서지주요정보
Cubic 지르코니아계에서 화학적 불안정에 의한 계면이동, 재결정 및 고상-액상 계면 불안정 = Chemically induced migration and corrugation of and recrystallization at interfaces of cubic $ZrO_2$ system
서명 / 저자 Cubic 지르코니아계에서 화학적 불안정에 의한 계면이동, 재결정 및 고상-액상 계면 불안정 = Chemically induced migration and corrugation of and recrystallization at interfaces of cubic $ZrO_2$ system / 정준환.
저자명 정준환 ; Jeong, Jun-Whan
발행사항 [대전 : 한국과학기술원, 1990
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소장정보

등록번호

8001515

소장위치/청구기호

학술문화관(문화관) 보존서고

DMS 9024

휴대폰 전송

도서상태

이용가능

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반납예정일

초록정보

When sintered cubic $ZrO_2$-10mol%$Y_2O_3$ specimens are heat-treated at 1500 ℃ with MgO or $Y_2O_3$ solute, the boundaries between grains migrate, leaving behind them new solid solutions enriched with the solute oxides. With increasing MgO concentrations, there is an increasing tendency for different segments of the same boundary to move in opposite directions and develop faceted shapes. At high $Y_2O_3$ concentrations, recrystallization occurs at grain interfaces and its growth morphology varies with the solute concentrations : recrystallized grains become fine and advancing interfaces are faceted. Most of these phenomena can be successfully explained by coherency strain energy model already proved as the driving froce for CIIM in metallic systems. On the other hand, when MgO and $Y_2O_3$ are added to the liquid phase sintered ($ZrO_2$-10mol%$Y_2O_3$)-CuO specimen, the interfaces between cubic $ZrO_2Y_2O_3$ grains and surrounding CuO-rich liquid become corrugated, and the boundaries between grains migrate. With increasing the ratio of $Y_2O_3$ to MgO, these tendencies decrease to 0, and again increase. When the instability at the solid-liquid interface and boundary migration don't occur, the coherency strain is nearly 0. This result show definitely that the dominant driving force for the instability and boundary migration in oxide systems is also coherency strain energy as in metallic systems.

서지기타정보

서지기타정보
청구기호 {DMS 9024
형태사항 [ii], 131 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Jun-Whan Jeong
지도교수의 한글표기 : 윤덕용
지도교수의 영문표기 : Duk-Nong Yoon
학위논문 학위논문(박사) - 한국과학기술원 : 재료공학과,
서지주기 Reference : p. 124-131
주제 Surfaces.
Recrystallization (Metallurgy)
Coherent states.
지르코늄 합금. --과학기술용어시소러스
재결정. --과학기술용어시소러스
계면. --과학기술용어시소러스
Zirconium oxide.
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