Influence of Modes of Electrospark Treatment on Formation of Solid Solutions in Alloys of Copper with Iron and Cobalt

Оттиски доступнû непосредственно от издателя Ôотокопирование разрешено только в соответствии с лицензией  2018 ÈМÔ (Èнститут металлофизики им. Г. В. Курдюмова НАН Óкраинû) Напечатано в Óкраине. 1185 1186 В. М. НАДÓТОВ, А. О. ПЕРЕКОС, Б. М. МОРДЮК, В. З. ВОЙНАШ та ін. котрі зумовлені відповідними змінами концентрації Cu у твердих розчинах із залізом і кобальтом та переходом розмірів частинок у порошинках через критичне значення (перехід феромагнетик-суперпарамагнетик). Ключові слова: високодисперсні порошки, ультразвукове розмелювання, магнетні властивості, рентґеноструктурна аналіза, магнетні міряння. The structure, phase composition, dispersion, and magnetic properties of coarse-grained powder mixture (CGPM) of copper with iron and cobalt after ultrasonic treatment and annealing at 600 and 800°С are studied by x-ray analysis and magnetic methods. As shown, ultrasonic treatment in a ball mill results to mutual dissolution of metals, to solid-solution formation, and to considerable grinding of structure. Following annealing at 600°С does not change phase composition nearly, but essentially influence on coherentscattering regions' sizes, and its growth in accordance with Lifshitz-Sl'ozov coalescence theory. Annealing at 800°С results to appearance of pure-metal lines and disappearance of solid-solution lines on x-ray diagram that indicates on oversaturated solid-solutions' decomposition. Annealing influences essentially on magnetic properties of CGPM fabricated by ultrasonic treatment that is due to both changes of copper concentration in solid solutions with iron and cobalt and the transition of particles' sizes in powders over critical value (ferromagnetic−superparamagnetic transition).

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Effect of Surface State of Electric-Spark Particles on Solid Solution Formation during Ultrasonic Ball Milling of Copper–Cobalt and Copper–Iron Ultrafine-Grained Powder Blends

Perеkоs¹,

Mordyuk²,

Bondar³

et al. 2020

Metallofiz. Noveishie Tekhnol.

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Influence of Modes of Electrospark Treatment on Formation of Solid Solutions in Alloys of Copper with Iron and Cobalt

Cited by 4 publications

References 1 publication

Influence of Ultrasonic Processing in a Ball Mill on Phase-Structural Characteristics of Superfine Powder Blends of Copper with Iron and Cobalt

Influence of Ultrasonic Processing in a Ball Mill on Phase-Structural Characteristics of Superfine Powder Blends of Copper with Iron and Cobalt

Investigation of Process of Layering of the Solid Solutions Formed by Ultrasonic Milling of Coarse-Grained Powder Blends of Copper with Cobalt and Copper with Iron, and Its Influence on Their Structure–Phase State and Magnetic Properties

Effect of Surface State of Electric-Spark Particles on Solid Solution Formation during Ultrasonic Ball Milling of Copper–Cobalt and Copper–Iron Ultrafine-Grained Powder Blends

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