Plasma-sprayed Al-based coating with WC-addition for excellent corrosion resistance and enhanced wear protection of Mg alloys

IF 4.7 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Transactions of Nonferrous Metals Society of China Pub Date : 2024-07-01 DOI:10.1016/S1003-6326(24)66540-4

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Abstract

Thermal spray processes struggle to create a fully dense coating for corrosion protection in the as-sprayed state due to the poor inter-splat bonding. To tackle this problem, Al−15vol.%WC was utilized as the coating material and applied by atmospheric plasma spraying (APS) to produce a dense coating with self-metallurgical inter-splat bonding. The results show that due to the in-flight particle deoxidizing effect by C element and self-metallurgical bonding of the overheated droplet (>1800 °C), dense coating without oxides inclusions is produced under optimized plasma spraying conditions. The fully dense Al−WC coating exhibits excellent corrosion resistance, with corrosion current density lower by four and two orders than that of Mg alloy substrate and bulk Al, respectively. Due to the inclusion of hard WC particles, the Al−WC coating presents one order improvement in wear resistance compared with the bulk Al.

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添加了 WC 的等离子喷涂铝基涂层，可为镁合金提供出色的耐腐蚀性和更强的耐磨保护

由于板间结合力差，热喷涂工艺很难在喷涂状态下形成完全致密的防腐蚀涂层。为了解决这个问题，我们使用了体积分数为 15%WC 的铝作为涂层材料，并通过大气等离子喷涂 (APS) 制造出具有自冶金板间结合力的致密涂层。结果表明，在优化的等离子喷涂条件下，由于 C 元素对飞行中粒子的脱氧作用以及过热液滴（1800 °C）的自冶金结合，产生了无氧化物夹杂的致密涂层。完全致密的铝-碳化钨涂层具有优异的耐腐蚀性能，腐蚀电流密度分别比镁合金基体和块状铝低四个和两个数量级。由于加入了坚硬的碳化钨颗粒，铝-碳化钨涂层的耐磨性比铝基体提高了一个数量级。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Transactions of Nonferrous Metals Society of China 工程技术-冶金工程

CiteScore

7.40

自引率

17.80%

发文量

8456

审稿时长

3.6 months

期刊介绍： The Transactions of Nonferrous Metals Society of China (Trans. Nonferrous Met. Soc. China), founded in 1991 and sponsored by The Nonferrous Metals Society of China, is published monthly now and mainly contains reports of original research which reflect the new progresses in the field of nonferrous metals science and technology, including mineral processing, extraction metallurgy, metallic materials and heat treatments, metal working, physical metallurgy, powder metallurgy, with the emphasis on fundamental science. It is the unique preeminent publication in English for scientists, engineers, under/post-graduates on the field of nonferrous metals industry. This journal is covered by many famous abstract/index systems and databases such as SCI Expanded, Ei Compendex Plus, INSPEC, CA, METADEX, AJ and JICST.