Characterization,Removal and Evaluation of Oxide Film in the Diffusion Bonding of Zr_(55)Cu_(30)Ni_5Al_(10) Bulk Metallic Glass

作     者：Haiyan Chen Jian Cao Xiaoguo Song Jiakun Liu Jicai Feng 

作者机构：State Key Lab of Advanced Welding and JoiningHarbin Institute of Technology School of Materials Science and EngineeringHarbin Institute of Technology at Weihai 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2014年第30卷第7期

页      面：722-730页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：financially supported by the National Natural Science Foundation of China(Grants Nos.51275133 and 51021002) 

主　　题：Bulk metallie glass Diffusion Surface Diffusion bonding Oxide film 

摘      要：The composition of oxide film of ZrssCu3oNi5Al10 bulk metallic glass was identified by X-ray photoelectron spectroscopy. In addition, the relatively sound joints of bulk metallic glass without macroscopic deformation were obtained by removing the oxide film before diffusion bonding. The joint interfaces were observed by scanning electron microscopy and atomic force microscopy. The hardness of joints near the interface was higher than that far away from the interface, which is attributed to the difference of structural relaxation. According to the result of micro-focused X-ray diffractometry and transmission electron microscopy, the joints retained the amorphous structure when the holding time is less than 20 min. The surface area fraction of oxide film on the interface of joints was detected by ultrasonic inspection. Moreover, the surface area fraction of oxide film is in excellent agreement with the theoretical value calculated by shear strength. The result indicated that surface oxide film is the dominant barrier on the diffusion bonding of bulk metallic glass rather than low atomic diffusion coefficient.