利用表面镀钛及掺杂La_(2)O_(3)改善金刚石/铜复合材料性能的研究  

Improving Properties of Diamond/Cu Composites by Coating Titanium on Diamond Surface and Doping La2 O3

作　　者：郭梦华 张鹏 栗正新[1] 黄雷波 骈小璇 杨雪峰[1] 蒋丽萍 孙冠男 张鹏飞 Guo Menghua;Zhang Peng;Li Zhengxin;Huang Leibo;Pian Xiaoxuan;Yang Xuefeng;Jiang Liping;Sun Guannan;Zhang Pengfei(School of Materials Science and Engineering,Henan University of Technology,zhengzhou 450000,China;Zhengzhou Xinya Composite Superhard Material Co.,Ltd.,Zhengzhou 450000,China;Zhengzhou Diamond Precision Manufacturing Co.,Ltd.,Zhengzhou 450000,China;Zhengzhou Abrasive Grinding Research Institute Co.,Ltd.,Zhengzhou 450000,China)

机构地区：[1]河南工业大学材料科学与工程学院,河南郑州450000 [2]郑州新亚复合超硬材料有限公司,河南郑州450000 [3]郑州钻石精密制造有限公司,河南郑州450000 [4]郑州磨料磨具磨削研究所有限公司,河南郑州450000

出　　处：《中国稀土学报》2024年第6期1122-1131,I0002,共11页Journal of the Chinese Society of Rare Earths

基　　金：河南省2022年度重大科技专项(221100230100)资助。

摘　　要：采用磁控溅射方法在金刚石表面进行镀Ti,并采用放电等离子烧结技术制备金刚石体积分数为50%不同La2O3含量的金刚石/Cu复合材料,观察不同样品的相变化与表面微观形貌,利用激光闪射法测量样品热导率、阿基米德排水法测样品密度。结果表明:金刚石表面镀Ti能有效改善金刚石与Cu之间的界面结合情况,减少界面热阻,提高致密度,复合材料的致密度由金刚石未镀Ti时的81.3%提高到镀钛时的93.7%,相应热导率由276 W·(m·K)^(-1)提高到427 W·(m·K)^(-1);额外添加La2O3后,复合材料的致密度最高达98.6%,热导率最高达523 W·(m·K)^(-1),其各项性能得到进一步提升。Ti was coated on the surface of diamond by using magnetron sputtering,and diamond/Cu composites with 50%(volume fraction)of diamond and different La2 O3 contents were prepared by spark plasma sintering.The phase change and surface morphology of the sample were observed,the thermal conductivity of samples was measured by laser flash method,and the sample density was measured by Archimedes drainage method.The results indicate that coating Ti on diamond surface can effectively improve the interface bonding between diamond and Cu,reduce the interface thermal resistance and increase the density.The density of the composite increases from 81.3%without coated with Ti to 93.7%after coated with Ti,and the corresponding thermal conductivity increases from 276 to 427 W·(m·K)^(-1).On the basis of the above,the addition of La2 O3 can make the density of the composite up to 98.6%,and the thermal conductivity up to 523 W·(m·K)^(-1).All performances of the composite are further improved.

关 键 词：金刚石/Cu复合材料 界面热阻 镀TI 热导率 致密度 稀土 

分 类 号：TB333[一般工业技术—材料科学与工程]