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Crystallographic‐Orientation‐Dependent Dissolution Behavior of Sapphire in Anorthite Liquid Containing Chromia
Author(s) -
Park JongKeuk,
Kim DohYeon,
Lee HoYong,
Blendell John,
Handwerker Carol
Publication year - 2003
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.2003.tb03410.x
Subject(s) - anorthite , sapphire , materials science , dissolution , crystallography , anisotropy , instability , plane (geometry) , chromia , crystal (programming language) , mineralogy , composite material , chemistry , optics , geometry , alloy , laser , physics , mathematics , mechanics , computer science , programming language
A sapphire single crystal was put into anorthite powders containing Cr 2 O 3 and then heat‐treated at 1600°C. The resultant morphologies of the sapphire—anorthite‐liquid interfaces were corrugated and quite different depending on the crystallographic orientation of the sapphire; all the planes perpendicular to the C> ‐plane showed fingerlike morphologies, while long parallel segments were detached from the basal C ‐plane. The results were interpreted in terms of coherency‐strain‐induced instability of the solid–liquid interface (ISLI) caused by the alloying of Cr 2 O 3 into sapphire. The difference in microstructural evolution depending on crystallographic orientation was explained in terms of strong anisotropy of the solid–liquid interface characteristics.