Preparation of Ni-CNT composite coatings on aluminum substrate and its friction and wear behavior

来源期刊：中国有色金属学报(英文版)2004年第5期

论文作者：涂江平 朱丽萍 陈卫祥 赵新兵 刘芙 张孝彬

文章页码：880 - 884

Key words：carbon nanotubes (CNTs); composite coating; electrodeposition; friction and wear

Abstract: Nickel-carbon nanotube(CNT) composite coatings with a Zn-Ni interlayer were prepared by electrodeposition technique on aluminum substrate. The effects of CNT concentration in plating bath on the volume fraction of CNTs in the deposits and the coating growth rate were investigated. The friction and wear behavior of the Ni-CNT composite coatings were examined using a pin-on-disk wear tester under dry sliding conditions at a sliding speed of 0.062 3 m/s and load range from 12 N to 150 N. Because of the reinforcement of CNTs in the composite coatings, at lower applied loads, the wear resistance was improved with increasing volume fraction of CNTs. Since cracking and peeling occur on the worn surface, the wear rates of composite coatings with high volume fraction of CNTs increase rapidly at higher applied loads. The friction coefficient of the composite coatings decreases with the increasing volume fraction of CNTs due to the reinforcement and self-lubrication of CNTs.