A5009178092- MXene and MAX Phase Materials
- Aluminum Alloys Composites Properties
- Hydrogen Storage and Materials
- Carbon Nanotubes in Composites
- Boron and Carbon Nanomaterials Research
- Photorefractive and Nonlinear Optics
- Fullerene Chemistry and Applications
- Ammonia Synthesis and Nitrogen Reduction
- Advanced ceramic materials synthesis
- Ferroelectric and Piezoelectric Materials
- Advanced Theoretical and Applied Studies in Material Sciences and Geometry
- Aluminum Alloy Microstructure Properties
- Microwave Dielectric Ceramics Synthesis
- Quasicrystal Structures and Properties
- Metallic Glasses and Amorphous Alloys
- Laser-Ablation Synthesis of Nanoparticles
- 2D Materials and Applications
- Chemical Synthesis and Characterization
- X-ray Diffraction in Crystallography
- Diamond and Carbon-based Materials Research
- Radioactive element chemistry and processing
- Gas Sensing Nanomaterials and Sensors
- Advanced Photocatalysis Techniques
- Mineralogy and Gemology Studies
- Ferroelectric and Negative Capacitance Devices
G.V. Kurdyumov Institute for Metal Physics
2016-2025
The modification of the layered silicate with a structural type 2:1 montmorillonite by cationic surfactant hexadecyltrimethylammonium bromide was carried out. obtained organomontmorillonite milled for 2–25 min in high-energy planetary ball mill. and physicochemical characteristics modified mechanochemically activated were investigated using various methods such as X-ray diffraction, thermal analysis, scanning electron microscopy, energy-dispersive spectroscopy, transmission determination...
Nanocrystalline compounds LiNb1−xTaxO3 of various compositions (x = 0, 0.25, 0.5, 0.75, 1) were synthesized by high-energy ball milling the initial materials (Li2CO3, Nb2O5, Ta2O5) and subsequent high-temperature annealing resulting powders. Data on phase composition nanopowders obtained X-ray diffraction methods, dependence structural parameters value x was established. As a result experiments, optimal runs determined, which made it possible to obtain single-phase compounds. The Raman...
In the current work, nanocrystalline powders with different compositions, namely Li0.98Pr0.02NbO3, Li0.93Pr0.02Mg0.05NbO3 and Li0.98Pr0.02TaO3 were synthesized for first time using method of high-energy ball milling starting materials (Li2CO3, Nb2O5, Ta2O5, MgO, Pr6O11), followed by high-temperature annealing. XRD data analysis confirmed absence parasitic phases in obtained compounds. The estimated particle sizes ranged from 20 to 80 nm. From nanopowders, ceramic samples prepared specially...
Clay minerals are widely used to treat groundwater and surface water containing radionuclides. In our study, the method of mechanochemical activation for increasing sorption capacity natural clay mineral montmorillonite was used. By adjusting grinding time, parameters mechanochemically activated were determined. X-ray diffraction method, scanning electron microscopy, determination specific by low-temperature adsorption–desorption nitrogen characterize mechanochemical-activated...
Quasi-continuous structural transformation from the crystalline to amorphous state takes place in graphite during ball-milling. The quantitative characteristics of a short- and medium-range orders carbon nanomaterials structure are determined by combined application X-ray diffraction analysis, reverse Monte Carlo modeling Voronoi diagram method. High resolution TEM images revealed formation globular materials having onion-like structure. polyhedra (VP) constructed for simulated atomic...
A simple approach is presented to synthesise the high-purity MAX phase by pressureless method.This method featured short time in duration.The process executed with a high heating rate (up ≅ 10 2 K/min) that inhibits formation of objectionable phases and limits elemental loss due short-time process.The samples containing 96% wt. Ti3AlC2 are successfully synthesised using proposed technique.
The work is aimed at the development of a new sintered aluminium alloy with low temperature coefficient linear expansion that opens fundamentally opportunities for solving modern needs domestic machinebuilding and instrument-making enterprises in light materials special physical properties.Phase composition, structure properties cast alloys Al-Si-Ni different contents silicon nickel, as well powders obtained by grinding rapidly-quenched metal ribbons these high-energy ball mill are studied...
The main stages of the formation Ti3AlC2 in Ti–Al–C system and effect low-melting additive B2O3 on yield MAX phase were studied by 13C, 27Al 47,49Ti Nuclear Magnetic Resonance (NMR) XRD analysis. addition reduces synthesis temperature to 1435 °C. However, maximum is only ∼72 wt%. NMR spectra for samples synthesized under non-optimal conditions show presence TiC carbide aluminium metallic state. Both ways affirm that borates all changes fraction engaged and, as a result, prepared using B2O3.
Recently, the practical interest of researchers has attracted MAX phase Ti3SiC2. This is characterized by high electrical and thermal conductivities, low density, Young’s modulus fracture toughness. The main disadvantage existing methods for synthesis this presence impurity phases such as TiC, SiC, Ti5Si3 or TiSi2. current investigation represents results Ti3SiC2 pressureless sintering. Ti, Si, spectrally pure graphite were used to prepare powder blend. homogenization mixture was carried out...
The Al-Mg, Al-Mg-C, and Al(Sc)-Mg-C powders were prepared through the solid state mechanical alloying (MA) by ball milling. MA process was carried out in planetary mill argon gas atmosphere. phase evolution dynamics during milling for various times characterized details XRD analysis technique. Phase composition structure parameters of investigated Rietveld refinement method. It found control agent (PCA) (carbon) Al Sc accelerates metastable intermetallic formation under MA.
The MAX-phase Ti3AlC2 has been fabricated by sintering of the preliminary cold-pressed mixtures elemental powders Ti, Al and C with different contents B2O3 under pressure 320 640 MPa, respectively.Identification quantification phases have performed X-ray diffraction.It shown when we increase concentration boron oxide up to 5% wt. in initial Ti3Al1.1C2powder mixture at MPa percentage pellets after rises ∼98.5% wt.It found that high compacting fraction sintered also abruptly increases ∼98%...
Structural changes occurring in C60 fullerenes after ball-milling processing were studied. The quantitative characteristics of the local atomic configurations reconstructed by reverse Monte Carlo method structure pristine and ball-milled C60, respectively. It is shown that 3-fold rings, indicating complete amorphization crystalline fullerenes, are dominant material 14 h treatment. behavior distribution sphericity coefficient Voronoi polyhedra validates a gradual structural disordering...