Characterization,Removal and Evaluation of Oxide Film in the Diffusion Bonding of Zr55Cu30Ni5Al10 Bulk Metallic Glass
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2014年第7期
论文作者：Haiyan Chen Jian Cao Xiaoguo Song Jiakun Liu Jicai Feng
文章页码：722 - 730
摘 要：The composition of oxide film of Zr55Cu30Ni5Al10 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.
Haiyan Chen1，Jian Cao1，Xiaoguo Song2，Jiakun Liu1，Jicai Feng1,2
1. State Key Lab of Advanced Welding and Joining,Harbin Institute of Technology2. School of Materials Science and Engineering,Harbin Institute of Technology at Weihai
摘 要：The composition of oxide film of Zr55Cu30Ni5Al10 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.
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