20.500.12556/RUL-136173 Improvement of the tribological properties of alumina coatings by zirconia addition 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. tribology plasma spraying air-hydrogen plasma alumina-zirconia friction coefficient tribologija napraševanje s plazmo zrak-vodikova plazma cirkonijev dioksid koeficient trenja true false true Angleški jezik Slovenski jezik Članek v reviji 2022-04-14 12:06:19 2022-04-14 12:06:21 2022-09-15 04:13:30 0000-00-00 00:00:00 2021 0 0 14 str. iss. 8, art. 991 Vol. 11 2021 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 539.92 2079-6412 10.3390/coatings11080991 73681923 coatings-11-00991.pdf coatings-11-00991.pdf 1 DE28201733D0FDBF87B24479C45D8ABF b80e21adbdfbb260b048273342a2b012f4e26309625cdb8796d68495746995cf 019dc8b6-bbdb-11ec-8aca-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=155675 https://www.mdpi.com/2079-6412/11/8/991 1 7b0098c5-bbda-11ec-8aca-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=155674 Fakulteta za strojništvo 0 0 0