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

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

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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.

Carbon nanotubeMCrAlY coatingFriction and wear performanceLaser-induction hybrid cladding

Sheng-Feng Zhou、Yu Long、Yan-Liang Yi、Cheng Deng、Lian-Xi Hu

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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

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

School of Mechatronics Engineering,Guangdong Polytechnic Normal University,Guangzhou 510635,China

School of Materials Science and Engineering,Harbin Institute of Technology,Harbin 150001,China

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National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaBasic and Applied Basic Research Fund Project of Guangdong Province in ChinaBasic and Applied Basic Research Fund Project of Guangdong Province in ChinaBasic and Applied Basic Research Fund Project of Guangdong Province in ChinaUniversity Research Platform and Research Projects of Guangdong Education DepartmentOpen Foundation of Guangxi Key Laboratory of Processing for Nonferrous Metals and Featured MaterialsGuanxi Key Laboratory of Information MaterialsOpen Project Program of Wuhan National Laboratory for OptoelectronicsFundamental Research Funds for the Central Universities

52005217512610262023A15150126842021A15150105232020A15151100202022ZDZX30032022GXYSOF18221012-K2021WNLOKF01021622110

2024

10.1007/s12598-023-02534-3

稀有金属(英文版)
中国有色金属学会

稀有金属(英文版)

CSTPCDEI
影响因子：0.801
ISSN：1001-0521
年,卷(期)：2024.43(4)
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