A STUDY OF THE ANTIWEAR AND FRICTION-REDUCING PROPERTIES OF THE LUBRICANT ADDITIVE, NANOMETER ZINC BORATE

Nanometer crystal zinc berate with a particle size of 20-50 nm was pre pared using the ethanol supercritical fluid drying technique. Tribolog y properties of 500 SN oil containing nanometer zinc berate particles thus prepared were measured. Results indicated that compared with the base oil the wear resistance and load-carrying capacity of the oil wer e improved and the friction coefficient was decreased. There was an op timal content of zinc berate, and the corresponding oil gave the highe st maximum nonseized load. Diboron trioxide was formed and tribochemic al boronization took place in friction. Nanometer zinc berate took eff ect by deposition of diboron trioxide on the rubbing surface and tribo chemical boronization. (C) 1998 Published by Elsevier Science Ltd. All rights reserved.