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Surface characteristics of high-strength MgO–CaO–SiO2−P2O5 glass-ceramics

Published online by Cambridge University Press:  03 March 2011

Jiin-Jyh Shyu  and
Jenn-Ming Wu
Jiin-Jyh Shyu
Affiliation:
Department of Materials Engineering, Tatung Institute of Technology, Taipei, Taiwan, Republic of China
Jenn-Ming Wu
Affiliation:
Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu, Taiwan, Republic of China
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Abstract

Surface-related characteristics (growth of surface layer and crystal preferred orientation) and the resulting mechanical strength of apatite-containing glass-ceramics in the system MgO–CaO–SiO2−P2O5 were investigated. The variations of surface-layer thickness and crystal preferred orientation were explained by a criterion considering both the surface and bulk nucleation of apatite phase. Glass-ceramics with a fairly high strength of 250–410 MPa could be obtained by an appropriate two-step heat treatment. The high strength in the present study is closely related to the growth of the surface layer, which might result in surface compressive-stress.

Type
Articles
Information
Journal of Materials Research , Volume 9 , Issue 3 , March 1994 , pp. 717 - 722
Copyright
Copyright © Materials Research Society 1994

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References

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