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Spontaneous Deformation Phenomena in Partially Crystallized Glasses
Author(s) -
SPROULL JAMES F.,
RINDONE GUY E.
Publication year - 1971
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.1151-2916.1971.tb12190.x
Subject(s) - crystallization , softening , materials science , deformation (meteorology) , rod , composite material , mineralogy , crystallography , thermodynamics , chemistry , physics , medicine , alternative medicine , pathology
Unusual deformation phenomena accompanying partial crystallization were observed during heat treatment in the softening temperature range of Li‐Na‐Si glasses. Glassy lumps or protuberances formed at the surfaces of fibers 0.5 mm in diameter; rods and plates showed even greater distortions, their original shapes often becoming unrecognizable. Liquid‐liquid immiscibility accompanying the crystallization of a 0.7Li 2 O.0.3Na 2 O.2SiO 2 glass was believed to follow, rather than precede, crystallization. Explanations of these phenomena are proposed.