热轧对搅拌摩擦加工制备CNTs/Al复合材料微结构与性能的影响  

Influence of Hot Rolling on Microstructure and Properties of CNTs/Al Composites Fabricated by Friction Stir Processing

作　　者：夏春 汪云海 黄春平 邢丽 夏星 许冬 XIA Chun WANG Yunhai HUANG Chunping XING Li XIA Xing XU Dong(National Defence Key Disciplines Laboratory of Light Alloy Processing Science and Technology, Nanchang Hangkong University, Nanchang 33006)

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,南昌330063

出　　处：《材料导报》2017年第18期81-84,共4页Materials Reports

基　　金：国家自然科学基金(51465044;51364037);江西省自然科学基金(20142BAB216019);轻合金加工科学与技术国防重点学科实验室开放基金(gf201601003)

摘　　要：在搅拌摩擦加工制备碳纳米管增强铝基复合材料(CNTs/Al)的基础上,研究了热轧对复合材料微结构与性能的影响。结果表明,热轧使基体晶粒沿轧制方向拉长,同时有利于CNTs的取向并在一些CNTs-Al界面形成Al4C3相;基于CNTs取向等微结构的变化以及界面反应引起界面结合力增强的因素,沿轧制方向复合材料的抗拉强度、导电性明显提高,热膨胀率降低。The effects of hot rolling on the microstructure and properties of CNTs/Al composites fabricated by friction stir processing（FSP）were investigated.The results indicated that hot rolling was beneficial to the orientation of CNTs,and Al_4C_3 phase was formed in the interface of CNTs/Al.The matrix grain was elongated along the rolling direction at the same time.The tensile strength and electrical conductivity of the composites were significantly improved,and the coefficient of thermal expansion was reduced along the rolling direction,attributed to the changes in the orientation of CNTs and the enhancement of interfacial binding force caused by the interfacial reaction.

关 键 词：热轧 搅拌摩擦加工 CNTs/Al复合材料 微结构 性能 

分 类 号：TG146.21[一般工业技术—材料科学与工程]