The interfacial reactions of infrared brazing Cu and Ti with two silver-based braze alloys
Journal
Journal of Alloys and Compounds
Journal Volume
372
Journal Issue
1-2
Pages
148-157
Date Issued
2004
Author(s)
Abstract
The microstructural evolution and shear strength of the infrared brazed Cu and Ti with two silver-based braze alloys are studied. The dissolution between the molten braze and Cu substrate is much more prominent than that of Ti substrate. For specimens infrared brazed with pure Ag, the molten braze is separated into Ag-, Cu- and Ti-rich liquids. The Ag-rich liquid overflows out of the joint, so only the liquid rich in Cu and Ti is left in the joint. The joint is primarily comprised of Cu4Ti and Cu2Ti phases, and three interfacial reaction layers, CuTi2, CuTi and Cu 4Ti3 are observed after infrared brazing. For specimens infrared brazed with 72Ag-28Cu, the microstructural evolution is well elucidated by the Ag-Cu-Ti ternary alloy phase diagram, and its shear strength is strongly related to the presence of interfacial phases between Ti and the braze alloy. © 2003 Elsevier B.V. All rights reserved.
Type
journal article