将两种颗粒增韧相与HfB2陶瓷基体按配比混料、热压制备了双相颗粒混杂增韧HfB2陶瓷复合材料,重点研究其高温压缩性能、热膨胀性能、耐烧蚀性能以及显微组织.结果表明,HfB2复合材料的室温压缩性能较高,但高温下压缩性能显著下降.随着温度升高,HfB2复合材料的体积膨胀率单调增加;平均线膨胀系数变化平缓;而瞬时线膨胀系数先减小后增大,有一个最小值,最小瞬时线膨胀系数在900℃,其值为5.65×10-6/K.该复合材料在等离子电弧加热器上烧蚀8s后,部分韧化相熔化飞出,留下孔洞.
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