中國有色金屬學(xué)報(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 14 No. 1 February 2004 |
liquid phase brazing①
WU Ming-fang(吳銘方), QI Kai(祁 凱)
（Department of Materials Science and Engineering, East China Shipbuilding Institute, Zhenjiang 212003, China）
Abstract:The brazing of Al2O3to 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 Al2O3results in the bonding of Al2O3 and Nb.
Key words: Al2O3ceramic; Nb; transient liquid phase bonding
