A5059312880- Metallic Glasses and Amorphous Alloys
- Material Science and Thermodynamics
- Electromagnetic Effects on Materials
- Material Properties and Applications
- HIV/AIDS Research and Interventions
- Electrodeposition and Electroless Coatings
- Surface Roughness and Optical Measurements
- Engineering and Environmental Studies
- HIV-related health complications and treatments
- HIV/AIDS drug development and treatment
- Pigment Synthesis and Properties
- Surface Treatment and Coatings
- Magnetic Properties and Synthesis of Ferrites
- Polymer Science and Applications
- Corrosion Behavior and Inhibition
- HIV, Drug Use, Sexual Risk
- Engineering Technology and Methodologies
- Laser-Ablation Synthesis of Nanoparticles
- Diamond and Carbon-based Materials Research
- Anodic Oxide Films and Nanostructures
- Homelessness and Social Issues
- Industrial Engineering and Technologies
- Diverse Industrial Engineering Technologies
- Laser Material Processing Techniques
- Magnetic Properties and Applications
Tambov State University
2008-2023
Botkin Hospital
2022
Abstract Introduction Data on safety and effectiveness of RPV from the real-world setting as well comparisons with other NNRTIs such efavirenz (EFV) remain scarce. Methods Participants EuroSIDA were included if they had started a RPV- or an EFV-containing regimen over November 2011-December 2017. Statistical testing was conducted using non-parametric Mann–Whitney U test Chi-square test. A logistic regression model used to compare participants’ characteristics by treatment group. Kaplan–Meier...
Objective: Deaths due to suicide, substance use and violence/accident may reflect similar risk factors overlap in their classification. This study aimed investigate incidence of mortality among people with HIV (PWH) these three related causes. Design: Prospectively collected data from PWH at least 18 years old under active follow-up the EuroSIDA 2007 2019 were analysed. Methods: Cause-specific Cox regression analysis was used assess factors. Results: A total 17 881 participants included,...
We study the morphological features of laser irradiation zones formed on surface bulk metallic glasses. use nanoindentation method for estimation alloys properties caused by impulse heating during irradiation.
Abstract Experimentally established the preliminary influence of hydrogen-containing medium (NACE) in cobalt-based amorphous alloys reduces temperature onset ductility during annealing. The structure surface changes forming holding samples NACE either separate NaCl crystals or branched crystalline structures on surface. A layer oxide appears nanocrystalline alloy is preventing heat exchange between sample and environment. passing impulse electric current j = 10 8 – 9 A/m 2 results increases...
Relaxation processes in amorphous and nanocrystalline alloys temperature range of –196 ÷ 80 °C have been studied. It was established that alloy stress relaxation occurs two stages. At the same time, decrease initial mechanical sample by 5 % only during holding time at least 1 hour. An increase leads to more intensive relaxation, which is manifested an rate decrease. liquid nitrogen, not observed. has proceed a similar manner, but much lower. Dependences residual on were found alloys, areas...
The influence of isochronous annealing and the deformation creep in changing temperature field on magnetic properties amorphous cobalt-based metallic alloys are studied. authors determined values coercive fields saturation magnetization after these treatments depending elemental composition. studied initial state soft with narrow hysteresis loop. study detected tendency to increase value when approaches Curie temperature. On example AMAG 180 alloy, it is shown that, at beginning, decreases...
From the moment of their creation, amorphous metallic alloys draw special attention because perfect physicochemical properties such as high strength, low Young’s modulus, and corrosion resistance. Nowadays, there are several ways for producing bulk glasses but specimens’ size is limited. Thus, industrial application construction elements, it necessary to have technologies creation quality weld joints, using laser beam welding in particular. Moreover, surface treatment advanced technology...
The effect of aggressive media (solution NACE and H2SO4 ) on the dependence σ – ε, obtained by simultaneous transmission electric current pulses accompanied short discharge stress is investigated. relief in materials density pulsed established. structural morphological state alloy surface after exposure to corrosive with different concentrations
Corrosion resistance of zirconium-based amorphous alloys in simulating a biological fluid, as well aqueous solutions hydrochloric acid (with HCl concentration 0.1, 0.2, 0.4 mol/L) was studied this work. When studying the effect samples were exposed to environment two ways. In first case, sample completely immersed corrosive liquid. second subjected local action drop fluid deposited on surface. It has been established that prolonged exposure medium leads dissolution surface layer sample,...
The authors carried out the fatigue tests for tension of metallic glass tape samples by load varying in time from some maximum value to minimum, a constant-sign cycle with frequency 2 Hz. In device construction, five sets elastic elements different stiffness coefficients are designed. For elements, calibration graphs were constructed, according which stress sample was determined displacement value. Characteristic features development cracks cobalt-based amorphous alloys and iron-based...
It has been experimentally established, that reversible electro-plastic effect, which is similar to the well-known case in crystalline metals, observed on σ(ε) diagrams for ribbon metallic glasses (MG). established passing of impulse electrical current through loaded specimen MG leads larger fall mechanical stress than furnace heating at same temperature. A linear relation between and temperature, depending alloy composition, observed. Growth duration a constant density increases specimens...