曹玉霞,杜令忠,张伟刚,兰叶,黄传兵.等离子喷涂 NiCoCrAlY / Al2 O3 涂层的制备及摩擦性能研究[J].表面技术,2015,44(5):62-66.
CAO Yu-xia,DU Ling-zhong,ZHANG Wei-gang,LAN Ye,HUANG Chuan-bing.Study on Preparation and Tribological Properties of Atmospheric Plasma-sprayed NiCoCrAlY/ Al2O3 Wear-resistant Coatings[J].Surface Technology,2015,44(5):62-66
等离子喷涂 NiCoCrAlY / Al2 O3 涂层的制备及摩擦性能研究
Study on Preparation and Tribological Properties of Atmospheric Plasma-sprayed NiCoCrAlY/ Al2O3 Wear-resistant Coatings
投稿时间:2015-01-08  修订日期:2015-05-20
DOI:10.16490/j.cnki.issn.1001-3660.2015.05.012
中文关键词:  NiCoCrAlY/ Al2O3  复合涂层  等离子喷涂  摩擦性能
英文关键词:NiCoCrAlY / Al2 O3  composite coating  plasma spraying  tribological property
基金项目:国家自然科学基金项目(51471159) ;唐山市科技计划项目(14130286a);唐山学院材料科学与工程重点学科(TSC2013003)
作者单位
曹玉霞 唐山学院 环境与化学工程系, 河北 唐山 063000 
杜令忠 中国科学院过程工程研究所 多相复杂系统国家重点实验室, 北京 100190 
张伟刚 中国科学院过程工程研究所 多相复杂系统国家重点实验室, 北京 100190 
兰叶 博天环境集团股份有限公司, 北京 100082 
黄传兵 中国科学院过程工程研究所 多相复杂系统国家重点实验室, 北京 100190 
AuthorInstitution
CAO Yu-xia Department of Environmental and Chemical Engineering, Tangshan College, Tangshan 063000, China 
DU Ling-zhong State Key Laboratory of Multi-phase Complex Systems, Institute of Process Engineering of Chinese Academy of Sciences, Beijing 100190, China 
ZHANG Wei-gang State Key Laboratory of Multi-phase Complex Systems, Institute of Process Engineering of Chinese Academy of Sciences, Beijing 100190, China 
LAN Ye Botian Environmental Group Limited by Share Ltd, Beijing 100190, China 
HUANG Chuan-bing State Key Laboratory of Multi-phase Complex Systems, Institute of Process Engineering of Chinese Academy of Sciences, Beijing 100190, China 
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中文摘要:
      目的 制备等离子喷涂 NiCoCrAlY/ Al2O3 高温固体润滑耐磨涂层,并研究该涂层的摩擦性能和磨损机理 。 方法 采用喷雾造粒、化工冶金包覆和固相合金化技术制备 NiCoCrAlY/ Al2O3 复合粉体,用等离子喷涂技术在 45#钢表面制备 NiCoCrAlY/ Al2O3 复合涂层。 用 SEM 和 XRD 等手段分析粉体和涂层的显微结构和物相组成,研究涂层从室温到 800 ℃ 的摩擦磨损性能,探讨 NiCoCrAlY/ Al2O3 复合涂层在室温和高温下的磨损机理。 结果 Al2O3 颗粒表面均匀包覆着一层致密的 NiCoCrAlY 合金,包覆层厚度大约为 3 ~5 μm;等离子喷涂 NiCoCrAlY/ Al2O3 复合涂层呈典型的层状结构,涂层各层间结合良好,涂层中孔隙率约为 2. 84% ,主晶相为 NiCrAl 合金相和 Al2O3 相。 涂层的摩擦系数随温度的升高逐渐降低,在室温下约为 0. 64,800 ℃时在 0. 4 以下。 高温下,金属氧化物的形成是摩擦系数降低的主要原因。 涂层的磨损率随温度的升高先升高后降低。 涂层在低温下为脆性断裂和磨粒磨损,高温下为氧化磨损、磨粒磨损、塑性变形和金属氧化物的转℃。 结论 等离子喷涂 NiCoCrAlY/ Al2O3 复合涂层是一种性能优良的高温固体润滑耐磨涂层。
英文摘要:
      Objective To prepare the atmospheric plasma-sprayed NiCoCrAlY/ Al2O3 wear-resistant coatings and study the tribological properties and tribological mechanism of the coating. Methods The NiCoCrAlY / Al2 O3 composite powder was prepared by the technology of spray granulation, chemical and metallurgical coating and solid state alloying. The NiCoCrAlY / Al2 O3 composite coating was prepared by atmospheric plasma-spray technology using the prepared powder on the surface of 45# steel. The microstructure and phase composition of the powder and coating were studied by SEM and XED. The tribological properties and tribological mechanism of the APS sprayed NiCoCrAlY / Al2 O3 composite coatings were investigated. Results The surface of Al2 O3 particles was evenly coated with NiCoCrAlY alloy and the thickness of NiCoCrAlY alloy was 3 ~ 5 μm. The composite coatings consisted of elongated lamellae and they integrated with each other very well. The phase compositions of composite powder were NiCrAl and Al2 O3 . The friction coefficient of the coating decreased with the increase of temperature. The friction coefficient of the coating was 0. 64 at room temperature and decreased to below 0. 4 at 800 ℃ , which was due to the formation of metallic oxide. The wear rate of the coating first increased and then decreased with the increase of temperature. The abrasive mechanism of the NiCoCrAlY / Al2 O3 composite coatings was dominated by mixed brittle crack and abrasive at low temperature, and it was characterized by oxidation, abrasive, plastic deformation and as well as coating transfer to the coupled pin at high temperature. Conclusion The atmospheric plasma-sprayed NiCoCrAlY / Al2 O3 composite coating exhibited excellent wear-resistant performance by high temperature selflubrication.
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