Materials Literature
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Global Thermoelectric, Inc. is developing low cost, intermediate temperature (700 – 800°C) solid oxide fuel cell (SOFC) technology and systems for stationary applications. A pilot plant with an ultimate capacity of 10 MW per year has been built to develop and demonstrate high-volume, low cost manufacturing processes f…
Two compounds, Dy2(WO4)3 and GdY(WO4)3, were synthesized by using the standard solid state reaction technique. The crystal structure was determined by powder X-ray diffraction and Rietveld refinement method. It is found that both compounds have Eu2(WO4)3-type monoclinic structure, with space group C 2/c, Z = 4. The un…
シリカ充てんニトリルーブタジエンゴム (NBR) のバウンドラバー発現機構について検討を行った. NBRの分子量が同程度の場合, バウンドラバー量および, ゴム中でシリカが形成する凝集サイズはNBR中のニトリル含有率増加に伴い減少した. 赤外吸収スペクトル測定の結果, シリカ表面のシラノール基とNBR中のニトリル基との間に水素結合の存在が示唆された. このような水素結合の存在は, シリカ粒子が形成する凝集構造の発達を抑制し, その結果として, 凝集構造内部に取り込まれるフィラーゲル量が減少し, バウンドラバー量が減少すると考えた.
Pleurosigma strigosum W. Smith is not a variety of P. angulatum (Quekett) W. Smith but a different species, as confirmed in SEM. This conclusion agrees with that of Hendey (1964), who typified the species. P. finmarchicum Cleve in Cleve and Möller 1882 does not show specific differences from P. strigosum. This paper g…
The CD‐SEM, which has been the major tool for critical dimension metrology for the last twenty years, now faces severe challenges to its utility and predominance. The problems that must be solved are outlined, and the possible scenarios for progress are described.
In order to achieve a full characterisation of metal particles nanostructures at the microstructural level, we show in this overview the use of different techniques: i) High resolution transmission electron microscopy (TEM) or energy filtered TEM (EFTEM) associated to energy dispersive X-Ray analysis (EDX) and electro…
Miscibility of PVC with chlorinated PE and chlorinated PVC was reviewed. The miscible region of chlorine content ranged from 44 wt% to 65 wt%, which was not symmetric to the chlorine content of PVC, 56.7 wt%. Two group contribution methods were used to calculate solubility parameters of polymers. The results of solubi…
Zinc-nickel alloys obtained from an alkaline bath were passivated with a black, silver-free, chromate conversion coating (CCC). The attack of the chromate solution on the coatings changed most of their characteristics. The CCC modified the composition, thickness, structure, roughness, and stress level of the alloys. S…
Copyright for this article belongs to National Institute of Technology(NIT), Rourkela, India
LTC
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…