个人信息Personal Information
教授
博士生导师
硕士生导师
性别:男
毕业院校:大连理工大学
学位:博士
所在单位:材料科学与工程学院
学科:材料表面工程
办公地点:Room 218, School of Materials Science and Engineering
联系方式:0411-84707254
电子邮箱:xpzhu@dlut.edu.cn
The effect of irradiation parameters of high-intensity pulsed ion beam on tribology performance of YWN8 cemented carbides
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论文类型:期刊论文
发表时间:2012-09-25
发表刊物:SURFACE & COATINGS TECHNOLOGY
收录刊物:SCIE、EI、Scopus
卷号:209
页面范围:143-150
ISSN号:0257-8972
关键字:Irradiation parameters; High intensity pulsed ion beam; Tribology performance; Cemented carbides
摘要:In order to investigate the effect of processing parameters of high-intensity pulsed ion beam (HIPIB) on the performance of WC-Ni which contained 8% Ni (YWN8), four groups of parameters, with current densities of 100. 200 and 300 A/cm(2) with one to five shots, were selected to irradiate the samples. The microstructure, morphology and topography of YWN8 cemented carbides before and after irradiated were given. It revealed that the polishing scratches and some mechanical debris formed in the grinding process on the YWN8 surface could be well cleared under appropriate irradiation parameters in which the surface absorption energy was about all J (the medium ion current density of 300 A/cm(2) with 1 shot and of 100 A/cm(2) up to 5 shots). The friction and wear performance test done by SRV indicated that with these processing parameters, the tribological performance of irradiated YWN8 and carbon graphite impregnated with antimony was obviously improved where the friction coefficient reduced from 0.1 to 0.06-0.07. The results of X-ray diffraction (XRD) showed that graphite emerged on the surface due to the implantation of C+ and decomposition of WC under high temperature during irradiation improving self-lubricity of YWN8. In addition, adhesive wear of the carbon graphite was distinctly moderated while rubbed with irradiated YWN8 because the polishing scratches on the surface have been well removed after irradiation. (C) 2012 Published by Elsevier B.V.