Abstract Oxidation behavior and thermal stability of a β-solidifying γ-TiAl alloy after plasma source nitrogen ion implantation were studied. Nano-sized TiN, Ti2N, Ti3AlN, and Ti3Al2N2 particles were found in the modified layer. The microhardness of the modified layer was 2.5 times higher than that of the as-cast condition. Nitrogen ion implantation increased the oxidation resistance significantly in comparison to the as-cast condition. Thin inner and outer TiO2, dense protective Al2O3 and fine-grained mixed Al2O3+TiO2 layers were found on the surface after oxidation. The effect of nitrogen ion implantation on phase stability and oxidation mechanisms is analyzed.

中文翻译：

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氮离子注入后β凝固γ-TiAl基合金的抗氧化性和热稳定性

摘要 研究了等离子源氮离子注入后β凝固γ-TiAl合金的氧化行为和热稳定性。在改性层中发现了纳米尺寸的 TiN、Ti2N、Ti3AlN 和 Ti3Al2N2 颗粒。改性层的显微硬度是铸态的 2.5 倍。与铸态条件相比，氮离子注入显着提高了抗氧化性。氧化后在表面发现薄的内外TiO2、致密的Al2O3保护层和细粒Al2O3+TiO2混合层。分析了氮离子注入对相稳定性和氧化机制的影响。