Abstract
Induction plasma-spray processing was used to produce free-standing parts of Mo5Si3-B composite and MoSi2 materials. The oxidation resistance, up to 1210 °C, of the Mo5Si3-B composite was compared with MoSi2, which is known to be resistant to high-temperature oxidation. The deposits were oxidized isothermally in air at atmospheric pressure. The structural performance of these materials under high-temperature oxidation conditions was found to depend on the boron content in the specimens. In particular, the composite containing 2 wt.% boron exhibited excellent resistance to oxidation, as indicated by the specimen mass change, which was found to be near zero after the 24 h oxidation test.
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