표제지
목차
I. 서론 7
1. 연구배경 7
2. 이론적 배경 9
1) 자기 연마법의 원리 10
2) 자기 연마법의 요소 13
II. 실험방법 14
1. 자성지립의 제조 14
2. X-Ray Diffraction (XRD) 시험 14
3. 미세구조 관찰 15
4. 경도 측정 15
III. 결과 및 고찰 16
1. 볼밀에 따른 분말의 형상 및 상변화 16
2. 자전연소반응에 따른 연마제 제조 20
3. 제조된 연마분말의 기계적 특성 28
IV. 결론 30
참고문헌 31
Abstract 32
Fig. 1-1. Schematic diagram of magnetic abrasive procedure. 12
Fig. 3-1. SEM microstructure of raw powders. 17
Fig. 3-2. XRD patterns of powders after ball milling with change of A:B ratio for 1 hour. a) 5:5 b) 6:4 c) 7:3 d) 8:2 e) 9:1 18
Fig. 3-3. SEM micrographs of powders fabricated by ball milling with a change of A:B ratio for 1hour. a) 5:5 b) 6:4 c) 7:3 d) 8:2 e) 9:1 19
Fig. 3-4. XRD patterns of Fe-Al₂O₃ magnetic abrasive fabricated by melting with a change of A:B ratio. a) 5:5 b) 6:4 c) 7:3 d) 8:2 e) 9:1 21
Fig. 3-5. Optical microstructure of Fe-Al₂O₃ magnetic abrasive fabricated by melting after ball milling with a change of A:B ratio. a) 5:5, b) 6:4, c) 7:3, d) 8:2, e) 9:1 22
Fig. 3-6. EDS Mapping of Fe-Al₂O₃ magnetic abrasive fabricated by melting after ball milling with a change of 8:2 ratio. 23
Fig. 3-7. Optical microstructure of Fe-Al₂O₃ magnetic abrasive fabricated after etching with a change of A:B ratio. a) 5:5 b) 6:4 c) 7:3 d) 8:2 e) 9:1 25
Fig. 3-8. SEM micrographs of Fe-Al₂O₃ magnetic abrasive fabricated by melting with a change of A:B ratio. a) 5:5 b) 6:4 c) 7:3 d) 8:2 e) 9:1 26
Fig. 3-9. EDS Mapping of Fe-Al₂O₃ magnetic abrasive fabricated by melting with a change of A:B ratio. a) 5:5 b) 6:4 c) 7:3 d) 8:2 e) 9:1 27
Fig. 3-10. Hardness of Fe-Al₂O₃ magnetic abrasive fabricated by melting with a change of A:B ratio. a) 5:5 b) 6:4 c) 7:3 d) 8:2 e) 9:1 29