Influence of minor Fe addition on the oxidation performance of Mo–Si–B alloys

Multiphase Mo–Si–B alloys composed of Mo, Mo3Si and Mo5SiB2 phases offer excellent high-temperature mechanical properties with the ability to resist oxidation via production of a borosilica surface layer. In the current study the effects of Fe addition were examined on the oxidation performance of Mo–2Si–1B and Mo–3Si–1B (wt.%) alloys. The analysis of the results indicated that the Fe addition limits the initial oxidation stage appreciably, primarily by enhancing the fluidity of the borosilica.