Microstructure,wear and friction behavior of CoCrAlTaY-xCNTs composite coatings deposited by laser-induction hybrid cladding

Sheng-Feng Zhou ¹Yu Long ²Yan-Liang Yi ³Cheng Deng ⁴Lian-Xi Hu⁵

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作者信息

1. Institute of Advanced Wear & Corrosion Resistant and Functional Materials,Jinan University,Guangzhou 510632,China;Wuhan National Laboratory for Optoelectronics(WNLO),Huazhong University of Science and Technology,Wuhan 430074,China
2. MOE Key Laboratory of New Processing Technology for Non-Ferrous Metals and Materials,Guangxi Key Laboratory of Processing for Non-Ferrous Metals and Featured Materials,Guangxi University,Nanning 530004,China
3. Institute of Advanced Wear & Corrosion Resistant and Functional Materials,Jinan University,Guangzhou 510632,China
4. School of Mechatronics Engineering,Guangdong Polytechnic Normal University,Guangzhou 510635,China
5. School of Materials Science and Engineering,Harbin Institute of Technology,Harbin 150001,China
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Abstract

To improve the wear performance of CoCrA-lYTa coating,part of the carbon nanotubes(CNTs)chemically reacted with Ta to form reinforcement phase(TaC),while the other CNTs were retained as lubrication phase.Subsequently,the CoCrAlYTa-xCNTs(x=0,1,2,and 4;wt％)composite coatings were prepared by laser-induction hybrid cladding(LIHC),and the microstructure and wear resistance of coatings were systematically ana-lyzed.Results show that the coatings are mainly composed of TaC,y-(Co,Cr)and β-(Co,Cr)Al.As the CNTs content increases from 0 wt％ to 4 wt％,the volume fraction of TaC increases from 13.11 vol％ to 16.12 vol％.Meanwhile,the nano-hardness of y-(Co,Cr)and β-(Co,Cr)Al are improved from 7.49 and 9.72 to 9.36 and 11.19 GPa,respectively.As a result,the microhardness of coating increases from HV 536.25 to HV 738.16,the wear rate decreases from 32.4 x 10-3 to 6.1 x 10-3 mg·m-1,and the average fric-tion coefficient decreases from 0.55 to 0.44.The good wear performance of the coating is attributed to the formation of TaC and the existence of remained CNTs lubricant film.

Key words

Carbon nanotube/MCrAlY coating/Friction and wear performance/Laser-induction hybrid cladding

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基金项目

National Natural Science Foundation of China(52005217)

National Natural Science Foundation of China(51261026)

Basic and Applied Basic Research Fund Project of Guangdong Province in China(2023A1515012684)

Basic and Applied Basic Research Fund Project of Guangdong Province in China(2021A1515010523)

Basic and Applied Basic Research Fund Project of Guangdong Province in China(2020A1515110020)

University Research Platform and Research Projects of Guangdong Education Department(2022ZDZX3003)

Open Foundation of Guangxi Key Laboratory of Processing for Nonferrous Metals and Featured Materials(2022GXYSOF18)

Guanxi Key Laboratory of Information Materials(221012-K)

Open Project Program of Wuhan National Laboratory for Optoelectronics(2021WNLOKF010)

Fundamental Research Funds for the Central Universities(21622110)

出版年

2024

稀有金属(英文版)

中国有色金属学会

稀有金属(英文版)

CSTPCDCSCDEI

影响因子：0.801

ISSN：1001-0521

参考文献量51

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