The in situ observation of faceted dendrite growth during the directional solidification of GaSb. (15th July 2019)

• Record Type: Journal Article
• Authors: Shiga, Keiji; Kawano, Masato; Maeda, Kensaku; Morito, Haruhiko; Fujiwara, Kozo
• Is Part Of: Scripta materialia. Number 168(2019)
• Page Start: 56
• Page End: 60
• Publication Date: 2019-07-15
• Subjects: Compound semiconductors -- Dendritic growth -- Directional solidification -- Twinning; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2019.04.022
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: In this work, crystal–melt interfaces were directly observed during the directional solidification of molten GaSb having a stoichiometric composition, and the formation of dendrite structures was studied. With increases in growth velocity, the planar crystal–melt interface became unstable and dendrite growth was initiated. Dendrites having {111} facets were found to grow in either the 〈110〉 or 〈112〉 directions, and a pair of twin boundaries was identified at the center of a dendrite. The results show that the growth of dendrites in GaSb is associated with nucleation at twin-related reentrant corners. Graphical abstract: Unlabelled Image