Achieving a crackless, abrasion- and corrosion-resistant oxide coating on Ti-Zr-Hf-Nb-Al-Y refractory high-entropy alloy through Y alloying and high-temperature fast oxidation

IF 5.3 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS

Surface & Coatings Technology Pub Date : 2025-02-05 DOI:10.1016/j.surfcoat.2025.131882

Nengbin Hua , Rui Wang , Zhongya Qian , Rongpei Shi , Da Zeng , Xiongwei Liang , Xinxiong Xiao , Hanxin Lin , Wenfei Lu , Jun Shen , Peter K. Liaw

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引用次数: 0

Abstract

High-temperature oxidation is a facile technique to fabricate a wear- and corrosion-resistant oxide coating for metals. However, TiZrHfNb-based refractory high-entropy alloys (RHEAs) are prone to suffer from surface cracking during high-temperature oxidation processes, which is a common outcome observed in the high-temperature oxidation behavior of titanium alloys. This study introduces a novel approach to mitigate high-temperature oxidation cracking in the TiZrHfNbAl_0.5 RHEA by leveraging the synergistic effects of Y-alloying and precise oxidation control. It's found that surface cracking observed in the TiZrHfNbAl_0.5 RHEA following oxidation at 1000 °C is primarily attributed to the formation of needle-like (ZrHf)O₂ within the oxide layer. By combining Y-doping and an oxidation treatment at 1000 °C for 8 min, the generation of (ZrHf)O₂ is effectively suppressed, while a dispersion Y-Al-rich oxides is promoted, thereby creating a pinning effect that results in the formation of a crack-free oxide coating. Consequently, the oxidized TiZrHfNbAl_0.5Y_0.1 RHEA exhibits a wear rate that is two orders of magnitude lower and a corrosion current density that is one order of magnitude lower than those of the Ti6Al4V (wt%) alloy. A systematic analysis is also carried out to elucidate the oxidation mechanism underpinning this exceptionally wear- and corrosion-resistant RHEA. The present work offers new possibilities for the industrial applications of RHEAs in abrasive and corrosive environments.

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来源期刊

Surface & Coatings Technology 工程技术-材料科学：膜

CiteScore

10.00

自引率

11.10%

发文量

921

审稿时长

19 days

期刊介绍： Surface and Coatings Technology is an international archival journal publishing scientific papers on significant developments in surface and interface engineering to modify and improve the surface properties of materials for protection in demanding contact conditions or aggressive environments, or for enhanced functional performance. Contributions range from original scientific articles concerned with fundamental and applied aspects of research or direct applications of metallic, inorganic, organic and composite coatings, to invited reviews of current technology in specific areas. Papers submitted to this journal are expected to be in line with the following aspects in processes, and properties/performance: A. Processes: Physical and chemical vapour deposition techniques, thermal and plasma spraying, surface modification by directed energy techniques such as ion, electron and laser beams, thermo-chemical treatment, wet chemical and electrochemical processes such as plating, sol-gel coating, anodization, plasma electrolytic oxidation, etc., but excluding painting. B. Properties/performance: friction performance, wear resistance (e.g., abrasion, erosion, fretting, etc), corrosion and oxidation resistance, thermal protection, diffusion resistance, hydrophilicity/hydrophobicity, and properties relevant to smart materials behaviour and enhanced multifunctional performance for environmental, energy and medical applications, but excluding device aspects.