添加WC颗粒对镁合金表面等离子喷涂Al基涂层耐腐蚀和耐磨损性能的影响

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中文摘要：常规热喷涂工艺制备的金属涂层内的粒子界面弱结合导致其不能为基材提供长效的腐蚀防护,因此,采用大气等离子喷涂,实现粒子间的冶金结合,制备高致密Al-15％WC(体积分数)复合涂层.结果表明,由于WC颗粒中C元素的去氯效应,以及超高温熔滴(＞1800 ℃)间的自冶金结合,在最优等离子喷涂条件下制备出无氧化物杂质的涂层.涂层的致密结构使其表现出优异耐腐蚀性能,其腐蚀电流密度比镁合金基体降低4个数量级,比纯铝块材降低2个数量级.WC硬质颗粒的添加使Al-WC复合涂层的耐磨损性能相较纯Al块材提高1个数量级.

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

外文摘要：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 ℃),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.

外文关键词：

atmospheric plasma spray(APS)Al-WC coatingself-metallurgical bondingdeoxidization effectcorrosion resistancewear resistance

作者：

Haroon RASHID、雒晓涛、董昕远、张黎、李长久

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作者单位：

西安交通大学材料科学与工程学院金属材料强度国家重点实验室,西安 710049

关键词：

大气等离子喷涂 Al-WC涂层自冶金结合去氧效应耐腐蚀性耐磨性

基金：

National Nature Science Foundation of ChinaNational Nature Science Foundation of ChinaChinese Scholarship Council(CSC)

项目编号：

52031010U1837201

出版年：

2024

DOI：

10.1016/S1003-6326(24)66540-4

中国有色金属学报(英文版)

中国有色金属学会

中国有色金属学报(英文版)

CSTPCD

影响因子：1.183

ISSN：1003-6326

年,卷(期)：2024.34(7)