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Internal Friction in Lithium Aluminosilicate Glass‐Ceramics
Author(s) -
Versteeg Vera A.,
Kohlstedt David L.
Publication year - 1994
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.1151-2916.1994.tb05389.x
Subject(s) - materials science , ceramic , torsion pendulum clock , aluminosilicate , composite material , attenuation , mineralogy , grain boundary , microstructure , optics , chemistry , biochemistry , physics , quantum mechanics , catalysis
This paper describes the results of an investigation of the anelastic behavior of two glass‐ceramic materials with similar compositions, one nucleated with TiO 2 and the other with ZrO 2 . The influence of the grain size, residual glass fraction, and composition was examined. A low‐frequency torsion pendulum was constructed for this purpose. The as‐received TiO 2 ‐nucleated. Corning Code 9608 ceramic exhibits an attenuation peak at about 750°C; when heat‐treated at 1200°C for 167 h, the attenuation peaks at approximately 850°C. The ZrO nucleated glass‐ceramic showed no such peak. Our results indicate that this anelastic behavior is due to grain boundary sliding, but the rates and magnitude of sliding are strongly dependent on boundary chemistry.