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Cast-infiltration was used for preparing ZTA (ZrO2 toughened Al2O3) particles reinforced steel composites with the particle size range of 0.5~1, 1~2, and 2~3mm.Properties of abrasive wear under high temperature such as 500 ℃, 700 ℃, and 900 ℃ was studied, and the wear mechanism was discussed combine with SEM pictures.