CVI法制备SiCp/SiC复合材料的微结构与性能研究  

MICROSTRUCTURE AND PROPERTIES OF SICP/SIC COMPOSITE MANUFACTURED BY CVI

作　　者：王晓明[1] 李镇[1] 成来飞[1] 张立同[1] 徐永东[1] 

机构地区：[1]西北工业大学超高温结构复合材料国防科技重点实验室,陕西,西安,710072

出　　处：《玻璃钢／复合材料》2005年第3期27-29,共3页Fiber Reinforced Plastics/Composites

基　　金：国家自然科学基金重大研究计划项目(90405015);国家杰出青年科学基金项目(50425208)

摘　　要：本文对用CVI法制备的SiCp/SiC复合材料的微结构与性能进行了研究。通过造粒使颗粒成为类似纤维束的均匀团聚体,通过预制成型使颗粒成为类似纤维预制体的坯体后进行化学气相渗透(CVI)。由这种工艺制备的复合材料弯曲强度达到163MPa;成分包括α2SiC、6HSiC及石墨化的碳。它具有适当弱界面层增韧和非均匀复合效应等增韧途径。In this paper the microstructure and performance of SiCp/SiC composite prepared by chemical vapor deposition (CVI).Particle clusters similar with fiber bundle were obtained by granulation process. Through pre-form process, these particle clusters were used to make green body similar with fiber preform. Then, CVI was applied to deposit SiC matrix in the green body. The composits strength by this process could reach 163MPa. α-SiC、6HSiC and graphite were found in the composite. The toughening mechanisms of this composite mainly included moderate weak interface by PyC and ununiform toughening effect.

关 键 词：化学气相渗透(CVI) SiCp/SiC复合材料 团聚体 微结构与性能 

分 类 号：TB332[一般工业技术—材料科学与工程]