Y_2O_3-Nb/Y_2O_3复合梯度材料的研究

Y_2O_3-Nb/Y_2O_3 Gradient Material

采用一次成形烧结的方法成功制备了Y_2O_3-Nb/Y_2O_3复合梯度材料,并用XRD、SEM及EDS表征了其相组成和组织结构。结果表明该复合梯度材料中除气相外只有Y_2O_3相和Nb相,其中Nb以片层状和弥散点状两种形态分布在Y_2O_3基体中。测试了Y_2O_3-Nb/Y_2O_3复合梯度材料的室温三点弯曲强度,结果显示其弯曲强度高于纯Y_2O_3以及Y_2O_3-Nb复合材料,表明Y_2O_3梯度层与以Y_2O_3为基体的复合材料具有较高的结合强度。

Y_2O_3-Nb/Y_2O_3 gradient material was prepared by one step forming and one step sintering, and then was characterized by XRD, SEM and EDS. The results indicate that there are only Y_2O_3 phase and Nb phase besides the gas phase in the gradient material, and that Nb distributes in the Y_2O_3 base with flakes and dispersed particles. The three-point flexural strength of Y_2O_3-Nb/Y_2O_3 gradient material was tested at room temperature, which was found to be higher than that of Y_2O_3 and Y_2O_3-Nb composites, indicating that Y_2O_3 gradient layer and Y_2O_3 matrix composite have high bonding strength.