Elastic modulus and bend strength of a nuclear graphite at high temperature |
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| Authors: | Tadashi Maruyama Motokuni Eto Tatsuo Oku |
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| Affiliation: | 1. Oak Ridge National Laboratory, Oak Ridge, TN 37830, USA;2. Nuclear Graphite Research Group, Department of Mechanical, Aerospace and Civil Engineering, The University of Manchester, M13 9PL, United Kingdom;3. Ludwig-Maximilians-Universität München (LMU Munich), Department of Chemistry and Center for NanoScience, Butenandtstrasse 5–13 (E), 81377 Munich, Germany;4. Canadian Nuclear Laboratories, Chalk River, ON K0J 1J0, Canada;5. Tritium Science & Technology Group, Department of Materials, The University of Manchester, M13 9PL, United Kingdom |
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| Abstract: | The elastic modulus of a nuclear graphite was measured in the range from room temperature to 1400°C by the ultrasonic pulse echo method. Little or no change in the elastic modulus was observed up to 450°C. Above 500°C, however, it increased almost linearly with increasing temperature. The fractional increase was about 10% at 1000°C and 24% at 1400°C. The four-point bend test was also measured at temperatures between room temperature and 1200°C. Changes in bend strength with temperature were found to parallel to those of the elastic modulus. The mechanism for the correlation between the bend strength and the elastic modulus, as well as the effect of moisture on the strength, was discussed. |
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| Keywords: | Elastic modulus bending strength high temperature |
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