Materials Literature
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Quasi-static and dynamic magnetomechanical measurements have been made on a twin-freeoriented single crystal of Tb/sub 0.27/Dy/sub 0.73/Fe/sub 2/ (Terfenol-D). Unusually large values of dynamic strain coefficient, d/sub 33/, and magnetomechanical coupling coefficient, k/sub 33/, of 19.1 nm A/sup -1/ and 0.83 respectiv…
A novel class of telechelic α-alkyl ω-trimethoxysilane poly(N-propionylethylene imine)s (TMS-PPEls) has been synthesized by living cationic ring-opening polymerization of 2-oxazolines. A new route for the termination reaction of the living polyoxazoline is described. These block copolymers have been tested as coatings…
A series of macrocyclic heterobimetallic complexes of type [M c (tntnam)M o ](PF 6 ) n and [M c '(tntnim)Ni](PF 6 ) n where M c = Co(III) and Zn(II), M c ' = Co(II), Co(III), and Zn(II), and M o = Ni(II), Cu(II), and Zn(II) have been synthesized and characterized. The macrocyclic ligands tntnim 2 and tntnam 3 contain…
The electrochemical behaviour of 254SMO stainless steel in phosphoric acid media, both with and without chloride ions, has been investigated and compared with that of 316L stainless steel and Hastelloy alloy C276. Open circuit potential measurements, potentiodyn amic polarisation curves, and SEM analyses were used in…
Control of the Dynamics of Photogenerated Carriers at the Boron‐Doped Diamond/Electrolyte Interface by Variation of the Surface Termination, Yagi, Ichizo, Tsunozaki, Kentaro, Tryk, Donald A., Fujishima, Akira
The onset and structure of compositional convection in a rotating system are investigated experimentally. A vertically oriented cylindrical annulus filled with NH 4 Cl‐H 2 O solution is cooled from the bottom and can be rotated about its axis at rates ranging up to 10.5 rad s −1 , corresponding to Ekman numbers down t…
We present explicit relations for the generalized dimensions of the spectral measure of the Thue-Morse symbolic sequence for positive integer values of q . Each is expressed through the eigenvalue of the corresponding matrix. It is also demonstrated how these dimensions can be recovered from the products of the values…
The replacement of fibroin heavy chain gene in silkworm by site directed homologous recombination was studied The DNA fragment consisting of an IE promoter driving green fluorescent protein (GFP) gene as reporter flanked by pieces of the 5' and 3' sequences of the fibroin heavy chain gene of silkworm at two sides was…
Polymer-clay nanocomposites are materials reinforced on a molecular scale by 1 nm-thick clay layers dispersed in a polymer matrix. Thermoset-clay nanocomposites were synthesised from unsaturated po ...
The Mooney-Rivlin equation was used to determine the degree of crosslinking of rubbers based on their stress-strain behaviour. Non-linear behaviour ofthe Mooney-Rivlin curve under valid elongation and changes in the crosslink density for swollen NR vulcanisates were observed, in contrast to unswollen vulcanisates. The…
Methyltrimethoxysilane (MTMOS) was used to prepare the SiO2 wood-inorganic composites. To enhance the properties of these composites, 2-heptadecafluorooctylethyltrimethoxysilane (HFOETMOS) as a property enhancer was added to this reaction system for SiO2 wood-inorganic composites. To elucidate the mechanism for enhanc…
Molecular dynamic simulations with quantum correction were performed on an alumina-magnesia system. First, interatomic potential parameters were determined empirically for alumina, magnesia and spinel so as to reproduce the lattice constants at 300K and higher temperatures. Then, the thermal expansivity, specific heat…
Dielectric, pyroelectric current and X-ray diffraction studies have been performed on a ceramic of composition Ba0.92Ca0.08(Ti0.75Zr0.25)O3 belonging to the BaTiO3–BaZrO3–CaTiO3 ternary diagram. A spontaneous classical ferroelectric–relaxor transition was evidenced at T = 210 K. Such behaviour has been reported previo…
Strained cis,cis,cis,trans-tribenzo[5.5.5.6]fenestranes are accessible in good yield by two-fold cyclodehydration of cis-2,6-diphenylspiro[cyclohexane-1,2′-indane]-1′,3′-diols and the particularly high acidity of their ‘inverted’ benzylic bridgehead C–H bonds, causing facile epimerization to the more stable all-cis-tr…
Voltage distribution along a semiconducting glaze insulator string was calculated based on an equivalent circuit. The impedance effect of the insulator unit on voltage and temperature distributions along the insulator string were also examined by calculation. The calculated results agreed well with experimental ones o…
The series of liquid crystalline 4-[(4′-decyloxybiphenyl-4-yl)oxycarbonyl]phthalimide alkane acid methyl esters has been synthesized and studied by DSC, polarized optical microscopy and X-ray diffraction methods. All compounds form a monolayer smectic A phase. It was found that 2-{4-[(4′-decyloxybiphenyl-4-yl)oxycarbo…
The effect of annealing at argon pressure, HP, up to 1.5 GPa on photoluminescence, PL, of oxygen-containing silicon (of Czochralski grown, Cz-Si, and of oxygen-implanted, Si:O) and of thermally — grown SiO2 films was investigated. Pressure-annealing of Cz-Si and Si:O at 720 to 1400 K affects the intensity of dislocati…
In this paper, a special lifetime testing apparatus is installed for dropwise condensation heat transfer on polymer-coated surfaces. Film and dropwise condensations are simultaneously carried out in the same condensing chamber to get rid of any containments. The discontinuous experimental results demonstrate that one…
A series of poly(amide–imide)s IIIa–m containing flexible isopropylidene and ether groups in the backbone were synthesized by the direct polycondensation of 4,4′-[1,4-phenylenebis(isopropylidene-1,4-phenyleneoxy)]dianiline (PIDA) with various bis(trimellitimide)s IIa–m in N-methyl-2-pyrrolidone (NMP) using triphenyl p…
Boron NMR and NQR studies have been performed on three icosahedral borides: - and -rhombohedral boron and boron carbide (B 12 C 3 ). Two 11 B NMR peaks, separated by significant chemical shifts in the range from 130 ppm to 280 ppm, were clearly observed for all of the icosahedral borides that were not enriched in the…