Improving Subcritical Crack Growth Resistance for Alumina Glass Dental Composite

Abstract:

Article Preview

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 and 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

Authors:

Export:

Price:

$35.00

In order to see related information, you need to Login.

In order to see related information, you need to Login.