机械合金化与等离子喷涂技术制备FeCoCrNiMo高熵合金涂层的组织与腐蚀行为

田芸; 刘佳宁; 薛明明; 张东耀; 王雨馨; 耿可屏; 董艳春; 杨勇

doi:10.1007/s12613-024-2902-z

Volume 31 Issue 12

Dec. 2024

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文章导航 > 矿物冶金与材料学报（英文） > 2024 > 31(12): 2692-2705

Yun Tian, Jianing Liu, Mingming Xue, Dongyao Zhang, Yuxin Wang, Keping Geng, Yanchun Dong, and Yong Yang, Structure and corrosion behavior of FeCoCrNiMo high-entropy alloy coatings prepared by mechanical alloying and plasma spraying, Int. J. Miner. Metall. Mater., 31(2024), No. 12, pp. 2692-2705. https://doi.org/10.1007/s12613-024-2902-z

Cite this article as:

Yun Tian, Jianing Liu, Mingming Xue, Dongyao Zhang, Yuxin Wang, Keping Geng, Yanchun Dong, and Yong Yang, Structure and corrosion behavior of FeCoCrNiMo high-entropy alloy coatings prepared by mechanical alloying and plasma spraying, Int. J. Miner. Metall. Mater., 31(2024), No. 12, pp. 2692-2705. https://doi.org/10.1007/s12613-024-2902-z

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研究论文

机械合金化与等离子喷涂技术制备FeCoCrNiMo高熵合金涂层的组织与腐蚀行为

1)
河北工业大学材料科学与工程学院, 天津 300132, 中国
2)
河北工业大学河北省新型功能材料重点实验室, 电气设备可靠性与智能化国家重点实验室, 天津 300132, 中国
3)
天津中德应用科技大学机械工程学, 天津 300132, 中国

通讯作者:
董艳春 E-mail: dongrunyanchun@126.com

文章亮点

(1) 由于 Mo 元素与其他常见金属元素的熔点和原子半径相差较大，形成高熵合金时容易偏析。结合机械合金化和等离子喷涂技术，制备了均匀的FeCoCrNiMo高熵合金涂层。

(2)对FeCoCrNiMo高熵合金涂层的微观组织和力学性能进行了分析。

(3)分析了FeCoCrNiMo高熵合金涂层在模拟海水中的耐腐蚀性，并对其腐蚀机理进行了研究。

中文摘要

为了解决高熵合金常见的元素偏析问题并制备出均匀的FeCoCrNiMo高熵合金涂层，采用了机械合金化技术制备了FeCoCrNiMo复合粉末，并利用等离子喷涂技术将其制成了面心立方相的高熵合金涂层。利用扫描电子显微镜、透射电子显微镜和 X 射线衍射仪对涂层的微观结构和相组成进行了表征。测试了涂层的硬度、弹性模量和断裂韧性，并分析了涂层在模拟海水中的耐腐蚀性。结果表明，涂层的硬度为 HV_0.1 606.15，弹性模量为 128.42 GPa，断裂韧性为 43.98 MPa·m^1/2。涂层在 3.5wt% NaCl 溶液中的腐蚀电位为 −0.49 V，腐蚀电流密度为 1.2 × 10⁻⁶ A/cm²。电化学系统由电解液、浸泡过程中产生的吸附膜和金属氧化膜以及FeCoCrNiMo高熵合金涂层三部分共同组成。腐蚀过程中，随着时间的延长，腐蚀反应速率先增大后减小，金属氧化物组成的腐蚀产物膜在形成和溶解之间达到动态平衡，涂层被腐蚀的速度变缓。

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Research Article

Structure and corrosion behavior of FeCoCrNiMo high-entropy alloy coatings prepared by mechanical alloying and plasma spraying

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Abstract

Abstract

FeCoCrNiMo_x composite powders were prepared using the mechanical alloying technique and made into high-entropy alloy (HEA) coatings with the face-centered cubic phase using plasma spraying to address the element segregation problem in HEAs and prepare uniform HEA coatings. Scanning electron microscopy, transmission electron microscopy, and X-ray diffractometry were employed to characterize these coatings’ microstructure and phase composition. The hardness, elastic modulus, and fracture toughness of coatings were tested, and the corrosion resistance was analyzed in simulated seawater. Results show that the hardness of the coating is HV_0.1 606.15, the modulus of elasticity is 128.42 GPa, and the fracture toughness is 43.98 MPa·m^1/2. The corrosion potential of the coating in 3.5wt% NaCl solution is –0.49 V, and the corrosion current density is 1.2 × 10⁻⁶ A/cm². The electrochemical system comprises three parts: the electrolyte, the adsorption and metallic oxide films produced during immersion, and the FeCoNiCrMo HEA coating. Over increasingly long periods, the corrosion reaction rate increases first and then decreases, the corrosion product film comprising metal oxides reaches a dynamic balance between formation and dissolution, and the internal reaction of the coating declines.
- high-entropy alloy coatings;
- plasma spray;
- mechanical alloying;
- microstructure;
- corrosion behavior;
- mechanical property

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