In this study, plasma sprayed ceramic coatings with different amounts of SiC and MoSi2 particles dispersed in a ZrB2 matrix were produced and tested. The results show that MoSi2 addition in ZrB2-SiC samples improves high-temperature oxidation resistance without affecting mechanical properties. Demonstrative components were manufactured and tested in simulated operating conditions by means of a plasma wind tunnel. Preliminary results indicate that thermal sprayed ceramics are well suited for use in space re-entry vehicles.

high-temperature oxidation resistance, molybdenum disilicide particles, plasma spraying, space vehicles, zirconium diboride-based coatings
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Copyright © 2009 ASM International. All rights reserved.
2009
ASM International
Topics
Space vehicles Refractory ceramics Plasma spray coating Oxidation resistance Simulated service testing
Issue Section:
Applications and Case Studies
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