Materials Literature
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Abstract The [4] Al/Si and [6] Al/Mg order-disorder behaviour of minerals in the tremolite-tschermakite solid solution (namely, end-member tschermakite and the 50:50 composition, magnesiohornblende) has been investigated by Monte Carlo simulation, using a model Hamiltonian in which atomic interaction parameters J i we…
Typically the grating problem is formulated for TE and TM polarizations by using, respectively, the electric and magnetic fields aligned with the grating wall and perpendicular to the plane of incidence, and this leads to a one-field-component problem. For some grating profiles such as metallic gratings with a triangu…
Preparation of niobium-aluminium (Nb-Al) alloys was investigated by open aluminothermic reduction of Nb 2 0 5 using lime based slags. The influence of various process variables such as (i) the amount of Al in the charge, (ii) slag composition, (iii) use of heat energiser (KCI0 3 + Al) etc. was studied to establish con…
Ken Sutherland considers the likelihood of a return to the expansion of nuclear fission as a major energy source and what this means for the filtration industry.
The rate theory of irradiation effects in crystalline solids rests on the balance between the production and the annihilation of defects. The annihilation takes place either by mutual recombination or by absorption on sinks. The absorption rate is a function of the sink strength, a factor mainly of geometrical origin…
Abstract Synthesis of the Li-Al-Fe layered double hydroxides was performed by the coprecipitation method at constant pH (11.0±0.2) and temperature (40±2°C). Structural features of the as-synthesized samples were investigated by X-ray diffraction (XRD), infrared (IR) spectroscopy, scanning electron microscopy and Mössb…
The microstructural modifications due to irradiation in hcp pure metals and their consequences on the mechanical properties have been investigated. Experimental results for proton-irradiated pure polycrystalline titanium are presented and discussed. Samples have been irradiated with 590 MeV protons to a low dose range…
Inceptisols (Cambisols) occupy a large and important part of the agricultural land in Jordan. Rainfed agriculture is practiced there and the soils are used for cultivated field crops. They have sustained agriculture for many decades. Relatively few pedogenic studies have been directed to Inceptisols (Cambisols) in Jor…
The reorientation of hydrides and its effect on the fracture of Zr—Nb—Sn—Fe cladding tubes were investigated. The reorientation of hydrides along the radial direction was most pronounced if the tube was cooled from 573 to 473 K under circumferential loading. Reorientation occurred much less frequently at either higher…
Prediction of Scale Inhibitor Squeeze and Return in Calcite-Bearing Formation A.T. Kan; A.T. Kan Rice University Search for other works by this author on: This Site Google Scholar G. Fu; G. Fu Rice University Search for other works by this author on: This Site Google Scholar M.B. Tomson M.B. Tomson Rice University Sea…
This study investigates the effect of course length and washing processes on the physical characteristics and shrinkage behavior of three-thread fleece fabrics. Three groups of fabrics in five different course length ranges are produced, and their areal density, fabric thickness, pilling, and abrasion resistance are m…
The inorganic molecule Ni(PF 3 ) 4 is a candidate as a Ni chemical vapor deposition (CVD) precursor, which is an alternative to organometal sources. We develop a new method of synthesizing Ni(PF 3 ) 4 from Cp 2 Ni and PF 3 with a high yield. Ni(PF 3 ) 4 is liquid at room temperature and has a vapor pressure (215 Torr…
Metal ion templating in a sol-gel synthesis is used to develop multiligand 8-hydroxyquinoline binding sites in porous silica structures. The acid-base equilibria and the metal ion binding equilibria and stoichiometry of these materials are investigated by in situ Raman spectroscopy. This technique is capable of resolv…
CaHPO 4 and SrHPO 4 were investigated using Raman, 1 H NMR and 31 P NMR techniques to study the environment of their PO 3− 4 tetrahedra and the percentage of mobile protons. 1 H NMR spectra at room temperature suggest the presence of three types of protons, in agreement with RX investigation. The percentage of mobile…
The crystal growth of ZnO by vapour transport is classically made in presence of additional species which enhance the growth process. Usually, additional species have been considered as chemical transport agents that promote a typical CVT (Chemical Vapour Transport) process. Recently, we have proposed a new interpreta…
Conventional testing of scale inhibitors (SI) usually focuses only on the inhibition of bulk depositional processes, e.g. in jar tests of inhibition efficiency. In previous work, we have extended the study of inhibition efficiency to examine both bulk and surface depositional processes and their inhibition using scale…
Abstract The synthesis, structural characterization and optical properties of a semiconducting zinc oxide based dodecylamine surfactant, mesolamellar zinc oxide/surfactant nanocomposite (Zn‐L) are described. XRD and TEM results showed the formation of a lamellar mesostructure with two layer spacings ca. 28 Å. A red‐sh…
The morphology and mechanical properties of uncrosslinked (PUR-unc) and hard segment crosslinked (PUR-c) segmented polyester-urethanes (PUR) obtained with DABCO catalyst were investigated. The crosslinking was introduced by using 60 wt. % of trimethylol propane (TMP) in the mixture with butanediol. The morphology of b…
Pyrolytic dehydrochlorination of the electrical cable insulation Hypalon was studied as a function of time and temperature. The chlorine evolution was determined separately by means of on-line activity measurements and by neutron activation analysis in the temperature range 200°C to 300°C, with one test conducted at 5…
The absorption and phosphorescence spectra of porphin and its complexes with internal (Mg, Zn) and external heavy atoms (Ne, AR, Kr, and Xe) are calculated by the B3LYP density functional method with the 3-21G basis set and taking into account the linear and quadratic responses. A reasonable agreement with experiment…