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- Al-20Si-5.5Fe-1.2Mg-0.5Mn 합금분말의 치밀화에 미치는 소결온도와 분위기의 영향
- 이재욱, 박상빈, 양상선, 김용진
- Effects of Sintering Temperature and Atmosphere on Densification of Hypereutectic Al-Si Alloy Powders
- Jae-Wook Lee, Sang-Bin Park, Sang-Sun Yang, Yong-Jin Kim
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Journal of Korean Powder Metallurgy Institute 2008;15(3):196-203
DOI: https://doi.org/10.4150/KPMI.2008.15.3.196
1한국기계연구원 부설 재료연구소 분말재료연구부
2한국기계연구원 부설 재료연구소 분말재료연구부
3한국기계연구원 부설 재료연구소 분말재료연구부
4한국기계연구원 부설 재료연구소 분말재료연구부
1Department of Powder Materials Research, Korea Institute of Materials Science
2Department of Powder Materials Research, Korea Institute of Materials Science
3Department of Powder Materials Research, Korea Institute of Materials Science
4Department of Powder Materials Research, Korea Institute of Materials Science
2한국기계연구원 부설 재료연구소 분말재료연구부
3한국기계연구원 부설 재료연구소 분말재료연구부
4한국기계연구원 부설 재료연구소 분말재료연구부
1Department of Powder Materials Research, Korea Institute of Materials Science
2Department of Powder Materials Research, Korea Institute of Materials Science
3Department of Powder Materials Research, Korea Institute of Materials Science
4Department of Powder Materials Research, Korea Institute of Materials Science
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Abstract
The densification behavior of Al-20Si-5.5Fe-1.2Mg-0.5Mn powders was investigated through micro-structure analysis of sintered specimens. The specimens sintered in vacuum or in high purity (99.999%) nitrogen showed porous near-surface microstructures. The densification of near-surface part was enhanced by means of ultra-high purity (99.9999%) nitrogen atmosphere. The relationship between slow densification and oxide surfaces of Al alloy powders was discussed. And the effects of Mg addition, nitrogen gas, and humidity on densification were discussed. In addition, the rapid growth of primary Si crystals above the critical temperature was reported.
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