Materials Literature
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Abstract This study was carried out to investigate the feasibility of developing a continuous compounding process for wood‐fiber/thermoplastic composites using the Szego mill, a unique, high speed planetary ring‐roller grinding mill. Prior to compounding, air‐dried sawdust was ground to evaluate the grinding effect in…
We have successfully substituted 240 Pu 3+ for Ca 2+ in the calcium-binding protein calmodulin and used neutron resonance scattering from the bound 240 Pu to demonstrate that the Pu binds specifically to the Ca 2+ sites and also to measure the distance between the ion binding sites within individual domains of the pro…
This paper deals with ionising radiation effects (X or γ-rays) in ferroelectric materials for electronic non-volatile memories. After the recall of main observations, mechanisms are analysed and proposed to take into account the effects in PZT-based capacitors. Fatigue of the hysteresis cycle are studied and linked to…
Glass transition in supercooled Ga0.15Zn0.15Mg0.7 metallic liquid has been simulated by making use of a constant-pressure molecular dynamics technique via the pairwise interatomic potentials calculated from a self-consistent nonlocal model pseudopotential theory. The structures of liquids and glasses are analyzed thro…
Cobalt thin films were prepared by low-temperature atmospheric-pressure chemical vapor deposition from cobalt(II) acetylacetonate and cobalt(III) acetylacetonate. The resistivity was low ( 10–30 µ Ω·cm) and independent of film thickness, when the film thickness ranged from 150 to 700 nm. The thin films deposited from…
The first edition of Woolfson's An Introduction to X-ray Crystallography was published in 1970. It was a popular textbook for the senior undergraduate or graduate student beginning a serious study of x-ray crystallography. It was exactly what it claimed to be, a sound and uncompromising introduction for those intendin…
Several polypropene samples, synthesized with different catalytic systems based on TiCl4 supported on activated MgCl2 and different electron donors, were studied using both preparative and analytical temperature-rising elution fractionation (TREF). The experimental results show that each variation in the catalytic sys…
The fatigue crack growth resistance of α–β titanium alloys can be altered by microstructural modification. During welding, the fusion zone microstructure depends on cooling rate. In the present work, the alloy Ti-6Al-4V was welded over a range of heat inputs, using electron beam and gas tungsten arc welding. The weld…
The electronic states of indium oxide are calculated by a molecular orbital method. The conduction band consists mainly of oxygen 2 p and indium 5 p . The valence band consists of O-2 p . When there is an oxygen vacancy in the indium oxide, a localized orbital appears at the indium site near the oxygen vacancy, which…
The crystal structure of trans-diaquabis(methoxyacetato)copper(II), C(6)H(14)O(8)Cu, has been determined by neutron diffraction at 4.2 K (monoclinic, P2(1)/n, a = 6.88(1), b = 7.19(1), c = 9.77(2) Å, gamma = 95.7(1) degrees, (Z = 2)) and by X-ray diffraction at 125, 165, 205, 240, 265, 295, and 325 K. These measuremen…
An atomistic step of growth to a faulted loop, a stacking fault tetrahedron (sft) and a void by clustering of vacancies in fcc metals was studied by molecular dynamics computer simulation with an isotropic EAM potential due to Daw and Baskes [1]. In aluminum, a tri-vacancy relaxes to the Damask-Dienes-Weizer structure…
Abstract Volatile organic compounds and organochlorine species liberated by UV exposure of poly(vinyl chloride) (PVC) siding samples have been identified and preliminary quantification made. These volatiles included those remaining in a PVC sample after weathering or laboratory UV exposure and which could be released…
Instantaneous normal modes (INM) are the harmonic approximation to liquid dynamics. This is an extension of the phonon description of lattice dynamics, in which case Bloch's theorem shows that all modes are extended. Long-range order is destroyed in liquids and glasses, and the INM spectrum has contributions from both…
Three established methods for deriving the surface energetic parameters for calcite were studied. These are based on the contact angle in air using various wetting liquids, and submerged systems in water and in alkanes. Two variations of these methods that require less elaborate experimental procedures were also explo…
Summary The hardening of soils containing little clay content has often been related to the cementing of skeleton grains. In sandy‐loam soils from the southern plain of the Chad basin the skeleton grains of the hard horizon are coated and bonded by wall‐shaped bridges. We have studied the bonding agent by X‐ray diffra…
The martensitic - austenitic phase transformation of a polycrystalline shape memory alloys (SMA) occurs gradually over a range of temperatures even though the monocrystal undergoes a first-order transition (at a single temperature). Factors such as material inhomogeneities and internal stresses in a polycrystal are be…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTEffects of the Sequence Distribution of Poly(acrylonitrile−butadiene) Copolymers on the Surface Chemical Composition As Determined by XPS and Dynamic Contact Angle MeasurementsLin Li, Chi-Ming Chan, and Lu Tao WengView Author Inform…
The oxidation of phosphorus by sulfur at low temperatures (<100 °C) has been shown to produce complex mixtures that include 12 of the 17 known binary phosphorus sulfides. Two of these 17 sulfides have been observed in these mixtures for the first time. The rate-determining and first step in the reaction appears to be…
A benchmark study on several closed-form solutions for the mean crushing strength and the cutting resistance of plated structures during collision or grounding is carried out by comparing theoretical solutions with experimental data. Based on expressions which have been derived for unstiffened structures, an extension…
The effect of annealing on the permeation of oxygen, nitrogen, and carbon dioxide through coextruded linear low-density polyethylene (LLDPE) films is studied. The results indicate that the permeability coefficient P of nitrogen does not show a definite dependence on the time of annealing, t a, whereas for the other ga…