Izvorni znanstveni članak
Comparison of Erosion Rate of Slip Cast Monolithic and Composite Ceramics
Lidija Ćurković
; Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, Zagreb, Croatia
Zrinka Švagelj
; Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, Zagreb, Croatia
Krešimir Grilec
; Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, Zagreb, Croatia
Gorana Baršić
; Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, Zagreb, Croatia
Vilko Mandić
; Faculty of Chemical Engineering and Technology, University of Zagreb, Zagreb, Croatia
Irena Žmak
; Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, Zagreb, Croatia
Ivana Gabelica
; Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, Zagreb, Croatia
Sažetak
In this paper, the solid particle erosion wear of slip cast monolithic alumina (Al2O3) and alumina–zirconia (Al2O3–
ZrO2) composite ceramics was investigated. Three groups of samples were prepared: (i) monolithic alumina (Al2O3);
(ii) composite alumina–zirconia (Al2O3–ZrO2) containing 99 wt. % Al2O3 and 1 wt. % ZrO2 and (iii) composite
alumina–zirconia (Al2O3–ZrO2) containing 90 wt. % Al2O3 and 10 wt. % ZrO2. X-ray diffraction and scanning electron
microscopy (SEM) were used to investigate the phase composition, the crystallite size, and the morphology of the
sintered monolithic and composite ceramic samples. The erosive wear behaviour was studied under different impact
angles (30°, 60°, 90°) of silicon carbide (SiC) particles as erodent. Erosion mechanisms of all prepared ceramic
samples were evaluated by measuring the surface roughness parameters (Ra, Rz, and Rmax) and the erosion rate. The
obtained results showed that the tribological properties of the monolithic Al2O3 can be improved with the addition of
ZrO2. It was found that the erosion resistance increases with the increasing amount of ZrO2 in the composite Al2O3–
ZrO2 ceramics. It was found that ZrO2 grains are homogenously distributed in the alumina matrix, zirconia grain size
is smaller than alumina grains, and that the alumina grain size is reduced by the addition of zirconia.
Ključne riječi
slip casting, erosion rate, monolithic alumina, alumina–zirconia composite ceramics
Hrčak ID:
270511
URI
Datum izdavanja:
1.11.2021.
Posjeta: 449 *