Journal
TRIBOLOGY INTERNATIONAL
Volume 98, Issue -, Pages 253-260Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.triboint.2016.02.029
Keywords
PEO; Wear; Nano-composite coating; AZ31B Mg Alloys
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AZ31B Mg alloy specimens were coated by PEO technique in WC nano-powder containing phosphate based electrolyte under constant current densities. Wear rate and COF diagrams were plotted in order to investigation of WC nano -particles presence and it was found that nano-particle presence can decrease wear rate and COF significantly down to 77% and 55%, respectively. Cross sectional imaging showed that coating thickness increase with coating time and in case of nano-particle containing coatings become more compact but thickness decreases slightly. Investigation of surface morphology indicated that in presence of nano-powder, porosity as well as mean diameter of pores decreased, but prolonging coating time even in presence of nano-powder, led to mean diameter of pores reached up to 8.34 gm. Presence of nano-powders, also increased hardness of coatings considerably. (C) 2016 Elsevier Ltd. All rights reserved.
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