The high-entropy alloy (HEA) AlFeCoNiCuCr in as-cast state and coating deposited on cooper and stainless steel substrates with the physical vapor deposition by cathode arc evaporation (PVD CAE) method was investigated using X-ray diffraction analysis and Mössbauer spectroscopy. Two fcc phases γ 1 and γ 2 and one bcc α-phase were detected in as-cast high-entropy alloys and in physical vapor deposition by cathode arc evaporation coatings. Mössbauer spectra consist of two kinds of components which belong to paramagnetic and ferromagnetic phases. The paramagnetic phases turn out predominantly in coating on cooper.Keywords: High-entropy alloy / Mössbauer effect / hyperfine magnetic fields / isomer shift Schlüsselwörter: Hochentropie-Legierung / Mößbauer Effekt / magnetisches Hyperfein-Feld / Isomerieverschiebung
The main types of state-of-the-art nitriding technologies, their advantages and disadvantages are considered. An innovative technology of ion nitriding in high-frequency helicon-discharge plasma is proposed. The hardening of steel samples via ion nitriding in a helicon discharge is experimentally revealed that (in a wide range of operating parameters) allows us to have an influence on the process of diffusion saturation with nitrogen atoms. The results of microhardness measurements along the depth of nitrided steel samples are presented (the steel grade is C45 according to the European standard EN 10027). The possibility of controlling the gradient of the tribotechnical properties of friction parts by changing the parameters of the technological process of ion nitriding in a helicon discharge is shown.
Оттиски доступнû непосредственно от издателя Ôотокопирование разрешено только в соответствии с лицензией 2018 ÈМÔ (Èнститут металлофизики им. Ã. В. Курдюмова НÀН Óкраинû) Напечатано в Óкраине.
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