合成了全氢聚硅氮烷和硼氮烷的混杂先驱体并对其结构进行了表征;以混杂先驱体和3D碳纤维编制体为原料,采用先驱体浸渍-裂解(PIP)工艺制得了碳纤维增强氮化硼-氮化硅混杂基体的复合材料,并对复合材料的力学性能和抗烧蚀性能进行了研究.结果表明,混杂先驱体中含有B-N,B-H,Si-N,Si-H,N-H等结构,无其它杂质出现;随着PIP工艺循环次数的增加,复合材料的密度随之提高;当进行4个循环时基本致密,密度达到1.50g/cm3,弯曲强度达到156.4 MPa;轨道模拟实验显示复合材料具有优异的抗烧蚀性能.
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