中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
Vol. 11 No. 1 February 2001 |
(College of Electromechanical Engineering, Central South University,
Changsha 410083, P.R.China)
Abstract:Low-angle X-ray diffraction has been applied to analyze the structure of stearic acid LB films and self-grown surface adsorbed films of aluminium product metalworking lubricants. The results show that LB films exhibit a good layer like ordered structure in the normal direction of film-carrying surface, while in the tangential direction, they do not show a cyclically ordered molecular arrangement; as for the self-grown surface adsorbed films of aluminium sheet and strip metalworking lubricants, their molecules are orderly arranged to certain degree in both the tangential and the normal directions of film-carrying surface, and they have a short-range ordered structure. Moreover, the better the orientation of normal molecules is, the higher the oil film strength is, and the smaller the friction factor is.
Key words: LB film; surface adsorbed film; molecular arrangement structure; lubricity