界面层对TiC/TC4复合材料力学性能的影响  

Effect of interface layer on mechanical properties of TiC/TC4 composites

作　　者：沙云东[1,2] 耿胜彪 骆丽 SHA Yundong;GENG Shengbiaob;LUO Li(Faculty of Aerospace Engineering,Shenyang Aerospace University,Shenyang 110136,China;Liaoning Key Laboratory of Advanced Test Technology for Aerospace Propulsion System,Shenyang 110136,China)

机构地区：[1]沈阳航空航天大学航空航天工程学部,辽宁沈阳110136 [2]辽宁省航空推进系统先进测试技术重点实验室,辽宁沈阳110136

出　　处：《兵器材料科学与工程》2019年第2期100-105,共6页Ordnance Material Science and Engineering

基　　金：中航产学研创新基金(cxy2013SH17)

摘　　要：TiC/TC4复合材料在航空航天领域有广阔的应用前景,在加工制造过程中,增强体SiC纤维和Ti合金基体会发生界面反应,严重影响复合材料的宏观力学性能。为研究界面层对TiC/TC4复合材料力学性能的影响,采用正四方形RVE模型模拟复合材料细观受力情况,并进行有限元计算分析,分别研究单胞模型在4种单向载荷下的力学性能和失效载荷大小,得到复合材料的失效模式。重点研究了界面层厚度对复合材料细观模型力学性能的影响,综合考虑界面层厚度对界面结合强度值和裂纹对复合材料性能的影响,确定反应层厚度控制在1μm附近最合适,与实际制造时所选取的界面厚度区间一致,可以作为复合材料加工时界面层厚度的参考理论依据。TiC/TC4 composite materials have broad application prospects in the field of aerospace.In the manufacturing process of composite meterials,the interfacial reaction between SiC fiber and Ti alloy matrix is serious,which will seriously affect the mechanical properties of composite materials.In order to study the effect of interfacial layer on the mechanical properties of TiC/mechanical behavior of the composites.The finite element analysis was carried out.The mechanical properties and failure loads of the single cell model under four unidirectional loads were studied,and the failure modes of the composites were obtained.Then,the effect of the thickness of the interfacial layer on the mechanical properties of the micro-model of the composite was studied.Considering the influence of the thickness of the interfacial layer on the interfacial bonding strength and the crack on the properties of the composite,it is concluded that the thickness of the reaction layer should be controlled around 1μm,which is consistent with the interface thickness range selected in the actual manufacturing,and can be used as a reference for the thickness of the interface layer in composite processing.

关 键 词：界面层厚度 失效载荷 界面强度 失效模式 

分 类 号：TB331[一般工业技术—材料科学与工程]