nc-Ti(C,N)/a-C复合涂层的微观结构和性能

doi:10.11896/cldb.22080131

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Abstract To combine the high hardness and wear resistance of TiN and TiC coating with the self-lubricating and corrosion resistance of carbon coating. In this study, ternary nc-Ti(C, N) and nc-Ti(C, N)/a-C composite coating was synthesized through the cathodic arc and glow discharge technology. The effects of C content and characteristics on the microstructure, mechanical performance, tribological properties, and electroche-mical behavior of TiCN coatings were studied by SEM, XRD, Raman, XPS, nano-indenter, tribometer, and electrochemical workstation. The results show that with the increase of C content, the polycrystalline phase structure of TiN, TiC, and TiC_xN_1-x changes to polycrystalline/amorphous structure. With the C content of 43.85at%, amorphous components were precipitated to form the composite structure of TiN, TiC, TiC_xN_1-x, sp²-C, and sp³-C. As C content increased, the nano hardness (H), elastic modulus (E),H/E, and H³/E² of the coating were initially increased and then decreased, the coating has the highest hardness and the best toughness with a C content of 43.85at%. With the C content of 65.16at%, the TiCN coating showed a low friction coefficient of about less than 0.1 because of the high content of sp²-C and sp³-C. nc-Ti(C, N)/a-C composite structure significantly improved the electrochemical corrosion properties of the TiCN coating. When the C content is 43.85at%, the highest corrosion potential and the lowest corrosion current density of the TiCN coating are -0.108 V_SCE and 8.55×10^-10 A/cm² respectively. The combination of hard phases with graphite-like and amorphous structures can further strengthen the mechanical and frictional properties of the coatings. The better corrosion resistance of nc-Ti(C, N)/a-C composite coatings is mainly attributed to the dense nanocrystalline/amorphous structure and inert amorphous composition of the coatings.

Key words： composite film microstructure mechanical property self-lubrication corrosion

Published: 25 November 2023 Online: 2023-11-21

Fund:Shanghai University Experimental Technology Team Construction Plan (10110N230079-A07),Shanghai Excellent Technical Leader Project (22XD1434500),Initial Funding of Scientific Research for the Introduction of Talents (YJ2022-31),National Natural Science Foundation of China (51901138),Shanghai Natural Science Foundation (20ZR1455700).

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	CHEN Qiang
	ZHANG Ergen
	LIANG Dandan
	ZHOU Qiong
	HUANG Biao
	HAN Sheng

Cite this article:

CHEN Qiang,ZHANG Ergen,LIANG Dandan, et al. Microstructure and Properties of nc-Ti(C, N)/a-C Composite Coating[J]. Materials Reports, 2023, 37(22): 22080131-7.

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http://www.mater-rep.com/EN/10.11896/cldb.22080131 OR http://www.mater-rep.com/EN/Y2023/V37/I22/22080131

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