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Tribological properties of alumina-zirconia composite coatings prepared by plasma sprayingMathew, Jacob Shiby ...The intent of this research was to determine the tribological trends of zirconia as an additive to a plasma-sprayed alumina coating matrix. For the deposition process, pure alumina and ... alumina-withzirconia (5%, 10%) weight percentages were employed to be coated on steel substrates using an airhydrogen plasma. The torch power was set to ~40 kW. The surface roughness for the alumina coatings were in the range from 2.6-3.2 [micro]m and with additive percentages of zirconia, it was found to vary between 3.0-3.7 [micro]m. XRD measurements indicated that the predominant phase in the alumina-zirconia coatings was tetragonal-ZrO2 (t-ZrO2) and with alumina, it was [alfa]-Al2O3 and [gama]-Al2O3. The tribological properties such as the friction coefficient and the wear-rate of the alumina-composite coatings had been inspected to evaluate its dependence on the type and concentration of the additive powders. An increase in friction-coefficient was observed with the addition of zirconia. The normalized wear rates were in the range of ~10-5 mm3 /Nm for the composite coatings with certain exceptions.Source: Serbiatrib '19 : proceedings on engineering sciences (Str. 193-196)Type of material - conference contributionPublish date - 2019Language - englishCOBISS.SI-ID - 62589699
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Mathew, Jacob Shiby | |
Marcinauskas, Liutauras | |
Milieška, Mindaugas | |
Kalin, Mitjan | 14556 |
Keželis, Romualdas |
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