Materials Literature
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Experimental data from measurements of the induced magnetostriction of the easy-plane two-sublattice layered antiferromagnet NiCl2 in the homogeneous and multidomain states at T=4.2 K are analyzed. It is shown that the intersublattice magnetoelastic interactions are dominant in NiCl2. The induced magnetostriction of t…
The molar enthalpies of mixing, Δ mix H m , of the liquid alkali metal iodide - neodymium iodide binary systems have been measured over the whole composition range at 1068 K with an accuracy of about 6%. The apparatus used was a Calvet - type high - temperature microcalorimeter. In all the systems under investigation…
Single crystals of niobium with a longitudinal axis near to [111] were strained in tension at 78 K and at the yield point rapid localised plastic deformation occurred accompanied by a large drop in load. Surface examination indicated that kinking had occurred and the crystallographic axes had rotated by ~ 25° relative…
Abstract The objective of this study is to investigate the effect of reactive processing of commingled bottle waste polymer in an extruder. A variety of peroxides and monomers were tested to assess their influence on the final mechanical properties of the product. The reactive extruded polymer blends were prepared in…
Abstract Heating of chlorophyll a was performed at 350 °C for 12 h in relation to the origin of sedimentary benzoporphyrins. The product was oxidized by chromic acid to give phthalimide and its methyl homologs, which indicated the formation of benzopyrrole units in the substrate or its degraded fragments. The heating…
Menshikovite, ideally Pd3Ni2As3, is a new mineral species found in two localities in Russia. It occurs in a pod of coarse-grained, entirely altered gabbronorite rich in sulfides (up to 30 vol.%), hosted by a microgabbronorite, in the Vostok deposit, Lukkulaisvaara intrusion, in Karelia. There, menshikovite (up to 0.2…
We report on wetting experiments of a maleic anhydride copolymer melt on smooth horizontal silicon wafers which were either cleaned or coated with a crosslinked network of a poly(aminosiloxane). The surface properties of the solid substrates have been controlled using contact angle and zeta potential measurements, FT-…
Behavior of realistic n -pentadecane, n -C 15 H 32 ; n -tridecane, n -C 13 H 28 and n -undecane, n -C 11 H 24 on the free surface of the melt is investigated searching for the effect of chain-length on the surface-ordered phase of n -alkanes, with larger simulation cells than that in our previous work. By very slow he…
Abstract The origin of anomalous birefringence in grossular-andradite (grandite) garnets is considered. Using the point-dipole model we have calculated the anomalous optical indicatrix for four crystals (three from the paper by Takéuchi et al . (1982) and one studied previously by the present authors). The calculated…
This paper provides information of the uniform grain structure after application of hot and cold rolling conditions and recrystallization processes followed by various annealing times in NiMoCr alloy. The different structure would result in high temperature mechanical properties such as yield strength, tensile strengt…
An electrochemical sensor of hydrogen isotopes based on solid electrolytes for determining the hydrogen isotope ratios and/or total hydrogen pressures in gases has been developed. This paper describes the methodology of the hydrogen isotope sensing together with experimental results. When hydrogen isotope gases are in…
Flashover voltage, lifetimes, and switch performance of insulators utilizing square thin and thick film electrodes were examined to determine the viability of using thin electrodes for reliable surface discharge switching. Gold, silver, and platinum were sputtered (0.25 /spl mu/m) and screen printed (15 /spl mu/m) ont…
Abstract The structure of the complex { [Eu ( p ‐MOBA) 3 · 2H 2 O] · 0.5H 2 O·0.5(4,4′‐bipy)} ∞ ( p ‐MOBA: p ‐methoxybenzoate, 4,4′‐bipy: 4,4′‐bipyridine) was determined by single crystal X‐ray diffraction study. Each europium atom is coordinated with two oxygen atoms of the chelated carboxyl group, four oxygen atoms…
A severe problem with water‐borne paints containing aluminium or zinc pigments is hydrogen corrosion of these metals in the aqueous alkaline paint media. The subject of the present study is the examination of corrosion inhibition of aluminium and zinc pigments in aqueous alkaline media by different amino and polyamino…
Nine different char samples were tested in thermogravimetric analyzers with continuously rising temperatures and a global one-step kinetic reaction model was used to describe the char combustion. A mathematical method has been presented to deduce the activation energy and pre-exponential factor. The results show that…
B‐site cation order–disorder transition induced by mechanical activation was observed in Pb(Mg 1/3 Nb 2/3 )O 3 –Pb(Mg 1/2 W 1/2 )O 3 (PMN–PMW) solid solution, which was examined using both XRD diffraction and Raman spectroscopic study. The order–disorder transition is composition dependent. Mechanical activation trigg…
The principle of silver photography is based on the photosensitivity of minute silver halide crystals. The light generates clusters of a few silver atoms on the crystals. Their ensemble constitutes the latent image of extremely weak intensity and invisible. The development consists of converting chemically into metal…
Abstract A thermoplastic polyurethane (TPU) was modified by reactive processing with 4,4′‐diphenylmethane diisocyanate (MDI). The use of this modified polyurethane was investigated for improved adhesion in composites with polyamide 6 (PA 6). Specimens were prepared by two‐component injection molding. With the modified…
Electronic structures of hole-doped and electron hole-doped manganites, La 0.7 Ca 0.3 MnO 3 and La 0.7 Ce 0.3 MnO 3 , have been elucidated by X-ray absorption near-edge structure (XANES) spectra of O K- and Mn L 3,2 -edges. In the electron-doped system, La 0.7 Ce 0.3 MnO 3 , the spectral features of O K-edge spectra a…
Abstract The crystal structures and 166Er Mössbauer spectra for some β -diketonatoerbium(III) complexes have been investigated. The geometries around the Er(III) ions in [Er(dpm)3(H2O)] (1; Hdpm = 2,2,6,6-tetramethyl-3,5-heptanedione), [Er(pta)3(H2O)] (2; Hpta = 1,1,1-trifluoro-5,5-dimethyl-2,4-hexanedione) and [Er2(p…