Microstructure of a rapidly solidified 65Al-20Cu-15Fe (at. %) alloy

Ping Liu, An Pang Tsai, Akihisa Inoue, L. Arnberg

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    2 Citations (Scopus)


    The microstructure of rapidly solidified 65Al-20Cu-15Fe (at. %) powders was investigated by analytical transmission electron microscopy. It was found that segregation in the powder particle occurred during solidification. The major phase present in the powder particles was the icosahedral quasicrystalline l-phase, which was determined to have space group {Mathematical expression}. Two other crystalline phases, β-AlCu3 and θ-Al13Fe4, coexisted with the l-phase. The l-phase was revealed by convergent beam electron diffraction to have three-dimensional quasiperiodicity (τ = 1.618) which is different from quasicrystals in the other systems. The compositions of the three phases have been analysed by energy dispersive X-ray analysis. The l-phase in this system could be approximately described as Al5CuFe. The composition of the θ-Al13Fe4 was very close to the equilibrium condition while β-AlCu3 was far from stoichiometry. An orientation relationship between β-AlCu3 and θ-Al13Fe4 was found as follows: [110]β∥[010]θ [111]β∥[001]θ

    Original languageEnglish
    Pages (from-to)963-969
    Number of pages7
    JournalJournal of Materials Science
    Issue number4
    Publication statusPublished - 1991 Jan 1

    ASJC Scopus subject areas

    • Materials Science(all)
    • Mechanics of Materials
    • Mechanical Engineering


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