Basalt fibers and fabrics made of these are characterized by excellent thermal and mechanical properties. Therefore, basalt fabrics, due to a good resistance to high temperatures, are frequently applied in the personal protection equipment (PPE). In order to improve their thermal properties and, above all, the contact heat resistance, the process of physical vapor deposition was proposed. The process of Physical Vapor Deposition (PVD) involves producing a coating on a specific substrate as a result of physical deposition of molecules, ions or atoms of the selected chemical compounds. The method selected for the test is the magnetron sputtering. It involves depositing a uniform film of chromium on the surface of the basalt fabric. In order to improve the thermal properties – especially the contact heat resistance, two values of thickness of the chromium layer deposited on the basalt fabric surface were adopted for the test. Covering 1 μm and 5 μm with the chromium layer did not fulfil the expectations and the research will be continued.
sources and on properties of protective clothing materials [ 2 , 3 ]. Given the serious potential consequences of heat-related hazards, researchers seek to modify materials used in the protective clothing to enhance their thermal resistance. Aerogel, a gel comprising a microporous solid in which the dispersed phase is the gas, is one of the materials which aroused the interest of researchers [ 4 ]. Due to their special structure, aerogels are characterized by very good insulation properties under conditions of both high and low temperatures. Silica aerogels are known
Introduction Aluminium alloys from the group 6xxx have good mechanical properties, good formability and corrosion resistance. Alloyed elements affect weldability, corrosion resistance, corrosion cracking, electrical conductivity and density. Alloying magnesium and silicon to aluminium alloys from the group 6xxx takes place in the appropriate ratio (Mg/Si = 1.73) to form the Mg 2 Si phase [ 1 ]. In practice, alloys of the 6xxx system produced by casting techniques containing excess silicon or magnesium. Excess silicon results in higher strength and increases their
frequency regions is due to the higher polarization caused by space charge. It is also observed that the values of Z′ and Z″ gradually decrease with increasing frequency and temperature. This indicates an increase in AC conductivity with the rise in temperature and frequency. Here, at low frequency, the value of Z’ decreases with the rise in temperature showing negative temperature coefficient of resistance (NTCR) type behavior, similar to semiconductors  . Fig. 5 (a) real and (b) imaginary part of impedance of LiNi 0.5 Mn 0.5 O 2 material as a function of
(eculizumab provides improved recovery of renal function in relation to plasmapheresis) [ 22 , 23 , 24 , 25 , 26 ]. Thrombotic thrombocytopenic purpura - TTP Thrombotic thrombocytopenic purpura (TTP) is a clinical syndrome that is characterized by thrombocytopenia, microangiopathic hemolytic anemia, high body temperature, disorders of the central nervous system and acute renal insuficiency[ 28 , 29 , 30 ]. It is caused by decreased activity of ADAMTS13 metalloproteinase, an enzyme that ctears apart macromolecules ofvon Wilebrand's factor (vWF) secreted by endothelial cells
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out with cross-rolled and longitudinally rolled specimens and the effect of
direction of rolling on the resistanceto pitting is studied.
Keywords: austenitic stainless steel, pitting corrosion, exposure test, cyclic
potentiodynamic test, direction of rolling
AISI 304 is the most common Cr-Ni austenitic stainless steel used in applications that
require high corrosion resistance, good formability and weldability. Ordinary uses for
this stainless steel type are found in petrochemical, chemical and nuclear industry,
food industry, architecture