Journal of Korea Foundry Society (한국주조공학회지)

Korea Foundry Society (한국주조공학회)
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A Study on Fabrication of Intermetallic Compounds/Al Matrix Composites by Squeeze Casting

용탕단조법에 의한 금속간화합물/Al기지 복합재료 개발을 위한 기초연구

  • Choi, Dap-Chun (Dept. of Metallurgical Eng., Chonnam National University) ;
  • Lee, Kyung-Ku (Dept. of Metallurgical Eng., Chonnam National University) ;
  • Lee, Yeon-O (Dept. of Metallurgical Eng., Chonnam National University)
  • Published : 1994.10.31
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Abstract

The microvickers hardness and microstructure of Fe/Al composite fabricated by squeeze casting method were investigated. Pure Al and A356 Alloy were chosen for the matrix composition and Fe preform was fabricated with sintered Fe powder at $1000^{\circ}C$ for 30min. under hydrogen atmosphere. Experimental variables were included preheating temperature, melt temperature and applied pressure. Analysing the experimental result concerning microstructure of fabricated composites, Fe/A356 composite showed improved microstructure at $600^{\circ}C$ melt temperature and $350^{\circ}C$ preform preheating temperature in Fe distribution and Infiltrated distance. The results of EDX and XRD showed that the interfacial zones of Fe/Al composite were composed of non-equilibrium intermetallic layers[$(Al_5Fe_2)_x$, $Al_{13}Fe_4m\;Fe_3Al$, FeAl]. The microvickers hardness of Fe/Al composite showed higher value than Fe/A356 composite in interface.

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