Interface structure and formation mechanism of vacuum-free vibration liquid phase diffusion-bonded joints of SiC_p/ZL101A composites  

作　　者：闫久春 许惠斌 许志武 李大成 杨士勤 

机构地区：[1]State Key Laboratory of Advanced Welding Production Technology, Harbin Institute of Technology, Harbin 150001, China

出　　处：《中国有色金属学会会刊：英文版》2005年第5期993-996,共4页Transactions of Nonferrous Metals Society of China

基　　金：Project(50375039)supportedbytheNationalNaturalScienceFoundationofChina

摘　　要：The vacuum-free vibration liquid phase(VLP) diffusion-bonding of SiC_p/ZL101A composites was investigated. The effects of vibration on the interface structure, the phase transformation and the tensile strength of bonded joints were examined. Experimental results show that the oxide film on the surface of the composites is a key factor affecting the tensile strength of boned joints. The distribution of the oxide layers at the interface changes from a continuous line to a discontinuous one during vibration. The tensile strength of the VLP diffusion-bonded joints increases with the vibration time, and is up to the maximum of 172MPa when the vibration time is 30s. The phase structure of the bond region changes from the Zn-Al-Cu hyper-eutectic (η+(β+η)+(β+η+ε)) phases to Al-rich Al-base solid solution (α-Al) with increasing the vibration time.The vacuum-free vibration liquid phase（VLP） diffusion-bonding of SiCp/ZL101A composites was investigated. The effects of vibration on the interface structure, the phase transformation and the tensile strength of bonded joints were examined. Experimental results show that the oxide film on the surface of the composites is a key factor affecting the tensile strength of boned joints. The distribution of the oxide layers at the interface changes from a continuous line to a discontinuous one during vibration. The tensile strength of the VLP diffusion-bonded joints increases with the vibration time, and is up to the maximum of 172 MPa when the vibration time is 30 s. The phase structure of the bond region changes from the Zn-Al-Cu hyper-eutectic （η＋ （β＋ η） ＋ （β＋ η＋ ε）） phases to Al-rich Al-base solid solution （α-Al） with increasing the vibration time.

关 键 词：氧化膜 液体振动相 焊接工艺 加压焊 复合材料 界面结构 

分 类 号：TG497[金属学及工艺—焊接]