For the first time, we report on the structural and magnetic properties of a polycrystalline sample of NiNbO from I-type (2), obtained by the partial cosubstitution of Nb by Ti and W. The crystal structure is investigated by combining synchrotron X-ray, neutron, and electron diffraction at room temperature. This I-type structure is derived from the corundum-like NiNbO II-type () and is noncentrosymmetric and polar.
View Article and Find Full Text PDFAlSiC is a ternary wide-band-gap semiconductor with a high strength-to-weight ratio and excellent oxidation resistance. It consists of slabs of AlC separated by SiC layers with the space group of 6. The space group allows Si to occupy two different 2 Wykoff sites, with previous studies reporting that Si occupies only one of the two sites, giving it an ordered structure.
View Article and Find Full Text PDFThe magnetic properties of TbMgNiCo intermetallic compounds and selected hydrides and deuterides of this system have been studied by various techniques, including magnetic measurements, in situ X-ray and neutron powder diffraction. The intermetallic compounds crystallize in a SnMgCu-type structure and magnetically order below a Curie temperature (), which increases exponentially with the Co content. This can be due to the ordering of the Co sublattice.
View Article and Find Full Text PDFHigh-entropy materials, with complex compositions and unique cocktail characteristics, have recently drawn significant attention. Additionally, a family of sodium super ion conductors (NASICONs)-structured phosphates in energy storage areas shows a comprehensive application for traditional alkaline ion batteries and, in particular, solid-state electrolytes. However, there is no precedent in fabricating this kind of NASICON-type high-entropy phase.
View Article and Find Full Text PDFDue to their superb mechanical properties and high specific mass, tungsten heavy alloys are used in demanding applications, such as kinetic penetrators, gyroscope rotors, or radiation shielding. However, their structure, consisting of hard tungsten particles embedded in a soft matrix, makes the deformation processing a challenging task. This study focused on the characterization of deformation behavior during thermomechanical processing of a WNiCo tungsten heavy alloy (THA) via the method of rotary swaging at various temperatures.
View Article and Find Full Text PDFAdvanced thermomechanical hot rolling is becoming a widely used technology for the production of fine-grained spring steel. Different rapid phase transformations during the inductive heat treatment of such steel causes the inhomogeneous mixture of martensitic, bainitic, and austenitic phases that affects the service properties of the steel. An important task is to assess the amount of retained austenite and its distribution over the cross-section of the inductive quenched and tempered wire in order to evaluate the mechanical properties of the material.
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