TITLE:
Joining of SiC Ceramics by the Flash-Bonding Technique
AUTHORS:
Takuro Yoshitake, Yoshio Ohta, Mikito Kitayama
KEYWORDS:
Silicon Carbide, Joining, Flash-Bonding, Borosilicate Glass
JOURNAL NAME:
Journal of Materials Science and Chemical Engineering,
Vol.8 No.3,
March
13,
2020
ABSTRACT: Because Silicon carbide (SiC) ceramics have various excellent properties, the demand for larger and complicated shapes has been increasing. This paper introduces an innovative method that would not require a large furnace, and further, would minimize the production cost and the thermal history, namely the “flash-bonding” technique. The borosilicate glass with low thermal expansion coefficient, Pyrex glass, was selected as the brazing material. In this work, as-is or surface-oxidized SiC plates were joined using Pyrex glass as brazing material, and the reaction and wetting of Pyrex glass on as-is or surface-oxidized SiC plate were investigated. It was found that the protective film of the surface-oxidized SiC lowered the oxygen partial pressure, and hence, generated many pores in the interface.