비정질 (Fe1-x Co x) 80 B20 합금의 결정화 과정에 대한 속도론적 연구 = Crystallization Kinetics of Amorphous (Fe1-x Cox) 80 B 20 Alloys

다국어 초록 (Multilingual Abstract)

The thermal stability for the amorphous (Fe_(l-x)Co_x)_(80)B_(20) alloys has been studied systematically through DTA, X-ray diffraction pattern and the electrical resistance change response to temperature and time variations. The results obtained are as follows;
1) The crystallization temperature of amorphous (Fe_(l-x)Co_x)_(80)B_(20) alloy is independent of the concentration of Co and it is about 710˚K.
2) The crystallization process of amorphous (Fe_(l-x)Co_x)_(80)B_(20) alloy occurs in two steps;
In the composition range of 0.1≤x≤0.5, amorphous (Fe_(l-x)Co_x)_(80)B_(20)→α phase (Fe, Co; bcc)＋Fe₃B(bct) →α phase (Fe, Co; bcc)＋Fe₂B(fct)＋Co₂B(fct), and in the composition of x = 0.6 amorphous (Fe_(l-x)Co_x)_(80)B_(20)→α phase (Fe, Co; bcc) ＋Fe₃B(bct)＋Co₃B(fct) →αphase (Fe, Co; bcc)＋Fe₂B(fct)＋Co₂B(fct), and in the composition of x = 0.7 amorphous (Fe_(l-x)Co_x)_(80)B_(20)→αphase (Fe, Co; bcc) ＋Co₃B(fco)→αphase (Fe, Co; bcc)＋Fe₂B(fct)＋Co₂B(fct)
3) The crystallization of amorphous (Fe_(l-x)Co_x)_(80)B_(20) is the diffusion-controlled nucleation and growth process, and the crystallization activation energy of amorphous (Fe_(l-x)Co_x)_(80)B_(20) alloy is independent of the composition of Co and it is about 70㎉/mole.

목차 (Table of Contents)

• 1. 緖論
• 2. 實驗方法
• 2.1 非晶質 試料
• 2.2 示差熱分析
• 2.3 電氣抵抗測定 및 構造解釋
• 3. 結果 및 考察
• 3.1 結晶化溫度 및 構造解釋
• 3.2 結晶化 過程
• 4. 結論