电火花沉积AlCoCrFeNi高熵合金涂层的高速摩擦磨损性能

doi:10.11896/cldb.18050104

材料导报

2019, Vol. 33

Issue (9): 1462-1465 https://doi.org/10.11896/cldb.18050104

材料与可持续发展（二）——材料绿色制作与加工*

电火花沉积AlCoCrFeNi高熵合金涂层的高速摩擦磨损性能

郭策安^1,2, 赵宗科¹, 赵爽¹, 卢凤生³, 赵博远⁴, 张健¹

1 沈阳理工大学装备工程学院,沈阳 110159;
2 重庆建设工业(集团)有限责任公司,重庆 400054;
3 北方华安工业集团有限公司,齐齐哈尔 161046;
4 中国人民解放军65186部队,铁岭 112609

High-speed Friction and Wear Performance of Electrospark Deposited AlCoCrFeNi High-entropy Alloy Coating

GUO Ce’an^1,2, ZHAO Zongke¹, ZHAO Shuang¹, LU Fengsheng³, ZHAO Boyuan⁴, ZHANG Jian¹

1 School of Equipment Engineering, Shenyang Ligong University, Shenyang 110159;
2 Chongqing Jianshe Industry (Group) LLC, Chongqing 400054;
3 North Huaan Industry Group Co. Ltd., Qiqihar 161046;
4 65186 PLA Troops, Tieling 112609

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摘要通过与传统电镀硬Cr涂层比较,研究了电火花沉积AlCoCrFeNi涂层的高速摩擦磨损性能。采用纳米压痕仪和摩擦磨损试验机测试涂层的纳米力学性能和摩擦系数,采用SEM、TEM、EDS和XRD分析涂层的微观结构、成分及相组成。结果表明,AlCoCrFeNi涂层晶粒细小,组织致密无裂纹,由BCC和FCC两相构成;AlCoCrFeNi涂层的硬度较硬Cr涂层的硬度提高了约10%,弹性模量降低了约8%,并具有更高的H/E与H³/E²值;与淬火GCr15钢球对磨时,当加载载荷为10 N、往复行程为10 mm、往复速率为800 r/min,AlCoCrFeNi涂层在稳定摩擦阶段的摩擦系数仅为0.25~0.33,而硬Cr涂层为0.65~0.73,AlCoCrFeNi涂层的磨损率较硬Cr涂层的磨损率减小了约41%;硬Cr涂层的磨损机制主要为粘着磨损,失效方式为因脆性裂纹扩展而产生的剥落,而AlCoCrFeNi涂层的磨损机制主要为微切削的磨粒磨损和氧化磨损,摩擦磨损过程中形成的氧化物层提高了涂层的耐磨性能。综上,AlCoCrFeNi涂层较硬Cr涂层具有更好的高速摩擦磨损性能。

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关键词: 电火花沉积高熵合金 AlCoCrFeNi涂层硬Cr涂层硬度弹性模量高速摩擦磨损

Abstract: The high-speed friction and wear performance of the electrospark deposited AlCoCrFeNi high entropy alloy coating was investigated by taking conventional electroplated hard Cr coating as comparison. The nanoindentor and friction and wear testing machine were employed to test the nano-mechanical properties and friction coefficient of the coatings. Furthermore, scanning electron microscopy (SEM), transmission electron microscope (TEM), energy dispersive X-ray spectrum (EDS) and X-Ray Diffraction (XRD) were adopted to analyze the microstructure, composition and phase structure of the coatings. The results indicated that the AlCoCrFeNi coating exhibited fine grains and compact structure without cracks and consisted of BCC and FCC phases. There were an approximate 10% increase in hardness, a 8% decrease in elasticity modulus, a higher values of H/E and H³/E² of the AlCoCrFeNi coating, compared with the hard Cr coating. The steady friction coefficient of the AlCoCrFeNi coating was only 0.25—0.33, while the hard Cr coating was 0.65—0.73, when the quenched GCr15 steel ball was used as one of the friction pair under the load of 10 N, the reciprocating travel of 10 mm and the velocity of 800 r/min. AlCoCrFeNi coating showed about 41% reduction in wear rate compared with hard Cr coating. The wear mechanism of the hard Cr coating is mainly characterized as adhesive wear, and the failure mode can be attributed to spalling caused by crack propagation, whilst the wear mechanism of the AlCoCrFeNi coating primarily belongs to micro-cutting abrasive wear and oxidation wear, and the oxide film formed in the course of friction and wear contributed to the wear resistance of the AlCoCrFeNi coating. In conclusion, the AlCoCrFeNi coating presents better high-speed friction and wear performance than the hard Cr coating.

Key words: electrospark deposition high-entropy alloy AlCoCrFeNi coating hard Cr coating hardness elasticity modulus high-speed friction and wear

发布日期: 2019-05-08

ZTFLH:	TB304
	TB34

基金资助: 辽宁省自然科学基金(201602643);沈阳理工大学辽宁省兵器科学与技术重点实验室开放基金(4771004kfs25)

通讯作者: zhangjian6165@aliyun.com

作者简介: 郭策安,沈阳理工大学,副教授。2015年7月毕业于东北大学,材料学博士学位。主要从事武器系统新材料新工艺的技术研发,重点研究材料的腐蚀与防护技术。近年主持了4项省部级科研项目,发表学术论文20余篇。张健,沈阳理工大学,教授。2012年5月毕业于东北大学,材料学博士学位。主要从事武器系统新材料新工艺的技术研发,重点研究材料的腐蚀与防护技术。近年主持完成了10余项国家军品科研项目,发表学术论文40余篇。多项成果获国家国防科学技术奖、兵器工业集团公司科技进步奖。

引用本文:

郭策安, 赵宗科, 赵爽, 卢凤生, 赵博远, 张健. 电火花沉积AlCoCrFeNi高熵合金涂层的高速摩擦磨损性能[J]. 材料导报, 2019, 33(9): 1462-1465.
GUO Ce’an, ZHAO Zongke, ZHAO Shuang, LU Fengsheng, ZHAO Boyuan, ZHANG Jian1. High-speed Friction and Wear Performance of Electrospark Deposited AlCoCrFeNi High-entropy Alloy Coating. Materials Reports, 2019, 33(9): 1462-1465.

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http://www.mater-rep.com/CN/10.11896/cldb.18050104 或 http://www.mater-rep.com/CN/Y2019/V33/I9/1462

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