Composition, structure and mechanical properties of metal oxide coatings produced on titanium using plasma spraying and modified by micro-arc oxidation. Issue 11 (1st August 2018)

• Record Type: Journal Article
• Authors: Koshuro, Vladimir; Fomin, Aleksandr; Rodionov, Igor
• Is Part Of: Ceramics international. Volume 44:Issue 11(2018)
• Page Start: 12593
• Page End: 12599
• Publication Date: 2018-08-01
• Subjects: Alumina -- Plasma spraying -- Titania -- Micro-arc oxidation; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2018.04.056
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Metal oxide coatings on VT6 titanium alloy were formed by plasma spraying of aluminum oxide powder and subsequent microarc oxidation at a current density from 1 to 3 kA/m 2 . As a result of combined treatment, metal oxide coatings consisting of a mixture of aluminum and titanium oxides were obtained on the surface of titanium samples. The most pronounced changes in the morphology of the plasma-sprayed coating were observed at the highest current density of 3 kA/m 2 . The open porosity decreased from 56% to 38% due to the modification by micro-arc discharges, whereas the microhardness increased from 1013 ± 150 HV to 1639 ± 31 HV.