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Improvement of Mechanical Properties of Machinable Glass‐Ceramics through Postmachining Heat Treatments
Author(s) -
Unuma Hidero,
Miura Koh,
Kodaira Kohei
Publication year - 1992
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.1151-2916.1992.tb04501.x
Subject(s) - mica , machinability , materials science , composite material , crystallization , ceramic , cordierite , glass ceramic , thermal expansion , indentation hardness , microstructure , metallurgy , chemical engineering , machining , engineering
A mica‐based machinable glass‐ceramic has been converted to a glass‐ceramic containing cordiertie and body‐centered cubic chondrodite through heat treatment at temperatures higher than that used for the crystallization of mica. The machinability is lost, microhardness increases, and the thermal expansion coefficient decreases with the change of the crystalline phase from mica to cordierite and chondrodite.