SiC_(f)/Ti65复合材料的拉伸行为研究

Study on Tensile Behavior of SiC_(f)/Ti65 Composites

采用磁控溅射先驱丝法结合热等静压工艺制备SiC_(f)/Ti65复合材料,研究了SiC_(f)/Ti65复合材料室温、高温拉伸行为,揭示了SiC_(f)/Ti65复合材料拉伸断裂机制。研究结果表明:SiC_(f)/Ti65复合材料的室温、高温抗拉强度相比于Ti65合金的抗拉强度分别提升29%和164%,验证了复合材料的增强效果。SiC_(f)/Ti65复合材料的室温拉伸断裂机制为反应层断裂、纤维/基体界面脱粘、基体脆性断裂、纤维断裂、包套韧性断裂;高温断裂机制为反应层断裂、纤维/基体界面脱粘、纤维断裂、W/SiC界面脱粘、基体和包套韧性断裂。

SiC_(f)/Ti65 composite was prepared by magnetron sputtering precursor wire method combined with thermal isostatic pressure process,the tensile behavior of SiC_(f)/Ti65 composite chamber at room temperature and high temperature was studied,and the tensile fracture mechanism of the composite was reveled.The results show that the room temperature and high temperature tensile strengths of the composite are 29%and 164%higher than those of Ti65 alloy,respectively.The enhancement effect of the composite material is verified.The room temperature tensile fracture mechanism of the composite is reaction layer fracture,fiber/matrix interface debond,matrix brittle fracture,fiber fracture and sheath toughness fracture;the high temperature fracture mechanism is reaction layer fracture,fiber/matrix interface debond,fiber fracture,W/SiC interface deadhesion,matrix and sheath toughness fracture.