CAJ | 학술논문

以低密度的C/C复合坯体为预制体,分别采用反应熔渗(RMI)、化学气相沉积(CVD)、浸渍-原位反应技术对其进行陶瓷改性.结果表明:改性陶瓷分别以SiC和c-BN的形式渗入C/C复合坯体内.摩擦试验结果表明:采用RMI技术制备的C/C-SiC复合材料摩擦因数较高,高达0.3到0.9;采用CVD技术制备的C/C-SiC复合材料的摩擦因数在0.20～0.36之间;而采用浸渍-原位反应技术制备的c-BN改性C/C复合材料的摩擦因数较低,为0.10～0.20.SEM观察表明:采用RMI技术制备的C/C复合材料的摩擦表面粗糙、未形成完整的摩擦膜,而采用另两种技术制备的C/C复合材料均形成了较完整、致密的摩擦膜.
이저밀도적C/C복합배체위예제체,분별채용반응용삼(RMI)、화학기상침적(CVD)、침지-원위반응기술대기진행도자개성.결과표명:개성도자분별이SiC화c-BN적형식삼입C/C복합배체내.마찰시험결과표명:채용RMI기술제비적C/C-SiC복합재료마찰인수교고,고체0.3도0.9;채용CVD기술제비적C/C-SiC복합재료적마찰인수재0.20～0.36지간;이채용침지-원위반응기술제비적c-BN개성C/C복합재료적마찰인수교저,위0.10～0.20.SEM관찰표명:채용RMI기술제비적C/C복합재료적마찰표면조조、미형성완정적마찰막,이채용령량충기술제비적C/C복합재료균형성료교완정、치밀적마찰막.
The low density C/C composites were modified by B and Si using reaction melt infiltration (RMI), chemical vapour deposition (CVD) and impregnation and in-situ reaction. The results show that the modified ceramics are successfully added in the matrix carbon as SiC or c-BN. The C/C-SiC modified by RMI has high friction coefficient which reaches 0.30-0.90. The friction coefficient of C/C-SiC modified by CVD changes in 0.20-0.36, while the composites modified by c-BN using impregnation and in-situ reaction hold the lowest friction coefficient, which is 0.10-0.20. The wear surfaces of the RMI-modified composites are very rough without any integrated friction film, while the wear surfaces of the other two composites are compacted and integrated.