Materials Literature
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Presently, continuous-fiber ceramic composites (CFCCs) are considered leading candidate materials for many high-temperature applications, such as high-pressure heat exchangers, radiant burner tubes, and engine combustors. To adequately evaluate these materials in their cylindrical configurations, a hoop tension test i…
Aromatic hydrocarbon resins with different molecular weights (Mw = 1300-50400 daltons) were added to a solvent-based polychloroprene adhesive. The hydrocarbon resins were characterized using infra-red (IR) and differential scanning calorimetry (DSC) measurements. The properties and compatibility of the polychloroprene…
Abstract This work underlines the influence of alloying elements zinc and gallium on the electrochemical behaviour of aluminium alloys used as sacrificial anodes. Both the single and joint effects of these two elements on the free corrosion potential, the corrosion current density, and the development of the passive r…
The reaction of the bis(ylide) gold complex [Au 2 {µ-(CH 2 ) 2 PPh 2 } 2 ] with strong acids (such as HClO 4 ) in the presence of diphosphines L–L afforded a mixture of heterobridged gold(I) complexes [Au 2 {µ-(CH 2 ) 2 PPh 2 }(µ-L–L)] + (L–L = Ph 2 PCH 2 CH 2 PPh 2 or Ph 2 PCH 2 PPh 2 ) and [PPh 2 Me 2 ] + . After ad…
Abstract Ba 6 Pr 2 Fe 4 O 15 (I), Ba 5 SrPr 2 Fe 4 O 15 (II) und Ba 5 CaPr 2 Fe 4 O 15 (III) wurden mit Hochtemperatur‐CO 2 ‐LASER‐Technik dargestellt. (I)–(III) kristallisieren mit hexagonaler Symmetrie, Raumgruppe C –P6 3 mc, (I): a = 11.808(2), c = 7,036(4) Å; (II): a = 11.689(2), c = 6.954(2) Å; (III): a = 11.602(…
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SummaryA hydrophobic coating formulated with maltodextrins, carboxymethylcellulose, propyleneglycol and a mixture of sorbitan esters was applied to pre-climacteric ‘Manila’ mangoes. The coated fruit were stored for 20 d at 25°C and 80–85% r.h. Changes in mesocarp hardness, as well as pectinesterase (PE), polygalacturo…
Cost is one of the major factors to be considered when choosing a thermal insulator. Design engineers continuously strive to provide the best at the lowest possible cost. In the tropics climatic conditions are essentially hot and humid and a cause for daily discomfort. To some extent, air-conditioning of buildings has…
Abstract Retention gape deactivated with Silicone OV‐1701‐OH show good chromatographic performance and remarkable stability against water induced stationary phase degradrdation. In an attempt to better understand the findamentals off the deactivation process using silanol terminated polysiloxanes, a fumed silica was d…
Austempered ductile cast iron (ADI) has emerged as a major engineering material in recent years. In addition to high strength and relatively light weight (compared to steel), it has high ductility, good wear resistance and good damping capacity. It has many potential applications such as automotive components (e.g. cr…
The motion of domain boundaries in ferroelectrics and related materials is considered. The factors controlling their displacements are indicated: the lattice potential relief, the crystal lattice defects, the long-range electric and elastic fields arising through the bending and the translational displacements of doma…
${\mathrm{RFe}}_{10}$ ${\mathrm{Mo}}_{2}$ (R=Pr, Sm, Nd, Dy, Ho, Er, Tm) intermetallics were investigated by studying the temperature- or field-induced spin-reorientation transitions (SRT's). The temperature dependence of the magnetic anisotropy field was determined by means of the singular point-detection technique f…
Abstract Soil colour was expressed in terms of chromaticity coordinates instead of traditional Munsell notations which facilitated correlation with the moisture content of soils. Spectral reflectance of twenty‐one soil samples was measured in the visible region from saturation to air‐dryness from which the colour coor…
The formation of epitaxial lead-telluride films on a silicon substrate with a porous-silicon sublayer is investigated. In these structures vertical-type infrared photodiodes were produced using ion doping. Despite a great mismatch in the lattice constants and the temperature expansion coefficients between silicon and…
The crystal structures of [Fe(oep)L 2 ][O 3 SCF 3 ] and [Co(oep)L 2 ][ClO 4 ] [H 2 oep = 2,3,7,8,12,13,17,18-octaethylporphyrin, L = [Fe(C 5 H 5 )(C 4 H 4 N)] have been determined. The azaferrocene ligands L in both compounds are seen to be parallel. The axial M–N (azaferrocene) bonds are longer than those found in an…
Cluster models and the atom superposition and electron delocalization molecular orbital theory calculations lead to an explanation for the ability of nitrogen to cause phosphorous incorporation in low pressure grown diamond films as observed recently by Cao and coworkers. The theory shows that substitutional N compens…
Impedance spectra are obtained in H 2 /H 2 O on Ni/YSZ cermet anodes. These impedance spectra are fitted to the equivalent circuit LR(RQ) 1 (RQ) 2 (RC) 3 . The subcircuit (RC) 3 is found to have a capacitance in the order of 0.1-1.1F only when the current-bearing electrodes are in separate atmospheres. This impedance…
In order to clarify the phase transformation of Fe-15 mass%Cr-C-B alloys, we prepared nine kinds of the alloys with different carbon and boron contents. The phase transformation behavior was examined with thermal expansion test, hardness test and SEM observation. The results obtained are as follows.(1) The transformat…
SiC was bonded to SiC using Ta foils at temperatures from 1673 to 1773 K for 3.6∼144 ks in vacuum. The reaction phase and microstructure formed at the an interfaces between SiC and Ta were investigated. At the initial stage, an hexagonal Ta2C phase is formed at the Ta side of the reaction zone, and the hexagonal Ta5Si…
The influence of oxygen and humidity of inlet gas on the sintering reaction was studied through mathematical model analysis. Then, the change of oxygen and humidity of inlet gas was investigated for the effects on the sintering time, product yield of sinter, heat wave in sintering bed and other parameters in all of th…