Structure of Shaped Sapphire Grown From Multicapillary Dies

Peculiarities in grain structure development have been studied in sapphire crystals grown with multicapillary channels in the die to feed melt to the crystallization zone. A new mechanism of grain boundary formation based on gas-bubble collapse at the crystal /melt interface is proposed. Photomicrog...

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Bibliographic Details
Published in:Journal of crystal growth 1989-11, Vol.104 (1), p.165-168
Main Authors: Dobrovinskaya, E R, Litvinov, L A, Pischik, V V
Format: Article
Language:English
Online Access:Get full text
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Summary:Peculiarities in grain structure development have been studied in sapphire crystals grown with multicapillary channels in the die to feed melt to the crystallization zone. A new mechanism of grain boundary formation based on gas-bubble collapse at the crystal /melt interface is proposed. Photomicrographs. 6 ref.--AA
ISSN:0022-0248