Materials Literature
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Abstract The new deep‐blue iridium complex, Ir(dppfm)2pic, consisting of a phosphoryl group at the 3′‐position of the phenyl ring and a methyl group at the 4‐position of pyridine, was synthesized and characterized for applications in organic light‐emitting diodes (OLEDs). Ir(dppfm)2pic exhibited an emission peak of 45…
It has been shown that thermal effects measured calorimetrically during heating of the bulk metallic glass Zr 46 Cu 46 Al 8 can be interpreted as a result of the annihilation or generation of structural “defects,” which are similar in their properties to interstitial dumbbells in simple crystalline metals. The shear s…
Electrochemical preparation of chelates based on 5-ethynyl-2 H -tetrazole on the surface of iron, cobalt, and nickel results in colored polymer film at low current density. At higher current density the polymer chelate is transferred into the solution. The composition and structure of the polymer chelates has been stu…
Liquidus projections in characteristic sections of the Al-Fe-Mn-Ni-Si system in a range of up to 9% Ni, to 3% Fe, to 2% Mn, and 3% Si (wt %) are computed. The element concentrations at which the primary crystallization of the Al 3 Ni, Al 9 FeNi, Al 3 Fe, Al 6 (Fe, Mn), and Al 15 (Fe,Mn) 3 Si 2 intermetallide phases ar…
Operational characteristics of vacuum triodes with a field emitter array with a hafnium nitride emitter, have been investigated in harsh environments. Cnrrent-voltage characteristics up to 300°C or down to -130°C were investigated. Current-voltage characteristics before and after the ion irradiation were also investig…
Photometric data on the aggregation stability of Al 2 O 3 hydrosols prepared from Aeroxide Alu C nanopowder in NaCl solutions at pH 4.5 and 5.5 have been discussed within the framework of the generalized Derjaguin-Landau-Verwey-Overbeek theory. Analysis of the pair interaction potentials in an ensemble of particles of…
This paper propose a novel magnetically levitated synchronous permanent magnet planar motor with concentric structure windings. The analytical model of the novel magnetically levitated synchronous permanent magnet planar motor is established, flux density distribution of the two-dimensional Halbach magnet array is obt…
To improve the wear properties of AZ91D magnesium alloys, a Cu0.9NiAlCoCrFe high entropy alloy (HEA) coating was fabricated on AZ91D magnesium alloys by laser cladding using prealloyed Cu0.9NiAlCoCrFe powders. The microstructure of the HEA coating was characterized by OM, SEM and XRD. The wear resistance of the HEA co…
This study provides new data on the strontium distribution and behavior in groundwater from the Permian aquifer system, which is used for public water supply in the Velsk region of Arkhangelsk District. We used data from recent sampling of groundwater and host rocks as well as data from previous studies over the last…
The electrical and optical properties of the indium tin oxide (ITO)/epoxy composite exhibit dramatic variations as functions of the ITO composition and ITO particle size. Sharp increases in the conductivity in the vicinity of a critical volume fraction have been found within the framework of percolation theory. A cond…
Metal-physical principles of fabricating a gradient material—a material with a given distribution of regions with different physical and mechanical properties—are described. The possibility of the preparation of such material is demonstrated by the example of alloys of the iron-chromium-nickel system of the austenite-…
Spidergon is a popular NoC (Network-On-Chip) developed to realize cost effective multi-processor SoC (MPSoC) using a fixed optimized topology [1]. Increasing diversity of applications, quality of service requirements and deterministic routing schemes inhibit the performance by creating congestion bottlenecks. This pap…
Magnetic properties of indium antimonide doped by Mn and by, simultaneously, Mn and Zn, and Mn and Cd have been analyzed. It has been established that the basic contribution to the formation of the magnetic properties of these materials comes from clusters, whose composition and Curie temperature change depending on t…
The stable adsorption of chitosan nanoparticles (CNs) onto cotton fabrics was successfully developed without any chemical binders. The adsorption kinetics, thermodynamics, and capacities under different experimental conditions were investigated. The structure and laundering durability of CNs‐adsorbed cotton fabrics (C…
The influence of the growth rate on the shaping and quality of Bi 4 Ge 3 O 12 (BGO) crystals during their growth by the low-thermal-gradient Czochralski technique has been studied. Several series of BGO crystals have been grown with the rate varying from 0.3 to 15 mm/h. The limited growing rates at which the crystal q…
A numerical study is presented to examine the effects on countercurrent flow limitation (CCFL) of the shape and size of hot leg models with a rectangular cross section. The CCFL was described in terms of Wallis parameters using the channel height H as the characteristic length. Numerical simulations, using the computa…
Surface plasmons (SPPs) supported by graphene cylindrical waveguides are investigated for the first time, and a rigorous dispersion relation is derived for the dominant mode. This relation reveals a fundamental connection between SPPs in carbon nanotubes and graphene sheets, which appear as limiting cases of plasmons…
A cathodic catalyst, which can replace monoplatinum commercial catalyst, is developed and investigated. New catalyst combines a smaller consumption of platinum with a higher mass activity and corrosion resistance. A method of fabrication of ternary (PtCoCr/C) catalyst is improved in order to obtain the catalytic syste…
A technique for the formation of multilayer structures of aggregates of polymethine cationic dyes on a platform of 2D-nanoaggregates of anionic dyes has been developed. It is established that the anionic platform stimulates the growth of aggregates of cationic dyes according to the method of matrix synthesis. It is sh…
The effect of B additions on the structure and mechanical and tribological properties of Cu coatings produced by magnetron sputtering from mosaic targets has been investigated. It has been shown that the introduction of B results in structure refinement of the coatings. The hardness, elasticity modulus, elastic recove…