Effects of Additive CeO_2 on Thermal Shock Resistance of Cr_2O_3 Coating

The influence of additive CeO 2 with different content on the thermal shock resistance of plasma sprayed Cr 2O 3 coating was studied.It is found that the addition of 3.0%CeO 2 to Cr 2O 3 layer reduces the amount and the size of the pores in ceramic layer,and thus increases the resistance to thermal shock.The thermal shock failure of ceramic coating is essentially the fatigue failure induced by cyclic thermal stress during repeated heating and cooling.