Y. Yamamoto et S. Gondo, ENVIRONMENTAL-EFFECTS ON THE COMPOSITION OF SURFACE-FILMS PRODUCED BYAN ORGANOMOLYBDENUM COMPOUND, Tribology transactions, 37(1), 1994, pp. 182-188
The influence of environments on the properties of the surface films f
ormed with molybdenum dithiocarbamate (MoDTC) was examined under a rec
iprocating sliding condition. MoS2 was formed on the rubbing surfaces
in air and oxygen, and molybdenum compounds with an oxidation state lo
wer than MoS2 were produced in nitrogen and argon. The surface film co
mposed Of MoS2 was effective in reducing the friction and wear, while
the molybdenum compound formed in nitrogen or argon had no ability to
prevent direct contact between the rubbing surfaces and to reduce the
friction. It was a necessary condition for forming the surface film co
mposed Of MoS2 that the environment to be rubbed contained oxygen at a
concentration above a certain level.