造及其自动化. 机械电子工程. 航空宇航制造工程

办公地点:机械工程学院7191

电子邮箱:kangrk@dlut.edu.cn

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Tribochemical polishing CVD diamond film with FeNiCr alloy polishing plate prepared by MA-HPS technique

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论文类型:期刊论文

发表时间:2012-01-01

发表刊物:DIAMOND AND RELATED MATERIALS

收录刊物:SCIE、EI

卷号:21

页面范围:50-57

ISSN号:0925-9635

关键字:Tribochemical polishing; CVD diamond film; Material removal mechanism; Polishing plate; Mechanical alloying; Hot-press sintering

摘要:A novel polishing plate is most important for tribochemical polishing (TCP) diamond. This paper investigated the mechanisms of TCP and pointed out the requirements for the polishing plate. Unpaired d electrons, vertical aligned principle, high hardness and oxidation resistance at elevated temperature were general requirements for polishing plate. Based on these requirements. FeNiCr alloy polishing plate was prepared by the combination technique of mechanical alloying and hot-press sintering. Optical microscope, scanning electron microscope, Talysurf surface profiler, X-ray diffraction, electron probe microanalysis and Raman spectroscope were employed to characterize the prepared polishing plate and identify the removal mechanism. It was found that FeNiCr alloy polishing plate had higher hardness and oxidation resistance than stainless steel 304 and cast iron. FeNiCr alloy polishing plate obtained a material removal rate of 3.7 mu m/min, which was higher than that of stainless steel 304 plate, cast iron plate and TiAl alloy plate. The mechanism for TCP can be described as converting diamond into graphite through friction heating and the interaction of the diamond with a catalytic metal disk; the catalytic metal acted on the diamond surface by means of their unpaired d electrons. If the metal structure of polishing plate was suitable to vertically bond with several carbon atoms on diamond surface, diamond would tend to convert into graphite more easily. Finally the non-diamond carbon was removed by mechanical friction, oxidation and diffusion into metal disk. (C) 2011 Elsevier B.V. All rights reserved.