通过浇注工艺制备了短切碳纤维/AlN/环氧树脂复合材料,研究了复合材料热、电和力学性能.结果表明,复合材料的热导率、介电常数、弯曲强度和模量随短切碳纤维含量增加而上升,其电阻率则下降.当短切碳纤维体积含量由0变化到1.8%时,复合材料的热导率由1.14W·m-1K-1提高到1.45W·m-1K-1;弯曲强度和模量分别提高了14%和13%;而体积电阻率和表面电阻率分别由2.69×1015Ω·m和2.09×1013Ω降到6.16×1012Ω·m和2.95×1010Ω.复合材料的热膨胀系数随碳纤维含量变化不大.
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