人工晶体学报2025，Vol.54Issue(12)：2136-2145,10.DOI:10.16553/j.cnki.issn1000-985x.2025.0141
微下拉法生长GdAlO3-Al2O3共晶微结构演化机理研究
Investigation on the Microstructural Evolution Mechanism of GdAlO3-Al2O3 Eutectics Grown by Micro-Pulling-Down Method
摘要
Abstract
GdAlO3(GAP)-Al2O3 oxide eutectic is widely used in high-temperature structural materials due to its high bending strength,excellent creep resistance and oxidation resistance at high temperature.As well known,the properties of eutectic materials are influenced directly by the microstructure of eutectic,and the microstructure of eutectic materials can be arranged in a certain direction through directional solidification technology.Micro-pulling-down method(μ-PD),as a directional solidification technology for crystal growth,has the advantages with large temperature gradient,wide growth rate range,short growth period,and visible growth process.In this work,GdAlO3(GAP)-Al2O3 eutectics were grown by μ-PD,and its microstructure was determined by XRD and SEM.The results show that the microstructure of the obtained eutectics was changed gradually from disorder to order with the increasing of growth rate.The microstructure of eutectic is also influenced by the temperature gradient and growth rate.The evolution mechanism of eutectic microstructure was investigated.By optimizing the growth conditions,large-scale eutectic materials with ordered microstructure are expected to be obtained,which have potential applications in the fields of high-resolution detection imaging,laser display and lighting,optical storage and optical temperature sensor.关键词
GdAlO3-Al2O3共晶/定向凝固/微下拉法/微结构演化Key words
GdAlO3-Al2O3 eutectic/directional solidification/micro-pulling down method/microstructural evolution分类
数理科学引用本文复制引用
LIU Zhen,XU Jintao,ZHU Shanlin,LIAO Canyuan,HU Hongwei,ZHONG Xingyuan,ZHONG Jiuping..微下拉法生长GdAlO3-Al2O3共晶微结构演化机理研究[J].人工晶体学报,2025,54(12):2136-2145,10.基金项目
国家自然科学基金(62275276) （62275276）
中山大学大学生创新训练项目(20250061) （20250061）
