Convection effect on the structure of unidirectionally solidified eutectic InSb-NiSb alloys

被引：0

作者：

Bryukvin, D.V. ^{[1
]}

Zemskov, V.S. ^{[1
]}

Raukhman, M.R. ^{[1
]}

Shalimov, V.P. ^{[1
]}

机构：

[1] Inst. Metall. i Materialoved., RAN, Moscow, Russia

来源：

Fizika i Khimiya Obrabotki Materialov | 2001年 / 05期

关键词：

Crystal structure - Crystallization - Eutectics - Heat convection - Indium alloys - Nickel alloys - Solid solutions;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

The comparative analysis of macro- and microstructure of unidirectionally solidified InSb-NiSb eutectic alloys produced under various convective conditions in a melt has been performed. These alloys were solidified by Czochralski and Bridgman methods on the Earth and by Bridgman method in microgravity conditions. It was found that when intensity of convective fluxes decreases, eutectic needles become more rectilinear, parallel and long. Also it was established that decreasing convection intensity leads to increasing needles density and decreasing the distance between them approximately on 20%. It does not confirm the theory of crystallization of alloys with exactly eutectic composition. Heterogeneity of structure of eutectic ingots were examined, which arise due to periodic change of temperature and occurring the plane part on the crystallization front.

引用

页码：79 / 89