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Improvement of the tribological properties of alumina coatings by zirconia addition

Coatings, ISSN: 2079-6412, Vol: 11, Issue: 8
2021
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Article Description

AlO and AlO-ZrO coatings were deposited on stainless steel using atmospheric plasma spraying. The influence of arc current and zirconia addition on the surface morphology of the coating, phase composition and tribological properties under dry sliding conditions were investigated. The addition of zirconia reduced the surface roughness of the coatings. The X-ray diffraction measurements indicated that the AlO coatings were composed of β-AlO, α-AlO, and γ-AlO phases. The addition of zirconia led to the formation of tetragonal and monoclinic phases of zirconia in the as-sprayed coatings. The friction coefficients of AlO and AlO-ZrO coatings were similar and varied in the range of 0.72–0.75. The specific wear rates of the as-sprayed coatings were reduced with the increase of arc current. It was obtained that the wear rates of the AlO-ZrO coatings were at least three times lower compared to AlO coatings.

Bibliographic Details

Jacob Shiby Mathew; Liutauras Marcinauskas; Romualdas Kėželis; Žydrūnas Kavaliauskas; Mitjan Kalin; Giedrius Gecevičius; Vytautas Čapas

MDPI AG

Physics and Astronomy; Materials Science

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