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Effect of phase transformation on the junction between zirconia/alumina ceramics and commercial coating-glass

Jiuyu Song 1,2Bin Zhang 1,2Jihua Chen 1Jinyun Gao 3Guanjun Qiao 3

1. Fourth military medical university, college of stomatology, department of prosthodontics, Changle Road 17, Xi'an 710032, China
2. General hospital of shenyang military region, Wenhua Road 83, Shenyang 110015, China
3. Xi'an Jiaotong University, State key laboratory for mechanical behavior of metal materials, Xianning Road 32, Xi'an 710012, China

Abstract

The object of this research was to find the influence of zirconia's phase transformation on the junction between zirconia/alumina ceramics and commercial coating-glass. Effect of phase transformation was observed through coefficient curves of thermal expansion in four kinds of zirconia/alumina composites: pure zirconia, zirconia toughened alumina, alumina toughened zirconia, pure alumina. Energy spectrum analysis, optical and electron scanning microscope were observed on the junction of zirconia/alumina ceramics with coating glass. Furthermore, pre-sintering process was executed to find the heat softening point of the coating-glass. Through experiments, we find phase transformation was only observed in the pure zirconia group. There is no obvious effect of phase transformation in the other three groups. Therefore, we can conclude that adding alumina into pure zirconia may restrict the transformation of zirconia particles and result in the decrease even the disappearance of transformation phenomenon. Therefore, VITA alpha coating glass is a kind of adoptable bio-glass matching with zirconia and zirconia composites. In the mean time, thermal expansion coefficient of two matching materials should also be considered.

 

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Related papers

Presentation: Poster at E-MRS Fall Meeting 2006, Symposium J, by Bin Zhang
See On-line Journal of E-MRS Fall Meeting 2006

Submitted: 2006-03-15 06:39
Revised:   2009-06-07 00:44