Copper foils with gradient structure in thickness direction and different roughnesses on two surfaces fabricated by double rolling

作     者：Xi-yong Wang Xue-feng Liu Wen-jiang Zou Jian-xin Xie 

作者机构：School of Materials Science and EngineeringUniversity of Science and Technology Beijing Beijing Laboratory of Metallic Materials and Processing for Modern TransportationUniversity of Science and Technology Beijing Key Laboratory for Advanced Materials Processing Ministry of Education)University of Science and Technology Beijing 

出 版 物：《International Journal of Minerals,Metallurgy and Materials》 (矿物冶金与材料学报（英文版）)

年 卷 期：2013年第20卷第12期

页      面：1170-1175页

核心收录：

学科分类：0709[理学-地质学] 0819[工学-矿业工程] 081704[工学-应用化学] 07[理学] 08[工学] 070301[理学-无机化学] 0806[工学-冶金工程] 0817[工学-化学工程与技术] 0708[理学-地球物理学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0802[工学-机械工程] 0702[理学-物理学] 0801[工学-力学（可授工学、理学学位）] 

基　　金：financially support by the National Key Technology Research and Development Program of the Ministry of Science and Technology of China (No.2011BAE23B02) the Fundamental Research Funds for the Central Universities of China (No.FRF-TP-10-002B) 

主　　题：copper foils rolling surfaces gradient structure fatigue of materials 

摘      要：Copper foils with gradient structure in thickness direction and different roughnesses on two surfaces were fabricated by double rolling. The two surface morphologies of double-rolled copper foils are quite different, and the surface roughness values are 61 and 1095 nm, respectively. The roughness value of matt surface can meet the requirement for bonding the resin matrix with copper foils used for flexible printed circuit boards, thus may omit traditional roughening treatment; the microstructure of double-rolled copper foils demonstrates an obviously asymmetric gradient feature. From bright surface to matt surface in thickness direction, the average grain size first increases from 2.3 to 7.4 μm and then decreases to 3.6 μm; compared with conventional rolled copper foils, the double-rolled copper foils exhibit a remarkably increased bending fatigue life, and the increased range is about 16.2%.