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Thermo-electrical properties of randomly oriented carbon/carbon composite
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  • Thermo-electrical properties of randomly oriented carbon/carbon composite
저자명
Thakur Sudesh Kumar Raunija,N. Supriya
간행물명
Carbon LettersKCI
권/호정보
2017년|22권 (통권68호)|pp.25-35 (11 pages)
발행정보
한국탄소학회|한국
파일정보
정기간행물|ENG|
PDF텍스트(2.21MB)
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서지반출

영문초록

The aim of the work was to investigate the thermo-electrical properties of low cost and rapidly produced randomly oriented carbon/carbon (C/C) composite. The composite body was fabricated by combining the high-pressure hot-pressing (HP) method with the lowpressure impregnation thermosetting carbonization (ITC) method. After the ITC method step selected samples were graphitized at 3000°C. Detailed characterization of the samples’ physical properties and thermal properties, including thermal diffusivity, thermal conductivity, specific heat and coefficient of thermal expansion, was carried out. Additionally, direct current (DC) electrical conductivity in both the in-plane and through-plane directions was evaluated. The results indicated that after graphitization the specimens had excellent carbon purity (99.9 %) as compared to that after carbonization (98.1). The results further showed an increasing trend in thermal conductivity with temperature for the carbonized samples and a decreasing trend in thermal conductivity with temperature for graphitized samples. The influence of the thickness of the test specimen on the thermal conductivity was found to be negligible. Further, all of the specimens after graphitization displayed an enormous increase in electrical conductivity (from 190 to 565 and 595 to 1180 S/cm in the through-plane and in-plane directions, respectively).

목차

1. Introduction
2. Experimental
3. Results and Discussion
4. Conclusions
References

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