摘要
通过OM、SEM、EBSD等技术分析了不同凝固条件下共晶Si的生长行为。结果表明:共晶Si存在从平界面→胞状晶→树枝晶的转变过程。同一个共晶(团)晶粒的Si相和α相都不是单晶体。Al、Si两相共生生长过程中,共晶α可通过重复形核、亚晶界以及小角度晶界来调整生长位向以满足两相耦合生长的要求。
The growth behavior of eutectic Si under different solidification conditions was analyzed by using of OM, SEM, and EBSD. The results show that the eutectic Si has a transformation process from flat interface→cellular crystal→dendritic crystal. The Si phase and α phase in the same grain are not single crystals. During the co-growth process of Al and Si, eutectic α can adjust its growth position to meet the requirements of two-phase coupling growth by repeating nucleation, sub-grain boundary and small-angle grain boundary.
作者
周鹏飞
顾伟璐
陆从相
杨书根
孙瑜
ZHOU Peng-fei;GU Wei-lu;LU Cong-xiang;YANG Shu-gen;SUN Yu(Yancheng Polytechnic College,Yancheng 224005,Jiangsu,China;School of Material Science and Engineering,Yancheng Institute of Technology,Yancheng 224005,Jiangsu,China)
出处
《铸造》
CAS
北大核心
2022年第9期1095-1100,共6页
Foundry
基金
2022年度国家外国专家项目(G2022014146L)
2022年度江苏省高校基础科学自然科学面上项目(22KJD430011)
江苏省产学研合作项目(BY2022482,2021HX-67)
2019校级自然科学基金项目(ygy2019-04)。
关键词
共晶Si
胞状晶
树枝晶
耦合生长
eutectic Si
cellular crystal
dendritic crystal
coupling growth
