Materials Literature
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Abstract Specific surface area is an important property for carbon black grade classification, production control, and prediction of rubber reinforcement characteristics. Total surface area alone is insufficient for estimating the reinforcing properties of a microporous carbon black because the internal area of the mi…
The fracture behavior of synthetic diamond has been investigated using indentation methods and by the tensile testing of pre-notched fracture-mechanics type samples. Specifically, the fracture toughness of free-standing diamond plates, grown by chemically-vapor deposited (CVD) methods, was measured using Vickers inden…
Transparent glass ceramics containing β-PbF2:Tm3+ crystallites have been prepared by heat treatment of glasses in GeO2-PbO-PbF2-TmF3 system. Average crystallite size of β-PbF2 evaluated from the full width at half maximum of x-ray diffraction lines varies from about 16 to 20 nm as the heat treatment temperature increa…
The present work examines the inertial effects on void growth in viscoplastic materials which have been largely neglected in analyses of dynamic crack growth and spallation phenomena using existing continuum porous material models. The dynamic void growth in porous materials is investigated by analyzing the finite def…
Reactions of solids exposed to non-isothermal heating reveal diverse isokinetic relationships (IKR). Some of these effects are exclusively inherent to non-isothermal reactions of solids. The present paper briefly surveys the most commonly encountered IKRs, classifying them into two main types: ‘false’ and ‘true’. The…
Raman spectroscopy has been used to investigate the effects of dynamic and postimplantation annealing on glassy carbon implanted with 50 keV C ions to a dose of 5×1016 ions/cm2. The postimplantation annealing of damage in the ion-beam modified material was found to occur in two stages as a function of postimplantation…
Fabrication methods and property characterization of polyglycolic acid (PGA), polylactic acid (PLA), and their copolymers are reviewed. Both of these aliphatic polyesters belong to the a-hydroxy group and biodegrade in a physiological environment to monomeric acids, which are readily processed and excreted from the bo…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCrystalline-Amorphous Phase Transition of Poly(ethylene Glycol)/Cellulose BlendXue-Hai Liang, Yuan-Qiang Guo, Lian-Zhen Gu, and En-Yong DingCite this: Macromolecules 1995, 28, 19, 6551–6555Publication Date (Print):September 1, 1995Publication History Published online1 May 20…
Cyclic fatigue‐crack propagation behavior in monolithic silicon nitride is characterized in light of current fatiguecrack growth models for ceramics toughened by grainbridging mechanisms, with specific emphasis on the role of load ratio. Such models are based on diminished cracktip shielding in the crack wake under cy…
Abstract Recently, the mechanism of shear induced crystallization in melts of isotactic industrial polypropylene has been unravelled for sufficiently high rates of shear [1]. This was achieved with the aid of, what we called, short term shearing. This shearing was applied in a rectangular duct of large aspect ratio. T…
The mineralogy, geochemistry and geotechnical properties of clay samples in Ariake Bay, Japan are presented. The mineralogy and geochemistry are discussed in terms of depositional and post-depositional processes, and the correlations of the clay mineralogy and geochemistry with the geotechnical properties were examine…
An intermediate reaction in the synthesis of ZrB 2 powder by the reduction of ZrO 2 with B 4 C and carbon was confirmed through both thermodynamical calculation and experimental results. Because the intermediate product B 2 O 3 was volatile, excess boron should be added to compensate for the boron loss in order to pre…
Stokesian dynamics computer simulations were performed on monolayers of equally sized spheres. The influence of repulsive and attractive forces on the rheological behavior and on the microstructure were studied. Under specific conditions shear thickening could be observed in the simulations, usually together with a ch…
Amorphous boron carbide (a-B1−xCx) is believed to have an icosahedron-based random network. In this paper, vibrational properties of a-B1−xCx films are studied by IR and Raman spectra, placing particular emphasis on the interpretation of the most prominent 1100-cm−1 band associated with the B–C bond. The 1100-cm−1 ban…
The Curie point ( T C ) of BaTiO 3 was earlier reported to be 120° C and has been recently believed to be 130° C. Some experiments have been performed here to reconfirm the T C . Firing conditions used for preparing BaTiO 3 were examined first with the use of pure BaCO 3 or Ba(NO 3 ) 2 and TiO 2 . The x -dependence of…
Abstract In this study, the viscoelastic behavior of a microcellular plastic was investigated with particular emphasis on the effect of cell size. A poly(ethylene terephthalate) resin containing a polyolefin nucleating agent (CPET) was selected as the test material. In order to investigate the effect of cell size, mic…
The atomic structure of the interphase boundary enclosing an α (hcp) precipitate formed from the β (bcc) matrix in a Ti-Cr alloy was examined. All the interfaces of an α lath exhibit continuity of atomic planes between the matrix and the precipitate and thus are considered to be coherent or semicoherent. Such observat…
Over the past several years, numerous relationships between fiber properties and yarn performance have been developed. The classical method for predicting yam performance is statistical analysis such as linear multiple regression. Neural networks are now a subject of interest in many fields and a tool for many areas o…
The kinetics and mechanism of reaction of glassy carbon with a pure silicon melt or a Si + Mo melt were investigated. The results showed that the growth of a continuous reaction‐formed SiC layer followed a fourth‐power rate law in the temperature range of 1430° to 1510°C. A model that could explain the fourth‐power ra…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSilica-Supported Zirconia. 1. Characterization by Infrared Spectroscopy, Temperature-Programmed Desorption, and X-ray DiffractionZ. Dang, B. G. Anderson, Y. Amenomiya, and B. A. MorrowCite this: J. Phys. Chem. 1995, 99, 39, 14437–14443Publication Date (Print):September 1, 19…