中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
Vol. 15 No. 5 October 2005 |
(State Key Laboratory of Advanced Welding Production Technology,
Harbin Institute of Technology, Harbin 150001, China)
Abstract: 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 172MPa when the vibration time is 30s. 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.
Key words: SiCp/ZL101A; diffusion bonding; vibration; interface structure; oxide film