S. Mahdavi and S. R. Allahkaram
Investigation of Tribological Behavior of Electrodeposited Cr, CoCr and CoCrTiO2 NanoComposite Coatings
787 - 791
2015
9
7
International Journal of Materials and Metallurgical Engineering
https://publications.waset.org/pdf/10001617
https://publications.waset.org/vol/103
World Academy of Science, Engineering and Technology
Electrodeposition is a simple and economic technique
for precision coating of different shaped substrates with pure metal,
alloy or composite films. Dc electrodeposition was used to produce
Cr, CoCr and CoCrTiO2 nanocomposite coatings from Cr(III)
based electrolytes onto 316L SS substrates. The effects of TiO2 nanoparticles
concentration on codeposition of these particles along with
Cr content and microhardness of the coatings were investigated.
Morphology of the Cr, CoCr and CoCrTiO2 coatings besides their
tribological behavior were studied. The results showed that increment
of TiO2 nanoparticles concentration from 0 to 30 g L1 in the bath
increased their codeposition and Cr content of the coatings from 0 to
3.5 wt. and from 23.7 to 31.2 wt., respectively. Microhardness of
Cr coating was about 920 Hv which was higher than CoCr and even
CoCrTiO2 films. Microhardness of CoCr and CoCrTiO2 coatings
were improved by increasing their Cr and TiO2 content. All the
coatings had nodular morphology and contained microcracks.
Nodules sizes and the number of microcracks in the alloy and
composite coatings were lower than the Cr film. Wear results
revealed that the CoCrTiO2 coating had the lowest wear loss
between all the samples, while the Cr film had the worst wear
resistance.
Open Science Index 103, 2015