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Temperature Dependence of Hertzian Indentation Fracture Surface Energy of ThO 2
Author(s) -
INOUE T.,
MATZKE Hj.
Publication year - 1981
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.1151-2916.1981.tb10302.x
Subject(s) - indentation , materials science , composite material , fracture (geology) , surface stress , surface energy , saturation (graph theory) , fracture mechanics , thermodynamics , physics , mathematics , combinatorics
The fracture surface energy, γ, of ThO 2 was measured between room temperature and 400°C using the Hertzian indentation technique with cold or preheated steel and alumina indentors. The value of γdecreased strongly with temperature with a suggested saturation at 350°C. This may indicate the change from an unrelaxed fracture surface to a relaxed surface at temperatures where oxygen becomes mobile. The result obtained at 400°C is γ=1.4 J m −2 .