알루미나 단결정에서 화학재결정(CIR) 입자 성장 = The Growth of a Chemically Induced Recrystallization (CIR) Grain in an Alumina Single Crystal

다국어 초록 (Multilingual Abstract)

The growth characteristics and grain refinement of a single grain formed by the dissolution of an Fe_(2)O_(3) into an alumina single crystal matrix have been investigated. In order to observe the growth characteristics of the single grain, the first new grains nucleated were successively heat-treated at an interval of 30 min for 2.5 h at 1500℃. At the stage of growth after nucleation, the first new grains nucleated grew by the mechanism of chemically induced grain boundary migration(CIGM) and grain refinement within the first new grains nucleated occurred by a repeated nucleation. The growth of the chemically induced recrystallization grains have showed the characteristics as follows: (1) faceted growth shape (2) subgrain formation and its growth in the interior of the first new grain nucleated, and (3) grain refinements by the growth of such subgrains. From the many slip lines observed during the growth of the subgrains, it is believed that the growth mechanism of the subgrain is a subgrain boundary dissolution by the glide and climb of individual dislocations at the subgrain boundary.

목차 (Table of Contents)

• ABSTRACT
• I. 서론
• II. 실험 방법
• III. 결과 및 고찰
• IV. 결론
• 참고문헌