Elastic modulus and bend strength of a nuclear graphite at high temperature
Elastic modulus and bend strength of a nuclear graphite at high temperature
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DOI：
10.1016/0008-6223(87)90141-2
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发表时间：
1987
期刊：
影响因子：
10.9
通讯作者：
T. Maruyama;M. Eto;T. Oku
中科院分区：
文献类型：
--
作者：
T. Maruyama;M. Eto;T. Oku
用超声脉冲回波法测量了核石墨在室温至1400℃温度范围内的弹性模量。在450℃以上，材料的弹性模量几乎没有变化，但随着温度的升高，弹性模量几乎呈线性增加。在1000℃和1400℃时分别增加了约10%和24%。四点弯曲试验也测量了室温到1200℃之间的温度变化，发现弯曲强度随温度的变化与弹性模量的变化是平行的。讨论了抗弯强度与弹性模数之间的关系以及水分对强度的影响机理。
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.