Interaction of iron-nickel alloys with liquid aluminium. Part II. Formation of intermetallics

• Published in: Journal of materials science Vol. 35; no. 7; pp. 1729 - 1736
• Main Author: DYBKOV, V. I
• Format: Journal Article
• Language: English
• Published: Heidelberg Springer 01.01.2000; Springer Nature B.V
• Subjects: Alloys; Aluminum; Applied sciences; Electron probe microanalysis; Electron probes; Exact sciences and technology; Ferrous alloys; Intermetallic compounds; Iron constituents; Materials science; Metallurgical constituents; Metals. Metallurgy; Ores; Phase composition; Production of metals; Thickness; Interfacial layer; Liquid metal; Electron microprobe analysis; Phase composition; Intermetallic compound; Distribution; Aluminium; Interface reaction; Hardness; Iron alloy; Molten metal corrosion; Nickel alloy
• ISSN: 0022-2461; 1573-4803
• DOI: 10.1023/A:1004724401682

The phase composition of the one-phase intermetallic layer(s) and two-phase reaction zone(s) at the interface between a solid iron-nickel alloy, containing 90, 75, 50, 25, 20, 15 and 10 mass% Fe, and the aluminium melt, saturated with alloy constituents at 700°C, was studied by electron probe microanalysis. The formation of binary (FeAl3, Fe2Al7, NiAl3 and surprisingly NiAl2 rather than Ni2Al3) and ternary (FeNiAl9) intermetallic compounds was observed. All the binaries were found to dissolve considerable amounts of a third element (Ni or Fe) and to have a noticeable range of homogeneity. Dissolution of the Fe-Ni alloy base into pure liquid aluminium resulted in a large decrease (three to five times) of the layer thickness compared to the case of the saturated melt.