Improvement of Mechanical Properties of Machinable Glass-Ceramics through Postmachining Heat Treatments |
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| Authors: | Hidero Unuma Koh Miura Kohei Kodaira |
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| Affiliation: | Government Industrial Development Laboratory, Hokkaido, 2–17 Tsukisamu-Higashi, Sapporo 062, Japan;Faculty of Engineering, Hokkaido University, Sapporo 060, Japan |
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| Abstract: | 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. |
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