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Tetragonal ZrO-3 mol% YO (3Y-TZP) coated with CePOwas synthesized by a co-precipitation method and the effects of CePO content and sintering temperature on its mechanical properties were investigated. The microstructure and phase composition of the products were characterized using scanning and transmission electron microscopy as well as X-ray diffraction, respectively. The machinability index of CePO-coated zirconia was calculated to be 1.05 when the CePO content is 25 wt.%. The sample hardness, bending strength and fracture toughness are 7.08 GPa, 457.85 MPa and 9.75 MPa.m