%0 Journal Article
%A Mingo, B.
%A Arrabal Durán, Raúl
%A Mohedano Sánchez, Marta
%A Pardo Gutiérrez Del Cid, Ángel
%A Matykina, Endzhe
%T Corrosion and wear of PEO coated AZ91/SiC composites
%D 2017
%U https://hdl.handle.net/20.500.14352/107284
%X In this work, corrosion and wear resistance of uncoated and PEO coated AZ91/SiC/0-10p composites manufactured by semisolid processing is evaluated by corrosion tests in saline solution and ball-on-disc tests. AZ91/SiC composites show a globular microstructure with SiC clusters located at the interglobular regions. PEO coatings reveal a trilayered structure with thicker, less porous and softer regions at the locations of SiC clusters. Corrosion rate increases with increasing the volume fraction of reinforcement, which shows a cathodic activity and disrupts the continuity of the β-phase network. PEO improves the corrosion resistance, but it is also negatively influenced by the presence of the reinforcement. Tribological tests show a positive effect of the reinforcement on uncoated materials, whereas an opposite effect is found on PEO coated materials, probably due to the detachment of SiC particles from the coating
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