Mo5Si3-boron composites fabricated by induction plasma deposition and their high-temperature oxidation resistance

Induction plasma spraying was used to produce freestanding parts of Mo5Si3- boron (Mo5Si3-B) composite materials. Four different Mo5Si3-B compositions were prepared and oxidized isothermally at 1210 degrees C in air at atmosph eric pressure. The high-temperature oxidation performance of these material s was dependent strongly on the boron content in the specimens. The composi te that contained 2.0 wt% boron exhibited excellent resistance to oxidation , as indicated by the almost-zero change in specimen mass after oxidation f or 24 h.