zr-based 비정질 합금의 비정질 형성능에 미치는 합금원소의 영향
- Abstract
- In commercial amorphous alloys, expensive element, Zr, was
substituted to Sn which was cheaper one. Even thought the Sn was added up to 2.0%, resulting phase was not changed to crystalline form. It was confirmed by X-ray diffraction and ther
mal analyses.
In the X-ray profiles, there were no peaks for crystalline phases and typical halo pattern for amorphous phase was appeared at the diffraction angle of 30°∼45°. Thermal analyses also showed that the Sn modified alloys were corresponded to the amorphous standards where △T(=Tx-Tg) and Trg(Tg/Tm) affecting to the amorphous forming ability were more than 50K and 0.5 respectively. Hardnesses of the Sn modified were 549∼566Hv not related Sn additions.
- Issued Date
- 2015
- Awarded Date
- 2015. 8
- Type
- Dissertation
- Publisher
- 부경대학교 산업대학원
- Affiliation
- 신소재시스템공학과
- Department
- 산업대학원 신소재시스템공학과
- Advisor
- 김성규
- Table Of Contents
- 목 차
제 1 장 서론 ............................................................................................................1
제 2 장 이론적 배경..................................................................................................3
2.1 비정질 합금의 정의.......................................................................................3
2.1.1 비정질 합금의 정의................................................................................3
2.1.2 비정질 합금의 특성................................................................................4
2.1.3 과냉각 액체..............................................................................................5
2.2 비정질 합금의 발전과정.............................................................................18
2.3 비정질 형성능을 위한 경험 법칙............................................................22
제 3 장 실험방법
3.1 합금제조.........................................................................................................27
3.1.1 합금설계..................................................................................................27
3.1.2 모합금 제조............................................................................................27
3.1.3 급냉 응고법을 이용한 시험편 제조.................................................29
3.2 X선 회절 분석..............................................................................................31
3.3 열분석.............................................................................................................32
3.3.1 시차주사열량 분석................................................................................32
3.3.2 시차열분석..............................................................................................32
3.4 미소경도시험.................................................................................................33
제 4 장 실험결과......................................................................................................34
4.1 비정질 형성능...............................................................................................34
4.2 Zr-Cu-Ni-Al계 합금..................................................................................35
4.2.1 Zr57.5-xCu18Ni14.5Al10Tix..........................................................................35
4.3. Zr-Cu-Ni-Al-Ti계 합금...........................................................................41
4.3.1 Zr52.5Cu18Ni14.5Al10-xTi5Snx...................................................................41
4.3.2 Zr55Cu18Ni14.5Al10-xTi2.5Snx.........................................................................................................47
제 5 장 결론..............................................................................................................52
참고문헌
- Degree
- Master
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