Mo-Based Composites Reinforced with Nb, Si, and B by Metallothermic SHS under Artificial Gravity
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Composite materials (CMs) reinforced with Nb, Si, and B have high potential for turbo-engine applications . Mo–Si-based composites are used in hot sections of gas turbines since the addition of Mo and Si to Mo-based composites leads to the formation of dense borosilicate glass that protects CM against oxidation.
Earlier, Mo-based solid solution with Mo3Si and/or Mo5SiB2 inclusions was fabricated from Mo–Si–B mixtures by powder metallurgy method  and showed high resistance to creep and oxidation . Recently, dense Mo–3Nb–9Si–8B alloy (m.p. > 1950°C) was prepared by hot isostatic pressing . Other methods for fabrication of CMs and items thereof involve casting, directed crystallization, additive technologies [1, 4], and SHS metallurgy .
This work aimed at the preparation of Mo-based composites reinforced with Nb, Si, and B by metallothermic SHS in conditions of artificial gravity.
Using thermite mix 1 and elemental mix 2 (all figures in wt %),
mix 1: MoO3 68.9, Nb2O52.4,...
Keywords:combustion synthesis centrifugal SHS metallothermy Mo-based composites
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