Diffusion Welding of Al-α-Si3N4 Composite Materials

Year 2020, Volume: 23 Issue: 2, 497 - 503, 01.06.2020

Halil Arık İbrahim Okan Erden Mustafa Aydın

https://doi.org/10.2339/politeknik.524988

Abstract

ABSTRACT

In this study, Al-a-Si₃N₄
composite, produced by powder metallurgy method, were joined at 2.5 MPa
pressure with various welding temperatures (620, 630, and 640 °C ) and
durations (1,1.5, and 2 h.) by diffusion welding method. Optical microscopy
examination was carried out from welded interfaces and shear tests were also conducted
to the sample interfaces to find out the effect of welding parameters and
amount of α-Si₃N₄ reinforcement on
the weldability properties of composite materials. The test results show that
increase in the welding temperature and duration resulted in increase shear
resistance of the welded zone. Results indicated that optimum parameters
(welding temperatures, durations and amount of α-Si₃N₄
are 640°C, 2 h., and 15wt % respectively) MMCs produced in this study could be
joined by diffusion welding technique successfully with the 97.5 % strength of
base material.

Keywords

Composite, Al-Si3N4, Diffusion welding, Shear strength

References

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