Microstructure and property of AlN joint brazed with Au-Pd-Co-Ni-V brazing filler
An Au-Pd-Co-Ni-V brazing alloy was designed for AlN ceramic joining.Its wettability on AlN was studied with the sessile drop method.The results showed that the contact angle was decreased gradually with the increase of temperature and the prolonging of holding time.Sound AlN/AlN joints were achieved with the brazing alloy at 1170℃ for 10 min.The microstructure of the AlN/AlN joints was examined with 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 AlN, resulted in the formation of V-N compound.Based on the EDS and 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 + AlN + 2Pd =V2N + Pd2Al.The AlN/AlN joints brazed with the Au-Pd-Co-Ni-V brazing alloy exhibited-three-point bend strength of 162.7 Mpa at room temperature, and after the bend test the fracture of the joint occurred at the AlN ceramic substrate.
AlN brazing interfacial reaction joints
Bo Chen Huaping Xiong Yaoyong Cheng Wei Mao Shibiao Wu
Welding and Plastic Forming Division, Beijing Institute of Aeronautical Materials, Beijing 100095, China
国内会议
西安
英文
165-170
2016-10-10（万方平台首次上网日期，不代表论文的发表时间）