Кафедра "Фізика металів і напівпровідників"

Постійне посилання колекціїhttps://repository.kpi.kharkov.ua/handle/KhPI-Press/4703

Офіційний сайт кафедри http://web.kpi.kharkov.ua/fmp

Від 2002 року кафедра має назву "Фізика металів і напівпровідників", попередня назва – кафедра металофізики.

Кафедра металофізики організована в 1930 році у складі фізико-механічного факультету ХММІ. Деканом факультету був у ті роки видатний вчений-фізик, академік Іван Васильович Обреїмов.

Кафедра входить до складу Навчально-наукового інституту комп'ютерного моделювання, прикладної фізики та математики Національного технічного університету "Харківський політехнічний інститут". За час існування кафедрою підготовлено близько 3000 інженерів, у тому числі і для зарубіжних країн.

У складі науково-педагогічного колективу кафедри працюють: 3 доктора та 2 кандидата фізико-математичних наук; 3 співробітника мають звання професора.

Переглянути

Фільтри

2018 - 20193

Налаштування

Автор: search.filters.author.Mamalis, Athanasios G.Містить файли: Так

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Зараз показуємо 1 - 3 з 3
  • Ескіз
    Документ
    Synthesis Features of Iron Oxide Nanopowders with High Magnetic and Sorption Properties
    (Trans Tech Publications, 2018) Lavrynenko, Sergiy; Mamalis, Athanasios G.; Sofronov, Dmitry; Odnovolova, Alexandra; Starikov, Vadym
    The magnetic particles of iron oxides are promising materials for the purification of water from ions of heavy metals and radionuclides. Their advantage compared to other sorbents is the ability to extract by applied magnetic field, which greatly simplifies the task of extraction, separation and processing in cleaning technologies. The aim of this work is investigation of temperature and concentration of iron in the solution effect on the phase composition, nanoparticle size and their magnetization. Phase magnetite in the sample increases with increasing temperature and the magnetization decreases slightly with increasing the initial concentration of iron in solution. We found that regardless of the conditions of deposition formed spherical particles whose average size ranges from 7 to 15 nm. The sorptive capacity of the particles is virtually independent of the phase composition and for cobalt is about 18 mg/g. For sorption-based material magnetic particles Fe3O4 recommended to carry out the deposition process at a temperature not lower than 80°C. The concentration of iron in solution must be within 0,15–0,3M. The particles obtained contain in their composition at least 90 wt.% of magnetite phase and are characterized by a magnetization in the range of 65–70 A·m2/kg. Also in the paper is comparing efficiency of extraction and sorptioncapacity for cobalt particles by different phase of magnetite and hematite.
  • Ескіз
    Документ
    Nanostructured ZrO₂ ceramic PVD coatings on Nd-Fe-B permanent magnets
    (Collegium Basilea, 2019) Taran, Anton; Garkusha, Igor; Taran, Valerij; Timoshenko, Alexander; Misiruk, Ivan; Starikov, Vadym; Baturin, Alexey; Skoblo, Tamara; Romaniuk, Svetlana; Mamalis, Athanasios G.
    The results of vacuum-arc deposition (PVD) of thin ZrO2 coatings to protect the surface of Nd-Fe-B permanent magnets used as repelling devices in orthodontics are presented. Magnetic devices are offered as an optimum and biologically safe forcegenerating system for orthodontic tooth movement. The structure, phase composition and mechanical properties of zirconium oxide films have been investigated by means of SEM, XRD, EDX, XRF and nanoindentation methods. The coatings are formed of polycrystalline ZrO2 films of monoclinic modification with average grain size 25 nm. The influence of the ZrO2 coating in terms of its barrier properties for corrosion in quasiphysiological 0.9% NaCl solution has been studied. Electrochemical measurements indicated good barrier properties of the coating on specimens in the physiological solution environment.
  • Ескіз
    Документ
    Structure and properties of nanostructured ZrN coatings obtained by vacuum-arc evaporation using RF discharge
    (Collegium Basilea, 2018) Taran, Anton; Garkusha, Igor; Taran, Valerij; Muratov, Renat; Starikov, Vadym; Baturin, Alexey; Skoblo, Tamara; Romaniuk, Svetlana; Mamalis, Athanasios G.
    Nanostructured films of zirconium nitride have been synthesized using an ion plasma vacuum-arc deposition technique in combination with a high-frequency (RF) discharge on AISI 430 stainless steel at 150 °C. Structural examination using X-ray fluorescence (XRF), X-ray diffraction (XRD), scanning electron microscopy (SEM) with microanalysis (EDX), transmission electron microscopy (TEM), and nanoidentation was undertaken to reveal phase and chemical composition, surface morphology, microstructure and nanohardness of the coatings. The developed technology provided low-temperature film synthesis, minimized discharge breakdown decreasing formation of macroparticles (MPs) and allowed to deposit ZrN coatings with hardness variation 26.6–31.5 GPa and enhanced corrosion resistance characteristics. It was revealed that ZrN single-phase coatings of cubic modification with fine-crystalline grains of 20 nm in size were formed. The corrosion resistance of coatings has been tested in 0.9% quasiphysiological NaCl solution.