Structural Aspects of the Formation of Multilayer Composites from Dissimilar Materials upon High-Pressure Torsion.

A multi-metal composite was consolidated from the TiNiCu and FeNiB alloys by room-temperature high-pressure torsion (HPT). The structural research methods used in this study were X-ray diffractometry, high-resolution transmission electron microscopy, scanning electron microscopy with an electron microprobe analyzer in the mode of backscattered electrons, and the measurement of indentation hardness and modulus of the composite constituents. The structural aspects of the bonding process have been examined.

The Structure Stability of Metal Diffusion Membrane-Filters in the Processes of Hydrogen Absorption/Desorption.

The evolution of a nanostructured state of palladium-lead membrane alloys during their interaction with hydrogen was studied using precision X-ray diffraction with synchrotron radiation (SR) and scanning electron microscopy (SEM) with energy-dispersive X-ray spectroscopy (EDXS). The importance of this topic is due to the need and demand for improving the performance characteristics of dense metal diffusion filters for high purity hydrogen separation processes. Palladium-based membrane filters with lead concentrations of 5 and 20 wt.

Synthesis and HRTEM Investigation of EuRbFeAs Superconductor.

In the stoichiometric iron-based superconductor EuRbFeAs, superconductivity coexists with a long-range magnetic ordering in Eu layers. Using high-resolution transmission electron microscopy (HRTEM), we observed an atomic structure of as-grown EuRbFeAs crystals. HRTEM shows that crystals have two-dimensional intrinsic nanoinclusions established to be the RbFeAs (122) phase with a volume fraction of ~5.

Microstructure and superconducting properties of high-rate PLD-derived GdBaCuO coated conductors with BaSnO and BaZrO pinning centers.

The microstructure of GdBaCuO based on superconducting tapes with BaSnO and BaZrO artificial pinning centers formed by high-rate pulse laser deposition in SuperOx Japan was studied by scanning/transmission electron microscopy. The artificial pinning centers have adopted columnar morphology with average diameter of about 8 nm (BaSnO-doped sample) and 6.5 nm (BaZrO-doped sample) and density of 500 μm for the both samples.

[Endoscopic sclerotherapy of esophageal varicose veins in portal hypertension].

The results of endoscopic sclerotherapy (EST) in the patients with portal hypertension (PH) are analyzed. Efficacy of methods in the treatment of gastroesophageal varicosity in urgent situations (bleeding) and "cold" period was evaluated. Schemes of staged minimally-invasive surgical correction of PH syndrome are described.