CSCVI法快速制备C纤维增韧SiC基复合材料及其微观结构  

Fabrication of SiC Matrix Composites Reinforced by Carbon Tows Using CSCVI Method and its Microstructure

作　　者：肖鹏[1] 徐永东[2] 黄伯云[1] 

机构地区：[1]中南大学粉末冶金国家重点实验室,长沙410083 [2]西北工业大学凝固技术国家重点实验室,西安710072

出　　处：《机械科学与技术》2002年第4期612-614,共3页Mechanical Science and Technology for Aerospace Engineering

基　　金：国家自然科学基金项目 ( 5 9772 0 31)

摘　　要：采用一种改进的 CVI工艺 (CSCVI法 )制备连续炭纤维增韧 Si C基复合材料 ,使预制体的编织与 Si C基体的沉积同步复合进行。在不同的工艺条件下 ,制备了 C/Si C复合材料 ,观察了其微观结构。结果表明 :CSCVI- C/Si C中的残留孔隙很小且明显小于 ICVI- C/Si C中的残留孔隙 ;CSCVI具有快速制备孔隙率低、体积密度较高的 C/Si C复合材料的能力 ;纤维束缠绕转轴的线速度直接影响到 C/Si C的显气孔率、纤维束间 Si C基体墙的厚度和 C/Si C复合材料的最终体积密度。SiC matrix composites reinforced by continuous carbon fibers were fabricated using an improved chemical vapor infiltration (Continuous Synchronous CVI, CSCVI) process, so that the weaving of continuous carbon fibers and deposition of SiC go along synchronously. Under different processing condition, C/SiC composites were fabricated and their microstructures were observed. The size of remnant pores of CSCVI-C/SiC composites is very small and less than that of ICVI-C/SiC composites. CSCVI process has a capacity for fabrication of C/SiC with low porosity and high density. Some characters of C/SiC composites, such as open porosity, thickness of SiC matrix and final density, are directly effected by the winding linear velocity of carbon tows.

关 键 词：CSCVI CVI C/SIC 微观结构 复合材料 制备 

分 类 号：TB332[一般工业技术—材料科学与工程]