Al含量对(CoCrNi)96-xTa4Alx(x=3,6,12)高熵合金抗氧化行为与氧化动力学的影响

doi:10.13251/j.issn.0254-6051.2024.10.037

金属热处理 ›› 2024, Vol. 49 ›› Issue (10): 226-233.DOI: 10.13251/j.issn.0254-6051.2024.10.037

Al含量对(CoCrNi)_96-xTa₄Al_x(x=3,6,12)高熵合金抗氧化行为与氧化动力学的影响

汤泉¹, 仝永刚¹, 胡永乐¹, 杨玲伟², 邓吨英³

1.长沙理工大学汽车与机械工程学院, 湖南长沙 410114;
2.中国空气动力研究与发展中心, 四川绵阳 621000;
3.长沙理工大学材料科学与工程学院, 湖南长沙 410114

收稿日期:2024-05-08 修回日期:2024-08-16 出版日期:2024-11-28 发布日期:2024-11-28
通讯作者: 仝永刚,副教授,博士,E-mail: tongyonggang_csust@163.com
作者简介:汤泉(1998—),男,硕士研究生,主要研究方向为高性能金属材料,E-mail: 179412906@qq.com。
基金资助:
国家自然科学基金(92166105,52005053);湖南省科技创新计划(2021RC3096);湖南省自然科学基金(2023JJ30038);湖南省教育厅科学研究项目(23A0264)

Effect of aluminium content on antioxidant behaviour and oxidation kinetics of (CoCrNi)_96-xTa₄Al_x(x=3, 6, 12) high entropy alloy

Tang Quan¹, Tong Yonggang¹, Hu Yongle¹, Yang Lingwei², Deng Dunying³

1. School of Automotive and Mechanical Engineering, Changsha University of Science and Technology, Changsha Hunan 410114, China;
2. China Aerodynamics Research and Development Center, Mianyang Sichuan 621000, China;
3. School of Materials Science and Engineering, Changsha University of Science and Technology, Changsha Hunan 410114, China

Received:2024-05-08 Revised:2024-08-16 Online:2024-11-28 Published:2024-11-28

摘要/Abstract

摘要： 为开发具有优异高温抗氧化性能的新型合金材料,以CoCrNi合金为基体,协同添加Al和Ta元素,制备了(CoCrNi)_96-xTa₄Al_x(x=3, 6, 12)高熵合金,研究了Al含量对合金微观组织、相结构以及1200 ℃高温抗氧化行为和氧化动力学的影响。结果表明,随着Al含量的增加,(CoCrNi)_96-xTa₄Al_x(x=3, 6, 12)高熵合金基体从FCC相逐渐转变成BCC相,其中(CoCrNi)₉₀Ta₄Al₆合金形成了FCC+BCC双相结构。(CoCrNi)_96-xTa₄Al_x(x=3, 6, 12)高熵合金在1200 ℃高温循环氧化条件下表现出良好的抗氧化性能,随着Al含量的增加,其抗氧化性能也随之提高,氧化动力学曲线和氧化速率常数平稳。(CoCrNi)_96-xTa₄Al_x(x=3, 6, 12)高熵合金氧化后的表面氧化层主要由Cr₂O₃、Al₂O₃和少量Ta₂O₅组成,高温下完整致密的氧化层很好地保护了合金,使合金的高温抗氧化性能十分优异。

关键词: 高熵合金, 微观结构, 高温氧化, 氧化动力学

Abstract: In order to develop new alloy materials with excellent high temperature oxidation resistance, Al and Ta was added in a synergistic manner into the base substrate of CoCrNi alloy to prepare (CoCrNi)_96-xTa₄Al_x(x=3, 6, 12) high entropy alloy, and the effect of Al content on microstructure, phase structure, high temperature oxidation resistance and oxidation kinetics at 1200 ℃ of the alloy was studied. The results show that with the increase of Al content, the matrix of the (CoCrNi)_96-xTa₄Al_x(x=3, 6, 12) high entropy alloy gradually transforms from FCC phase to BCC phase, and the (CoCrNi)₉₀Ta₄Al₆ alloy forms FCC+BCC dual-phase. The (CoCrNi)_96-xTa₄Al_x(x=3, 6, 12) high entropy alloy exhibits good oxidation resistance after high temperature cyclic oxidation at 1200 ℃. Moreover, with the increase of Al content, the oxidation resistance also increases, and the oxidation kinetic curve and oxidation rate constant are stable. The surface oxide layer of the (CoCrNi)_96-xTa₄Al_x(x=3, 6, 12) high entropy alloy after oxidation is mainly composed of Cr₂O₃, Al₂O₃ and a small amount of Ta₂O₅. The complete and dense oxide layer formed at high temperature effectively protects the alloy, so that the high temperature oxidation resistance of the alloy is very excellent.

Key words: high entropy alloy, microstructure, high temperature oxidation, oxidation kinetics

中图分类号:

TG172.82

汤泉, 仝永刚, 胡永乐, 杨玲伟, 邓吨英. Al含量对(CoCrNi)_96-xTa₄Al_x(x=3,6,12)高熵合金抗氧化行为与氧化动力学的影响[J]. 金属热处理, 2024, 49(10): 226-233.

Tang Quan, Tong Yonggang, Hu Yongle, Yang Lingwei, Deng Dunying. Effect of aluminium content on antioxidant behaviour and oxidation kinetics of (CoCrNi)_96-xTa₄Al_x(x=3, 6, 12) high entropy alloy[J]. Heat Treatment of Metals, 2024, 49(10): 226-233.

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Al含量对(CoCrNi)_96-xTa₄Al_x(x=3,6,12)高熵合金抗氧化行为与氧化动力学的影响

Effect of aluminium content on antioxidant behaviour and oxidation kinetics of (CoCrNi)_96-xTa₄Al_x(x=3, 6, 12) high entropy alloy

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