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pISSN : 1598-706X / eISSN : 2288-8381


(논문)연구논문

한국주조공학회지 (14권5호 419-428)

A Study on Fabrication of Intermetallic Compounds/Al Matrix Composites by Squeeze Casting

용탕단조법에 의한 금속간화합물/Al기지 복합재료 개발을 위한 기초연

Dap-Chun Choi, Kyung-Ku Lee, Yeon-O Lee

Chonnam National University

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℃ 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℃ melt temperature and 350℃ 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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