Influence of Cooling Rate on Mineral Composition of Zirconia Metering Nozzles
The zirconia metering nozzles prepared from magnesia partly stabilized zirconia were researched in this paper.The operational environment of zirconia metering nozzles was simulated by keeping metering nozzles at 1 540 ℃ for 5 hours, and then the nozzles were quenched in water to keep the phase composition at high temperatures.The analyzing methods were X-ray diffraction and scanning electron microscope (SEM).The metering nozzles after water quenching were compared with the same kind of metering nozzles after slow cooling according to the actual technical process in terms of mineral composition and microstructure.The results show that for the zirconia metering nozzle after stow cooling, the c-ZrO2 and m-ZrO2 contents of are 41% and 59%, respectively;for water quenching, c-ZrO2 and m-ZrO2 contents are 57% and 43%, respectively.So, in the process of casting about 16% of m-ZrO2 is transferred into c-ZrO2.Compared to the phase composition of the ex-factory products, c-ZrO2 content increases by 39%.The effect of phase transformation on the product performance still needs a further research.
magnesia partly stabilized zirconia (Mg-PSZ) zirconia metering nozzle phase composition water quenching
ZHAO Zhilong XUN Qunhu ZHAO Liang
Xian University of Architecture and Technology,School of Materials and Mineral Resources,Xian 7100 Xian University of Architecture and Technology,School of Materials and Mineral Resources,Xian 7100
国际会议
西安
英文
1-3
2016-09-20（万方平台首次上网日期，不代表论文的发表时间）