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Microstructure of Mica‐Based Nanocomposite Glass‐Ceramics
Author(s) -
Uno Tomoko,
Kasuga Toshihiro,
Nakayama Shin,
Ikushima Akira J.
Publication year - 1993
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.1151-2916.1993.tb03821.x
Subject(s) - materials science , microstructure , mica , composite material , cubic zirconia , machinability , crystallization , transmission electron microscopy , ceramic , nanocomposite , nanometre , micrometer , glass ceramic , texture (cosmology) , mineralogy , chemical engineering , metallurgy , nanotechnology , optics , machining , engineering , image (mathematics) , artificial intelligence , computer science , chemistry , physics
A high‐strength machinable glass‐ceramic was prepared by controlling the crystallization of ZrO 2 ‐containing Ca 0.43 K 0.14 Mg 3 (Si 3 AlO 10 )F 2 glass. A unique microstructure of the glass‐ceramic was observed, using transmission electron microscopy (TEM): zirconia particles of nanometer size, 20–50 nm, were embedded in calcium mica crystal. After zirconia particles grew in nanometer size, the mica crystals were precipitated to embed the particles. The particles were identified as transformable tetragonal zirconia crystals. This texture leads to high strength (500 MPa in bending) and good machinability.