原位生长碳纳米管对化学气相沉积SiC涂层的影响
Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals（2011）
Abstract
以碳/碳复合材料为基体,MTS为先驱体原料,采用化学气相沉积法在复合材料表面制备CNT-SiC/SiC复合涂层;研究原位生长的碳纳米管(CNTs)对SiC沉积速度和微观形貌的影响.结果表明:CNTs加快SiC的沉积,涂层的平均质量增加速率提高5%,提高沉积的均匀性,且晶粒更细小;经1 100℃恒温氧化10 h后,单一SiC涂层、CNT-SiC/SiC涂层的质量损失率分别为41.11%和34.32%;经(1 100℃,3 min)(→)(室温,3 min)热循环15次后,单一SiC涂层和CNT-SiC/SiC涂层的质量损失率分别为33.17%和30.25%,部分区域涂层脱落及涂层表面形成的气孔是涂层试样质量损失的主要原因.
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Key words
Carbon/carbon composites,Chemical vapor deposition,CNT-SiC/SiC composite coating,CNTs,Oxidation
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