Improving wear resistance of plasma-sprayed calcia and magnesia-stabilized zirconia mixed coating: roles of phase stability and microstructure.

ABSTRACT: The phase stability and microstructure of ZrO₂-5CaO and ZrO₂-24MgO mixed coating (wt%) by air plasma spraying on 304 stainless steel substrates were investigated. A Ni-5Al (wt%) metallic bond coating was firstly sprayed between the substrate and the ceramic top layer. The results were compared with the individual coatings of ZrO₂-5CaO and ZrO₂-24MgO for a better understanding of the correlation between their microstructures and mechanical properties. Mixed zirconia coating was found to have a mixture of cubic and tetragonal phases that stabilized under different plasma spray conditions. Microscopic observations and elemental composition analysis of as-sprayed mixed coating showed that modified ceramic-matrix grains had been formed. Microsized ZrO

SUBMITTER: Hafez MA 

PROVIDER: S-EPMC7733493 | biostudies-literature | 2020 Dec

REPOSITORIES: biostudies-literature