서지주요정보
Vertical bridgman 결정성장시의 thermosolutal convection에 관한 실험적 연구 = Experimental study on thermosotal convection in vertical bridgman crystal growth
서명 / 저자 Vertical bridgman 결정성장시의 thermosolutal convection에 관한 실험적 연구 = Experimental study on thermosotal convection in vertical bridgman crystal growth / 이병준.
저자명 이병준 ; Lee, Byoung-Joon
발행사항 [대전 : 한국과학기술원, 1992].
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소장정보

등록번호

8002851

소장위치/청구기호

학술문화관(문화관) 보존서고

MMS 92012

SMS전송

도서상태

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초록정보

Thermosolutal convection and convective instability during unidirectional solidification of Al-Mg alloys in vertical Bridgman furnace were investigated. The furnace was modified to give the same growth rate of the solidification front as the furnace moving rate. The morphology of solidification interface was revealed by quenching method, and the result was in agreement with the constitutional supercooling criterion. The solute distribution in the solid was analyzed by EDX, SIMS and spectrometer and the temperature fluctuation in the melt ahead of solidification front was measured by DTA for Al-Mg and Pb-Sn alloys. There was no detectable temperature fluctuation and microsegregation. But the macrosegregation in the axial direction was confirmed and was in the range between the cases of no convection and complete convection. Consequently, the flow pattern of thermosolutal convection is estimated to be a very weak laminar flow. The macrosegregation in axial direction increased as velocity decreased in the planar solidification range which is consistent with the computational analysis about thermosolutal convection and convective instability.

서지기타정보

서지기타정보
청구기호 {MMS 92012
형태사항 [iii], 57 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Byoung-Joon Lee
지도교수의 한글표기 : 이진형
지도교수의 영문표기 : Zin-Hyoung Lee
학위논문 학위논문(석사) - 한국과학기술원 : 재료공학과,
서지주기 참고문헌 : p. 55-57
주제 Crystal growth.
Aluminum-magnesium alloys.
Heat --Convection.
결정 성장. --과학기술용어시소러스
알루미늄 합금. --과학기술용어시소러스
열대류. --과학기술용어시소러스
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