先驱体转化2D C_f/SiC复合材料的拉伸行为研究  

Tensile Properties of 2D C_f/SiC Composites Fabricated by Precursor Infiltration and Pyrolysis

作　　者：刘静宇[1] 陈朝辉[2] 简科[2] 

机构地区：[1]长沙学院,湖南长沙410003 [2]国防科技大学,湖南长沙410073

出　　处：《稀有金属材料与工程》2007年第A03期339-342,共4页Rare Metal Materials and Engineering

基　　金：国防预研基金(51488030105ZS9504)

摘　　要：研究了先驱体转化2D C_f/SiC复合材料的拉伸行为。单向拉伸试验表明,材料的抗拉伸强度、拉伸模量和断裂应变分别为181.45MPa、64.95 GPa和0.744%。通过拉伸加载卸载试验分析了材料的拉伸失效过程,并对拉伸试验的应力应变曲线进行了拟合。结果表明,2D C_f/SiC复合材料拉伸破坏可以分为线弹性变形、基体破坏、纤维断裂和材料整体破坏4个阶段,拟合得到的曲线与试验曲线非常吻合。The tensile properties of the 2D Cf/SiC composites were characterized by uniaxial tensile tests, and the tensile strength, modulus and fracture strain of the composites were 181.45 MPa, 64.95 GPa and 0.744%, respectively. The tensile damage evolution processes and failure mechanism of 2D Cf/SiC composites were studied by loading and unloading tensile tests, and the tensile stress-strain curves of the composites were simulated. The results showed that the tensile fracture of the composites consisted of four stages： linear elastic deformation, damage of the matrix, fracture of the fibers and the failure of the whole composites, and the simulated curves were very close to the experimental curves.

关 键 词：2D CF/SIC复合材料 先驱体转化 拉伸行为 失效 

分 类 号：TB332[一般工业技术—材料科学与工程]