EFFECT OF THE ALUMINUM CONTENT AND MECHANICAL ACTIVATION ON SYNTHESIS IN TI-SI-AL
N. A. Kochetov
Merzhanov Institute of Structural Macrokinetics and Materials Science, Russian Academy of Sciences, Chernogolovka, Russia
Keywords: combustion, mechanical activation, Ti-Si-Al, combustion temperature, phase composition of products
Abstract
The synthesis process was realized in activated mixtures 5Ti + 3Si + xAl (x= 0 ÷ 40%) and in the initial mixture 5Ti + 3Si + 10%Al. The effect of mechanical activation and aluminum content on the rate and maximum combustion temperature, morphology, elongation, integrity, and phase composition of combustion products have been studied. Mechanical activation expanded the limit of Al content to 40%, at which it is possible to realize the combustion of samples without preheating. Based on the Ti-Si-Al system, intermetallic alloys - solid solutions based on titanium silicide Ti(Si0.75Al0.25)2 and based on aluminide titanium Ti(Al0.9Si0.1)3.
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