熔铸AZS33材料中Al_(2)O_(3)-ZrO_(2)共晶体结构研究  

Al_(2)O_(3)-ZrO_(2)eutectic structure in fused cast AZS33 refractories

作　　者：李欢 袁林 王俊涛 毛利民 魏瀚 苏士勋 Li Huan;Yuan Lin;Wang Juntao;Mao Limin;Wei Han;Su Shixun(Ruitai Materials Technology Co.,Ltd.,China Building Materials Academy Co.,Ltd.,Beijing 100024,China;不详)

机构地区：[1]中国建筑材料科学研究总院有限公司、瑞泰科技股份有限公司,北京100024 [2]瑞泰科技股份有限公司湘潭分公司,湖南湘潭411228

出　　处：《耐火材料》2023年第4期329-336,共8页Refractories

基　　金：中国建材集团关键核心技术攻关“揭榜挂帅”项目(2021HX0809)。

摘　　要：采用扫描电子显微镜(SEM)、光学显微镜(OM)、X射线衍射仪(XRD)等仪器研究了熔铸AZS33材料表面到内部的显微结构差异,尤其是Al_(2)O_(3)-ZrO_(2)共晶体的结晶形态以及共晶体中Al_(2)O_(3)、ZrO_(2)物相共存关系的变化。结果表明:AZS33材料中Al_(2)O_(3)-ZrO_(2)共晶体主要呈胞状形态,是熔体凝固时的成分过冷造成的。AZS33材料中的Al_(2)O_(3)-ZrO_(2)共晶体主要以小平面-非小平面的方式耦合生长,Al_(2)O_(3)结晶的各向异性控制着共晶体的结晶生长过程。在内部结晶区,柱状或胞状Al_(2)O_(3)-ZrO_(2)共晶体边缘的斜锆石形态发生“粒状”向“棒状”的转变是结晶潜热的释放和最小界面能共同作用的结果。The microstructure differences of fused cast AZS33 refractories from surface to interior were examined using a scanning electron microscope(SEM),an optical microscope(OM),an X-ray diffractometer(XRD),etc.especially the crystal morphology of Al_(2)O_(3)-ZrO_(2)eutectic and the coexistence relationship of Al_(2)O_(3)and ZrO_(2)phases in the eutectic.The results show that the cellular morphology of the Al_(2)O_(3)-ZrO_(2)eutectic in AZS33 is primarily attributed to the supercooling of the melt during solidification.The growth of the Al_(2)O_(3)-ZrO_(2)eutectic in AZS33 primarily occurs through the coupled growth of faceted and non-faceted phases;the crystalline growth process of Al_(2)O_(3)-ZrO_(2)eutectic is influenced by the anisotropy of Al_(2)O_(3)crystallization.In the internal crystallization region,the baddeleyite at the edge of the columnar/cellular Al_(2)O_(3)-ZrO_(2)eutectic undergoes a transformation from“granular”to“rod”.This transformation is a combined result of the crystallization latent heat release and the minimum interface energy.

关 键 词：熔铸AZS Al_(2)O_(3)-ZrO_(2)共晶体 结晶形态 显微结构 

分 类 号：TQ175[化学工程—硅酸盐工业]