通过盐浴镀方法实现金刚石表面镀Ti,并采用模压铸造方法制备镀Ti金刚石/Al复合材料。研究镀层对复合材料微观结构和热性能的影响。结果表明金刚石表面镀Ti改善了复合材料的界面结合,降低界面热阻,从而提高了复合材料的热性能,包括降低热膨胀系数,提高复合材料的热导率。采用850℃盐浴镀Ti,镀覆时间180min得到的镀Ti金刚石/Al复合材料热导率高达488W/（m.K）,在温度范围50～300℃之间,其平均热膨胀系数为9×10-6/K。
The Ti coated diamond was achieved by salt-bath plating,and then the Ti coated diamond/Al composites were fabricated by squeeze casting.The effect of Ti coating on the microstructure and thermal properties of composites were investigated.The results show that the thermal properties of composites were improved by the Ti coating on diamond particles to get the good interface bonding and decrease thermal boundary resistance between diamond and aluminum,including a reduced thermal expansion and a high thermal conductivity.Under plating condition 850℃ and 180min,thermal conductivity of Ti-coated diamond/Al was 488 W/（m·K）,along with average coefficient of thermal expansion was 9×10-6 /K between 50-300℃.
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