Change in Vickers hardness at the glass transition region for fragile and strong glasses

T. Watanabe, Yasuhiko Benino, T. Komatsu

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

The temperature dependence of Vickers hardness between room temperature and around the glass transition temperature Tg in a vacuum for some glasses with different fragile characters was measured. The hardness at T/Tggg=0.9-1.0 for fragile Bi2O3- and TeO2-based glasses, but 50CuOx·50P2O5 and soda-lime silicate glasses with strong viscosity characteristics still have relatively large Vickers hardness even at Tg and the hardness drops to almost zero around T/Tg=1.05-1.1. It is suggested that for fragile glasses the β-relaxation has an important effect on the Vickers hardness change near the glass transition region, but for strong glasses it is the α-relaxation that governs the hardness near Tg.

Original languageEnglish
Pages (from-to)141-145
Number of pages5
JournalJournal of Non-Crystalline Solids
Volume286
Issue number3
DOIs
Publication statusPublished - Jul 2001
Externally publishedYes

Fingerprint

Vickers hardness
Glass transition
Glass
glass
Hardness
hardness
Silicates
Lime
calcium oxides
glass transition temperature
Vacuum
Viscosity
silicates
Temperature
viscosity
vacuum
temperature dependence
room temperature

ASJC Scopus subject areas

  • Ceramics and Composites
  • Electronic, Optical and Magnetic Materials

Cite this

Change in Vickers hardness at the glass transition region for fragile and strong glasses. / Watanabe, T.; Benino, Yasuhiko; Komatsu, T.

In: Journal of Non-Crystalline Solids, Vol. 286, No. 3, 07.2001, p. 141-145.

Research output: Contribution to journalArticle

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