Effects of fragments on W-DLC films properties under boundary lubrication condition in the friction system
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摘要
Effects of film fragments in the friction system on friction and wear properties of tungsten doped diamond-like carbon films( W-DLC) were studied in the condition of boundary lubrication. It could be observed that the average friction coefficient was increased after introducing film fragments into the friction system,where these film fragments can accelerate the breaking of the extreme thin oil film which could separate two friction surfaces when the system is under boundary lubrication conditions. The increasing friction load can accelerate the friction chemical reaction on the friction interface and lead to the crushing effect on film fragments,which decreased the friction coefficient of friction system. It was also found that the wear width,depth,and volume of the film increased by introducing film fragments and applying great load.
Effects of film fragments in the friction system on friction and wear properties of tungsten doped diamond-like carbon films( W-DLC) were studied in the condition of boundary lubrication. It could be observed that the average friction coefficient was increased after introducing film fragments into the friction system,where these film fragments can accelerate the breaking of the extreme thin oil film which could separate two friction surfaces when the system is under boundary lubrication conditions. The increasing friction load can accelerate the friction chemical reaction on the friction interface and lead to the crushing effect on film fragments,which decreased the friction coefficient of friction system. It was also found that the wear width,depth,and volume of the film increased by introducing film fragments and applying great load.
Effects of film fragments in the friction system on friction and wear properties of tungsten doped diamond-like carbon films( W-DLC) were studied in the condition of boundary lubrication. It could be observed that the average friction coefficient was increased after introducing film fragments into the friction system,where these film fragments can accelerate the breaking of the extreme thin oil film which could separate two friction surfaces when the system is under boundary lubrication conditions. The increasing friction load can accelerate the friction chemical reaction on the friction interface and lead to the crushing effect on film fragments,which decreased the friction coefficient of friction system. It was also found that the wear width,depth,and volume of the film increased by introducing film fragments and applying great load.
引文
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[2] Suzuki M,Saito T,Tanak A. Tribological properties of DLC films against different steels. Wear,2013,304(1-2):83-87.
[3] Li Z D,Zhan H,Wang Y Q,et al. Effect of substrate roughness on friction and wear properties of Cr-DLC films under dry-sliding condition. Tribology,2016,36(6):741-748.
[4] Mutafov P,Lanigan J,Neville A,et al. DLC-W coatings tested in combustion engine-frictional and wear analysis. Surface&Coatings Technology,2014,260:284-289.
[5] Wei Z G,Tanakab A,Wazumia K,et al. Structural,mechanical and tribological properties of diamond-like carbon films prepared under different substrate bias voltage. Diamond and Related Materials,2002,11(11):1837-1844.
[6] Erdemir A,Fontaine J,Donnet C. An overview of superlubricity in diamond-like carbon films. New York,Springer,2008.
[7] Wang Y X,Wang L P,Zhang G G,et al. Effect of bias voltage on microstructure and properties of Ti-doped graphite-like carbon films synthesized by magnetron sputtering. Surface&Coatings Technology,2010,205(3):793-800.
[8] Zhan H,Li Z D,Sha D,et al. Study of W-DLC film properties on carbide drill. New Technology&New Process.2015,330(6):122-124.
[9] Sánchez-López J C,Fernández A. Doping and alloying effects on DLC coatings in:tribology of diamond-like carbon films:fundamentals and applications. New York:Springer,2008.
[10] Wang R J,Zhan H,Li Z D,et al. Study of properties on bearings coated with tungsten doped diamond-like carbon films. Bearing,2015(7):41-44.
[11] Amanov A,Watabe T,Tsuboi R,et al. Fretting wear and fracture behaviors of Cr-doped and non-doped DLC films deposited on Ti-6Al-4V alloy by unbalanced magnetron sputtering. Tribology International, 2013,62:49-57.