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Effects of indenter geometry on indentation-induced densification of soda-lime glass

Published online by Cambridge University Press:  31 January 2011

Satoshi Yoshida ,
Hiroshi Sawasato ,
Toru Sugawara ,
Yoshinari Miura  and
Jun Matsuoka
Satoshi Yoshida*
Affiliation:
Center for Glass Science and Technology, The University of Shiga Prefecture, 2500, Hassaka, Hikone, 522-8533 Shiga, Japan
Hiroshi Sawasato
Affiliation:
Center for Glass Science and Technology, The University of Shiga Prefecture, 2500, Hassaka, Hikone, 522-8533 Shiga, Japan
Toru Sugawara
Affiliation:
Center for Glass Science and Technology, The University of Shiga Prefecture, 2500, Hassaka, Hikone, 522-8533 Shiga, Japan
Yoshinari Miura
Affiliation:
Center for Glass Science and Technology, The University of Shiga Prefecture, 2500, Hassaka, Hikone, 522-8533 Shiga, Japan
Jun Matsuoka
Affiliation:
Center for Glass Science and Technology, The University of Shiga Prefecture, 2500, Hassaka, Hikone, 522-8533 Shiga, Japan
*
a)Address all correspondence to this author. e-mail: yoshida@mat.usp.ac.jp
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Abstract

Hardness of glass is known to be related to the resistance to permanent deformation. However, the mechanism of permanent deformation of glass under a sharp diamond indenter is not clear yet. One of the deformation modes of oxide glass at room temperature is permanent densification. In this study, the indentation-induced densification of soda-lime glass under diamond indenters was evaluated from the volume recovery of indentation imprint by thermal annealing. The volume change of the indentation imprint by annealing corresponds to the densified volume under the indenter. Using some kinds of diamond indenters, which have different inclined face angles, the ratios of densified volume to the total “lost” volume under the indenters were determined. With an increase in the inclined face angle, the densification contribution decreased and the shear-flow contribution increased. This indenter-shape dependence of densification in glass is discussed in terms of the stress dependence of the deformation mechanisms in glass.

Keywords

AmorphousAnnealingDensification
Type
Articles
Information
Journal of Materials Research , Volume 25 , Issue 11 , November 2010 , pp. 2203 - 2211
Copyright
Copyright © Materials Research Society 2010

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References

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