Materials Literature
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A brazing alloy has been developed for brazing ferritic-martensitic steels. The technology for producing the brazing alloy based on nickel in the form of amorphous ribbons is described. Steels EP-450 DUO and EP-823 were brazed using the new brazing alloy. The relationships of the formation of brazed joints were determ…
The equilibrium properties of a minimal tiling model are investigated. The model has extensive ground state entropy, with each ground state having a quasiperiodic sequence of rows. It is found that the transition from the ground state to the high temperature disordered phase proceeds through a sequence of periodic arr…
Abstract Metallic catcher foils have been investigated on their thermal release capabilities for future superheavy element studies. These catcher materials shall serve as connection between production and chemical investigation of superheavy elements (SHE) at vacuum conditions. The diffusion constants and activation e…
Abstract We investigated the total oxidation of toluene over Cu/MOx/SiO2 (M = metal) catalysts. Among the metal oxides used to modify the SiO2 support, TiO2 afforded the catalyst with the highest activity. The optimum Cu and TiO2 loadings were 3 and 10 wt %, respectively. Changes in the Cu loading had little influence…
We consider the problem of designing antireflection coatings by numerical optimization methods with merit functions in different metrics. The dependence of the optimal solution on the metrics is investigated through numerical experiments on several types of coatings, using the average and maximal values of the reflect…
Abstract We report on the sputter deposition of copper oxide sulfides Cu 2 O 1– x S x up to a composition of Cu 2 O 0.61 S 0.39 . For higher sulfur contents the films first become amorphous and then change to Cu 2 S. Within the range 0 < x < 0.39 the cubic crystal structure is maintained and the lattice constant…
In random packings or tilings, the size distribution of individual elements (domains) and the statistics of numbers of neighbours of those domains are strongly correlated. In the case of circular disks forming a random packing in the plane, it has long been known empirically that a certain critical amount of bidispers…
We report ferromagnetic, TC=240 K, and metallic, TMI=250 K, behaviors of a three unit cell thick interface engineered lanthanum manganite film, grown by metalorganic aerosol deposition technique on SrTiO3(100) substrates. Atomically resolved electron microscopy and chemical analysis show that ultrathin manganite films…
Using the first-principles exact muffin-tin orbitals method in combination with the coherent potential approximation, we investigated the magnetic properties, exchange interactions, and temperature-dependent half-metallicity of the Co2Mn(Ga1-xZx) (Z=Si, Ge, Sn) alloys. The total magnetic moment follows perfectly a pre…
ABSTRACT Polymerization of diethyl vinylphosphonate (DEVP) is achieved by using lanthanide tris(borohydride) complexes, Ln(BH 4 ) 3 (THF) 3 (Ln = Y, La, Nd, Sm, Gd, Dy, Lu) as an initiator. The characteristics and mechanism of polymerization as well as the properties of the resulting poly(diethyl vinylphophonate)s (PD…
In this work, ZnO nanotowers with layer-by-layer structure were prepared using Zn as a source at 700 °C via the chemical vapour deposition method. In the growth process, the Zn vapour pressure was considered as the crucial factor determining the growth behaviour of reagent species, and a competitive model between axia…
In this paper, the microscopic mechanism for structural, ferroelectric, and magnetic stabilities in displacive perovskite structured multiferroics is investigated by studying BiFeO3-PbTiO3 solid solutions. The results revealed that thermal stability and ferroic orders are intimately connected with the changes in A and…
The motion and annihilation of a grain boundary (GB) in graphene are investigated by tight-binding molecular dynamics (TBMD) simulation and ab initio local density approximation total energy calculation. A meandering structure of the GB is found to be energetically more favorable than other structures, in good agreeme…
Erstaunlich wandlungsfähiges Ammoniak: Der molekulare, auf einer ferromagnetischen Co-Oberfläche fixierte Spinzustand eines NiII-Porphyrins kann durch Aufnahme bzw. Abgabe eines gasförmigen NH3-Liganden reversibel zwischen einem Spin-Aus- (S=0) und Spin-An-Zustand (S=1) geschaltet werden (siehe Bild). Diese Beobachtun…
The effectiveness of amine-borane as reducing agent for the synthesis of iron nanoparticles has been investigated. Large (2-4 nm) Fe nanoparticles were obtained from [Fe{N(SiMe3)2}2]. Inclusion of boron in the nanoparticles is clearly evidenced by extended X-ray absorption fine structure spectroscopy and Mössbauer spe…
Effect of Fe layer thickness and Fe/Co intermixing on the magnetic properties of Sm–Co/Fe bilayer exchange-spring magnets, Saravanan, P, Hsu, Jen-Hwa, Gayen, Anabil, Singh, Akhilesh K, Perumal, A, Reddy, G L N, Kumar, Sanjiv, Kamat, S V
Plasmon resonances and the plasmon-induced field enhancement (FE) in sodium nanoring dimers are investigated by time-dependent density functional theory. For larger separations, the optical absorption, the induced charge response and the frequency dependent current demonstrate that there are two capacitive coupling pl…
Two new tetrathiafulvalene based receptors in which the favorable redox properties of the tetrathiafulvalene unit are coupled to either a benzo-crown (X = O) or a dithiabenzo-crown (X = S) ether binding site were designed and synthesized as receptors for K(+) and Ag(+). The receptors display a good (K(+), X = O) to st…
Artificial neural network (ANN) model was used for predicting colour properties of 100% cotton denim fabrics, including colour yield (in terms of K/S value) and CIE L*, a*, b*, C *, and h ° values, under the influence of cellulase treatment with various combinations of cellulase processing parameters. Variables examin…
High thermal resistance of thermal insulating fabrics is a major factor in the decision to use them in protective apparel applications, sleeping bags and other functional textiles. New standards and new applications of fibre layers in industrial textiles require more accurate methods of testing of their thermal resist…