In-situ formation of layer-like Ag2MoO4 induced by high-temperature oxidation and its effect on the self-lubricating properties of NiCoCrAlYTa/Ag/Mo coatings

Enkang Hao ¹Yulong An ¹Jie Chen ²Xiaoqin Zhao ³Guoliang Hou ³Jianmin Chen ¹Meizhen Gao ⁴Fengyuan Yan¹

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作者信息

1. State Key Laboratory of Solid Lubrication,Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Lanzhou 730000,China;Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China
2. China Academy of Ordnance Science Ningbo Branch,Ningbo 315103,China
3. State Key Laboratory of Solid Lubrication,Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Lanzhou 730000,China
4. Key Lab for Magnetism and Magnetic Materials of MOE,School of Physical Science and Technology,Lanzhou University,Lanzhou 730000,China
折叠

Abstract

Ag-Mo-O ternary oxide has attracted growing attention because of its potential as a solid lubricant at high temperatures.This work designs and prepares NiCoCrAlYTa/Ag/Mo composite coating,performed using high velocity oxy-fuel(HVOF)spraying technology.The environment temperature plays an important role in the microstructure and phases as well as lubricant properties of NiCoCrAlYTa/Ag/Mo coatings.When the environment temperature is above 600C,the outer diffusion and oxidation of Ag and Mo lead to the formation of Ag2MoO4 on the coating surface.Layer-like Ag2MoO4 could form a continuous lubricant film at 800℃and consequently let the composite coating present the best tribological properties.Meanwhile,a small number of hard particles could play a good bearing role during friction and improve the tribological properties of the composite coating.

Key words

Microstructure evolution/In-situ formation/Ag2MoO4/Layer-like structure/High-temperature friction

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基金项目

出版年

2021

材料科学技术(英文版)

中国金属学会中国材料研究学会中国科学院金属研究所

材料科学技术(英文版)

CSTPCDCSCDSCI

影响因子：0.657

ISSN：1005-0302

参考文献量36

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