Materials Literature
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Abstract In this paper a crystallographic framework and methodology are presented that enable the derivation of the symmetry of any bicrystal comprising a planar interface between two crystals of the same or different form. If the crystals are different the interface is an interphase boundary, and if they are the same…
Surface-plasmon-polariton-mediated luminescence is observed when electrons are injected into thin Al films from the conduction band of Si${\mathrm{O}}_{2}$. These electron-injector structures are strikingly similar to light-emitting tunnel junctions, although tunneling can be ruled out as the driving mechanism. The em…
The interaction between 1,4‐β‐D‐glucan‐cellobiohydrolase I (CBHI) from Trichoderma reesei and microcrystalline cellulose from Vallonia macrophysa was investigated by electron microscopy which allows to visualize the individual enzymes and their strong adsorption at the substrate surface. The microcrystals are slowly d…
Nonlinear electrical conductivity associated with a large noise voltage has been observed in the semiconducting charge-density-wave state of the blue bronze ${\mathrm{K}}_{0.30}$Mo${\mathrm{O}}_{3}$. A well defined and strongly temperature-dependent threshold field for the onset of the nonlinear conductivity is found.…
The existence of a new kind of electron state in graphite and in alkali graphite intercalation compounds is predicted with use of self-consistent local-density all-electron theory. These interlayer states, which exhibit free-electron character parallel to the layers, form a band close to the Fermi energy and provide f…
Article Veränderungen in Eigenschaften und Bruchverhalten von Wolfram- Schwermetallen während der Flüssigphasensinterung was published on March 1, 1983 in the journal International Journal of Materials Research (volume 74, issue 3).
Abstract Photocrosslinkable polymer is prepared from amorphous poly(methyl vinyl ketone) (A‐PMVK) obtained by anionic polymerization of methyl vinyl ketone. The reaction of A‐PMVK with cinnamoyl chloride proceeds in pyridine at 50°C. The photosensitivity of the polymer obtained is measured by infrared and Ultraviolet…
Abstract Energy transfer between fluorescent organic pigments (fluorophors) dispersed in a paint vehicle was studied for mixtures of a yellow, a red, and an orange fluorescent pigment, and for mixtures of these with titanium dioxide. Radiative energy transfer occurs among the fluorophors, but not between them and tita…
Abstract We have found that silicone rubber compounds undergo a reduction in effective chain concentration when heated in an environment of high temperature silicone oil and that this rate of reduction is dependent upon the effective chain concentration to the 3/2 power. The 3/2 power relationship results from a slowe…
Summary A high‐resolution 500 kV study of the long‐period ( n = 8) perovskite Bi 9 Ti 3 Fe 5 O 27 has revealed a variety of order/disorder effects, in marked contrast to low‐ n materials, as well as the occurrence of a new two‐dimensional superlattice structure corresponding to a 3 × d 110 ordering along the bismuthat…
The sulfate heptahydrates $M\mathrm{S}{\mathrm{O}}_{4}\ifmmode\cdot\else\textperiodcentered\fi{}7{\mathrm{H}}_{2}\mathrm{O}$ crystallize in two different structures: the monoclinic melanterite ($M=\mathrm{F}\mathrm{e},\mathrm{C}\mathrm{o},\mathrm{C}\mathrm{u},\mathrm{C}\mathrm{r}$) and the orthorhombic epsomite ($M=\m…
An optical fiber operating in the mid-infrared wavelength range is fabricated using ZrF4-based fluoride glass. Material purification, the fiber fabrication process, and transmission properties are presented. The starting materials, ZrF4, BaF2, GdF3, AlF3, and SbF3are carefully purified by sublimation techniques. The "…
The Bi–In system has been redetermined mainly using thermal analysis, but supplemented as appropriate by metallographic and X-ray examination. It is confirmed that the system contains four compounds: BiIn, Bi3In5, BiIn2, and an ɛ phase at approximately 90 at.-%In. Bi and BiIn form a eutectic at 46·8 at.-%In and 109·7°…
Abstract An attempt is made to investigate the effects of varying the orientation of a quantizing magnetic field on the effective mass in tetragonal semiconductors. It is found, taking n‐Cd 3 As 2 as an example, that the crystal‐field splitting results in different effective masses at the Fermi level corresponding to…
Abstract The fluorescent states of tetratolylporphyrin and its zinc complex in acetone were quenched by various kinds of quinones. The transient effect for the collisional quenching caused the upward deviation of the plots of the inversed fluorescence intensities of the porphyrins vs the quinone concentrations. A char…
Results of immersion pitting, immersion crevice, and slow scan potentiodynamic pitting tests are compared to assess the relevance of particular types of accelerated laboratory tests for localized corrosion. The alloys examined include 317 L, 20-type alloys, duplex stainless steels, and nickel-base alloys. The solution…
The synthesis, solubility enhancement, and phase-transfer catalysis properties of cyclic poly(alkyleneoxy)silanes (silacrowns) I [R = R1 = Me; R = Me, R1 = Et, Ph, CH2:CH, MeO, H2NCH2CH2NH(CH2)3; n = 3-6] are described. Solubility enhancements of Li, Na, and K ions are a function of macrocycle and ion size. Phase-tran…
Abstract Weathering products of a serpentinized Iherzolite were investigated using optical microscopy, X-ray diffraction, infrared spectroscopy, and electron microprobe and wet-chemical analysis methods. The original mineral assemblage of the rock was chrysotile-enstatite-diopside-picotite-magnetite-calcite. Rock poro…
Treated cotton batting is examined as a substrate for cotton upholstered furniture. Evaluation of the smoldering hazard includes the tests proposed by UFAC and NBS, together with smoldering rates and surface temperature profiles obtained using the SRRC Rate Chamber. The influence of washing on the smoldering behavior…
CW laser fields are strong enough to induce a large refractive index change in a liquid crystal. Optical-field-induced structural transition can occur. The large optical nonlinearity can lead to some unusual highly nonlinear optical phenomena.