Abstract
MoS2 coatings, deposited by PVD show a low friction under vacuum conditions, but degrade easily under atmospheric conditions. This work describes the development of a new type of MoSx, coating, modified with WC. These coatings presented a very low and stable friction coefficient lower than 0.04 when tested under vacuum at 0.75 GPa in a ball on disc tribometer. Durability was higher than 1 million wear cycles, showing a wear rate of 1.3 10e-16 m3 /Nm. When tested under atmospheric conditions and up to 70 % RH, friction increased to 0.15 and durability reached a lower value of up to 3 x 10e5 cycles.Surface analyses in these coatings showed S/Mo ratios higher than 1.2 and with oxygen levels lower than 2 %, demonstrating the lubricant character of the coating.
Translated title of the contribution | Tribology of new solid lubricating films produced by PVD |
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Original language | Spanish |
Pages (from-to) | 148-153 |
Number of pages | 6 |
Journal | Revista de Metalurgia |
Volume | SPEC. VOL. |
DOIs | |
Publication status | Published - 2005 |
Keywords
- MoS2
- PVD
- Solid lubricant coatings
- Tribology
- Wear
- Friction
Project and Funding Information
- Funding Info
- Ministerio de Ciencia y Tecnología (proyecto MAT2001-1399-C02-02)_x000D_Departamento de Educación, Universidades e Investigación del Gobierno Vasco (proyecto PI-2001-12).