Effect of chromium doping on high temperature tribological properties of silicon-doped diamond-like carbon films

Abstract The rapid development of aerospace industry has made more and more machinery parts of equipment working at high temperature. Due to the lubrication failure of lubricating oil and grease at high temperature, solid lubricant coatings are almost the only effective method to achieve super low friction at high temperature. In recent years, the tribological properties of diamond-like carbon (DLC) films have been extensively studied at high temperature. The present study reviews the microstructure of DLC films and the influence of doping different elements on the structure of DLC films. Second, the mechanical properties and thermal stability of pure DLC films and DLC doped with different elements are also described. DLC films have different microstructures and tribological properties by different preparation methods. Finally, the high-temperature lubrication failure mechanism of DLC films and the tribological properties of DLC films when doped with different elements are discussed from the macro and micro perspectives.

Download Full-text

Characteristics and surface energy of silicon-doped diamond-like carbon films fabricated by plasma immersion ion implantation and deposition

Diamond and Related Materials ◽

10.1016/j.diamond.2005.09.042 ◽

2006 ◽

Vol 15 (9) ◽

pp. 1276-1281 ◽

Cited By ~ 39

Author(s):

G.J. Wan ◽

P. Yang ◽

Ricky K.Y. Fu ◽

Y.F. Mei ◽

T. Qiu ◽

...

Keyword(s):

Surface Energy ◽

Ion Implantation ◽

Carbon Films ◽

Diamond Like Carbon ◽

Plasma Immersion Ion Implantation ◽

Silicon Doped

Download Full-text

The Effect of CNT Content on the Tribological Properties of CNTs Doped Diamond-Like Carbon Films

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.642.231 ◽

2015 ◽

Vol 642 ◽

pp. 231-235

Author(s):

Che Hung Wei ◽

Jui Feng Yang ◽

Chao I Wang

Keyword(s):

Friction Coefficient ◽

Critical Load ◽

Internal Stress ◽

Tribological Properties ◽

Chemical Vapor ◽

Carbon Films ◽

Diamond Like Carbon ◽

Element Analysis ◽

Multi Walled Carbon Nanotubes ◽

Walled Carbon Nanotubes

Diamond-like carbon (DLC) films is useful in many applications. To improve the tribological properties in DLC, we spin coat the multi-walled carbon nanotubes (CNTs) with different solution on (100) silicon. DLC was deposited by plasma enhanced chemical vapor deposition (PECVD) with C2H2and H2. The results show that the ID/IGratio is increasing with higher CNTs content while the friction coefficient and critical load are decreasing with larger CNTs contents. The decreasing friction coefficient results from graphitation on the surface due to higher sp2content. The decreasing critical load is attributed to higher internal stress. The effect of friction coefficient and CNT concentration on stress distribution is studied by a nanoscratch finite element analysis. The results indicate that low friction coefficient and high CNT concentration will reduce the stress magnitude in the film. Therefore, the decreasing friction coefficient in CNT doped DLC film with increasing CNT concentration should reduce stress in the film and is good for adhesion. The discrepancy between friction coefficient and critical load is explained in terms of high internal stress during deposition. A surface treatment on CNT before deposition to reduce internal stress is currently under investigation.

Download Full-text