Materials Literature
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The variations, with humidity, of the positive DC corona-current voltage characteristics and of sparkover stresses have been studied in rod-plane gaps of spacings in the range 10≤d≤150 cm. The steady component of the current in the glow regime is described by the square law equation over the whole range of gaps, requi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis of poly(2-oxazoline) macromonomers having a vinyl ester groupHiroshi Uyama and Shiro KobayashiCite this: Macromolecules 1991, 24, 2, 614–615Publication Date (Print):January 1, 1991Publication History Published online1 May 2002Published inissue 1 January 1991https:/…
The cold rolling effect of β single-phase on α precipitation behavior and the mechanical properties were studied using a Ti-15V-3Cr-3Sn-3Al metastable β alloy. The β single-phase material was prepared by heating the alloys above the β transus temperature followed by quenching in water, and subsequent aging at the (α+β…
The luminescences of GaBO3 and LiGaO2 are reported. The former has GaIII in octahedral sites (calcite structure), the latter in tetrahedral sites (ordered wurtzite structure). The GaIII co-ordination number has the same influence on the luminescence as in the case of oxo-d0 complexes: the lower the co-ordination numbe…
Conducting poly(benzo[c]thiophene) thin films may be prepared by photopolymerization of the monomer, benzo[c]thiophene.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructural systematics. 2. Metal framework rearrangements in cluster compounds containing the Au2Ru3 fragmentA. Guy Orpen and Ian D. SalterCite this: Organometallics 1991, 10, 1, 111–117Publication Date (Print):January 1, 1991Publication History Published online1 May 2002Pub…
The wetting of graphite by aluminium and Al–Si alloys was studied at 1273 K in a purified He-3 vol%H2 atmosphere with a Meniscograph to establish the usefulness of this method in metal/ceramics systems.Wetting showed three characteristic phases with the change in adhesive tension (Fa). These are, (1) an initial phase…
The bacterial strains belonging to the genus Saprospira were isolated from sea water samples in Kagoshima Bay and shrimp aquaculture ponds by using of the mixed culture with marine diatoms and double layer agar techniques. A Saprospira strain SS90-1 formed crater-like plaques on a lawn of Chaetoceros ceratosporum, whi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOrganometallic chemistry of porphyrins: spectroscopic and chemical characterization of a rhodium porphyrin-ethyl diazoacetate adductJana Maxwell and Thomas KodadekCite this: Organometallics 1991, 10, 1, 4–6Publication Date (Print):January 1, 1991Publication History Published…
Cavitation corrosion was induced on nodular cast iron used as marine globe valves by means of a 20 kHz ultrasonic vibrator at an amplitude of 25 μm. The rate of weight loss in natural sea water was determined for cavitated specimens under free corrosion and cathodic protection conditions as well as in the quiescent co…
Tensile and impact properties of wood flour filled isotactic polypropylene composites are studied at 0–70 wt% filler levels. Tensile modulus showed an increase whereas tensile strength and breaking elongation decreased with increasing filler content. Restriction in molecular mobility or deformation of polypropylene by…
The structure of B6O has been determined by the Rietveld analysis of X‐ray powder diffraction data. The sample material was prepared by oxidation of amorphous boron with ZnO at 1350 °C in an argon atmosphere. The structure [Space group, R3̄m; ahex.=5.374(2) Å, chex.=12.331 (3) Å], is of the α‐rhombohedral boron struct…
The ferroresonance phenomenon shows at least two different steady states for the same applied voltage, depending on initial conditions. The Galerkin method is well suited for computing periodic steady states, but often shows difficulties in terms of initialization or convergence. To overcome these difficulties, a cont…
The effect of surface modification of various wood fibers [e.g. woodflour and chemithermomechanical pulp (CTMP) of hardwood aspen, and woodflour of softwood spruce] by precoating with only maleic anhydride (MA) and/or poly[methylene (polyphenyl isocyanate)] (PMPPIC) in the presence of benzoyl peroxide (BPO) on the mec…
The complex [Pd2(dppm)2(CN)4][dppm = bis(diphenylphosphino)methane] displays an intense absorption band at 272 nm (εmax= 5.2 × 104 dm3 mol–1 cm–1) attributed to the dσ*→ pσ transition. Crystals of the complex are monoclinic, space group P21/n(no. 14, non-standard) with a= 11.476(2), b= 17.565(2), c= 13.964(2)Å, β= 95…
Interdiffusion coefficients in the β phase of Ti–Cr and Ti–Pd alloys have been determined by Matano’s method in the temperature range between 1173 and 1823 K with (pure Ti)–(Ti-4.62 at% Cr alloy) and (pure Ti)–(Ti-1.84 at% Pd alloy) couples. The impurity diffusion coefficients of Cr and Pd in β-Ti have been determined…
The crystalline-amorphous transformation of the intermetallic precipitates Zr(Cr,Fe)2 and Zr2(Ni,Fe) in Zircaloy under charged-particle and neutron irradiation is studied. In the first section, the experimental results in the literature are reviewed for the three types of irradiation: neutron, electron, and ion. It is…
Rapidly solidified and annealed structures were examined in a series of Al70Pd20TM10 (TM=transition metal) and Al70Pd20TM15TM25 alloys, based on the fact that an Al70Pd20Mn10 alloy consists of a stable icosahedral (I) phase. As a result, new stable I alloys were found in Al70Pd20Cr5Fe5, Al70Pd20V5Co5, Al70Pd20Mo5Ru5 a…
The molecular structure of polyethylene and its copolymers is discussed, with particular attention to its effect on thermal and mechanical properties. The synthesis of polymers of various densities and of the copolymers is examined. The effects of changes in average molecular weight and of molecular weight distributio…
Three kinetic ranges are defined for the photoetching of semiconductors. In these ranges, either the light intensity, the reduction rate of the oxidizing agent, or the solubility or removal of semiconductor oxidation products is rate limiting. The discussion of photoetching kinetics includes the dependence of the etch…