BRAZING OF ALUMINA WITH TI4CU2O AND TI3CU3O INTERLAYERS

The joining of alumina with the compounds Ti4Cu2O and Ti3Cu3O, which a re normally found as reaction products in conventional active metal br azing, has been demonstrated. The final phase assemblages correspond t o those expected based on the Ti-Cu-O ternary phase diagram. No cavita tion is observed at the interfaces in the final microstructure. While the samples are robust under normal handling, many joints failed durin g preparation of mechanical test specimens and those few that remained exhibited very low four-point bend strengths. (C) 1997 Elsevier Scien ce B.V.