磁性对人造金刚石单晶机械性能的影响  

Study on the Influence of Magnetism of Synthetic Diamond Single Crystal on Their Mechanical Performances

作　　者：罗中平[1] 姚亚林[2] 夏志华[1] 贺兵 

机构地区：[1]湖南工业大学机械工程学院,湖南株洲412008 [2]湖南工业大学电气与信息工程学院,湖南株洲412008

出　　处：《高压物理学报》2009年第3期236-240,共5页Chinese Journal of High Pressure Physics

基　　金：湖南省教育厅资助科研项目(07C236)

摘　　要：对人造金刚石单晶进行了磁性分离实验研究,在此基础上对各样品进行了静压强度、冲击强度和热冲击强度等方面的分析测试。结果表明,磁性对人造金刚石单晶的机械性能有明显的影响。金刚石单晶的磁性越强,其外观颜色越深,内部气泡和杂质及缺陷越多,表面光洁度越差,则其静压强度、常温冲击强度(IT)和热冲击强度指数(ITT)值就越低。磁性对静压强度和常温冲击强度的影响相对较小,而对热冲击强度的影响最大。Static-pressure strength, toughness index （IT） and thermal-toughness index （ITT） of each sample were analyzed on the basis of the experimental studies on the magnetic separation of diamond single crystal. The results show that the magnetism of synthetic diamond single crystal has an obvious influence on the mechanical performance. With the increase of magnetism, synthetic diamond single crystal becomes darker and darker in appearance color, and have more bubbles, impurities and defects inside the particles. Furthermore, their surface fineness observed under the microscope becomes worse. Meanwhile,the static-pressure strength, the IT under the normal temperature and ITT become lower and lower. The influence of magnetism on the static-pressure strength and the IT; is slight,however, the influence on ITT is serious.

关 键 词：人造金刚石 机械性能 磁分离 静压强度 冲击强度指数 

分 类 号：TQ164[化学工程—高温制品工业]