Materials Literature
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The reaction of copolymerization of N-vinylpyrrolidone with N,N'-methylen-bis-acrylamide by mass ratio 1, 2 and 3% with the presence of initiator has been conducted. It is determined that along with cross- linked polymers there are also non-cross linked homo-polymer of poly-N-vinylpyrrolidone and copolymer of N-vinylp…
Magnetic properties and magnetocaloric effects (MCE) of the tetragonal (ThCr 2 Si 2 -type) PrFe 2 Ge 2 compound are investigated. The compound is determined to be antiferromagnet with the Nel temperature T N =14.5 K and undergoes a transition towards an incommensurate modulated structure at 7 K. A fieldinduced metamag…
The excitation spectrum is calculated for two-dimensional FeAs clusters modeling iron-based superconductors with the use of the quantum Monte Carlo algorithm in the framework of the full two-orbital model. The data for clusters of the size up to 10×10 FeAs cells are presented for the first time. The dependence of disp…
Iranian Journal of Polymer Science and Technology Vol. 28, No. 3, 233-242 August-September 2015 ISSN: 1016-3255 Online ISSN: 2008-0883
We investigated the effect of Si on the tensile properties of Fe-33Mn, Fe-33Mn-4Si, and Fe-33Mn-6Si austenitic alloys (mass%) at 273, 294, 323, and 423 K. The Si addition promoted the deformation-induced ε-martensitic transformation, thereby enhancing the work-hardening capacity. In terms of Considère's criterion, the…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation Vincenzo Guarino, Rosaria Altobelli, Valentina Cirillo, Luigi Ambrosio; Electro fluido dynamic te…
In this study, the deformation behavior of a Ti-50.8 at.% Ni thin wire, which was subjected to different heat treatments, was investigated by means of uniaxial tensile tests. Considerable ductility (tensile elongation >50%) and a large variation of the stress-strain relations are observed after different heat treatmen…
In the Steiner Tree problem one is given an undirected graph, a subset T of its vertices, and an integer k and the question is whether there is a connected subgraph of the given graph containing all the vertices of T and at most k other vertices. The vertices in the subset T are called terminals and the other vertices…
We have carried out point-contact spectroscopy measurements on CeCu6 and CeAl3 to study these heavy fermion states. Temperature and magnetic field dependences of the point-contact spectra were observed in detail. At the lowest temperature of 0.4 K, differential resistance spectra of CeCu6 and CeAl3 as function of bias…
In this research, black silicate thermal control coatings were prepared with using two inorganic black pigments; copper oxide and iron oxide, in potassium silicate binder in three pigment to binder ratio then they were applied on aluminum substrate. The optical properties of coatings were measured by UV/vis spectropho…
The article covers the methodology used to design safety control systems for unattended points of technological communication on oil and gas pipelines; it gives the review of safety control system design, the relevance of the researched area and research methods; it describes the structure of an unattended point of te…
Self‐assembled monolayers (SAMs) of alkanethiols are commonly used in surface patterning, as well as in modifying the physical and chemical properties of surface. Therefore, the understanding of the formation of self‐assembled monolayers (SAMs), including its structure and different properties requires significant imp…
Samples of (1 – x)SiO2:xGeO2 compositions, containing x = 10 and 20, and doped with Er3+, were prepared by a simple sol-gel route. Homogeneous and transparent gels were synthesized and xerogels were obtained by gel annealing from 700 ºC to 1100 ºC. Films exhibiting high transmittance in the visible and near infrared w…
The increasing awareness and the quest for newer materials have given renewed interest to the development of green composites. This article focuses on the potential use of abundantly available waste agricultural residue for the preparation of composites. The mechanical properties of Rice straw fibers reinforced with P…
According to Debye relaxation, the polarization of electric dipole can be accomplished in 10-10 s under the action of an alternating electromagnetic filed with a frequency of 2.45 GHz, so it is feasible to obtain nano powder by carrying out solid reaction in microwave at low temperature in a short time. In this work,…
The paper proposes a new air-jet spinning method for the preparation of continuous twisted nanofiber yarns. The nozzle-twisting device is designed to create the 3-D rotating airflow to twist nanofiber bundles. The airflow characteristics inside the twisting chamber are studied numerically. The airflow field distributi…
Inspired by specific features of the spin-triplet superconductor Sr 2 RuO 4 , we investigate thermal transport properties for a generic chiral p -wave superconductor. One of the bands of Sr 2 RuO 4 lies close to a Lifshitz transition which would lead to a change of the Fermi surface topology and influence also topolog…
We perform a variational Monte Carlo study of the nematic state in iron-pnictide superconductors within a realistic five-orbital model. Our numerical results show that the nematic state, formed by introducing an anisotropic hopping order into the projected wave function, is not stable unless the off-site Coulomb inter…
As an effort to find a lighter shield, the wood stuffed shield was proposed in this paper based on the wood properties such as low density, low cost, high yield strength when the strain rate is high. Hypervelocity impact tests (Ф=5.5mm, V=4.79 km/s∼4.96 km/s) were carried out to compare the shielding capabilities of t…
In this paper a new topology of Permanent Magnet Synchronous Actuator (PMSA) is used for steer-by-wire application. The magnetic field patterns are determined from finite element modeling, for different rotor positions and supply currents, using FEMM software. The designed actuator geometric is, then, optimized using…