Materials Literature
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In this paper we prove the convergence of an iterative scheme of fractional steps type for the phase-field transition system. The use of this method simplifies the numerical algorithms due to its decoupling feature. The 2D case is considered and numerical results are reported.
Article Studies on the biodegradable poly(hexano-6-lactone) fibers 1. Structure and properties of drawn poly(hexano-6-lactone) fibers (Technical Report) was published on January 1, 1997 in the journal Pure and Applied Chemistry (volume 69, issue 12).
The influence of diastereoisomerism on the electrochemical behaviour of the atropisomeric cyclophanes 1a and 1b was found by cyclovoltammetric studies. Compound 1a can be oxidized and reduced reversibly in a two step redox process similar to that of model compound 2. In contrast, 1b shows a different electrochemistry.…
This paper presents a new electroplating process that uses an electrolyte jet containing SiC particles for the formation of electrodeposited Ni–P matrix composite coatings. The electrolyte jet remarkably increases the limiting current density in electroplating, so that the deposition rate will be approximately 10 time…
We developed a new positive working photosensitive polymer for semiconductor surface coating. Base resins were considered three kinds of heat-resistance polymers and we found that polybenzoxazole precursors(PBO) with photosensitizer diazonaphtoquinones and silicone modified polyamic acids added as adhesion promoters s…
Low alloy Cr and CrMo steels have been studied to determine their susceptibility to hydrogen embrittlement. The steels were quenched at a constant cooling rate of 30 K s-1 and tempered at 673 and 973 K. Hydrogen charging of steels was carried out in 0.5 M H2SO4 solution without and with addition of propargylic alcohol…
Organic-inorganic hybrid coating films were prepared using vinyltriethoxysilane and tetraethoxysilane by the sol-gel method on polyimide substrates. Tetraethoxysilane (TEOS) and vinyltriethoxysilane (VTES) or polyvinyltriethoxysilane (PVTES), which was obtained by the radical polymerization of VTES, were used as start…
Chemical vapour deposition (CVD) is a promising process for the production of ferroelectric complex oxide films having a large electro-optical coefficient. We report the epitaxial growth of high-quality BaTiO 3 films using a single-source CVD process. A variety of epitaxial relationships have been achieved with BaTiO…
The importance of layer structures for the synthesis of zeolite beta is demonstrated. Zeolite beta is formed via a layered-aluminosilicate, which forms spherical agglomerates with diameters in the range 20–50 µm. The transformation into the beta form occurs within the agglomerated particles. The agglomerates are prese…
29Si- and 13 C-CP/MAS-NMR-spectroscopy were used to investigate the influence of substance-specific parameters such as silane concentration, type of silane, pH and moisture content of the filler on the silica/organosilane reaction mechanism. After reviewing several theoretically conceivable reaction models, one horizo…
Although the exact mechanism of self-healing effect of chromate coating is still not clearly understood, this mechanism is known to prevent not only the corrosion of metal substrate under the chromate coatings but also from the coating defects. This research focuses on investigating the corrosion behavior of chromated…
Specific adsorption of anions on surfaces of metals and oxidized metals is reviewed in relation to the hard and soft acids and bases principle. Anions classified as soft bases are readily chemisorbed on the bare metal surface equivalent to a soft acid, resulting in suppression and stimulation of metallic corrosion in…
In this paper, an important discussion of transformer design and modeling is given. Anisotropy effects of the transformer laminations have been stressed in the light of the investigation of a three-phase three-limb transformer T-joint. Three simple T-joint modeling schemes accounting for the lamination anisotropy are…
The Raman and infrared spectra of dimethylformamide (DMF)/polyacrylonitrile (PAN) /lithium perchlorate have been measured and analyzed. It is found that the interaction between DMF and PAN is not strong, probably resulting from the dipole interaction between the O=C‒N group of DMF and the nitrile group of PAN. Compare…
We report the superlattice of the modulated structure DySe 1.84 . The modulation is of the charge density wave type, associated with electronic states on selenium atoms arranged in two-dimensional square nets. The complete modulated structure can be described in the superspace group formalism in a 3+2 dimensional spac…
Difficulties have previously been noted in the use of the D and H fields in the Maxwell boundary conditions when these are applied to theories of reflection effects involving chiral media. Such difficulties may be avoided by adopting covariant forms of D and H. These are derived in the electric quadrupole–magne…
A study was carried out to investigate the effect of various hydrodynamic parameters on the corrosion rate of low carbon steel in CO environments in the presence of inhibitors. Two different flow geometries, rotating cylinder and pipe flow, were studied simultaneously in the same electrolyte within a glass loop. Compa…
The development of two low cost, corrosion resistant Fe-Mn-Si based shape memory alloy systems: Fe-Mn-Si-Al-Cu and Fe-Mn-Si-Cr-Cu is discussed. The new alloys exhibited a shape memory capacity which is clearly superior to traditional Fe-Mn-Si ternary alloys. Corrosion test results indicated that the new alloys have go…
Nanometre voids and holes have been produced in aluminium films up to 220nm thick by the stationary focused 100 keV high-current-density electron probe in a dedicated scanning transmission electron microscope. The electron energy is below the threshold for bulk displacements in aluminium but is sufficient to cause spu…
A surface-enhanced Raman scattering (SERS)-active Ag particle-doped cellulose gel film was prepared reproducibly by the counter diffusion method. In the literature, SER spectra of 2,2′-bipyridine and phthalimide were similar to those adsorbed on Ag sol. This doped film permits the SERS of a vital functional substance…