The specific heat of a material is simply the measure of the amount of energy required to raise the temperature of a unit mass of the material by one degree. The specific heat of a material depends on the structure, pressure, and temperature of the material. Hence, measurement of specific heat can indicate structural changes and transitions in the material.Previous work at the State University of New York at Buffalo, shored anomalies in the specific heats of Glassy Carbon samples which had been exposed to neutron irradiation. Neutron irradiation of the carbon introduced defects in the material and the specific heat was dependent on the time of sample irradiation. The specific heat plotted as a function of temperature showed peaks at temperatures below 2.0°K. This indicates some kind of transition in the material. Also the specific heat values, which were measured up to 4.5°K, were much lower than the specific heat of the original nonirradiated material. Measurements indicated that the two kinds of samples had the same specific heat at room temperature. This kind of change in the specific heat of carbon has not been explained.The purpose of this project was to investigate the specific heats of these samples above 4.50K to determine where and how the anomalies in the specific heat disappeared at higher temperatures. The specific heats were measured by cooling the sample with liquid helium. This enabled the sample to obtain temperatures of 2.5°K and up. The specific heat was measured by electrically heating the thermally isolated sample and measuring the change in its temperature with a germanium resistance thermometer.
| Identifer | oai:union.ndltd.org:BSU/oai:cardinalscholar.bsu.edu:handle/181400 |
| Date | January 1976 |
| Creators | Myers, Bruce A. |
| Contributors | Mrozowski, Stanislaw |
| Source Sets | Ball State University |
| Detected Language | English |
| Format | iv, 60 leaves : ill. ; 28 cm. |
| Source | Virtual Press |
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