Influence of annealing treatment on the microstructure and corrosion resistance of AlxTiyCoCrFeNi high-entropy coatings

IF 7.4 1区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY Corrosion Science Pub Date : 2025-03-01 DOI:10.1016/j.corsci.2025.112838
Yongkuan Zhou , Jiajie Kang , Guozheng Ma , Lina Zhu , Qiang Da , Xulei Wu , Ruifeng Li , Bin Liu
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Abstract

The effects of Al, Ti and annealing temperature on the microstructure, phase structure, and corrosion resistance of the HVOF-sprayed AlxTiyCoCrFeNi coatings were investigated. Annealing treatment at 500 °C leads to homogenization within the coating structure as well as a reduction in the inhomogeneity of the chemical potential distribution, so the coatings annealed at 500 °C demonstrate outstanding corrosion resistance. However, an increase Al content correlates with a decrease in the passivation film thickness and densification, which ultimately leads to reduced corrosion resistance of the coating. Conversely, an increased trace Ti content enhances the corrosion resistance of high-entropy coatings.
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退火处理对AlxTiyCoCrFeNi高熵涂层组织及耐蚀性的影响
研究了Al、Ti和退火温度对hvof喷涂AlxTiyCoCrFeNi涂层显微组织、相结构和耐蚀性的影响。500°C退火处理导致涂层组织内部均匀化,并减少化学势分布的不均匀性,因此500°C退火的涂层具有出色的耐腐蚀性。然而,Al含量的增加与钝化膜厚度和致密化程度的降低有关,这最终导致涂层的耐腐蚀性降低。相反,增加的微量Ti含量提高了高熵涂层的耐腐蚀性。
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来源期刊
Corrosion Science
Corrosion Science 工程技术-材料科学:综合
CiteScore
13.60
自引率
18.10%
发文量
763
审稿时长
46 days
期刊介绍: Corrosion occurrence and its practical control encompass a vast array of scientific knowledge. Corrosion Science endeavors to serve as the conduit for the exchange of ideas, developments, and research across all facets of this field, encompassing both metallic and non-metallic corrosion. The scope of this international journal is broad and inclusive. Published papers span from highly theoretical inquiries to essentially practical applications, covering diverse areas such as high-temperature oxidation, passivity, anodic oxidation, biochemical corrosion, stress corrosion cracking, and corrosion control mechanisms and methodologies. This journal publishes original papers and critical reviews across the spectrum of pure and applied corrosion, material degradation, and surface science and engineering. It serves as a crucial link connecting metallurgists, materials scientists, and researchers investigating corrosion and degradation phenomena. Join us in advancing knowledge and understanding in the vital field of corrosion science.
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