Materials Literature
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Im Rahmen des Europaeischen Fusionprogrammes werden derzeit verschiedene test blanket module (TBM) entwickelt, die in ITER, dem ''International Thermonuclear Experimental Reactor'', erprobt werden sollen. Das vom Forschungszentrum Karlsruhe GmbH vorbereitete TBM spiegelt ein mit Helium gekuehltes Feststoff-Blanket (en…
The basic principles, system constituents and typical sintering technique of spark plasma sintering (SPS), a new advanced sintering technique used for materials consolidation. SPS were discussed to further study its advantages. Nanomaterials synthesis, functional gradient materials (FGMs) and high density fine grain…
We have developed isotropic magnet powder with the composition of (Sm, Zr)(Fe, Co)zB0.1Nx (z=9-10) prepared by rapid quenching, annealing, and nitrogenation. The presence of both zirconium and cobalt make it possible to realize a nearly single phase of the TbCu7 structure with a c/a ratio as high as 0.87. These powder…
The absorption spectra,emission spectra and thermal stability of Er3+-doped (85-x)Bi2O3-(10+x)B2O3-5Na2O(x=0,5,10,15,20,25 mol%)glasses were investigated in this work.The Ωt(t=2,4,6)(Ω2=(352—386)×10-20cm2,Ω4=(138—152)×10-20cm2，Ω6=(093—117)×10-20cm2)parameters were calculated by Judd-Ofelt theory.The stimulated e…
This paper presents a method of reducing the X-ray diffraction data collection tim e, while maintaining high data quality, suitable for Rietveld refinement. The approach taken here is that phases in general show peak broadening as well as a loss of intensity with increasing 2-theta. Thus, by splitting the full analyze…
Understanding the behavior of polymeric materials, particularly their biodegradation, is fundamental for solving problems in the management of environmental residues. In this work, we used a monitoring system based on an aerobic biodegradation technique known as the Sturm test to investigate the biodegradation of poly…
Adipic acid was crystallized by cooling in a batch crystallizer. At low seed loadings, the product crystal size distribution (CSD) was bi-modal because of enormous secondary nucleation. However, at high seed loadings, it became uni-modal, where the crystallization was dominated by seed growth with practically no secon…
Tantalum in contact with gallium is compressed up to 7 GPa and heated. When the temperature keeps above 50°C of the melting temperature of gallium, the lattice constant of tantalum is approximately constant. The lattice expansion begins to increase with raising the temperature from above 300°C. The expansion becomes a…
Abstract The electrochemical behaviour of two steels typically used in power boilers has been studied in the temperature range from 540°C to 680°C. Two environments were used: a) a synthetic salt mixture of 80% V 2 O 5 − 20% Na 2 SO 4 and b) oil ash collected from a high temperature reheater. Corrosion rates obtained…
Abstract A new process for boric acid production is developed. In this process the crystalline boric acid particles are directly produced in a one‐stage crystallizer through the reaction of colemanite particles with propionic acid. Each porous colemanite particle is comprised of spherical solid grains. It is found tha…
In order to investigate the influence of shot peening on the surface durability of sintered powder metal gears, the plasma case-hardened sintered powder metal rollers and gears shotpeened with different condition were fatigue-tested under a sliding-rolling contact condition. The hardness, the compressive residual stre…
For nematic lyotropic liquid crystals it has been experimentally observed that in nontreated glass cells the director in the surface layer can be reoriented by a magnetic field in any direction parallel to the surface, and the final state is stable. In this paper we will focus on the equilibrium configuration of the d…
The effect of the type of alcoholic solvent on the formation of SiO2 gels in the sol-gel process has been studied by observing the gelation time in a tightly closed system. A large difference in the rate of gelation was found among fifteen kinds of alcohols used as the solvent. The gelation time decreased with increas…
Plasma technologies for the destruction of ozone-depleting substances are reviewed. Particular attention is paid to the PLASCON process, based on an argon plasma produced by a dc plasma torch, which is used to destroy halons and chlorofluorocarbons in Australia and the UK. Three different approaches to modelling the d…
A new hybrid ceramic-polymer coating was designed to provide a chemical barrier to protect metallic substrates against corrosion. This material is completely hydrophobic, protecting the coated surface from chemical attack from its environment. A good adhesion between the organic and inorganic phases was achieved, prod…
The magnetic properties and crystal structures of nanocrystalline Sm-Fe-Co-Nb-B compounds were studied using rapid quenching technique and powder x-ray diffraction analysis. As a result, it was found that the TCu7-type structure was able to be obtained even if the B content of the ribbons was around 8at%, and high mag…
We investigate the ferroelectric phase transition and the domain formation in a periodic multilayer structure consisting of alternate ferroelectric (FE) and paraelectric (PE) layers of nanometric thickness. The principle result of this study is that the polarization domains formed in the different FE layers interact w…
Abstract Die Reaktion des chloroverbrückten, orthopalladierten Bis(2, 2, 5, 5‐tetramethyl‐4‐phenyl‐2, 5‐dihydroimidazolin‐1‐oxyl) mit dem Oxalsäurediamid‐verbrückten Bis(tetramethylpiperidin‐oxyl) ( 1 ) liefert einen Tetranitroxiddipalladium‐Komplex 3 mit einer Oxamid‐Brücke in der trans ‐Konformation, der röntgenogra…
Fiber-blending irregularities and fiber distribution in blended-yarn cross-sections are particularly important in determining the mechanical, functional, and aesthetic properties of textile products. In the work reported in this paper, wool/acrylic blended worsted yams with a linear density of 32 tex (31 Nm), twist le…
The wide application of pressure sensitive adhesives (PSAs) in thin film transistor liquid crystal display (TFT-LCD) devices is based on their advantages that PSAs provide sufficient bond strength and also are cleanly removable upon debonding. These two essential requirements are not obtainable without a proper unders…