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논문 기본 정보

자료유형
학위논문
저자정보

장광주 (부산대학교, 부산대학교 대학원)

지도교수
박용호
발행연도
2015
저작권
부산대학교 논문은 저작권에 의해 보호받습니다.

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이 논문의 연구 히스토리 (2)

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After Al-Si-SiC composite powders with intra-granular SiC particles were prepared by a gas atomization process, the composite powders were mixed with Al-Zn-Mg alloy powders as a function of weight percent. Those mixture powders were compacted with the pressure of 700 MPa and then sintered at the temperature of 565-585℃. T6 heat treatment was conducted to increase their mechanical properties by solid-solution precipitates. Each relative density according to the optimized sintering temperature of those powders were determined as 96.3% at 575℃ for Al-Si-SiC powders (composition A), 91.9% at 570℃ for Al-Zn-Mg powders with 75 wt.% of Al-Si-SiC powders (composition B), 96.7% at 570℃ for Al-Zn-Mg powders with 50wt.% of Al-Si-SiC powders (composition C), 98.5% at 570℃ for Al-Zn-Mg powders with 25 wt.% of Al-Si-SiC powders (composition D), 98.2% at 570℃ for Al-Zn-Mg powders with 10 wt.% of Al-Si-SiC powders (composition E), 97.9% at 575℃ for Al-Zn-Mg powders with 5 wt.% of Al-Si-SiC powders (composition F), 96% at 580℃ for Al-Zn-Mg powders (composition G), respectively. Each hardness, tensile strength, and wear resistance test of those sintered samples was conducted. As the content of Al-Si-SiC powders increased, both hardness and tensile strength were decreased. However, wear resistance was increased by the increase of Al-Si-SiC powders. From these results, it was confirmed that Al-Si-SiC/Al-Zn-Mg composite could be highly densified by the sintering process, and thus the composite could have high wear resistance and tensile strength when the content of Al-Si-SiC composite powders were optimized.

목차

1. 서론 1
2. 이론적 배경 4
2.1 기술적 배경 4
2.1.1 분말 재료 개요 5
2.1.2 알루미늄 복합/합금분말의 소결 부품화 기술배경 6
2.2 분말 재료 공정 9
2.2.1 바인더 9
2.2.2 혼합과 배합 10
2.2.3 다이성형 19
2.2.4 밀도구배 24
2.2.5 가압 31
2.3 소결 34
3. 실험방법 45
3.1 원료분말 45
3.2 혼합, 성형 및 소결공정 46
3.3 특성평가 49
3.3.1 수중밀도 측성 49
3.3.2 광학현미경 49
3.3.3 주사전자현미경 49
3.3.4 로크웰 경도기 49
3.3.5 상온인장 시험기 49
3.3.6 내마모 시험기 50
4. 결과 및 고찰 52
4.1 분말 특성 52
4.2 소결체 특성 평가 54
4.2.1 소결밀도 54
4.2.2 소결미세조직 56
4.2.3 경도 특성평가 58
4.2.4 인장 특성평가 60
4.2.5 내마모성 특성평가 62
5. 결론 64
참고문헌 66
Abstract 69

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