成型温度对SiC_(f)/Ti60复合材料拉伸行为的影响  

Effect of Forming Temperature on the Tensile Behavior of SiC_(f)/Ti60 Composite

作　　者：孟凡玲[1] 宋永青 张旭[2] 王玉敏[2] MENG Fanling;SONG Yongqing;ZHANG Xu;WANG Yumin(Shenyang Ligong University,Shenyang 110159,China;Light and High Strength Materials,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China)

机构地区：[1]沈阳理工大学材料科学与工程学院,沈阳110159 [2]中国科学院金属研究所轻质高强材料研究部,沈阳110016

出　　处：《沈阳理工大学学报》2023年第4期79-86,共8页Journal of Shenyang Ligong University

基　　金：国家科技重大专项(HT-J2019-VI-0007-0121)。

摘　　要：采用磁控溅射技术结合热等静压工艺制备SiC_(f)/Ti60复合材料,研究成型温度对SiC_(f)/Ti60复合材料室温和高温拉伸性能的影响规律,并分析其断裂机制。结果表明:SiC_(f)/Ti60复合材料室温拉伸强度随成型温度升高而降低,高温拉伸强度与成型温度关系不明显;拉伸载荷作用下材料的主要断裂特征表现为“纤维桥连”,呈现网络状的基体裂纹分布特征;复合材料损伤首先发生在反应层,裂纹萌生后扩展进入基体,基体断裂发生在纤维断裂之前,复合材料芯完全失效后包套断裂。SiC_(f)/Ti60 composites are prepared by magnetron sputtering technology combined with hot isostatic pressing process,the tensile properties and fracture mechanism of SiC_(f)/Ti60 composites are studied,especially the influences of HIP forming temperature and test temperature on the tensile behavior are revealed.The results show that the tensile strength at room temperature decreases with the increase of HIP forming temperature,but there is no obvious relationship between the tensile strength and HIP forming temperature.Under tensile loading,“fiber-bridging”is the most typical fracture mechanism of this composite,and the matrix cracks show in the form of network.The cracks first appear in the interfacial reaction layer and then propagate into the matrix.In general,the failure of matrix happens before the fracture of fiber,and the failure of the canning occurs after the fracture of composite core.

关 键 词：钛基复合材料 SIC纤维 拉伸行为 断裂机制 

分 类 号：TG146.23[一般工业技术—材料科学与工程]