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Current issue   Ukr. J. Phys. 2017, Vol. 62, N 8, p. 685-691
https://doi.org/10.15407/ujpe62.08.0685    Paper

Nadutov V.M., Perekos A.Ye., Voinash V.Z., Zalutskiy V.P., Kabantsev T.G.

G.V. Kurdyumov Institute for Metal Physics, Nat. Acad. of Sci. of Ukraine
(36, Vernadskyi Ave., Kyiv 03142, Ukraine)

Thermal Stability of Solid Solutions Formed by Ultrasonic Milling of Cu–Co and Cu–Fe Powder Mixtures

Section: Solid Matter
Original Author's Text: Ukrainian/English

Abstract: The structure and magnetic properties of coarse-grained copper-cobalt and copper-iron powder mixtures produced by the ultrasonic milling and annealed at 600 or 800 C have been studied,
by using the X-ray difraction and magnetometry methods. The treatment of the mixtures in an
ultrasonic ball mill is shown to result in the mutual dissolution of metals and the solid solution
formation, as well as in a considerably fner mixture structure. The following annealing of
those powder mixtures at 600 C did not change their phase compositions, but substantially
afected the size of coherently scattering domains. In the both cases, the latter grew by almost
an order of magnitude in agreement with the Lifshitz–Slyosov–Wagner theory. The annealing of
the specimens at 800 C resulted in the absolute decomposition of supersaturated solid solutions
formed under the ultrasonic treatment

Key words: Cu–Co and Cu–Fe powder mixtures, ultrasonic milling, supersaturated solid
solution, structure, magnetic properties.

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