Abstract
The development of robust high temperature oxidation resistant coatings for tungsten was evaluated for a Mo–Si–B coating system that was applied by a two step process. The synthesized coating shows a graded structure composed of various amounts of molybdenum and tungsten disilicide as well as an aluminoborosilica top layer. Oxidation tests conducted at 1100–1400°C demonstrate that the coating provides effective oxidation protection for tungsten. Furthermore, the Mo–Si–B coatings provide an enhanced oxidation resistance compared to that for W–Si–B-coatings or WSi2 coatings.
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