Paper Title:
Improving Subcritical Crack Growth Resistance for Alumina Glass Dental Composite
  Abstract

Abstract. The improvement of subcritical crack growth (SCG) resistance for alumina glass dental composites was explored in this study. The addition of nitrogen to the glass phases in the composite was found to increase the SCG resistance, where the SCG exponent n increases from 22 for the oxide glass composites to 30 for the composites containing 0.5 mol% nitrogen in the glass phases. The improvement was tentatively attributed to the nitrogen addition, which makes the glass network stronger through forming the non-flexible Si-N bonds and thus inhibits the hydrolysis reactions under the SCG conditions. Analyses demonstrated that the increase of the n value from 22 to 30 offers the potential to greatly extend the lifetime and improve the long-term reliability for the alumina glass dental composites.

  Info
Periodical
Key Engineering Materials (Volumes 280-283)
Edited by
Wei Pan, Jianghong Gong, Chang-Chun Ge and Jing-Feng Li
Pages
1623-1628
DOI
10.4028/www.scientific.net/KEM.280-283.1623
Citation
Q. Zhu, G. de With, "Improving Subcritical Crack Growth Resistance for Alumina Glass Dental Composite", Key Engineering Materials, Vols. 280-283, pp. 1623-1628, 2005
Online since
February 2007
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Price
$32.00
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