Erosion mechanisms of slip cast composite Al2O3 - ZrO2 ceramics

Sakoman, Matija and Grilec, Krešimir and Ćurković, Lidija and Majić Renjo, Marijana and Sladojević, Milan (2014) Erosion mechanisms of slip cast composite Al2O3 - ZrO2 ceramics. = Erosion mechanisms of slip cast composite Al2O3 - ZrO2 ceramics. In: International conference MATRIB 2014 - materials, tribology, recycling, Vela Luka, Hrvatska.

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Abstract

In this paper highly concentrated (70 wt. %) aqueous Al2O3 and Al2O3–t-ZrO2 suspensions were prepared. Dispersant DOLAPIX CE64 was used for stabilization. Green bodies were formed by slip casting process in plaster mould. After drying, green bodies were sintered at a temperature of 1650 °C. SEM-EDS analysis of prepared samples confirmed the homogeneous distribution of ZrO2 in Al2O3 matrix. Erosive wear resistance of sintered monolithic Al2O3 and composite Al2O3–t-ZrO2 ceramics was determined by SEM analysis of the sample surface morphology before and after erosion at impact angle of 90° and SiO2 as erodent particles. Surface morphology analysis after erosion showed that wear scars were significantly larger on Al2O3 than on Al2O3–t-ZrO2 samples. All conducted tests showed that tribological properties of monolithic Al2O3 can be improved with the addition of t-ZrO2.

Item Type: Conference or Workshop Item (Lecture)
Keywords (Croatian): Al2O3, Al2O3 - t - ZrO2, slip casting, solid particle erosion
Subjects: TECHNICAL SCIENCE > Mechanical Engineering
Divisions: 1000 Department of Materials > 1010 Chair of Materials and Tribology
Date Deposited: 20 Sep 2016 14:02
Last Modified: 20 Sep 2016 14:02
URI: http://repozitorij.fsb.hr/id/eprint/6518

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