Joining of Al-plasma-sprayed Si3N4ceramics
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Aluminium was coated on silicon nitride ceramics by a low-pressure plasma spraying method, in order to form a tight bond between aluminium and the ceramics. Aluminium nitride formed as a interfacial reaction product between the aluminium coating layer and the ceramics. Two pieces of the aluminium-coated Si3N4 ceramics were then joined using the aluminium coating layers as filler metal in a vacuum of 1.3×10−3 Pa at 973 K. The average bending strength and Weibull modulus of the joint are 340 MPa and 6.3 respectively, considerably higher than the 230 MPa and 0.9 of a Si3N4 ceramics joint brazed with an aluminum plate under the same condition.
KeywordsPolymer Aluminium Silicon Nitride Material Processing
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- 7.Y. Arata, A. Ohmori and S. Sano, Trans. J. Weld. Res. Inst. 14 (1985) 284.Google Scholar