The chemical precipitation method was employed to prepare uniform spherical SrMoO4 powders. The ZrO2 (3 mol% Y2O3)–20 wt% Al2O3 (TZ3Y20A) matrix composites incorporating SrMoO4 were fabricated by spark plasma sintering, and their tribological properties were tested under dry sliding against Al2O3 balls from room temperature to 800 °C. Compared with TZ3Y20A ceramic, TZ3Y20A–20 wt% SrMoO4 composite has lower friction coefficients of 0.26–0.55 from room temperature to 800 °C. The wear rates are of the order of 10−7 mm3/(Nm) at room temperature and 200 °C and 10−5–10−4 mm3/(Nm) at 400, 600, and 800 °C. The lubricating film consisting mainly of SrMoO4, which spreads on the worn tracks during sliding progress, plays a critical role in the improvement in the tribological properties of the composites.
Tribology Letters – Springer Journals
Published: Aug 16, 2017
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