Influence of Electrolyte Compositions and Electrical Parameters on Thermal Properties of Micro-Arc Oxidized AZ91 Alloy

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dc.authorid0000-0001-7670-2437en_US
dc.contributor.authorSelvi, Ekin
dc.contributor.authorMuhaffel, Faiz
dc.contributor.authorYürektürk, Yakup
dc.contributor.authorVanli, Ali Serdar
dc.contributor.authorBaydogan, Murat
dc.date.accessioned2022-08-05T13:28:45Z
dc.date.available2022-08-05T13:28:45Z
dc.date.issued2021en_US
dc.departmentBTÜ, Mühendislik ve Doğa Bilimleri Fakültesi, Metalurji ve Malzeme Mühendisliği Bölümüen_US
dc.description.abstractIn this study, AZ91 Mg alloy was micro-arc oxidized using different voltages in silicate- and aluminate/phosphate-based (dual) electrolytes that included K2ZrF6 or Na2ZrO3 as the Zr source for synthesizing ZrO2 in the micro-arc oxidation (MAO) coatings. Structural characterizations were done by using scanning electron microscopy and x-ray diffraction techniques. MAO coating characteristics of different samples were compared by measuring coating thickness, surface roughness, average pore size, and total pore fraction. Both hardness and pull-off tests were conducted to characterize the mechanical properties of the coatings. Thermal conductivity measurements and thermal shock tests were also carried out to evaluate the effect of the electrolyte composition and the type of Zr containing compound. It was found that the equivalent thermal conductivity of the MAOed samples can be reduced up to 30% compared to the bare AZ91 alloy. The decrease of the thermal conductivity was mainly attributed to formation of a thicker and denser MAO coating, and the incorporation of ZrO2 phase into the fabricated MAO coating. Finally, increased thermal shock resistance was strongly correlated with a lower hardness and higher cohesive strength of the MAO coating, which also leads to smaller crack formation and spallation-free surface characteristics.en_US
dc.identifier.doi10.1007/s11665-021-06292-0en_US
dc.identifier.endpage1678en_US
dc.identifier.issn1059-9495
dc.identifier.issn1544-1024
dc.identifier.issue2en_US
dc.identifier.scopusqualityQ2en_US
dc.identifier.startpage1667en_US
dc.identifier.urihttps://hdl.handle.net/20.500.12885/2031
dc.identifier.volume31en_US
dc.identifier.wosqualityN/Aen_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.institutionauthorYürektürk, Yakup
dc.language.isoenen_US
dc.publisherSpringeren_US
dc.relation.ispartofJOURNAL OF MATERIALS ENGINEERING AND PERFORMANCEen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectmagnesium alloyen_US
dc.subjectmicro-arc oxidationen_US
dc.subjectthermal propertiesen_US
dc.subjectzirconiumen_US
dc.titleInfluence of Electrolyte Compositions and Electrical Parameters on Thermal Properties of Micro-Arc Oxidized AZ91 Alloyen_US
dc.typeArticleen_US

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