Description
Tags
Results
Synthesis of LiBaZrOx ceramics with a core-shell structure
The paper presents the results of a study of the phase composition, structural properties, and applicability of perovskite-like ceramics of the LiZrBaOx type obtained by solid-phase synthesis. According to the data of X-ray phase analysis, mapping, and TEM images, it was established that the ceramic structure consists of core-shell particles where the ZrO2 phase acts as the core, and the ZrBa2O4 and Zr2Li6O7 phases are a double shell, one of which is the disordered Zr2Li6O7 shell. The presence of three phases in the structure leads to a sufficiently strong distortion of the crystalline structure, as well as its deformation. In the course of the research, the prospects of using ceramics based on LiZrBaOx as the basis for the cathode materials of lithium-ion batteries were established.
Synthesis of LiBaZrOx ceramics with a core-shell structure
The paper presents the results of a study of the phase composition, structural properties, and applicability of perovskite-like ceramics of the LiZrBaOx type obtained by solid-phase synthesis. According to the data of X-ray phase analysis, mapping, and TEM images, it was established that the ceramic structure consists of core-shell particles where the ZrO2 phase acts as the core, and the ZrBa2O4 and Zr2Li6O7 phases are a double shell, one of which is the disordered Zr2Li6O7 shell. The presence of three phases in the structure leads to a sufficiently strong distortion of the crystalline structure, as well as its deformation. In the course of the research, the prospects of using ceramics based on LiZrBaOx as the basis for the cathode materials of lithium-ion batteries were established.
The development and testing of a new method of qualitative analysis of the microstructure quality, for example of steel AISI 321 subjected to radial shear rolling
The work is devoted to the problem of quantitative evaluation of the microstructure on the example of work with the TEM study of ultrafine-grained (UFG) austenitic steel for use in nuclear power. The material was obtained by radial-shear rolling and has different features of the structural structure of the cross section (from the periphery to the center), which makes it relevant to the correct assessment of the microstructure, taking into account all the features. This is difficult to do correctly, using only existing simple methods (average grain size, degree of grain misalignment, phase ratio) and most importantly, the results can not always be compared with each other. For a more objective and unambiguous assessment of different types of microstructure, a new qualimetric technique for quantitative quality analysis was developed.