engleski

Evaluation of surface roughness of slip cast composite Al2O3-ZrO2 ceramics in solid particle erosion

In this paper, surface roughness parameters (Ra, Rmax, Rz) of monolithic and composite ceramics produced by slip casting were monitored before and after solid particle erosion. Prepared samples were monolithic Al2O3 and composite Al2O3–t-ZrO2 ceramics (composition: 95 wt. % Al2O3 – 5 wt. % t-ZrO2 and 90 wt. % Al2O3 – 10 wt. % t-ZrO2). The erosive wear behaviour was studied at the impact angle of 90°, using dry silica sand (SiO2) as an erodent. Obtained results indicated that values of roughness parameters increased after erosion, and the largest increase was observed for monolithic Al2O3 ceramics. Surface roughness parameter values decrease with the increase of ZrO2 content. Obtained results showed that tribological properties of monolithic Al2O3 can be improved with the addition of t-ZrO2.

Al2O3 ; Al2O3–t-ZrO2 ceramics ; solid particle erosion

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