Materials Literature
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The integrated absorption cross section, the spontaneous emission probability, and the stimulated emission cross section of Yb 3+ were determined in silicate, phosphate, borate, germanate, aluminate, gallate, and ZBLAN host glasses. The compositional dependence of the stimulated emission cross section of the 2 F 5/2 →…
The structure and reactivity of Rh films supported on thesurface of a CeO2single crystal were studied using Augerelectron spectroscopy (AES) and temperature-programmeddesorption (TPD). Rhodium films deposited from the vapor phasewere found to grow via the nucleation of three-dimensionalparticles at a sample temperatur…
An on-chip aluminum interconnect carries an intense electric current at an elevated temperature, motivating atoms to diffuse in the solid state, and inducing voids that may cause an open failure. Recent observations have shown that a void sometimes collapses to a slit running nearly perpendicular to the electric curre…
Abstract This paper provides a scientific treatment for mixing of rubber with reinforcing fillers. The primary attention is given to the viscoelastic nature of rubber. It is addressed to the practitioners of rubber processing, who have hands-on experience but lack familiarity with viscoelasticity. In the first part we…
Abstract The results from four research projects on ammonia stress corrosion cracking (SCC) are provided, including the effect of oxygen and water in the ammonia, prevention of SCC with electrochemical methods, crack growth rate studies, and behavior of welds. Practical recommendations are given for construction, insp…
Two families of polypropylene hybrid composites were prepared by simultaneously compounding polypropylene at 240°C together with SEBS thermoplastic elastomers and filler particles, for example, anisotropic talc and isotropic glass beads. Addition of SEBS was compared with that of maleic-anhydride-grafted SEBS (SEBS-g-…
A solar energy absorbing and retaining fabric has been developed by incorporating a zirconium carbide compound into the core of the filaments. The resulting fabric absorbs visible and near infrared solar rays and converts them into thermal energy; it also reflects body heat. In this paper, we describe the basic solar…
The Japan Atomic Energy Research Institute (JAERI) and the United States Nuclear Regulatory Commission (USNRC) are jointly conducting confirmatory, integral testing on the Westinghouse AP600 reactor transient responses by using the ROSA-V Large Scale Test Facility of JAERI. This facility, built originally to simulate…
On the basis of experimental results for the electrical breakdown field Fb in polyethylene terephthalate films, investigated previously under high hydrostatic pressure, P, from 50 to 500 bar at temperatures, T, of 35, 70, and 100 °C, the electromechanical and thermal breakdown models were used to explain variations in…
Eight pairs of carbon and stainless steel, long and short radius welding elbows were tested under conditions of steady internal pressure and in-plane, resonant dynamic moments that simulated seismic excitations. The elbows had an outside diameter of 60.3 mm and thicknesses of 3.91 and 5.54 mm. The material properties…
The magnetic properties of soft magnetic materials are based on dynamic behavior of magnetic domain walls. Many domain structure studies have contributed to the progress of magnetic materials. In this paper, the present state of new development in advanced grain-oriented silicon steel is introduced through the aid of…
An analytic solution for the normalized intensity for powder x-ray diffraction has been obtained for a simple two-dimensional lattice using a linear approximation for the interference function. The analytic solution, where the Bragg peaks are strongly asymmetric, is compared to computer simulations using the Debye for…
External corrosion and cracking are major threats for buried pipelines in sparsely settled, geologically benign areas. External corrosion is the main deterioration mechanism that can reduce the structural integrity of buried gas transmission pipelines on the Nova Gas Transmission pipeline system. To protect against ex…
Relief of strain is the driving force for the [2 + 2] cycloaddition and subsequent [2 + 2] cycloreversion of 1 with both open-chain and cyclic alkenes. The metathesis can even be performed with benzene as the olefin component [Eq. (a)]. The product can be roughly described as a ribbon- or beltlike conjugated system.
In this paper, a model is proposed for numerical simulation of transient state in three phase transformers. The model derived from circuit theory is based on association of linear and nonlinear reluctances. A large number of existing models are dealt with and discussed in detail. New approaches for leakage and core fl…
We have studied transport properties, including the thermopower and its field dependence, between 5 K and room temperature in films of ${\mathrm{La}}_{0.67}$${\mathrm{Ca}}_{0.33}$Mn${\mathrm{O}}_{3}$ fabricated by simple metalorganic decomposition technique. A large negative magnetothermopower, $\frac{[S(H)\ensuremath…
This paper describes the formulation and implementation of a generalized dynamic magnetic core circuit model suitable for both low- and high-frequency applications. The behavior of magnetic cores with any arbitrary flux waveforms is modeled by a simple ladder network consisting of nonlinear inductors and resistors. Th…
The interaction of murein hydrolases and synthases was studied by affinity chromatography. The lytic transglycosylases Slt70 and MltB of E. coli were purified and covalently linked to CNBr-activated Sepharose. Membrane extracts were analyzed for proteins that interact with the immobilized murein hydrolases. Slt70-Seph…
A numerical model for the prediction of microstructure and microsegregation in multicomponent alloys during dendritic solidification using a finite difference scheme is presented. The main kinetic and thermodynamic effects that can influence microsegregation (solid state back diffusion, secondary dendrite arm coarseni…
Abstract The phase changes that took place upon heating an Fe-rich illite (OECD #5) to 1300°C in an oxidizing atmosphere were studied by a variety of mineralogical techniques. Infrared spectra, showing the stepwise dehydroxylation of the illite, showed good agreement with variations in sample colour and Mössbauer spec…