Dendrite Growth of Intermetallic Compounds with Large Crystallographic Anisotropy(<Special Issue>Prospective Crystal Growth)

DOI Web Site 18 References

Bibliographic Information

Other Title
  • 金属間化合物のデンドライト成長メカニズム : 結晶構造の異方性がもたらす多様性(<特集>期待される結晶成長)
  • 金属間化合物のデンドライト成長メカニズム--結晶構造の異方性がもたらす多様性
  • キンゾクカン カゴウブツ ノ デンドライト セイチョウ メカニズム ケッショウ コウゾウ ノ イホウセイ ガ モタラス タヨウセイ

Search this article

Abstract

In order to elucidate the solidification process of anisotropic intermetallic compounds into the undercooled melt, the containerless solidification of α-FeSi_2 was carried out using an electromagnetic levitator with a high speed video recorder. With increasing the undercooling, the shape of the growing crystal drastically changed from a polyhedron-type crystal to a sword-like dendrite crystal. Particularly, the sword-like crystal shows the six-fold symmetry, despite the equilibrium lattice structure ofα-FeSi_2 is tetragonal. The growth velocity analysis based on the dendrite growth model suggests that the interfacial attachment kinetics dominantly control the growth process. Moreover, based on the analysis of crystallographic orientation using an electron backscattering pattern apparatus, we propose the hypothesis that the six-fold symmetry resulted from the three different crystals growing into the <110> direction of the (111) plane of the metastable cubic phase of γ-FeSi_2.

Journal

References(18)*help

See more

Details 詳細情報について

Report a problem

Back to top