Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
tert-Butyl-substituted vanadocene, (C5H4CMe3)2V (1), is used as a precursor in the CVD preparation (740 °C under hydrogen at atmospheric pressure on steel substrates) of crystalline VC0.88 thin films, characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) a…
Abstract An ARC TM or similar experimental apparatus provides the transient temperature history of a chemical system under adiabatic conditions. The information obtained has several applications in the design and operation of industrial systems. Of particular interest is use of the adiabatic kinetic data to define “in…
This paper describes a new magnetic device consisting of a 12 mm/spl times/12 mm planar magnetic path-type transformer utilizing a parametric oscillation. The device is formed from a stack of 50% Ni-Fe laminations or Fe/sub 3/Co/sub 70/Si/sub 15/B/sub 10/ laminations, and is composed of magnetic paths with three legs…
Abstract A millable polyurethane prepared from castor oil was blended with natural rubber in a two‐roll mill and sulfur‐cured. It was observed that blending of more than 50/50 (by weight) of the polyurethane with natural rubber was not feasible. Blends were found to have improved tensile modulus and abrasion resistanc…
The misfit layer compounds (MX)(1+x)(TX(2))(m) (with M = Sn, Pb; T = Ti, Nb; X = S, Se; 0.08
The purpose of this study is to develop a void fraction correlation based on the void data measured by an X-ray CT scanner. The tests were carried out in an out-of-pile test facility that can simulate the high pressure and high temperature conditions of BWRS. An electrically heated test assembly simulated a BWR fuel a…
Influence of residual porosity on the flexural strength and fracture toughness of pressureless-sintered α-SiC ceramic with controlled microstructure, characterized by equiaxed-grain and a mixture of equiaxed/plate grains were investigated together with the trend of σ-KIC behavior. Both the flexural strength and the fr…
The Si-Ti-C-O fiber (STC (6)) with a low oxygen content of 6mass% was oxidized at temperatures in the range of 1273 to 1773K in order to measure its oxidation rate and thereby to elucidate its oxidation behavior. These results were compared to those of the commercial fibers having 18 and 13mass% O (STC (18) and STC (1…
Magnetic properties and domain structure were investigated for die-drawn and subsequently annealed Fe-Si-B amorphous wires. It was found that the die-drawn wire has a bamboo domain similar to that of the Co based wire with negative magnetostriction and looses the re-entrant flux reversal characteristic. It was also fo…
Stishovite, the SiO2 polymorph obtained at extremely high pressure with octahedrally coordinated Si atoms, has been characterized by means of techniques usually employed in surface chemistry. Its surface properties have been investigated in order to explain why stishovite is the only non-pathogenic SiO2 crystalline po…
The formation of metal-ceramic multi-phase microstructures by partial reduction of ternary or higher ceramic oxides has been experimentally investigated in the model system FeMnO and in the more practical system AlNiO by changing the oxygen partial pressure at constant temperature and total pressure. In the FeMnO syst…
Summary A type 329J1 duplex stainless steel was welded by single‐pass gas tungsten arc welding in an argon‐nitrogen mixed gas atmosphere. The microstructure, Vickers hardness, and Charpy impact toughness of the weld metal were examined. The nitrogen content increases and the ferrite content decreases with increasing n…
The Pitzer ion-interaction model was employed to predict the conversion in the title quaternary water-salt system. The thermodynamic solubility products (K s 0 ) were determined and the conversion of CaSO 4 to CaCO 3 in the CaSO 4 + Na 2 CO 3 = CaCO 3 + Na 2 SO 4 system was predicted. The standard molar Gibbs free ene…
Pd/Al2O3 samples of different palladium loadings were prepared by an incipient wetness technique. The palladium dispersion (D) of each sample was estimated from its isotherm of hydrogen uptake measured volumetrically at 298 K. The isosteric heat of hydrogen sorption (q, including absorption and adsorption) on palladiu…
The combustion behavior of several elemental materials was studied using their threshold pressures (minimum pressure required to sustain combustion in 3.2-mm-(0.13-inch) diameter rod) as the ranking criterion in a promoted combustion test apparatus. Test media varied from 100% aviator's breathing oxygen to air and the…
The key to conducting an accurate damage assessment of a target impacted by a high speed projectile is the use of a robust assessment methodology. To accurately determine total target damage, a damage assessment methodology must include the effects of discrete impacts by solid debris cloud fragments as well as impulsi…
Chemical states of Mn in BaTiO3 and interactions between Mn and other dopants were studied mainly by chemical analysis and ESR spectroscopy. Chemical analysis showed that the average valency of Mn doped into BaTiO3 was about 3.4, indicating the occurrence of a significant concentration of oxygen vacancy. The average v…
V 1– x W x O 2 and V 1– x Mo x O 2 , 0 < x < 0.03, powders have been produced by the evaporative decomposition of solutions of vanadyl sulfate hydrate with tungsten dioxide dichloride or molybdenum dioxide dichloride in a hydrogen/nitrogen atmosphere. The powders consist primarily of hollow, porous, spherical sh…
This work, based on the Doctoral thesis of the autor (Santamaria, 1991), deals on the sistematics of the superfamiliy Acanthocerataceae from the Upper Cenomanian to Santonian of the northern part of the North-Castillian platform and the southern part of the Navarro-Cantabrian basin. In this second part fifty ammonite…
The palladium(II) complexes cis-[PdCl2([18]aneS2O4)], [Pd([18]aneS2O4)2][PF6]2([18]aneS2O4= 1,4,7,10-tetraoxa-13,16-dithiacyclooctadecane), [Pd([18]aneS3O3)2][PF6]2([18]aneS3O3= 1,4,7-trioxa-10,13,16-trithiacyclooctadecane) and [PdCl([20]aneS3O3)]BPh4([20]aneS3O3= 1,4,7-trioxa-10,14,18-trithiacycloicosane) have been s…