碳纤维CVD SiC涂层对C／SiC复合材料力学性能的影响  

Effects of Carbon Fiber CVD SiC Coatings on Mechanical Properties of C/SiC Composites

作　　者：周新贵[1] 游宇[1] 于海蛟[1] 羊建高 黄泽兰 

机构地区：[1]国防科技大学航天与材料工程学院新型陶瓷纤维及其复合材料国防科技重点实验室,湖南长沙410073 [2]江西崇义章源坞业,江西崇义341300

出　　处：《稀有金属材料与工程》2008年第A01期32-35,共4页Rare Metal Materials and Engineering

摘　　要：采用CVD+PIP工艺制备了SiC涂层碳纤维增强SiC复合材料(C/SiC),研究了碳纤维表面CVD SiC涂层的形貌以及涂层对C/SiC复合材料力学性能的影响。结果表明:CVD SiC涂层处理可以填补纤维表面上的沟槽和缺陷,使纤维表面变得光滑,从而使C/SiC复合材料的力学性能有很大提高,碳纤维经过CVD SiC 1 h涂层处理的C/SiC复合材料的力学性能最好,弯曲强度达到511.5 MPa,断裂韧性达到20.8 MPa·m^(1/2)。CVD （chemical vapor deposition） and PIP was combined to fabricate SiC coated carbon fiber reinforced silicon carbide composites. The morphology of the SiC coated carbon fiber and the mechanical properties of the C/SiC composites were studied. The CVD SiC coatings filled the ditch on the carbon fiber surface, by which the properties of the C/SiC composites were improved. The composite made from the C fiber by CVD coating for 1 h exhibited the bending strength up to 511.5 MPa and the fracture toughness up to 20.8 MPa·m^1/2.

关 键 词：化学气相渗透 先驱体浸渍裂解 碳化硅 复合材料 力学性能 

分 类 号：TB333[一般工业技术—材料科学与工程]