Mechanism of Nb enhancing oxidation resistance of Mn-containing γ-TiAl alloy during cyclic oxidation at 800℃

IF 2.7 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Letters Pub Date : 2025-03-20 DOI:10.1016/j.matlet.2025.138437

Hao Liang , Peng Xue , Xiaoling Fu , Kun Lin , Junjie Hao , Xiaobing Li , Jiyou Zhong , Bo Chen , Kui Liu

引用次数: 0

Abstract

Effect of Nb addition on oxidation resistance during cyclic oxidation at 800 °C of a Mn-containing γ-TiAl alloy was explored. Nb addition reduces the oxidation reaction rate constant and thus enhances the oxidation resistance. Density functional theory calculations and experiments show that Nb stabilizes Ti(Mn, Al)₂ Laves phase in the intermediate layer, and results in the disappearance of Z phase and then lower crack nucleation tendency. Nb enriched in the intermediate layer could replenish the consumption during oxidation and then inhibit rapid oxygen diffusion.

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来源期刊

Materials Letters 工程技术-材料科学：综合

CiteScore

5.60

自引率

3.30%

发文量

1948

审稿时长

50 days

期刊介绍： Materials Letters has an open access mirror journal Materials Letters: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. Materials Letters is dedicated to publishing novel, cutting edge reports of broad interest to the materials community. The journal provides a forum for materials scientists and engineers, physicists, and chemists to rapidly communicate on the most important topics in the field of materials. Contributions include, but are not limited to, a variety of topics such as: • Materials - Metals and alloys, amorphous solids, ceramics, composites, polymers, semiconductors • Applications - Structural, opto-electronic, magnetic, medical, MEMS, sensors, smart • Characterization - Analytical, microscopy, scanning probes, nanoscopic, optical, electrical, magnetic, acoustic, spectroscopic, diffraction • Novel Materials - Micro and nanostructures (nanowires, nanotubes, nanoparticles), nanocomposites, thin films, superlattices, quantum dots. • Processing - Crystal growth, thin film processing, sol-gel processing, mechanical processing, assembly, nanocrystalline processing. • Properties - Mechanical, magnetic, optical, electrical, ferroelectric, thermal, interfacial, transport, thermodynamic • Synthesis - Quenching, solid state, solidification, solution synthesis, vapor deposition, high pressure, explosive