Materials Literature
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Individuals living near the Nevada Test Site were exposed to both beta and gamma radiations from fission products and activation products resulting from the atmospheric testing of nuclear devices. These exposures, and the resultant doses, were functions of the amount of material deposited, the time of arrival of the d…
Increased usage of thermoplastic materials in electronic apparatus has accentuated electromagnetic interference (EMI) problems. Methods for providing shielding by metallizing the thermoplastics using electroconductive paints and electroconductive thermoplastic molding compounds are examined, following a review of the…
The speed of motion has been studied for the first time in more than 110 raphid species, sampled in their natural environment and representing about 25 % of fresh water species from the west of France. First, five species were chosen belonging to 5 different genera in order to test the general conditions governing acc…
The opening behavior of lockstitch seams (seam type 1.01.01, SSa-1, stitch type 301 ) under cyclic loading conditions has been analyzed, using models of the slippage of yarns in the fabric and the deformation of the stitch itself. The extension properties of the sewing thread under constant cyclic loading conditions w…
Novel liquid crystalline 1,3-disubstituted cyclopentanes were studied for physicochemical and temperature characteristics.
Abstract We have used XPS to examine some model catalysts obtained by vapour deposition of Ni, Pd and Pt on an α‐alumina single‐crystal. It is shown that the binding energies of the substrate core levels with respect to the metal Fermi level depend on the metal work function. This is due to the fact that the common re…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe synthesis and characterization of magnetic iron-modified polyimide filmsJ. J. Bergmeister, J. D. Rancourt, and L. T. TaylorCite this: Chem. Mater. 1990, 2, 6, 640–641Publication Date (Print):November 1, 1990Publication History Published online1 May 2002Published inissue…
An algorithm is presented for computationally drafting patterns from three-dimen sional data, in which the fabric is everywhere in contact with the underlying surface. The algorithm is based on an earlier theoretical framework, which models draping a garment as a two-step process. In this part, a functional relationsh…
Composites containing 30 vol%β‐Si 3 N 4 whiskers in a Si 3 N 4 matrix were fabricated by hot‐pressing. The composites exhibited fracture toughness values between 7.6 and 8.6 MPa · m 1/2 , compared to 4.0 MPa · m 1/2 for unreinforced polycrystalline Si 3 N 4 . The improvements in fracture toughness were attributed to c…
The dielectric peaks observed at the phase transition between an incommensurate- and a commensurate-ferroelectric phase have usually been explained in terms of a soliton-regime model of the incommensurate phase. However, in the case of [N(${\mathrm{CH}}_{3}$${)}_{4}$${]}_{2}$X${\mathrm{Cl}}_{4}$ (X=Co, Zn), recent obs…
Side-chain liquid crystal polyacrylates and polysiloxanes containing different photochromic spironaphthoxazine side groups were synthesized. Thermodynamic, spectral and kinetic properties of the polymers were investigated. The structure of the mesophase is discussed.
This volume gathers the contributions of six world experts to a course on combustion modelling. Therefore, a pedagogical effort has been made in writing up these texts, which cover state of the art advances in most aspects of combustion science. The book is aimed at students, researches and engineers, as was the cours…
Abstract An isoporphyrin prepared by the action of dibenzoyl peroxide on 5,10,15,20-tetraphenylporphinatozinc(II) (ZnTPP) shows absorption bands in the near-infrared region, is photolyzed to afford ZnTPP, and is facilely reduced by amines to ZnTPP.
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A phenomenological free‐energy function including the effects of elastic boundary conditions was presented and used to investigate the single‐domain, single‐crystal properties of the ferroelectric perovskite, PbTiO 3 . In particular, the effects of tensile and compressive hydrostatic stress on the spontaneous polariza…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe quinone diimine part of polyaniline is electrochemically inactive in nonaqueous electrolyteF. Ueda, K. Mukai, I. Harada, T. Nakajima, and T. KawagoeCite this: Macromolecules 1990, 23, 23, 4925–4928Publication Date (Print):November 1, 1990Publication History Published onl…
Abstract Monodisperse methyl methacrylate grafted latex rubber ( MMA ‐ g ) particles (0.12‐0.13 µm) have been used for the impact toughening of a series of styrene‐acrylonitrile ( SAN ) copolymers of varied AN content. It was found that the MMA ‐ g particles are most effective in toughening SANs containing about 25 to…
We formulate a computationally simple model for crystal growth, employing a lattice of coupled maps. This model allows us to study kinetic roughening and its effect on the surface tension. We demonstrate that the cusp in the Wulff plot, which via the usual construction gives rise to faceted crystals, disappears at suf…
The core structure of ⅓〈1 123〉 dislocations on {1011} planes in h.c.p. crystals has been studied by computer simulation using a truncated Lennard-Jones potential. An edge dislocation and a mixed dislocation parallel to the [2113] direction (30°dislocation) extend over the (1011) plane. A mixed dislocation parallel to…
ZrO 2 /Al 2 O 3 composites with from 0% to 100% Al 2 O 3 content were diffusion bonded at 12.5 MPa for 30 min in the temperature range 1450° to 1500°C. Under appropriate bonding conditions, a bonding strength greater than 1000 MPa was achievable between dissimilar materials with different thermal expansion coefficient…