纤维预热温度对2.5D-C_f/Al复合材料致密度和强度的影响  

Effect of Fiber Preheating Temperature on the Density and Tensile Strength of 2.5D-C_f/Al Composites Fabricated by Vacuum Pressure Infiltration Process

作　　者：袁秀妹[1] 余欢[1] 王振军[1] 徐志锋[1] 朱世学[1] 

机构地区：[1]南昌航空大学轻合金加工科学与技术国防重点学科实验室

出　　处：《特种铸造及有色合金》2016年第3期278-282,共5页Special Casting & Nonferrous Alloys

基　　金：国家自然科学基金资助项目(51365043);江西省自然科学基金资助项目(20151BAB206004);轻合金加工科学与技术国防重点学科实验室;航空材料热加工技术航空科技重点实验室联合资助项目(GF201101004)

摘　　要：以石墨纤维2.5D织物为增强体,ZL301铝合金为基体,采用真空气压浸渗法制备了碳纤维体积分数为42%的2.5D-C_f/ZL301复合材料,研究了纤维预热温度对复合材料致密度和力学性能的影响。结果表明,随着纤维预热温度的升高,2.5D-C_f/Al复合材料的致密度呈现先增加后减少的趋势;而复合材料室温抗拉强度随纤维预热温度提高而持续下降,这是因界面反应加剧而导致的界面结合过强而导致的复合材料力学性能恶化。2.5D-C_f/Al composites with 2.5Dgraphite fiber as reinforcement and ZL301 as matrix alloy were fabricated by the vacuum pressure infiltration method.The effects of fiber preheating temperature on the relative density and tensile strength of 2.5D-C_f/Al composites were investigated.The results show that the distribution of M40 fiber reunited in the matrix tends to be more uniform,while the relative density is increased firstly and then decreased,the tensile strength of the composites is decreased with the increase of fiber preheating temperature.The high interface strength induced by excessive interfacial reaction at high fiber preheating temperature may damage the fiber strength as well as leading to brittle fracture during the tensile loading process.

关 键 词：2.5D-Cf/Al复合材料 真空气压浸渗 纤维预热温度 致密度 

分 类 号：TB333[一般工业技术—材料科学与工程]