A5033311119- MXene and MAX Phase Materials
- Advanced ceramic materials synthesis
- Aluminum Alloys Composites Properties
- Fusion materials and technologies
- Metal and Thin Film Mechanics
- Advanced materials and composites
- Muon and positron interactions and applications
- Nuclear Materials and Properties
- Intermetallics and Advanced Alloy Properties
- Ion-surface interactions and analysis
- Metallurgical and Alloy Processes
- Graphene and Nanomaterials Applications
- Titanium Alloys Microstructure and Properties
- Material Properties and Applications
- High-Temperature Coating Behaviors
- High Entropy Alloys Studies
- Additive Manufacturing and 3D Printing Technologies
- Advanced Materials Characterization Techniques
- Electromagnetic wave absorption materials
National Research Tomsk State University
2020-2024
Tomsk Polytechnic University
2020-2024
Zr/Nb nanoscale multilayer coatings (NMCs) were studied after hydrogenation in a gaseous environment at 400 °C. The hydrogen distribution and content determined by pressure time. Increasing the from 0.2 to 2 MPa resulted different within NMCs, while concentration remained constant 0.0150 ± 0.0015 wt. %. increased 0.0165 0.001 0.0370 % when time was extended 1 7 h. δ-ZrH hydride phase formed Zr layers with crystals reorienting towards [100] direction. Nb(110) diffraction reflex shifted...
Hydrogen separation membranes are one of the most promising technologies for hydrogen purification. The development high-entropy alloys (HEAs) is driven by a "cocktail effect" elements with different affinities to prevent hydride formation and retain high permeability due single-phase BCC structure. In this paper, equimolar non-equimolar Nb-Ni-Ti-Zr-Co entropy were fabricated arc melting. microstructure phase composition analyzed scanning electron microscopy X-ray diffraction, respectively....
Radiation damage is one of the significant factors limiting operating time many structural materials working under extreme conditions. One promising directions in development that are resistant to radiation and have improved physical mechanical properties creation nanoscale multilayer coatings (NMCs). The paper devoted experimental comprehension changes defect structure (NMCs) with alternating layers Zr Nb irradiation. Series Zr/Nb NMCs different thicknesses individual were fabricated by...
The effect of helium ion irradiation on the microstructure and properties composites based Zr/Nb nanoscale multilayer coatings (NMCs) was studied. X-ray diffraction (XRD), transmission electron microscopy (TEM), variable-energy Doppler broadening spectroscopy (DBS) were used for in-depth analysis defects in irradiated NMCs. After NMCs with ions at a 1017 ion/cm2 dose, layered structure generally retained, but internal stresses layers increased, which caused wave-like distortion deposition...
The effect of proton irradiation on the structure, phase composition, defect state and nanohardness Zr/Nb nanoscale multilayer coatings was investigated. Preservation layered structure with 50 100 nm thick layers, observed after protons at 1720 keV energy 3.4 × 1015, 8.6 1015 1016 ions/cm2 fluences, interfaces remained incoherent. In individual layer thicknesses 10 25 nm, there were insignificant fluctuations in interplanar distance, which influenced by changes fluence, partially destroyed...
In this work high strength and tough metal‐ceramic laminated composites are fabricated by spark plasma sintering (SPS) of Ti 3 Al(Si)C 2 MAX‐phase filled preceramic papers (TAC) ductile Nb foils. The is carried out at 1250 °C 50 MPa for 5–20 min. Various stacking techniques used to obtain Nb/TAC with different architectures. SPS results in the formation reaction layer (RL) a complex composition, which changes thickness insignificantly increasing time. possible mechanism RL discussed. bending...
Nanoscale multilayer coatings (NMCs) with different crystal structures are considered as capable of self-healing after radiation damage due to the recombination vacancies and interstitials. This work is focused on a defect distribution study NMCs based Zr/Nb layers (25/25 nm 100/100 nm) proton irradiation. Coatings total thickness 1.05 ± 0.05 µm were irradiated by 900-keV protons using pelletron-type electrostatic accelerator an ion current 2 µA for durations 60 min 120 min. The influence...
Nanoscale multilayer coating (NMC) based on Zr/Nb layers (100/100 nm) before and after H+ irradiation was investigated by combining experimental techniques with first-principles calculations. Detailed studies of structural phase state defect structure NMC were performed using methods transmission electron microscopy, X-ray analysis, glow discharge optical emission spectrometry, the Doppler broadening spectroscopy variable energy positron beam. The calculations binding energies for hydrogen...
The microstructure, phase composition and hardness of equimolar high entropy multicomponent alloys Nb-Ni-Ti-Zr-Co synthesized by arc melting are presented. microstructure the were analyzed scanning electron microscopy X-ray diffraction, respectively. It was found that BCC-(Nb, Ni, Ti, Zr, Co) niobium-enriched BCC-Nb(Ni, phases formed in Nb20Ni20Ti20Zr20Co20 alloy, while addition to above BCC phases, B 2-Ni(Ti, Zr), 2-CoZr, ZrNi present different ratios Nb45(NiTiZrCo)13 Nb75Ni6Ti9Zr5Co6...
In this work, laminated metal-ceramic composites based on Ti3Al(Si)C2/Nb were obtained by spark plasma sintering of preceramic paper sheets with a MAX-phase Ti3Al(Si)C2 filler and Nb foils at temperature 1250 °C pressure 50 MPa for 3, 5, 10 20 minutes. The effect dwell time the microstructure, phase composition, mechanical properties was analyzed. It is established that does not affect composition composites, although it leads to insignificant changes in reaction layer. layer complex...
New metal–ceramic laminated composites Ta/Ti3Al(Si)C2–TiC were obtained by spark plasma sintering. The samples synthesized at a temperature of 1250°C and pressure 50 MPa for 5 min. For the formation composites, preceramic paper with powder filler based on MAX phase Ti3Al(Si)C2, as well metal foils made tantalum, used. composition, microstructure elemental composition analyzed X-ray diffraction, scanning electron microscopy energy dispersive spectroscopy, respectively. It was found that...
Abstract This paper is devoted to the fabrication of laminated Ti 3 SiC 2 /Zr based composites from filled preceramic and Zr powder. The represented a “layers-by-layer” structure were sintered by spark plasma at 1400 °C 50 MPa for 10-30 min. densification behavior during sintering, microstructure obtained influence holding time on phase composition studied.