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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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碳--高硅氧纤维增强c--sic防热隔热一体化材料
Keywords: 复合材料,化学气相渗,防热,隔热
Abstract:
？制备了一种新型的防热隔热一体化材料--碳--高硅氧纤维增强c--sic复合材料,沿厚度方向从抗烧蚀层渐次过渡到隔热层,其组成依次是致密c/c--sic,致密c/c,多孔c/c,通过界面处过渡到变密度多孔hsf/c.这种材料既具有抗烧蚀性能又具有隔热性能.c/c--sic复合材料的烧蚀表面平滑,线烧蚀率只有0.028mm/s.烧蚀性能的提高得益于sic颗粒原位氧化生成sio$_{2}$黏附在碳材料表面,对氧气有一定的阻挡遮蔽作用.密度为0.80g/cm$^{3}$的hsf/c材料,热导率为0.59w/mk.在碳纤维与高硅氧织物的界面处,针刺纤维与热解碳的结合良好,密度为1.69g/cm$^{3}$的c--hsf/c复合材料界面处的剪切强度达到16.7mpa
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