ABSTRACT Endogenetic particles TiB2 (5 and 10 vol.-%)-reinforced NiAl matrix composites were fabricated in-situ from Ti–B–Ni–Al system by arc melting. The oxidation behaviour and anti-oxidant mechanism of TiB2–NiAl composite were investigated at 1173 K in air atmosphere. The composite had a rapid rate of oxidation during the first 20 h. With the increase in oxidation time, α-Al2O3 oxidation films and needle-shaped TiO2 phases were formed on the surface of the composite. As the Al oxidised into Al2O3, the NiAl phase transformed into γ-Ni3Al phase. The oxides were beneficial for improving the oxidation resistance of the composite. The mass change of the composite was less than 2.5 mg cm−2 after being oxidised at 1173 K in air atmosphere for 100 h. The composite showed excellent high-temperature oxidation resistance.

中文翻译：

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电弧熔炼原位 TiB2-NiAl 复合材料：氧化行为、氧化动力学和氧化机理

摘要 内生颗粒 TiB2（5 和 10 vol.-%）增强的 NiAl 基复合材料是通过电弧熔化由 Ti-B-Ni-Al 系统原位制造的。研究了 TiB2-NiAl 复合材料在 1173 K 空气气氛中的氧化行为和抗氧化机制。在最初的 20 小时内，复合材料的氧化速度很快。随着氧化时间的增加，复合材料表面形成了α-Al2O3氧化膜和针状TiO2相。随着 Al 氧化成 Al2O3，NiAl 相转变为 γ-Ni3Al 相。氧化物有利于提高复合材料的抗氧化性。复合材料在 1173 K 空气中氧化 100 小时后，其质量变化小于 2.5 mg cm-2。该复合材料表现出优异的高温抗氧化性。