Improvement of the tribological properties of alumina coatings by zirconia addition

Jacob Shiby Mathew (Author), Liutauras Marcinauskas (Author), Mitjan Kalin (Author), Romualdas Kėželis (Author), Žydrūnas Kavaliauskas (Author), Giedrius Gecevičius (Author), Vytautas Čapas (Author)

Abstract

Al2O3 and Al2O3-ZrO2 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 Al2O3 coatings were composed of ß-Al2O3, a-Al2O3, and y-Al2O3 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 Al2O3 and Al2O3-ZrO2 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 Al2O3-ZrO2 coatings were at least three times lower compared to Al2O3 coatings.

Keywords

tribologija;napraševanje s plazmo;zrak-vodikova plazma;cirkonijev dioksid;koeficient trenja;tribology;plasma spraying;air-hydrogen plasma;alumina-zirconia;friction coefficient;

Data

Language:	English
Year of publishing:	2021
Typology:	1.01 - Original Scientific Article
Organization:	UL FS - Faculty of Mechanical Engineering
UDC:	539.92
COBISS:	73681923
ISSN:	2079-6412
Views:	101
Downloads:	28
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	Slovenian
Secondary keywords:	tribologija;napraševanje s plazmo;zrak-vodikova plazma;cirkonijev dioksid;koeficient trenja;
Type (COBISS):	Article
Pages:	str. 1-14
Issue:	ǂVol. ǂ11
Chronology:	2021
DOI:	10.3390/coatings11080991
ID:	15033877