Metastable Alloy Formation in the Immiscible Cu–Ru System by Ion Beam Manipulation

X. He; X. Y. Li; B. X. Liu

doi:10.1143/jpsj.72.3032

Abstract

In the equilibrium-immiscible Cu–Ru system, a metastable crystalline (MC) alloy of face-centered cubic (FCC) structure was formed in the appropriately designed Cu₂₅Ru₇₅ multilayered films upon room-temperature ion beam manipulation using 200 keV xenon ions. More interestingly, an amorphous alloy was obtained in the Cu₅₀Ru₅₀ multilayered films at low irradiation dose and it transformed into the FCC MC alloy upon further irradiation at high dose. We report, in this Letter, experimental observations of the metastable alloy formation and briefly discuss the role of interfacial free energy in the metastable alloy formation observed in the Cu–Ru system.

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