서지주요정보
Pyr C. 의 공정개발과 특성에 대한 연구 : 온도와 회전 속도의 영향 = Study on the process development and the characteristics of pyrolytic carbon : effect of temprature. RPM
서명 / 저자 Pyr C. 의 공정개발과 특성에 대한 연구 : 온도와 회전 속도의 영향 = Study on the process development and the characteristics of pyrolytic carbon : effect of temprature. RPM / 류우석.
발행사항 [서울 : 한국과학기술원, 1981].
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소장정보

등록번호

4001269

소장위치/청구기호

학술문화관(문화관) 보존서고

MMS 8109

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리뷰정보

초록정보

The pyrolytic carbon is a new family of carbonaceous materials with structure and properties that can be controlled over wide ranges. One of the purposes of this research is to develop the tumbling bed as a new system in which the pyrolytic carbon can be obtained. This system consists of a parallel reaction tube equiped so that the gas composition, gas flow rate, temperature and RPM can be controlled. A batch of silica particles and graphite substrate is introduced into reaction tube in order to mix the gas and to rub the surfaces of substrate by rotation of reaction tube. Another purpose of this research is to study the influences of process variables on the coating density, microstructure, crystallite size and deposition rate. The process variables employed is the deposition temperature in the range of 900 to 1230℃, RPM in the range of 10 to 60 and total gas flow rate in the range of 0.5 to 3.0 1/min. In the case of the 1050-1230℃, 10-60 RPM and 1.0-3.0 1/min, the pyrolytic carbon has the isotropic structure, which is composed of the small columns. As the temperature increases, the coating density and growth rate increases and the crystallite size is constant. As the RPM increases, the coating density increases, the crystallite size is constant and the growth rate shows the minimum point. As the total gas flow rate increases, the density and crystallite size is constant and the growth rate increases. Considering the variation of growth rates, it is believed that the rate controlling step is both pyrolysis of propane gas to high molecular weight polymer and diffusion through the gas film. From the studies of microstructure, it is thought that the pyrolytic carbon is deposited both by the homogenious nucleation in the gas phase and by the heterogenious nucleation on the surfaces of substrate.

서지기타정보

서지기타정보
청구기호 {MMS 8109
형태사항 v, 48 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Woo-Seog Ryu
지도교수의 한글표기 : 이재영
지도교수의 영문표기 : Jai-Young Lee
학위논문 학위논문(석사) - 한국과학기술원 : 재료공학과,
서지주기 참고문헌 : p. 43-45
주제 Rotational motion.
Pyrolysis.
Microstructure.
Diffusion.
회전. --과학기술용어시소러스
열 분해. --과학기술용어시소러스
미세 구조. --과학기술용어시소러스
공정 개발. --과학기술용어시소러스
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