Microstructure and oxidation behaviour of Y-added Mo-Ti-Si-B alloys
Source abstract
Abstract
Microstructure and oxidation behaviour of multi-phase Mo-Ti-Si-B alloys with 0.2–1.0 at% Y addition were investigated in this study. In addition to Mo ss, Ti 5Si 3, and Mo 5SiB 2 , a Y-rich intermetallic compound, YTiSi, was found to generate in Y-added alloys. With increasing Y-content, microstructure coarsening and increase in Mo ss volume fraction took place. Y-addition significantly improved the oxidation resistance of the alloys at 800 °C due to the formation of a thermally stabilized Y 2Mo 3O 12 layer. However, the positive effect of Y-addition cannot be maintained at 1100 °C because of the decomposition of yttrium molybdates during long-term oxidation.
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Research context
OpenAlex topics: Intermetallics and Advanced Alloy Properties · Advanced materials and composites · Advanced ceramic materials synthesis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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