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Influence of Surface Structure on the Fracture Toughness of Tempered Glass
Author(s) -
Chao Chen,
Zongzhe Jin,
Jingyi Chang
Publication year - 1988
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1988.tb07519.x
Subject(s) - materials science , fracture toughness , composite material , tempering , toughened glass , indentation , fracture (geology) , toughness , surface layer , layer (electronics)
A nondestructive measurement of the surface stress and an indentation technique were used to determine the relationship between the fracture toughness and the surface compressive stress of a tempered glass plate. Ignoring the effect of surface compression, one can determine the fracture toughness concerned only with a change in the glass structure. It is found that the fracture toughness is lower for tempered glass than for annealed glass. It is indicated that the decrease is due to structural changes in the surface layer during the heat treatment in tempering; this is confirmed by infrared reflection spectroscopy.