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The tribological behaviour and tribochemical mechanism of action of oxovanadium (IV)‐dithiophosphate
Author(s) -
GuoXu Chen,
RenGen Xiong,
JunXiu Dong
Publication year - 1997
Publication title -
lubrication science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.632
H-Index - 36
eISSN - 1557-6833
pISSN - 0954-0075
DOI - 10.1002/ls.3010090307
Subject(s) - x ray photoelectron spectroscopy , rubbing , tribology , diffractometer , materials science , vanadium , vanadium oxide , chemical engineering , oxide , phosphide , auger electron spectroscopy , metallurgy , scanning electron microscope , composite material , nickel , physics , nuclear physics , engineering
Vanadium (IV)‐oxo‐dicyclodithiophosphate (VDTP) was prepared and its additive properties evaluated using a four‐ball machine. The results show that VDTP exhibits better extremepressure performance, but lower antiwear activity, when compared with ZDTP. The reaction film composition, characterised by scanning Auger microscopy (SAM), X‐ray photoelectron spectroscopy (XPS) and diffractometer surface techniques, reveals that the antiwear and friction layer containing vanadium oxide, phosphate/phosphide, and sulphide, prevent the rubbing pairs from contacting directly, resulting in better extreme‐pressure and antiwear behaviour.