Tailoring microstructure and phase segregation for low friction carbon-based nanocomposite coatings

被引：53

作者：

Zhou, Shengguo ^{[1
,3
]}

Wang, Liping ^{[1
]}

Lu, Zhibin ^{[1
]}

Ding, Qi ^{[1
]}

Wang, S. C. ^{[2
]}

Wood, Robert J. K. ^{[2
]}

Xue, Qunji ^{[1
]}

机构：

[1] Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China

[2] Univ Southampton, Sch Engn Sci, nCATS, Southampton SO17 1BJ, Hants, England

[3] Chinese Acad Sci, Grad Univ, Beijing 100039, Peoples R China

来源：

JOURNAL OF MATERIALS CHEMISTRY | 2012年 / 22卷 / 31期

基金：

中国国家自然科学基金;

关键词：

DIAMOND-LIKE CARBON; TRIBOLOGICAL PROPERTIES; MECHANICAL-PROPERTIES; HARD CARBON; FILMS; DLC; DEPOSITION; BEHAVIOR; DESIGN; TIN;

D O I：

10.1039/c2jm30918a

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Friction has a direct relation with the energy efficiency and environmental cleanliness in all moving mechanical systems. To develop low friction coatings is extremely beneficial for preserving not only our limited energy resources but also the earth's environment. This study proposes a new design for low friction carbon-based nanocomposite coatings by tailoring the microstructure and phase segregation, and thereby it contributes to better controlling the mechanical and tribological properties. Experimental findings and theoretical calculations reveal that high-hardness (18.2 GPa), high-adhesion strength (28 N) as well as low-internal stress (-0.8 GPa) can be achieved by a nanocrystallite/amorphous microstructure architecture for the nc-WC/a-C(Al) carbon-based nanocomposite coating; in particular low friction (similar to 0.05) can be acquired by creating a strong thermodynamic driving force to promote phase segregation of graphitic carbon from the a-C structure so as to form a low shear strength graphitic tribo-layer on the friction contact surfaces. This design concept is general and has been successfully employed to fabricate a wide class of low friction carbon-based nanocomposite coatings.

引用

页码：15782 / 15792

页数：11

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