以BN、SiO2、AlN为原料,采用热压工艺制备出BN基复合陶瓷.研究了AlN添加量对复合陶瓷热学与抗热震性能的影响.结果表明:随着AlN添加量的增加,复合陶瓷的热膨胀系数呈现先降低后升高的趋势.当AlN的添加量为5vol％时,复合陶瓷的平均热膨胀系数最小,为2.22×106/K;复合陶瓷的热导率则随着AlN添加量的增加呈先升高后降低的趋势,当AlN的添加量为10vol％时达到最大值.未添加AlN的复合陶瓷热震后的残余强度随着热震温差的增大而升高;随着AlN的引入,复合陶瓷热震后的残余强度呈下降的趋势.对于添加5vol％AlN的复合陶瓷,经1 100℃热震后其残余强度为219.7MPa,强度保持率为88.9％,抗热震性良好.
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