316L钢液铅铋共晶激光熔覆AlCrFeNiNb高熵合金涂层的组织与腐蚀性能

IF 4.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Intermetallics Pub Date : 2025-05-28 DOI:10.1016/j.intermet.2025.108852

Xianfeng Ma , Changquan Xiao , Wenjian Zhu, Da Wang, Bihan Sun, Sirui Liu

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引用次数: 0

摘要

采用激光熔覆技术在316L奥氏体钢表面制备了AlCrFeNiNb高熵合金（HEA）涂层。研究了涂层样品的显微组织及其在含氧浓度为5 × 10−6 wt%、温度为550℃的铅铋共晶（LBE）中300、700和1000 h的腐蚀行为。结果表明：该涂层组织致密，冶金结合良好，氧化速率较低，但无氧化垢时易发生溶解腐蚀；讨论了HEA涂层在LBE中的腐蚀机理，以及涂层相组成对腐蚀行为的正负影响。并在此基础上提出了涂层工艺的优化。

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Microstructure and corrosion performance of laser-cladded AlCrFeNiNb high-entropy alloy coating on 316L steel in liquid lead-bismuth eutectic

The AlCrFeNiNb high-entropy alloy (HEA) coating was prepared on 316L austenite steel by laser cladding. The microstructure of as-received coating sample and its corrosion behavior in 550 °C lead-bismuth eutectic (LBE) with 5 × 10⁻⁶ wt% oxygen concentration for 300, 700, and 1000 h of exposure were investigated. The results show that the coating exhibits compact structure, metallurgical bonding, lower oxidation rate, but susceptible to dissolution corrosion when absence of an oxide scale. The corrosion mechanism of the HEA coating in the LBE, and the positive or negative effects of the phase compositions of coating on the corrosion behavior were discussed. The optimization of fabricating coating is also raised based on the results.

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来源期刊

Intermetallics 工程技术-材料科学：综合

CiteScore

7.80

自引率

9.10%

发文量

291

审稿时长

37 days

期刊介绍： This journal is a platform for publishing innovative research and overviews for advancing our understanding of the structure, property, and functionality of complex metallic alloys, including intermetallics, metallic glasses, and high entropy alloys. The journal reports the science and engineering of metallic materials in the following aspects: Theories and experiments which address the relationship between property and structure in all length scales. Physical modeling and numerical simulations which provide a comprehensive understanding of experimental observations. Stimulated methodologies to characterize the structure and chemistry of materials that correlate the properties. Technological applications resulting from the understanding of property-structure relationship in materials. Novel and cutting-edge results warranting rapid communication. The journal also publishes special issues on selected topics and overviews by invitation only.