The Wear Resistance of Cr-C-Al₂O₃ Composite Deposits Prepared on a Cu Substrate using Cr³⁺-based Plating Baths

E-ISSN： 2261-236x|67|issue|04021-04021

ISSN： 2261-236x

Source： MATEC Web of conference, Vol.67, Iss.issue, 2016-07, pp. : 04021-04021

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Abstract

Cr-C-Al₂O₃ deposits with different Al₂O₃ concentrations were successfully prepared on a Cu substrate using Cr³⁺-based electroplating baths. The microstructures of the Cr-C-Al₂O₃ deposits were examined using optical, scanning and transmission electron microscopes. The hardness values, the corrosion and wear resistance of the Cr-C and Cr-C-Al₂O₃ deposited specimens were evaluated. Based on the experimental results, the hardness values of the Cr-C-Al₂O₃ deposits increased with increasing Al₂O₃ concentration in the electroplating bath. According to our microstructure study, Al₂O₃ nanoparticles are uniformly distributed within the Cr-C deposits after electroplating in a Cr³⁺-based plating bath. The wear resistance of the Cr-C-deposited specimens could be noticeably improved by adding Al2O3 nanoparticles to the deposit. The Cr-C-Al₂O₃ deposited specimens, which were prepared in a plating bath with an Al₂O₃ concentration of 50 gL^-1, had a relatively high wear resistance compared to the other specimens.