Bonding of Al2O3 ceramic and Nb using transient liquid phase brazing
来源期刊：中国有色金属学报(英文版)2004年第1期
论文作者：于治水 梁超 李瑞峰 吴铭方 祁凯
文章页码：99 - 104
Key words：Al2O3 ceramic; Nb; transient liquid phase bonding
Abstract: The brazing of Al2O3 to Nb was achieved by the method of transient liquid phase (TLP) bonding. Ti foil and Ni-5V alloy foil were used as interlayers for the bonding. The base materials were brazed at 1 423-1 573 K for 1 120 min. The results show that the shear strength of the joint first increases and then decreases with increasing holding time and brazing temperature. The joint interface microstructure and elements distribution were investigated. It can be concluded that a composite structure, in which the base metals are solid solution Nb(V) and Nb(Ti) reinforced by Ni2Ti, is formed when the brazing temperature is 1 473 K and holding time 15 min, and a satisfactory joint strength can be achieved. The interaction of Ti foil and Ni-5V foil leads to the formation of liquid eutectic phase with low melting point, at the same time the combination of Ti come from the interlayer with O atoms from Al2O3 results in the bonding of Al2O3 and Nb.
