CAJ | 학술논문

合成了硼吖嗪和全氢聚硅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炭纤维编制体为原料,采用先驱体浸渍-裂解(PIP)工艺制得了炭纤维增强氮化物基体的复合材料,并对复合材料基体的抗氧化性以及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,无其他杂质;基体材料在空气中具有优良的抗氧化性能,温度升至1000℃时仍未发生明显的质量变化,明显优于C/C复合材料;四个PIP工艺循环所制得的复合材料烧蚀表面平整,氮化物基体比增强炭纤维具有更好的耐烧蚀性能.
합성료붕아진화전경취규담완적혼잡선구체병대기결구진행료표정;이혼잡선구체화3D탄섬유편제체위원료,채용선구체침지-렬해(PIP)공예제득료탄섬유증강담화물기체적복합재료,병대복합재료기체적항양화성이급항소식성능진행료연구.결과표명:혼잡선구체중함유B-N、B-H、Si-N、Si-H、N-H등결구,무기타잡질;기체재료재공기중구유우량적항양화성능,온도승지1000℃시잉미발생명현적질량변화,명현우우C/C복합재료;사개PIP공예순배소제득적복합재료소식표면평정,담화물기체비증강탄섬유구유경호적내소식성능.
A hybrid precursor containing borazine and perhydropolysilazane was synthesized and characterized,and used to produce three-dimensional carbon fiber reinforced nitride matrix composites (3D C_f /Nitrides) through vacuum infiltration of the precursor followed by pyrolysis under inert atmosphere.The oxidation resistance and ablation behavior of the C_f/Nitrides were studied.Results showed that there were several bonds such as B-N,B-H,Si-N,Si-H and N-H in the hybrid precursor and the as-formed matrix had a good oxidation resistance.The matrix weight did not change distinctly when the temperature was increased from room temperature to 1 000 ℃.The surface of the ablated composites was flat and the nitride matrix had a much better ablation resistance than did the carbon fibers.