Materials Literature
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Research of residual stresses in steel at different depths from its surface is presented in this paper. The material used for research was AISI 310S heat resistant steel (containing approx. 0.2%C, 25%Cr and 20%Ni) in form of a rolled steel sheet with a thickness of 2mm. Stress measurements were conducted with the use…
Preceramic compounds based on polycarbosilane and 2,2′-diallylbisphenol A with different weight ratios of the starting components were investigated. According to the data of gel permeation chromatography, simultaneous thermal analysis, and IR spectroscopy, the mixture components chemically react in the temperature int…
Using transmission electron microscopy methods the layer by layer analysis of rails differentially quenched in different regimes is carried out on different scale levels. It is shown that the differentiated quenching of rails is accompanied by the formation of morphologically different structure, being produced accord…
Interference of phonon and magnetic dipolar spin-spin interaction mechanisms in a finite magnet can result in a previously unexplored class of nonexchange spin waves.
Nanocomposites comprising well-mixed semiconductor nanocrystals and conjugated polymers that have relative offset energy band structures can not only complement the light absorption range of the solar spectrum but also result in a dissociation of charge-transferred excitons upon absorption, with electrons transferring…
Two random propylene-based copolymers with close mole content of ethylene and 1-butene as co-units were fractionated into solubles and insolubles in 1,2,4-trichlorobenzen at room temperature. The two copolymers and the fractions were characterized by using gel permeation chromatography, 13C nuclear magnetic resonance…
The characteristics including surface morphology, phase constitution, thickness and the corrosion resistance of the porously anodic films prepared in the sulfuric electrolyte with different additives at 35°C were investigated by SEM, EDS, XRD and electrochemical polarization method in this paper. The additives are org…
Based on the solid - liquid two-coupling theory, Use abrasive medium viscosity-temperature characteristics related to the mathematical model, using solid - liquid two-phase solution method Mixture models and standards, turbulence model combining with common rail pipe hole as the research object, choose different initi…
A new immobilization technique that encapsulates B. pasteurii in the fine waste cement mortar particles (FWM) was being investigated to induce CaCO3 precipitation in reducing porosity and refining pore size of old cement mortar (OCM), where FWM particles were crushed from old cement concrete and passed through a size…
We have analyzed the hysteretic properties of thermal and pressure induced low spin (LS)↔high spin (HS) phase transition of a 3-D spin crossover (SCO) nanostructure when the cluster architecture is progressively changed from a cubic to a thin film. For solving the 3-D Ising-like Hamiltonian, the Monte Carlo metropolis…
We theoretically study the polarization-induced band inversion phenomenon in c-plane In-rich InGaN/GaN quantum wells. Our calculations performed using the k p method with the 8 8 RashbaShekaPikus Hamiltonian for the structures with the indium content between 90% and 100% show that the reordering of the conduction and…
Investigation of mechanical state of shape memory alloy pipe-coupling had an important significance in engineering field. Theory of plastic deformation was used to analyze the coupling force in the tube connecting process of NiTiNb shape memory alloy, in this paper. Based on the analyzed results a mechanical modeling…
The number of constructions with elements that are directly exposed to corrosive hydrogenous media is growing all over the world. This is why the problems of the design of engineering models of crack development in the elements of machines and constructions continuously affected by corrosive hydrogenous media are urge…
Materials used on exterior spacecraft surfaces are subjected to many environmental threats which can cause degradation, atomic oxygen is one of the most threats. We prepared organic silicon atomic-oxygen-protection film using method of polymerization. This paper presented the effects on the film structure and its dura…
Selective-emitter structures have been studied to improve the conversion efficiency of crystalline silicon solar cells. However, such structures require additional complicated processes and incur extra cost. In this work, we used phosphorus paste (P-paste) to form a heavily-doped region beneath the grid and POCl 3 to…
A method for preparing atomically smooth gallium nitride (GaN) surface with high material removal rate that involves chemical mechanical polishing with sulfate radical (SO4-) oxidizer and Fe2+activator in slurry is presented. The results indicate that complexing agent with Fe2+activator is the key point to obtain atom…
The execution of quality management (QM) and quality assurance activities in the construction of a fusion device is a very complex task. Nevertheless, QM is a useful management tool, if we comprehend QM as the request for continuous reflection on present tasks and on the best way to improve the processes with respect…
Cover: A highly porous silica particle used as a support for metallocene catalyst is emulated on two geometrically well-defined support structures for the study of ethylene polymerization kinetics and nano- and micron-scale polymer growth morphologies. Further details can be found in the article by Kyu Yong Choi and c…
We have studied the effects of high-energy electron-beam irradiation on the superconducting transition properties of an YBCO bicrystal junction, a focused ion-beam (FIB)-patterned YBCO nanobridge, a MgB2 intergrain nanobridge, and a BaKFeAs multigrain microbridge. We used one sample for each junction type and repeated…
Based on side lateral scattering technique, a particle analysis apparatus for clinical liquid sample provided a precise and accurate method to acknowledge and transversely compare the particle properties at the micro-level. To improve the detection capability and lessen the lower detection limit of particle size, a ph…