Materials Literature
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Abstract The physical properties, thermal stability, rheology and tensile properties of a commercial semi‐crystalline and an amorphous thermotropic liquid crystalline polymer (TLCP) have been investigated. Analysis by differential scanning calorimetry (DSC) and dynamic mechanical thermal analysis (DMTA) confirm the pr…
Diffusion coefficient and solubility of hydrogen in commercial pure solid aluminum of 2N(99.7 mass%) were measured by means of the ordinary desorption method, and they were compared with those of high-purity 4N aluminum. A variety of distribution of intermetallic compound particles did not essentially influence the hy…
The redox reaction between trans-dioxotetraphenylporphyrinruthenium(VI) and two equivalents of the five-coordinate iron(II) salicylideneamine complex Fe(salmah) in toluene results in the transfer of two electrons and formation of the novel bis-µ-oxo trimetallic complex [RuIV(tpp){OFeIII(salmah)}2] containing first and…
(1992). Friction welding of shape memory alloy. Welding International: Vol. 6, No. 1, pp. 20-25.
The first crown ether-based bola-amphiphiles are prepared and are shown to aggregate into a previously unknown type of niosome.
Intergranular corrosion of irradiated austenitic steels has been attributed to compositional changes produced by radiation-induced segregation at grain boundaries, and the effect has been investigated for the 20Cr/25Ni/Nb stainless steel employed as fuel cladding in advanced gas-cooled reactors. Analytical electron mi…
The formation process of kaolinite from the amorphous mixture of silica and alumina by hydrothermal reaction was studied by XRD, IR, DTA-TG, TEM, and high-resolution solid state 29 Si- and 27 Al-MAS/NMR. The amorphous mixture of the starting material prepared with commercially available silica-sol and alumina-sol was…
In order to ensure the high quality necessary for use in scientific instruments, most high-technology optical glasses are melted in platinum containers. In general, this noble metal has excellent corrosion and erosion resistance, as well as low solubility, when in contact with molten glass. Therefore the dangers of di…
Description STP 1167 addresses special problems engineers encounter when developing and using wear tests for ceramics and other advanced materials.
Description 80 peer-reviewed papers address these issues: • Hazards and Methods (including aerosols, physical resistance, biological, chemical, pesticides, and thermal and heat) • Field tests, New tests, Evaluations, Design, Physiological, Performance (including field tests, new and improved tests, evaluations, physio…
An 800 kV gas-insulated switchgear, with a capacity level recognized as the largest in the world, was developed as the first development of UHV gas-insulated switchgear, and good results were obtained in the type tests for this switchgear. With the gas circuit breaker and the disconnector used in this gas-insulated sw…
The impact of the assumptions inherent in using the Mott‐Schottky theory to identify deep‐level electronic states in semiconductors was assessed by comparison to the results of a less restrictive mathematical model. The model, developed in another paper, treated the transport and recombination reactions involving elec…
Poly(3-methylthiophene) films made electrochemically inactive by overoxidation in the presence of Cl– can be reactivated both electrochemically and chemically to produce a partially chlorinated conducting polymer.
Poly(rA) binds poly(rG).poly(rC) to form a triple helix. Evidence for this structure includes ultraviolet absorbance mixing curves and melting curves, and circular dichroism spectroscopy. The formation of the triple helix depends on the length of the poly(rC) strand. Triple helix forms when the average length is aroun…
The behavior of concentrated Brownian suspensions in a linear shear flow is studied numerically. Particle trajectories are calculated by Stokesian dynamics, a molecular‐dynamics‐like method that accurately represents the suspension hydrodynamics, including both many‐body interactions and lubrication. The simulations a…
A detailed mathematical model is presented to investigate the chemical vapor infiltration (CVI) of fiber‐reinforced ceramic composites with a volume‐heating source. Volume heating may be achieved by using microwave power or radio frequency (RF) induction in the case of conductive substrates. The analysis includes a se…
Pure low-molecular-weight mesogenic compounds as well as mesogenic mixtures, able to form glass phases above room temperature, have been investigated by microscopy, calorimetry and X-ray scattering. Indications for two types of short-range order (SRO) in the glassy state have been found. Diffuse low-angle scattering m…
Abstract A new correction method for obtaining quantitative electron probe microanalysis results is described. It utilizes data provided by Monte Carlo simulations and tracer measurements to obtain a detailed picture of the way in which the x‐ray emission process is influenced by the relevant experimental parameters.…
The crystals PbTiO3:Mn have been obtained. The influence of Mn dopant on light absorption, electric conductivity, dielectric permittivity was observed. The defect centers of Mn24, Mn4+, Vo, Fe3+-Vo were determined with EPR test.
The capacitive network often used for the calculation of initial voltage distribution along a transformer winding can be in error for steep impulses. As such pulses are produced by partial discharges (PDs) the application of the concept could contribute to inaccuracies in methods developed for the location of PDs in w…