Abstract

It is expatiated that nano‐CeO2 is fabricated by the direct sedimentation method. The components and particles diameter of nano‐CeO2 powders are analyzed by XRD and SEM . The thermodynamic analysis and acting mechanism of nano‐CeO2 with Al in Fe matrix composites are researched, which shows that the reaction is generated between CeO2 and Al in the composite, that is, 3CeO2+4Al→2Al2O3+3[Ce], which obtains Al2O3 and active [Ce] during the sintering process. The active [Ce] can improve the performance of CeO2/Fe matrix composites. The suitable amount of CeO2 is about 0.05% in CeO2/Fe matrix composites. SEM fracture analysis shows that the toughness sockets in nano‐CeO2/Fe matrix composites are more than those in no‐added nano‐CeO2 composites, which can explain that adding nano‐CeO2 into Fe matrix composite, the toughness of the composite is improved significantly. Applied nano‐CeO2 to Fe matrix diamond saw blades shows that Fe matrix diamond saw blade is sharper and of longer cutting life than that with no‐added nano‐CeO2.

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