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Improvement of the Tribological Properties of Alumina Coatings by Zirconia Addition
| Content Provider | MDPI |
|---|---|
| Author | Romualdas, Kėželis Giedrius, Gecevičius Vytautas, Čapas Mathew, Jacob Shiby Marcinauskas, Liutauras Kalin, Mitjan Kavaliauskas, Žydrūnas |
| Copyright Year | 2021 |
| Description | $Al_{2}O_{3}$ and $Al_{2}O_{3}-ZrO_{2}$ 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 $Al_{2}O_{3}$ coatings were composed of $β-Al_{2}O_{3}$, $α-Al_{2}O_{3}$, and $γ-Al_{2}O_{3}$ 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 $Al_{2}O_{3}$ and $Al_{2}O_{3}-ZrO_{2}$ 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 $Al_{2}O_{3}-ZrO_{2}$ coatings were at least three times lower compared to $Al_{2}O_{3}$ coatings. |
| Starting Page | 991 |
| e-ISSN | 20796412 |
| DOI | 10.3390/coatings11080991 |
| Journal | Coatings |
| Issue Number | 8 |
| Volume Number | 11 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2021-08-20 |
| Access Restriction | Open |
| Subject Keyword | Coatings Coatings and Films Plasma Spraying Air-hydrogen Plasma Alumina-zirconia Tribology Friction Coefficient |
| Content Type | Text |
| Resource Type | Article |
