Ta2O5掺杂量对金属3D打印熔覆AlCoCrFeNi高熵合金涂层组织和性能的影响

IF 3.5 3区 材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY
Hao Zhang, Youqiang Wang, Jizhou Duan
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引用次数: 0

摘要

高熵合金(HEA)涂层具有较高的强度、硬度和耐腐蚀性,提高了合金的使用寿命。这为HEA的实际应用开辟了一条新的途径。本研究的重点是通过金属3D打印技术制备由AlCrCoFeNi/x Ta2O5 (x = 2,6,10,20 (wt%))组成的HEA复合涂层。研究了不同Ta2O5掺杂量的涂层的形貌、微观结构、电化学腐蚀、硬度和干磨损性能。这是通过光学显微镜、激光共聚焦显微镜、x射线衍射、x射线光电子能谱、扫描电子显微镜和能量色散x射线能谱来实现的。结果表明,所制备的涂层具有相对平坦的表面,没有任何可识别的缺陷,如裂纹或孔隙。涂层表面由三个不同的区域组成:平坦区、飞溅颗粒区和重叠接缝区。整体形态的特点是质地粗糙。当Ta₂O₅含量为10%时,涂层的表面质量得到优化。涂层主要包括面心立方相和体心立方相。随着Ta₂O₅颗粒掺杂含量的增加,BCC相和涂层的硬度也会增加。此外,涂层表面的钝化膜主要由Al, Cr, Fe, Co, Ni和Ta氧化物组成,表现出优异的稳定性。在涂层中掺杂10 wt% Ta₂O₅,具有优异的耐腐蚀性和耐磨性。最高Ecorr值为−0.65 V,最低Icorr值为7.63 × 10-6 A/cm2,最大Rp值为4693 Ω/cm2。涂层的表面硬度最高,硬度为585.58 HV,磨损率为6.519 × 10-2 mm3 N−1 mm−1,最小磨损体积为19.01 mm3。这些特性说明了涂层的性能。图形抽象
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Effect of Ta2O5 doping content on the organization and properties of AlCoCrFeNi high-entropy alloy coatings cladding by metal 3D printing

High-entropy alloy (HEA) coatings can impart high strength, hardness, and corrosion resistance, enhancing the service life of the alloy. This opens up a new path for HEA in practical applications. This research focuses on HEA composite coatings made up of AlCrCoFeNi/x Ta2O5 (x = 2, 6, 10, 20 (wt%)) fabricated through the metal 3D printing technique for cladding. A comprehensive investigation was conducted on the morphology, microstructure, electrochemical corrosion, hardness, and dry wear properties of coatings doped with varying contents of Ta2O5 particles. This was achieved through including optical microscopy, laser confocal microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, and energy-dispersive X-ray spectroscopy. The results demonstrated that the prepared coatings exhibited a relatively flat surface without any discernible defects, such as cracks or porosity. The surface of the coating consists of three distinct regions: flat zones, splash particle zones, and overlapping joint zones. The overall morphology is characterized by a rough texture. The surface quality of the coating is optimized when the Ta₂O₅ content is 10%. The coating predominantly comprises face-centered cubic and body-centered cubic (BCC) phases. With an increase in the doping content of Ta₂O₅ particles, the BCC phase and the coating’s hardness also increase. Furthermore, the passivation film on the surface of the coating is predominantly composed of Al, Cr, Fe, Co, Ni, and Ta oxides, exhibiting exceptional stability. The doped of 10 wt% Ta₂O₅ to the coating resulted in excellent corrosion and wear resistance. The highest Ecorr value was − 0.65 V, the lowest Icorr value was 7.63 × 10–6 A/cm2, and the largest Rp value was 4693 Ω/cm2. Additionally, the coating exhibited the highest surface hardness of the coating exhibited a hardness of 585.58 HV, a wear rate of 6.519 × 10–2 mm3 N−1 mm−1, and a minimal wear volume of 19.01 mm3. These characteristics are illustrative of the coating’s performance.

Graphical abstract

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来源期刊
Journal of Materials Science
Journal of Materials Science 工程技术-材料科学:综合
CiteScore
7.90
自引率
4.40%
发文量
1297
审稿时长
2.4 months
期刊介绍: The Journal of Materials Science publishes reviews, full-length papers, and short Communications recording original research results on, or techniques for studying the relationship between structure, properties, and uses of materials. The subjects are seen from international and interdisciplinary perspectives covering areas including metals, ceramics, glasses, polymers, electrical materials, composite materials, fibers, nanostructured materials, nanocomposites, and biological and biomedical materials. The Journal of Materials Science is now firmly established as the leading source of primary communication for scientists investigating the structure and properties of all engineering materials.
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