Materials Literature
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A materials synthesis technique was recently developed to generate polymer/nanoparticles composite microcapsules in which synthetic polyamines such as polyallylamine and/or polylysine were crosslinked with multivalent anions to form polymer-salt aggregates, that then served as templates for deposition of nanoparticles…
Prediction of conductivity and concentration of saline solutions and sea water are calculated from dielectric spectra at microwave frequencies of 2 GHz and 5 GHz respectively. The calculation is based on two different previously published empirical models relating to conductivity and concentration. An empirical relati…
De part ses nombreuses proprietes physiques et chimiques, la silice est utilisee dans une large gamme de materiaux dont les proprietes sont souvent lies a des phenomenes surfaciques entre cette derniere et de la matiere (bio)organique. L’objectif de ce travail de these est d’etudier ces interfaces hybrides par une app…
采用铜模吸铸法制备了阶梯形的Zr61.6N16.6Cu13.8Al8非晶合金，利用x射线衍射（XRD）分别对不同直径的合金试样进行结构分析，利用万能试验机及扫描电镜对试样进行压缩试验和断口形貌分析。研究表明，由于冷却速度的影响，合金试样直径为3mm时是非品结构；直径为4mm和6mm时晶体相增多，甚至为完全晶体相结构；对于Zr61.6N16.6Cu13.8Al8合金，直径为3mm时的断裂强度可达到1703MPa，塑性变形可达到1．7％，适当体积晶体相的加入可以有效提高非晶材料的塑性。
Finite-element modeling of specimens of some objects differing in their size but identical in their geometry is considered. The results of the static, modal and harmonic analyses of these specimens are compared, using the NASTRAN-PATRAN complex. A new explanation of the scale-effect of studied objects is formulated.
Zn1−xMnxO films have been synthesized by spray pyrolysis at a substrate temperature of 400 °C with different manganese compositions that vary in the range, 0.0≤x≤0.25, on corning 7059 glass substrates. The as‐grown layers were characterized to evaluate the structure, magnetic and electrical properties. Raman spectrosc…
A liquid crystal may flow like a liquid, but its molecules may be oriented in a crystal-like way. It has a particular kind of structural orientation in one or two dimensions. This structural orientation makes the rheological properties of Liquid Crystal Polymers (LCPs) often extraordinary and only partially understood…
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 R. A. Singh, S. J. Dhoble; Novel synthesis of R9Dy(VO4)7 [R = Sr and Ba] Phosphors. AIP Conf. Pro…
Potential change of electrolytically deposited zinc on a steel substrate in time without a current is studied and at anode polarization in a solution of perchloric acid Influence of density of a polarizing current, way of preliminary preparation of a steel basis of an electrode on size of potential of a zinc covering…
Rhodococcus sp. strain DK17 possesses three megaplasmids (380 kb pDK1, 330 kb pDK2, and 750 kb pDK3). The alkylbenzene-degrading genes (akbABCDEF) are present on pDK2 while the phthalate operons which are duplicated are present on both pDK2 (ophA’B’C’R’) and pDK3 (ophABCR). DK17 with an optimal temperature of 30°C sho…
O carbureto de silício (SiC), um material cerâmico amplamente utilizado nas indústrias de refratários, de fundição e de abrasivos, é produzido industrialmente no forno Acheson através do aquecimento de uma mistura de grãos de carbono (normalmente coque de petróleo) e areia silicosa de alta pureza. Este aquecimento aco…
On example of uniaxial model there was offered the method of forming of non-linear viscous-elastic properties of materials. The offered scheme can be further applied at 3-D modeling of viscous-elastic properties, for instance, asphalt-concrete.
Ces travaux de thèse ont eu pour objectif la mise au point de revêtements anti-corrosion obtenus par voie sol-gel sur alliage de zinc et issus de solutions majoritairement aqueuse. Cette étude a donc porté sur la recherche de performances anti-corrosion demandées par la société Umicore, mais aussi, sur la compréhensio…
Catalytic centers are formed on a substrate of nickel film on a silicon substrate with a sublayer of vanadium, heated in the reactor module nanotech complex NANOFAB NTF-9 in the working atmosphere of ammonia gas, and argon. Were investigated regimes of catalytic centers in various stages of their formation is also car…
To understand the interplay of magnetism and superconductivity in oxypnictides, we have studied simultaneous carrier doping in different layers of CeOFeAs; F in CeO and Co in FeAs. The rf penetration depth shows exponential temperature dependence with gap values ∼1.9 and 1.6 meV for optimal F‐doped and F & Co‐doped sa…
ZnO has proven to be a multifunctional material with important nanotechnological applications. ZnO nanostructures can be grown in various forms such as nanowires, nanorods, nanobelts, nanocombs etc. In this work, ZnO nanostructures are grown in a double quartz tube configuration thermal Chemical Vapor Deposition (CVD)…
The self diffusions and hole volumes of amorphous region of poly(acrylonitrile)-poly(vinyl chloride) fibers were investigated by experiments of stress relaxation. The experiments of stress relaxation were carried out using the tensile tester with the solvent chamber. The flow parameters of filament fibers were obtaine…
В работе изучены структурные изменения в криогенно-деформированной меди в ходе длительной (до 2 лет) выдержки при комнатной температуре. Установлено, что структура, сформировавшаяся в результате больших (e ~ 8.2) криогенных деформаций, является нестабильной и в ней имеет место аномальный рост зерен. Показано, что данн…
Carbon materials are used extensively as supports in heterogeneous catalysis, even if they are relatively inert when compared to the inorganic oxides used commonly. These materials are cheap, have a high specific surface area and can withstand high temperature and high moisture degree. However, carbonaceous materials…
Stress and strain state calculation of the wave gear flexible shell taking into account additional strain loading is given in the article. The differential equations for determination of the loadings and motions in the flexible shell and ring collar of the wave gear are received. The solution of the equations is shown…