INVESTIGADORES
FURLONG Octavio Javier
artículos
Título:
DEPOSITED AND REACTIVELY FORMED EXTREME-PRESSURE LUBRICANT FILMS: A COMPARATIVE STUDY IN UHV
Autor/es:
FENG GAO; OCTAVIO JAVIER FURLONG; WILFRED T. TYSOE
Revista:
ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
Editorial:
AMER CHEMICAL SOC
Referencias:
Año: 2004 vol. 228 p. 468 - 468
ISSN:
0065-7727
Resumen:
Extreme-pressure lubricant additives (e.g., CCl4) react with iron at the hot interface to form a lubricant film that composes mainly FeCl2 and sometimes carbonaceous species. FeCl2 films are both directly deposited onto iron foil and reactively formed (CCl4 + Fe at 600 K) and their tribological properties investigated with an UHV-compatible tribometer. It is found that friction coefficient reaches a low limiting value following monolayer FeCl2 film saturation in both cases. The limiting friction coefficient for the reactively formed film is lower than that of the deposited film, presumably because carbon diffuses into iron bulk to increase the substrate hardness. Film mobility and transfer are found in both cases.
