Diffusion Welding of Al-α-Si3N4 Composite Materials
No Thumbnail Available
Date
2020
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
In this study, Al--Si3N4 composite, produced by powder metallurgy method, were joined at 2.5 MPa pressure with various weldingtemperatures (620, 630, and 640 °C) and durations (1,1.5, and 2 h.) by diffusion welding method. Optical microscopy examinationwas carried out from welded interfaces and shear tests were also conducted to the sample interfaces to find out the effect of weldingparameters and amount of α-Si3N4 reinforcement on the weldability properties of composite materials. The test results show thatincrease in the welding temperature and duration resulted in increase shear resistance of the welded zone. Results indicated thatoptimum parameters (welding temperatures, durations and amount of α-Si3N4 are 640 °C, 2 h., and 15wt % respectively) MMCsproduced in this study could be joined by diffusion welding technique successfully with the 97.5 % strength of base material.