scholarly journals Effect of target power on the structure and tribological Properties of La-Ti/WS2 composite films prepared by unbalanced magnetron sputtering

2020 ◽  
Vol 7 (3) ◽  
pp. 036401 ◽  
Author(s):  
Haichao Cai ◽  
Yujun Xue ◽  
Jiangtao He ◽  
Fang Yang ◽  
Xiqiang Ma
Keyword(s):  
Magnetron Sputtering ◽  
Tribological Properties ◽  
Composite Films ◽  
Unbalanced Magnetron Sputtering ◽  
Unbalanced Magnetron ◽  
Target Power

scholarly journals Influence of Carbon: Metal Ratio on Tribological Behavior of Mo-W-C Coating

2021 ◽  
Vol 11 (21) ◽  
pp. 10189
Author(s):  
Paranjayee Mandal
Keyword(s):  
Magnetron Sputtering ◽  
Ambient Temperature ◽  
Tribological Properties ◽  
Friction Reduction ◽  
Low Friction ◽  
Unbalanced Magnetron Sputtering ◽  
Debris Particles ◽  
Unbalanced Magnetron ◽  
Coating Microstructure ◽  
Metal Ratio

Mo-W-C coatings with three different C/(Mo+W) ratios (5:1, 2.8:1 and 2.2:1) were deposited by using combined unbalanced magnetron sputtering (UBMS) and high-power impulse magnetron sputtering (HIPIMS) technology. The influence of the C/(Mo+W) ratio on coating microstructure and related tribological properties at ambient temperature and at 200 °C were studied in lubricated condition (up to 7500 m and 1800 m of sliding distances, respectively). Results showed that a decrease in the C/(Mo+W) ratio could be correlated with an increase in coating thickness, adhesion strength, hardness and elastic modulus values, and a decrease in the degree of graphitization. At ambient temperature, outstanding tribological properties (very low friction and negligible wear) were observed irrespective of the C/(Mo+W) ratio. At 200 °C, low C/(Mo+W) ratios (2.8:1 and 2.2:1) were found particularly beneficial to achieve excellent tribological properties. The keys to significant friction reduction at 200 °C were (i) in situ formation of MoS2 and WS2 due to tribo-chemical reactions and (ii) presence of amorphous carbon debris particles in the protective tribolayer. With an increase in sliding distance, the tribolayer gradually lowered the friction coefficient by protecting both the coating and counterpart from severe wear. On the other hand, a high C/(Mo+W) ratio (5:1) led to low friction but noticeable abrasive wear at 200 °C.

Influence of CrB2 target current on the microstructure, mechanical and tribological properties of Cr–B–C–N coatings in water

RSC Advances ◽  
2016 ◽  
Vol 6 (53) ◽  
pp. 47698-47711 ◽  
Author(s):  
Qiang Ma ◽  
Fei Zhou ◽  
Qianzhi Wang ◽  
Zhiwei Wu ◽  
Kangmin Chen ◽  
...  
Keyword(s):  
Magnetron Sputtering ◽  
Tribological Properties ◽  
Stainless Steels ◽  
Closed Field ◽  
Mechanical And Tribological Properties ◽  
Unbalanced Magnetron Sputtering ◽  
Unbalanced Magnetron

Cr–B–C–N coatings with different boron contents (24.6–27.2 at%) were deposited on Si(100) wafers and 316L stainless steels by using closed-field unbalanced magnetron sputtering via adjusting the CrB2 target current.

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