Materials Literature
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Adhesion studies on spherical particles imbedded in elastomers have shown that cohesive failure of the binder phase always precedes dewetting. The latter is a sudden and irreversible process resulting in permanent damage to the system. Cohesive failure manifests itself in the formation of a number of small holes near…
The spatial distribution of magnetic moment disturbance around fifteen different transition metal impurities in iron (Ti, V, Cr, Mn, Co, Ni, Mo, Ru, Rh, Pd, W, Re, Os, Ir and Pt) and around four such impurities in nickel (V, Cr, Mn and Fe) has been investigated. A neutron scattering technique was employed that gives i…
A description is given of investigations concerning the participation of ammonium nitrate in the formation of HMX and RDX by the nitrolysis of hexamethylene tetramine.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRaman Spectra of Crystalline ChlorothallatesThomas G. SpiroCite this: Inorg. Chem. 1965, 4, 9, 1290–1293Publication Date (Print):September 1, 1965Publication History Published online1 May 2002Published inissue 1 September 1965https://pubs.acs.org/doi/10.1021/ic50031a013https…
Abstract This paper contains a description of the use of gas chromatography to examine the pyrolytic degradation of epoxide resins. The method depends on the pyrolysis of the material by use of an electrically heated filament, the difficulties of the method are examined and attempts to overcome them are described. The…
Common failure modes of aluminum electrolytic capacitors are due to chemical reactions between electrodes and electrolyte. From capacitance and weight change data and electron micrographs it is proposed that the attack of anode foil is primarily dissolution of oxide dielectric; that of cathode foil involves metal diss…
Anodic polarization behavior of annealed high-purity Ni, Cr and selected Ni-Cr alloys in hydrogen-saturated, 1, 5, 10 and 20N sulfuric acid solutions was investigated at 25 ± 1 C (77 F) using a potentiostatic technique. All specimens except pure Ni in 20N acid had an active-to-passive transition. Decreasing acid conce…
A quantitative survey has been carried out of the sizes and densities of the defects found by transmission electron microscopy of irradiated graphite crystals. Three regimes are considered, viz. isothermal irradiations between 150° and 1200°c, seeding irradiations in which the crystals have been given a short pre-irra…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSpectra of Molecular Complexes of Porphyrins in Aqueous Solution*D. MauzerallCite this: Biochemistry 1965, 4, 9, 1801–1810Publication Date (Print):September 1, 1965Publication History Published online1 May 2002Published inissue 1 September 1965https://pubs.acs.org/doi/10.102…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotochromic Chelating AgentsJ. P. Phillips, A. Mueller, and F. PrzystalCite this: J. Am. Chem. Soc. 1965, 87, 17, 4020Publication Date (Print):September 1, 1965Publication History Published online1 May 2002Published inissue 1 September 1965https://pubs.acs.org/doi/10.1021/j…
The development of forsterite, Mg2SiO4, by solid state reaction in mixed powders of MgO and SiO2 in various mole ratios at temperatures 1100–1400°c and for times up to 144 hrs is followed by quantitative x-ray diffraction measurements. Powders are used consisting of coarse (15 μ) particles of one component in a fine-g…
Abstract An explanation of the anomalous fractional values of the Avrami exponent found for the crystallization of a number of polymers is presented. The interpretation is based on a model which postulates the constant radial growth of spherulites, followed by an increase in crystallinity within them by a first order…
The oxidation kinetics were determined for single‐crystal SrTiO 3 by measuring the time and temperature dependence of the weight gain of reduced crystals. The oxidation can be described as a diffusion‐controlled process. The calculated diffusion coefficients between 850° and 1460°C are represented by D = 0.33 exp (‐22…
Magnesium single crystals were deformed at room temperature. Dislocation distributions were determined by transmission electron microscopy of sections of crystals deformed by various amounts. In stage A the dislocations are mainly in the form of edge dipole bands. No dislocations with non-basal Burgers vectors were fo…