Fe-Co-Zr-B-Si계 비정질 합금에 미치는 Ni의 영향
- Alternative Title
- Effect of Ni in Fe-Co-Zr-B-Si system amorphous alloy
- Abstract
- The aim of this research is to fabricate Fe based amorphous alloys with high glass forming ability and to study mechanical properties for the fabricated alloys. Base metal was Fe-Co-Zr-B-Si alloy. Small amounts of transition metal (Ni) systematically added to base metal. It was prepared by arc melting and suction casting. Amorphous alloys were produced using Cu-mold suction casting method. The phase were identified by XRD. Crystallization behaviors were studied by using DSC and DTA. Micro hardness was measured by using micro vickers hardness tester. Typical amorphous halo pattern showed in the produced 3ΦFe70-C07-Zr6.5-B13.5-Si3 amorphous alloy. In this amorphous alloy systems, the Tg, Tx, ∆Tx, and Trg was 916K, 1140K, 224K, 0.59. The hardness values were about Hv= 750 ~ 800. (500gf, 20sec.)
- Issued Date
- 2013
- Awarded Date
- 2013. 8
- Type
- Dissertation
- Publisher
- 부경대학교
- Affiliation
- 대학원
- Department
- 대학원 신소재시스템공학과
- Advisor
- 김성규
- Table Of Contents
- 목 차
abstract 1. 서론 ................................................................................................ 1
2. 이론적 배경 ................................................................................ 4
2-1 비정질 합금의 정의 ............................................................ 4
2-1-1 비정질 합금의 정의 .................................................... 4
2-1-2 비정질 합금의 특성 .................................................. 5
2-1-3 과냉각 액체 ................................................................ 6
2-2 비정질 합금의 발전과정 .................................................. 21
2-3 비정질 형성을 위한 경험법칙 ........................................ 25
2-4 비정질 합금의 기계적 성질 및 파괴 거동 ................. 31
3. 실험방벙 .................................................................................... 35
3-1 합금재조 .............................................................................. 35
3-1-1 합금설계 ........................................................................ 35
3-1-2 모합금 제조 .................................................................. 35
3-1-3 시편의 제조 .................................................................. 36
3-2 시편 분석 ............................................................................ 39
3-2-1 X-선 회절 분석 ........................................................... 39
3-2-2 열분석 ............................................................................ 39
4. 실험결과 및 고찰 .................................................................... 41
4-1 시편의 제조.............................................................................. 41
4-2 X-선 회절 분석 ...................................................................... 43
4-3 열분석 ...................................................................................... 51
5. 결론 ............................................................................................ 54
6. 참고문헌 .................................................................................... 56
- Degree
- Master
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