Materials Literature
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Abstract A series of nanocomposites prepared by melt‐blending of cloisite‐based organoclays with poly(ethylene‐vinylacetate) (EVA) and neutralized poly (ethylene‐methacrylic acid) (EMA) copolymers were investigated via DSC, small‐angle X‐ray scattering (SAXS), and rheological techniques. SAXS results indicated partial…
Naturally modulated structures, films of In2O3(ZnO)5, were epitaxially grown by rf magnetron sputtering on (0001) sapphire substrates. The crystallographic and morphological features of the films were characterized by using x-ray-diffraction and electron-diffraction patterns. The deposition of strongly c axis orientat…
Ferrite grain structures created through transformation from deformed austenite under different deformation modes have been investigated for a low carbon Si–Mn steel. To introduce a large plastic strain, a specimen is compressed by a pair of anvils with edges controlled to keep the strain rate constant by using a comp…
Abstract Damage modeling of metallic materials under high strain rate loading conditions is reviewed. The emphasis is on the modeling efforts based on continuum damage mechanics, although many important references dealing with general aspects of dynamic behavior of materials are also discussed. Relevant issues on the…
The colourless title compound Tb2Se2O7 (≡ Tb2O [SeO3]2, terbium(III) oxide oxoselenate(IV)) was obtained by reacting a mixture of Tb4O7, Tb and SeO2 in a 3:2:14-molar ratio at 850 °C for seven days in an evacuated silica vessel as needle-shaped single crystals. It crystallizes tetragonally (space group: P42/ncm, a = 1…
50-nm period arrays of Co particles with widths of 35 nm and heights of 5-20 nm have been made using a self-assembled block copolymer lithography. The magnetic particles have in-plane anisotropy due to their shape, and show thermally activated reversal with an activation volume larger than their physical volume, which…
This article describes a numerical study of g-jitter driven double-diffusive convective flows and thermal and concentration distributions in binary alloy melt systems subject to an external magnetic field. The study is based on the finite element solution of transient magnetohydrodynamic equations governing the moment…
Molecular magnetism has been one of the active areas in molecular chemistry for the last 15 years. The advantages of molecule-based magnets compared to classical metal and metal oxide ones are that the magnets can be obtained through a selection of proper spin sources (e.g., transition metal ions, organic radicals) an…
Organoruthenium polyoxometalates with general formula [{Ru(C6Me6)}3M5O18], M Mo, W, serve as catalyst precursors, together with 2,6-dichloropyridine N-oxide, to effect the hydroxylation of adamantane with conversion up to 94%, and C3-H/C2-H selectivity >100. Under analogous conditions, hydroxylation of cis-decalin o…
Magnesiumchromite, MgCr 2 O 4 , undergoes a structural transition from a cubic spinel structure [space group Fd 3 m, a=8.32768(4) Å at 16 K] into a tetragonal distorted structure [space group I4 1 /amd, a=5.89199(5) Å, c=8.31677(8) Å at 10 K], isotypic with Hausmannite, Mn 3 O 4 . This phase transition is translatione…
This paper presents calculated results of iron loss distribution in an induction motor model core. The authors have analyzed the induction motor model by using the improved finite-element method considering the vector magnetic properties. The vector magnetic properties are the relationship between the measured magneti…
organic chemistry appear different from those found in other comparable textbooks (e.g.,
Article SYNTHESIS OF ISOMERS OF ORGANOTIN SUBSTITUTED POLYOXOTUNGSTATES AND COMPARISON OF THE ANTITUMOR ACTIVITY OF ISOMERS was published on September 1, 2002 in the journal Main Group Metal Chemistry (volume 25, issue 9).
The insensitive explosive 3-Nitro-1,2,4-triazol-5-one (NTO) has been recrystallized from water in an effort to prepare crystals with smaller size and narrower distribution in a batch cooling crystallizer. Two mixing devices, i.e., a mechanically stirred system with and without ultrasound in aqueous media were employed…
Low-field (B=2–80 G) DC magnetic susceptibility, χ, is investigated in ceramic La1−xCaxMn1−yFeyO3 (LCMFO) samples with x=0.3. When y is increased from 0 to 0.1 the ferromagnetic (FM) Curie temperature, TC, decreases from 259 to 107 K, indicating growth of disorder by iron doping. A transformation of LCMFO from a weakl…
Extended thermal annealing treatments were used to modify the B‐site cation order in the (1 − x )PMN– x PSN perovskite system (where PMN is lead magnesium niobate, Pb(Mg 1/3 Nb 2/3 )O 3 , and PSN is lead scandium niobate, Pb(Sc 1/2 Nb 1/2 )O 3 ). Extensive 1:1 ordering could be induced in compositions with x ≥ 0.1. Th…
Two-directional N2 desorption was found in N2O dissociation on Rh(110), Ir(110), and Pd(110) below 160 K by angle-resolved thermal desorption. N2O(a) is mostly dissociated during heating procedures, emitting N2(g) and leaving O(a). N2 showed four desorption peaks in the temperature range of 110–200 K. One of them comm…
The trash and color of raw cotton are very important and decisive factors in the current cotton grading system. In this paper, an image system is developed that can characterize trash from a raw cotton image captured by a color CCD camera and acquire color parameters. The number of trash particles and their content, s…
The L1/sub 0/-FePt ordered phase is formed at lower annealing temperature by addition of Cu. FePtCu films start ordering at 300/spl deg/C or a lower temperature, whereas FePt and FePtAg films are still disordered alloys after annealing at 300/spl deg/C. The results of X-ray diffraction indicate that FePt and the added…
Abstract Mono-dispersed mesoporous silica spheres with ordered hexagonal regularity were synthesized from tetramethoxysilane and dodecyltrimethylammonium bromide as a surfactant under very specific conditions. By adjusting the optimum concentrations of the reactants, silica particles with diverse morphology were obtai…