Abstract
Multilayered samples of the binary systems AuW, AgW and CuW of different overall compositions were irradiated at 77 K with 400 keV Kr + ions at doses up to 5 × 10 16 ions cm −2. In thermal equilibrium these systems have a vanishingly small solid solubility of the components corresponding to a large positive value of the heat of formation. The AgW and CuW systems are known to be immiscible even in the liquid state. Analysis of lattice parameters from our experiments indicates that metastable solid solutions have formed during ion irradiation. This shows that ion beam mixing is a suitable method for producing metastable alloys even in systems with large positive heats of formation.
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