中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 23 No. 10 October 2013 |
（School of Metallurgy and Materials Engineering, University College of Engineering,
University of Tehran, Tehran, Iran）
Abstract:Effects of current density, duty cycle and frequency on microstructure and particles content of electrodeposited Co-BN (hexagonal) nano composite coatings were analyzed by SEM, FESEM, EDS, AFM and XRD techniques. The microhardness, tribological behavior and wear mechanism were also investigated. Generally, as the current density and frequency increased, the particles content and microhardness of the coatings increased firstly and then decreased. Moreover, by reducing duty cycle, more particles were incorporated and higher microhardness was obtained. The best tribological behavior was achieved under the conditions: duty cycle of 10%, frequency of 50 Hz and current density of 100 mA/cm2.
Key words: Co-BN coating; frequency; duty cycle; electrodeposition; composite; microhardness; tribological behavior
