Materials Literature
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The BMW Group is engaged in the development of a SOFC system for mobile applications (auxiliary power unit – APU). Since this application demands low weight and high durability, metal supported-cells are preferred instead of sophisticated SOFCs using a thick anode support. Therefore tape-cast and pre-fired ferritic st…
Scandia stabilised zirconias offer much better performance than the conventional yttria stabilised materials and now it seems that availability and cost may not be hugely problematic. This offers a very important way forward to fuel cell manufacturing. It is shown here that a small addition of 2 mol% yttria to scandia…
The corrosion morphologies of as-extruded magnesium alloy AM60 in 3.5%NaCl aqueous solutions with pH 3 , 7 and 12 were observed, and the number and size of corrosion pits were measured. The effect of pH values on corrosion of AM60 and the role of AlMn particles in corrosion were discussed. A corrosion model of AM60 wa…
A novel blend composition was prepared based on chlorinated butyl rubber (CIIR) and poly(meth)acrylate (PMAc).The results obtained from DMA,DSC measurements show that it is possible to shift the effective damping functional region of CIIR toward higher temperature region whether the blend composition was prepared with…
The polymer of chlorinated-phenyl methyl-terminated silicon oil (code as CPSO) was synthesized. The physical properties such as saturated vapour pressure and evaporation weight loss of CPSO were investigated. The thermal stability of CPSO was analyzed using thermogravimetric analysis in nitrogen atmosphere. The tribol…
Rapidly solidified (RS) AZ31 magnesium alloy ribbons were made using melt spinning technique. The results show that its microhardness increases with the wheel speed, and after heat treatment, the microhardness of the ribbons produced at 1 600 r/min also increases. Rapid solidification leads to reduction of grain size.…
Glass - like carbon, an important material with unique properties, has been widely used in many fields. Tremendous progress has been made in the research about the properties, methods of preparation, applications as well as fundamental structure of glass - like carbons in the past decades. The results available now in…
ポリアセタール (POM) の導電性を付与するため導電材料 (カーボンブラック (CB)) とともに添加した熱可塑性ポリウレタンエラストマー (TPU) の相構造の効果について考察した. 電子顕微鏡 (SEM) 観察から, POMの海相にCBを包含したTPU相が分散していることが確認された. これはPOM, TPU, CB各成分の表面張力から算出した界面張力を使ったHarkinsの式から分散状態を推定した3成分相構造とよく一致した. POM, TPU, CBの3成分系では, CBによるポリアセタールの熱分解も抑制されることが判明した. また, ポリアセタールを分解除去してもTPU相は形態を保ち, 導電性も維持していることから, T…
Transparent and conductive oxides CdIn2O4 (CIO) thin films were prepared by RF reactive sputtering from a CdIn alloy target in Ar+O2 atmosphere. By the analysis and measurements of transmittance spectra and Hall_effect of different samples prepared at different substrate temperatures and post_deposition annealing in…
On a capillary discharge setup lasing in Ne-like Ar at 46.9nm, the ablation of c apillary wall was investigated for polythene and alumina material at both of inh erent 2—5kA-pre-pulse of setup and separate pre-pulse of 20A by measuring soft x ray emission from the capillary discharged. For inherent pre-pulse and polyt…
The paper presents the results of a study of the formation and decay of lattice defects in nonlinear optical crystals of NH4H2PO4 (ADP), KH2PO4 (KDP), Li2B4O7 (LTB) and LiB3O5 (LBO) with a sublattice of mobile hydrogen (ADP, KDP) and lithium (LTB, LBO) cations. By means of the luminescent and absorption optical spectr…
Four kinds of biodegradable polymers were immersed in water around 301 K and 351 K for fixed periods from 1 to 720 hours, and their degradation was studied by observing their shapes, weights, molecular weights, and space charge distributions. Samples tested were poly-L-lactic acid (PLLA), polycaprolactone butylene suc…
The study was carried out on the survival of Escherichia coli and Aeromonas hydrophila in samples of mineral waters. Enumeration of the bacteria was performed by spread inoculation of samples (0.1 cm3) over the surface of selected media in Petri plates. Twenty bottles (four bottles of each of the five brands) of non-c…
The growth process of cerium oxide nanoparticles has been investigated by synchrotron Small-Angle x-ray scattering (SAXS) and x-ray absorption near edge spectroscopy (XANES) as a function of the annealing temperature in the range from 298 K to 973 K in atmosphere. The SAXS experimental intensity increases dramatically…
We report on a polarized x-ray absorption spectroscopy study, combining experimental measurements and ab initio calculations, of La 0.7 Sr 0.3 MnO 3 films, epitaxially grown on tensile and compressive substrates. Measurements show significant modifications in the coordination shell around manganese atoms in the film p…
Soy protein has great potential to partially replace petroleum based adhesives. Theweakness of protein-based adhesive has relatively low water resistance. Various chemical andenzymatic methods have been employed to improve the adhesive properties of soy protein. Thisresearch studied the effects of esterification on ad…
The purpose of this study is to examine whether molecular dynamics (MD) simulations using a commercially available software for personal computers can estimate the glass transition temperature (Tg) of amorphous systems containing pharmaceutically-relevant excipients. MD simulations were carried out with an amorphous m…
Phase variations of a wave transmitted through a monolayer of spherical scatterers are studied as functions of size, optical constants, and particle concentration for light incident normally to the surface of the layer. The analysis is performed in the quasi-crystal approximation of the theory of multiple scattering o…
Gas insulated switchgears, also called gas insulated substation, is applied to power system widely. Running experiences have shown that switching operations generates very fast transient overvoltage, which has steep front and is followed by high frequency oscillations. VFTO spreads out of GIS and endangers the equipme…
The crystallization of ergosterol was performed using water-immiscible hexane as a solvent. It was found that a ppm-level of water contained in hexane plays an important role in the change in the morphology of precipitates. The morphology of the ergosterol precipitates changed from thin needle-like crystals to spheric…