Characterization of high pressure oxygenated EuBCO and GdBCO coated conductors

Program and book of abstracts / 2nd International Conference on Innovative Materials in Extreme Conditions i. e. (IMEC2024), 20-22 March 2024 Belgrade, Serbia

Structure, mechanical characteristics and high-temperature stability of sintered under high and by hot pressing ZrB2- and HfB2–based composites

Program and book of abstracts / 2nd International Conference on Innovative Materials in Extreme Conditions i. e. (IMEC2024), 20-22 March 2024 Belgrade, Serbia

The influence of Ni content on the wear resistance of cast high-entropy alloy VCrMnFeCoNiх

Робота присвячена дослідженню зносостійкості системи високоентропійних сплавів VCrMnFeCoNiх при терті по нежорстко закріплені абразивні частинки. В експерименті використовувалися сплави системи VCrMnFeCoNiх (де х = 1,0; 1,5; 2,0 в молярному співвідношенні) отримані методом аргоно-дугового переплавлення. Досліджується фазовий склад, зносостійкість, мікроструктура і мікротвердість даної системи.Работа посвящена исследованию износостойкости системы высокоэнтропийных сплавов VCrMnFeCoNiх при трении о не жестко закрепленные абразивные частицы. В эксперименте использовались сплавы системы VCrMnFeCoNiх (где х= 1,0; 1,5; 2,0 в молярном соотношении) полученные методом аргоно-дуговой плавки. Исследуется фазовый состав, износостойкость, микроструктура и микротвердость данной системы.The article describes the researching of wear resistance of high-antropy alloys system VcrMnFeCoNiх when frictioning against non-rigid fixed abrasive particles. The alloys of system VcrMnFeCoNiх (where х= 1,0; 1,5; 2,0 in molar ratio) obtained by the method of argon-arc welding have been used in the experiment. The phase composition, wear resistance, microstructure and microhardness of the mentioned system have been also examined

The influence of Ni content on the wear resistance of cast high-entropy alloy VCrMnFeCoNiх

Робота присвячена дослідженню зносостійкості системи високоентропійних сплавів VCrMnFeCoNiх при терті по нежорстко закріплені абразивні частинки. В експерименті використовувалися сплави системи VCrMnFeCoNiх (де х = 1,0; 1,5; 2,0 в молярному співвідношенні) отримані методом аргоно-дугового переплавлення. Досліджується фазовий склад, зносостійкість, мікроструктура і мікротвердість даної системи.Работа посвящена исследованию износостойкости системы высокоэнтропийных сплавов VCrMnFeCoNiх при трении о не жестко закрепленные абразивные частицы. В эксперименте использовались сплавы системы VCrMnFeCoNiх (где х= 1,0; 1,5; 2,0 в молярном соотношении) полученные методом аргоно-дуговой плавки. Исследуется фазовый состав, износостойкость, микроструктура и микротвердость данной системы.The article describes the researching of wear resistance of high-antropy alloys system VcrMnFeCoNiх when frictioning against non-rigid fixed abrasive particles. The alloys of system VcrMnFeCoNiх (where х= 1,0; 1,5; 2,0 in molar ratio) obtained by the method of argon-arc welding have been used in the experiment. The phase composition, wear resistance, microstructure and microhardness of the mentioned system have been also examined

Development of oxidation-resistant and electrically conductive coating of Ti–Al–C system for the lightweight interconnects of solid oxide fuel cells

The paper studies oxidation resistance and electrical conductivity of dense coatings produced by vacuum-arc deposition technique on α-titanium thin (0.1 mm) substrate using a hot pressed Ti2AlC–TiC target. The coatings were deposited at low (7 mA/cm2) and high (15 mA/cm2) current densities on the substrate and marked LCD and HCD, respectively. This provided different local chemical and phase compositions of the coatings. It was found that phase compositions of the coatings differ from that of the target. The HCD coating has high oxidation resistance evaluated in terms of the specific weight gain (Δm/S = 0.06 mg/cm2) as well as high surface electrical conductivity (σ = 1.23·106 S/m) after long-term (1000 h) holding at 600 °C in the air due to the formation of an over thin (450 nm) Ti–Al-(C, O, N) near-surface layer. The thin titanium substrate with such Ti–Al–C coating is recommended as a lightweight interconnect of an intermediate-temperature solid oxide fuel cell

Influence of Oxygen and Boron Distribution on the Superconducting Characteristics of Nanostructural Mg-B-O Ceramics

International audienc

Structural phase transformations in annealed Pt/Mn/Fe trilayers

Thermally-activated phase transitions in Pt/Mn/Fe thin films were investigated by a combination of x-ray diffraction, transmission electron microscopy, secondary neutral mass spectrometry depth profiling, atomic force microscopy, and magnetic properties measurements. Post-annealing was carried out in vacuum to different temperatures up to 620 °C. Initially, at temperatures between 280 °C – 450 °C first L10-MnPt is formed at the Mn/Pt interface followed by the most likely formation of metastable bcc Fe3Pt, which gets transformed by further annealing to fcc Fe3Pt and eventually to chemically ordered L12-Fe3Pt. The final product after annealing at 620 °C consists of two interesting phases, which are relevant for spintronic applications, antiferromagnetic L10-MnPt with addition of Fe and ferromagnetic L12-Fe3Pt, consistent with the initial element composition

Structure and Properties of MgB2: Effect of Ti-O and TiC Additions

IEEE The effects of the additions of powdered titanium carbide (TiC) and polyvalent titanium oxides (Ti-O) to MgB2 (synthesized under high pressure (2 GPa)-high temperature (800 and 1050 & #x00B0;C) conditions) on the critical current density, jc, critical magnetic fields, BC2 and Birr, and the related transformations in the materials structures are reported. The superconducting characteristics are compared with that of MgB2 with titanium (Ti) additions synthesized under the same conditions. The synthesis temperature, the ability of Ti-containing compounds to act as a getter, and the different diffusion rates of Mg and B into grains of these additions influence the distribution of the elements (boron, magnesium and impurity oxygen) in the structures of MgB2-based materials. This in turn affects the formation of pinning centers, the resulting flux pinning and eventually the superconducting properties (jc, BC2, Birr)

Temperature–pressure induced nano-structural inhomogenities for vortex pinning in bulk MgB2 of different connectivity

International audienc