Mo ₅ Si ₃ ‐Boron Composites Fabricated by Induction Plasma Deposition and Their High‐Temperature Oxidation Resistance

Induction plasma spraying was used to produce freestanding parts of Mo ₅ Si ₃ ‐boron (Mo ₅ Si ₃ ‐B) composite materials. Four different Mo ₅ Si ₃ ‐B compositions were prepared and oxidized isothermally at 1210°C in air at atmospheric pressure. The high‐temperature oxidation performance of these materials was dependent strongly on the boron content in the specimens. The composite that contained 2.0 wt% boron exhibited excellent resistance to oxidation, as indicated by the almost‐zero change in specimen mass after oxidation for 24 h.