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以高温盐浴法对金刚石表面进行镀硅处理来改善金刚石和铝基之间的界面结合,镀硅后的金刚石颗粒表面略显粗糙,表面的镀层均匀;采用真空热压烧结法制备高导热镀硅金刚石/铝复合材料,研究了烧结温度和金刚石体积分数对复合材料相对密度和热导率的影响。随着金刚石体积分数的增加,复合材料的相对密度和热导均呈现先升后降的趋势,当金刚石体积分数为45%时,复合材料的热导率达到最大,为558 W/mK。
The high temperature salt bath method is used to treat the diamond surface with silicon to improve the bonding between the diamond and the aluminum. The surface of the diamond after the silicon coating is slightly rough and the coating on the surface is even. Vacuum hot- Silicon diamond / aluminum composite material, the effects of sintering temperature and diamond volume fraction on the relative density and thermal conductivity of the composites were investigated. With the increase of volume fraction of diamond, the relative density and thermal conductivity of the composites tended to increase firstly and then decrease. When the volume fraction of diamond was 45%, the thermal conductivity of the composites reached 558 W / mK.