采用真空压力浸渗法制备了金刚石/铝复合材料,研究了金刚石颗粒尺寸、品级等对复合材料热性能的影响.结果表明:在金刚石体积分数相同情况下,普通研磨级金刚石颗粒的尺寸越小,复合材料的热膨胀系数越低;用MBD4等级金刚石颗粒制备的金刚石/铝复合材料具有最小的热膨胀系数,为6.8×10-6K-1,其热导率最高;MBD4等级的金刚石颗粒与铝基体存在选择性粘附现象,金刚石的(100)面更容易与铝结合.
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