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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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pip工艺参数对cf/bn-si3n4复合材料性能的影响
Abstract:
？以自合成的硼吖嗪(borazine)和全氢聚硅氮烷(perhydropolysilazane,phps)组成的混杂先驱体为原料,采用先驱体浸渍-裂解(pip)工艺制备3dcf/bnsi3n4复合材料,研究了pip工艺循环次数对复合材料的力学性能和烧蚀性能的影响.结果表明,随着循环次数的增加,复合材料的基体逐渐致密,材料的密度随之提高,材料的弯曲强度和杨氏模量随之提高.进行四个循环时,密度达到1.50g·cm-3,弯曲强度达到156.4mpa,杨氏模量达到45.9gpa.力学性能的增长规律与密度变化相一致.线烧蚀率随着致密度的提高而迅速下降.
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