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On the morphology of <100>‐textured Germanium Crystallites in Zn—Ge Eutectic Alloy
Author(s) -
Vetter JÖRg,
Frühauf Joachim,
Schneider Helmut GÜNther
Publication year - 1984
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.2170190409
Subject(s) - eutectic system , crystallite , dendrite (mathematics) , germanium , alloy , materials science , morphology (biology) , crystallography , metallurgy , geometry , chemistry , mathematics , silicon , genetics , biology
Different geometry parameters for the cross‐like germanium crystallites (eutectic dendrites) of the Zn‐Ge eutectic alloys unidirectionally solidified have been related to the growth rate R and liquid temperature gradient G using linear regression analysis. It has been found that for eutectic dendrite spacing λ, balk length d and balk thickness b follow the relationship of the type w = C w R − r w G − g w ; C w is a constant. The spacing relationship of eutectic dendrites ( r λ = 0.21; g λ = 0.48) shows a similarity with published experimental and theoretical results on primary dendrite arm spacing ( r λ = 0.25; g λ = 0.5). It has been shown in terms of a profile ration λ/ d that for geometrical similar morphologies the relationship λ 2 R = const. is valid.