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High‐Strength Mica‐Containing Glass‐Ceramics
Author(s) -
Uno Tomoko,
Kasuga Toshihiro,
Nakajima Kiichi
Publication year - 1991
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.1151-2916.1991.tb04314.x
Subject(s) - mica , materials science , ceramic , composite material , scanning electron microscope , microstructure , barium , mineralogy , mechanical strength , glass ceramic , metallurgy , chemistry
Glass‐ceramics containing barium–mica in the system Ba 0.5 Mg 3 (Si 3 AIO 10 )F 2 –2MgO · 2Al 2 O 3 · 5SiO 2 –Ca 3 (PO 4 ) 2 are two to three times stronger than conventional mica‐containing glass‐ceramics. Moreover, the barium‐mica glass‐ceramics are easier to machine, as confirmed by a drilling test using conventional steel tools. Such mechanical properties are attributable to the microstructure of the barium–mica glass‐ceramics. Very fine, interlocking mica crystals are precipitated in the glass, and a crack‐deflection mechanism is observed by scanning electron microscopy.