二维编织C/SiC复合材料高温拉伸性能研究  

Research of tensile performance of 2D weave C/SiC compositesat high temperature

作　　者：张伟[1,2] 吕胜利[1] 吕毅[2] 安国锋[2] 

机构地区：[1]西北工业大学无人机特种技术重点实验室,西安710072 [2]西北工业大学航空学院,西安710072

出　　处：《强度与环境》2009年第1期22-26,共5页Structure & Environment Engineering

基　　金：国家自然科学基金(10372081)资助项目

摘　　要：对二维编织C/SiC复合材料在1300°C高温氩气、湿氧环境下拉伸性能进行了实验,结合断口观察分析了其在拉伸载荷下的损伤和破坏机理。试验结果表明,二维编织C/SiC复合材料在高温氩气、湿氧环境下表现为非线性特征,通过对比发现,由于氧化作用,高温氩气环境下拉伸强度、破坏应变和比例极限均高于高温湿氧环境。断口观察表明,基体开裂、层间分层以及纤维和纤维束的断裂拔出是材料拉伸破坏的主要形式。The tensile mechanical performance of 2D weave C/SiC has been investigated at 1300℃ in argon and wet oxygen. The damage and failure mechanisms were also analyzed by microscope.It is found that the responses of axial tension loading are nonlinear.The tensile strength, destructive strain and scale limit in argon are all higher than in wet oxygen due to oxidation. Fractography analysis show that the main destruction contained matrix cracks, delamination, tension fracture of fiber and longitudinal fiber shear fracture.

关 键 词：二维编织C/SiC 高温氩气 湿氧环境 拉伸性能 断口 

分 类 号：TB33[一般工业技术—材料科学与工程]