Microstructure and Property of AlN Joint Brazed with Au–Pd–Co–Ni–V Brazing Filler

作     者：Bo Chen Huaping Xiong Yaoyong Cheng Wei Mao Shibiao Wu 

作者机构：Welding and Plastic Forming DivisionBeijing Institute of Aeronautical Materials 

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

年 卷 期：2015年第31卷第10期

页      面：1034-1038页

核心收录：

学科分类：080503[工学-材料加工工程] 0817[工学-化学工程与技术] 0806[工学-冶金工程] 08[工学] 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] 0801[工学-力学（可授工学、理学学位）] 0702[理学-物理学] 080201[工学-机械制造及其自动化] 

基　　金：sponsored by the National Natural Science Foundation of China (Nos. 59905022, 50475160, 51275497 and 51410105004) the Aeronautical Science Foundation of China (No. 2008ZE21005) 

主　　题：AIN Brazing Interracial reaction Joints 

摘      要：An Au-Pd-Co-Ni-V brazing alloy was designed for AIN ceramic joining. Its wettability on AIN was studied with the sessile drop method. The results showed that the contact angle was decreased gradu- ally with increasing temperature and the prolonging of holding time. Sound AIN/AIN joints were achieved with the brazing alloy at 1170 ℃ for 10 min. The microstructure of the AIN/AIN joints was examined by scanning electron microscopy （SEM）. It was found that element V played the active role in the interfacial reaction between the ceramic and the brazing alloy, V reacted with N decomposed from AIN, resulted in the formation of V-N compound. Based on the energy-dispersive spectroscopy （EDS） and X-ray diffraction （XRD） analysis results, the V-N reaction product was verified as V2N. The overall reaction during the brazing process can be described by the following equation： 2V ＋ AIN ＋ 2Pd = V2N ＋ Pd2AI. The AIN/AIN joints brazed with the Au-Pd-Co-Ni-V brazing alloy exhibited three-point bend strength of 162.7 MPa at room temperature, and under the bend test the fracture of the joint occurred at the AIN ceramic substrate.