氧化锆质定径水口晶粒破裂损毁机制研究

Fracture mechanism of grains in zirconia metering nozzles

以连铸生产线用后MgO-Y2O3复合稳定氧化锆(以下简称为(Mg,Y)-PSZ)质定径水口残样为研究对象,通过X射线衍射仪对其原砖层、过渡层和变质层的物相组成进行检测,并通过扫描电镜和电子探针对各层的显微结构和微区化学组成进行观察和分析,研究了连铸过程中钢渣侵蚀对氧化锆质定径水口组成和结构的影响,在此基础上研究氧化锆质定径水口晶粒损毁过程和机制。

A residual sample of a MgO-Y2O3 composite stabilized zirconia metering nozzle after continuous casting was used as research objects,and the phase composition of the original brick layer,the transition layer and the corrosion layer were detected by X-ray diffraction.The microstructure and the micro-area chemical composition of the layers were observed and analyzed by a scanning electron microscope and an electron probe.The effect of the steel slag corrosion on the phase composition and microstructure of the zirconia metering nozzle during the continuous casting was studied.Based on this,the process and mechanism of the grain fracture in the zirconia metering nozzle were studied.