A self-passivating W-Si-Y alloy was prepared by spark plasma sintering, while the microstructure evolution and oxidation mechanism at 1000 °C were analyzed. The alloy exhibits excellent oxidation resistance due to the introduction of Y. At high temperatures, Y enriches on the surface of the oxide scale, and a melt mainly containing W, Y and O is formed. The melt can close the pores on the surface of loose oxide layer to form a dense protective layer, which not only prevents oxygen from permeating into the alloy, but also alleviates the sublimation of WO₃.

中文翻译：

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自钝化 W-Si-Y 合金：高温下的显微组织和抗氧化性能

采用放电等离子烧结法制备了一种自钝化W-Si-Y合金，并分析了其在1000℃下的微观结构演变和氧化机理。由于Y的引入，该合金表现出优异的抗氧化性。在高温下，Y在氧化皮表面富集，形成以W、Y和O为主的熔体。熔体可以封闭松散氧化层表面的气孔，形成致密的保护层，既防止氧气渗入合金，又减轻了WO ₃的升华。