Premium
Can WSeC Coatings Be Competitive to WSC Ones?
Author(s) -
Evaristo Manuel,
Polcar Tomas,
Cavaleiro Albano
Publication year - 2009
Publication title -
plasma processes and polymers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.644
H-Index - 74
eISSN - 1612-8869
pISSN - 1612-8850
DOI - 10.1002/ppap.200930414
Subject(s) - materials science , reciprocating motion , tribology , amorphous carbon , sputtering , carbon fibers , nanoindentation , metallurgy , amorphous solid , composite material , transition metal , diffraction , indentation , analytical chemistry (journal) , thin film , crystallography , nanotechnology , optics , chemistry , mechanical engineering , physics , chromatography , composite number , gas compressor , biochemistry , engineering , catalysis
WSeC coatings were deposited by co‐sputtering from WSe 2 and C targets. Carbon content varied from 25 up to 70 at.%, Se/W ratio was between 0.9 and 1.0, with no significant influence of the carbon content on their variations. The hardness of the coatings was evaluated by nano‐indentation with values between 3.8 and 5.6 GPa. The structure of the coatings analysed by X‐ray diffraction in glancing mode could be defined as quasi‐amorphous. The tribological properties were evaluated in an SRV machine using reciprocating ball‐on‐disk tests under increasing loads. In general, the friction gets decreased with increasing loads. The comparison with other transition metals, dichalcogenides alloyed with carbon, namely MoSeC and WSC systems, showed that WSeC coatings could be a good alternative with almost identical friction properties.