Indentation Thermal Shock Test for Ceramics |
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Authors: | Tomas Andersson David J. Rowcliffe |
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Affiliation: | Department of Materials Science and Engineering, Royal Institute of Technology, 100 44 Stockholm, Sweden |
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Abstract: | This paper presents an indentation-quench method to determine the resistance of ceramics to thermal cycling. The method defines a critical quench temperature difference, Δ T c, based on a criterion which includes a minimum amount of crack growth and a minimum fraction of growing cracks. The method is applied to three different materials, which are ranked according to the individual values of Δ T c. The variation of ΔTc with different indentation loads and indentation positions is investigated. This technique uses a small number of specimens, avoids subsequent mechanical testing, and provides information about the ΔT C of the materials. The effect of repeated cycling on crack extension is also discussed. |
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