서지주요정보
알루미나-아노싸이트 계의 다결정 Matrix에서 sapphire 단결정의 성장 = Growth of sapphire single crystals in a matrix of fine alumina grains and anorthite liquid
서명 / 저자 알루미나-아노싸이트 계의 다결정 Matrix에서 sapphire 단결정의 성장 = Growth of sapphire single crystals in a matrix of fine alumina grains and anorthite liquid / 백주희.
저자명 백주희 ; Back, Ju-Hee
발행사항 [대전 : 한국과학기술원, 2003].
Online Access 원문보기 원문인쇄

소장정보

등록번호

8014005

소장위치/청구기호

학술문화관(문화관) 보존서고

MMS 03019

SMS전송

도서상태

이용가능

대출가능

반납예정일

초록정보

In alumina-anorthite liquid systems, grains have polyhedral shape with atomically flat interfaces. Because of their flat interfaces, it is predicted that they grows by nucleating steps in their interfaces. When grain growth occurs by 2-D nucleation and defect-associated process, the relationship between the growth rate v and the driving force F can be non-linear, and it can lead the grain growth behavior to be abnormal grain growth. In order to determine the v(F) relationship, we observed the migration of the basal planes of a sapphire single crystal in alumina-15wt% anorthite, and determined the driving force for the migration of the basal planes by measuring sizes of matrix grains. In an early stage of the coarsening of grains, the driving force was high, and the migration rate of basal planes varied linearly as the driving force for the growth. As the driving force decreased, however, the relationship between the growth rate and the driving force of a single crystal became non-linear, and the migration of the basal planes depended on their dislocation densities. This kind of behavior proves that the basal planes of a sapphire single crystal migrate by step growth mechanism and abnormal grain growth occurs owing to step growth mechanism.

서지기타정보

서지기타정보
청구기호 {MMS 03019
형태사항 ii, 61 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Ju-Hee Back
지도교수의 한글표기 : 윤덕용
지도교수의 영문표기 : Duk-Yong Yoon
학위논문 학위논문(석사) - 한국과학기술원 : 재료공학과,
서지주기 참고문헌 : p. 56-58
주제 입자 성장
알루미나
아노싸이트
단결정
grain growth
alumina
anorthite
single crystal
QR CODE qr code