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Grain size of MgO and polymorphic phases of ZrO2 in zirconia-toughened MgO

Published online by Cambridge University Press:  03 March 2011

Yasuro Ikuma ,
Toshio Sugiyama  and
Junko Okano
Yasuro Ikuma
Affiliation:
(Kanagawa Institute of Technology, Shimoogino, Atsugi, Kanagawa 243-02, Japan
Toshio Sugiyama
Affiliation:
(Kanagawa Institute of Technology, Shimoogino, Atsugi, Kanagawa 243-02, Japan
Junko Okano
Affiliation:
(Kanagawa Institute of Technology, Shimoogino, Atsugi, Kanagawa 243-02, Japan
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Abstract

Zirconia-toughened MgO was manufactured and examined by scanning and transmission electron microscopes. It was found that ZrO2 particles that are present on the MgO grain boundary limit the grain growth of MgO. The cooling rate has an effect on the ZrO2 phase in zirconia-toughened MgO fired in a cubic ZrO2–MgO field, but it does not have an effect on the ZrO2 phase in specimens fired in a tetragonal ZrO2–MgO field. Tetragonal ZrO2 was retained at room temperature in zirconia-toughened MgO.

Type
Rapid Communications
Information
Journal of Materials Research , Volume 8 , Issue 11 , November 1993 , pp. 2757 - 2760
Copyright
Copyright © Materials Research Society 1993

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References

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