Sputter deposited low-friction and tough Cr-Si3N4 nanocomposite coatings on plasma nitrided M2 steel

被引：8
作者：
Barshilia, Harish C. [1 ]
Deepthi, B. [1 ]
Srinivas, G. [1 ]
Rajam, K. S. [1 ]
机构：
[1] CSIR, Surface Engn Div, Natl Aerosp Labs, Bangalore 560017, Karnataka, India
来源：
VACUUM | 2012年 / 86卷 / 08期
关键词：
M2; steel; Cr-Si3N4 nanocomposite coating; Plasma nitriding; Magnetron sputtering; Toughness; Friction coefficient; MECHANICAL-PROPERTIES; DUPLEX TREATMENT; THIN-FILMS; MICROSTRUCTURE; CARBIDE; CARBON; TIN;
D O I：
10.1016/j.vacuum.2011.10.016
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Nanocomposite coatings of Cr-Si3N4 exhibiting low friction and high toughness were prepared on plasma nitrided AISI M2 steel substrates using an unbalanced magnetron sputtering system. The surface morphology and cross-sectional microstructure of the Cr-Si3N4 nanocomposite coatings were studied using field emission scanning electron microscopy (FESEM) techniques. Cr-Si3N4 nanocomposite coatings prepared at 48 at.% Cr exhibited a dense microstructure with nanoindentation hardness and toughness values of 18 GPa and 2.0 MPam(1/2), respectively. Nanoscratch measurements indicated that Cr-Si3N4 nanocomposite coatings exhibited good adhesion with a maximum critical load of 150 mN. Ball-on-disc reciprocating tests at a load of 2 N showed that Cr-Si3N4 nanocomposite coatings prepared at 48 at.% Cr exhibited an average friction coefficient of 0.30. FESEM studies of the wear tracks indicated that there was no significant wear loss and the Cr-Si3N4 nanocomposite coatings exhibited only mild wear due to oxidation. (C) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1118 / 1125
页数：8
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