Materials Literature
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Quaternary and ternary interdiffusion experiments of 7000 aluminum alloys have been performed at 725 and 755 K. The concentration profiles indicate that the diffusion distance of Cu is shorter than those of Zn and Mg in the solid solutions. The direct interdiffusion coefficients \\ ildeDZnZnAl, \\ ildeDMgMgAl are posi…
The purpose of this paper is to present a new constitutive equation (CE) based on the experimental results obtained by the author on different carbon steels and those available in the open literature on carbon steels, niobium ant titanium at different temperatures (−200 to 300 °C) and strain rates (10−4 to 5000 s−1),…
Extending Squeeze Lifetimes Using Miscible Displacement I.R. Collins; I.R. Collins BP Exploration Operating Company Search for other works by this author on: This Site Google Scholar J.A. Hewartson J.A. Hewartson BP Exploration Operating Company Search for other works by this author on: This Site Google Scholar Paper…
Contrary to natural fragmentation, controlled fragmentation offers the possibility to adapt fragment parameters like size and mass to the performance requirements in a very flexible way. Known mechanisms like grooves inside the casing, weaken the structure. This is, however, excluded for applications with high acceler…
In this study, two materials treated with a flame retardant were examined for their fire resistance. The first, MDF (medium density fiberboard) was overlaid by an oak sliced veneer, which was either treated by soaking in a 6wt.% solution of flame retardant chemicals (pentabromine-chlorinated paraffin) or non-treated a…
Influence of B on the selective surface oxidation behavior of Mn during recrystallization annealing was investigated by glow discharged spectroscopy, secondary electron microscopy and auger electron spectroscopy, on the 0.4mass% Mn added ultra low carbon steel.It is well known that both Mn and B are segregated on the…
SUMMARYZinc electrodeposits are widely used to protect iron and steel from corrosion. Zinc coatings are presently obtained from chloride and non-cyanide alkaline baths. Environmental corrosion along with the electrolyte's sensitivity towards metallic impurities limit the use of the chloride electrolyte. The use of bri…
A core of concentric nanotubes could oscillate at gigahertz frequencies–faster than any other mechanical oscillator.
As the dimensions of semiconducting devices continue to shrink, microelectronic devices are becoming increasingly sensitive to micro-contamination on wafer surfaces. This investigation analyzes the particulate morphology, elemental composition and the particle sizes of wafer contaminants in the lithographic process ar…
The associations of the water-soluble cationic copper(II)-5,10,15,20-meso-tetrakis(4-N-methylpyridyl) porphyrin (CuP) with d(pT)9 oligothymidylate and its building blocks deoxythymidine (dT) and deoxythymidine 5'-monophosphate (dTMP) were investigated by spectrophotometric titration [absorption, nanosecond transient r…
The temperature dependences of the nuclear-electric-quadrupole frequency ωQ of 117In and 111Cd doped in ferroelectrics LiTaO3, Li1−xInx⁄3TaO3 with x=0.2, and Li1−xCdx⁄2TaO3 with x=0.167, measured by the perturbed-angular-correlation technique, indicate that In behaves like Li; further, in a certain temperature range a…
Differences of high energy-ion induced microstructure of bcc δ-ferrite and fcc austenite matrix, and the effects of δ-ferrite on the Vickers micro-hardness (Hv) after irradiation were investigated for Type 304 stainless steel weldments containing two different δ-ferrite contents: ferrite number (FN) 5.5 and 8.5, respe…
Polyisocyanurate (polyiso) foam insulation with impermeable facers is known for its superior insulating properties in building envelope applications. The impermeable facer on both sides of polyiso foam insulation board is designed to increase and maintain the long-term thermal resistance (LTTR) of the insulation. Curr…
When L-ornithin-aspartate was crystallized by drowning-out method in a turbulent agitated semi-batch reactor, the effects of the crystallization conditions, such as the feed concentration, alcohol flow rate, and agitation speed, on the agglomeration and breakage of the L-ornithine-aspartate particles were investigated…
Isothermal decomposition of un-irradiated and pre- n -irradiated dysprosium acetate [Dy(CH3COO)3] has been investigated at different temperatures between 603-623 v K. Irradiation was observed to enhance the rate of decomposition without modifying the mechanism of the thermal decomposition. Thermal decomposition of dys…
Preparation of three new mixed-valence oxo-centered trinuclear manganese complexes [Mn3O(O2CR)6L3] (R=4-Cl-C6H4OCH2, 1, 3-Cl-C6H5, 2, BrCH2, 3; L=3-methylpyridine or water), by reaction of N-n-Bu4MnO4 with appropriate reagents in ethanol and 3-methelpyridine is reported. The crystal structure of 1 has shown to have an…
Macroscopically homogeneous and uniform coatings of polyaniline, polypyrrole and their blend were successfully deposited on carbon fibers by aqueous electropolymerization technique. Electrochemical polymerization of aniline and pyrrole blend with p-toluene sulfonic acid as the electrolyte was carried out by cyclic vol…
This review was prepared for presentation at the 13th Canadian Materials Science Conference held June 5 to 8, 2001 in Sudbury, Ontario – the heart of nickel production in Canada. Nickel has a wide application in structural and special purpose alloys such as stainless steels, superalloys and low alloy steels. The wide…
The first-order Raman spectra of CdWO4 crystal are measured at room temperature. The phonon disper-sion curves of CdWO4 are calculated on the basis of a rigid-ion model using the measured frequency values. The first-order Raman spectra of external Ag mode (310cm-1 and 550cm-1) in the CdWO4 crystal have been measured i…
We have synthesized new electron donors in which one or two TEMPO radical parts connect to the TTF skeleton through a 1,3-dithiol-2-ylidene ring to prevent the steric hindrance of the bulky TEMPO radical for the purpose of the realization of metallic conductivity. Furthermore crystal structure and physical properties…