Fabrication of Nano-CeO2 and Application of Nano-CeO2 in Fe Matrix Composites

الملخص EN

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.