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。
Ignalina NPP Unit 1 with the RBMK-1500 type reactor enters the preparatory stage for its decommissioning. A big volume of graphite has to be dismantled and managed. This paper evaluates the composition of radionuclides in irradiated graphite on the basis of the calculation scheme with computer codes MCNPX and CINDER'9…
CeO2 (cubic fluorite) thin films have been deposited on no-rolled Hastelloy C276 substrates by metal-organic chemical vapour deposition (MOCVD) from the Ce(hfa)3·diglyme [Hhfa = 1,1,1,5,5,5-hexafluoro-2,4-pentanedione; diglyme = (CH3O(CH2CH2O)2CH3)] precursor. The X-ray patterns of all samples grown in the 350–550 °C…
Growth of five strains of sulfur-oxidizing bacteria Acidithiobacillus thiooxidans, including strain NB1-3, was inhibited completely by 50 microM of sodium tungstate (Na(2)WO(4)). When the cells of NB1-3 were incubated in 0.1 M beta-alanine-SO(4)(2-) buffer (pH 3.0) with 100 microM Na(2)WO(4) for 1 h, the amount of tun…
A facile and mild solution method has been discovered for the synthesis of complex PbTe hopper crystals in large quantities, which are highly similar to the cubic halite skeletal crystals formed from extreme supersaturation in salt lakes existing in nature. This route may provide a new approach to growing other comple…
Our air drawing model of polymers in the melt blowing process is verified by the experimental results obtained with our university’s equipment. The predicted fiber diameters tally well with the experimental data. The effects of the processing parameters on the fiber diameters are further investigated in this paper. We…
Two samples of the gold-substituted silicon clathrate, Ba 8 Au x Si 46– x , have been synthesized from the elements at high temperature, one without subsequent treatment (so-called AG for as-grown) and the other after annealing in a silica tube (so-called A for annealed). A structure analysis on single crystal of both…
The use of fouling factors in heat exchanger design and the lack of appreciation of fouling in traditional pinch approaches have often resulted in crude preheat networks that are subject to extensive fouling. The development of thermal and pressure drop models for crude oil fouling has allowed its effects to be quanti…
A new enantiomeric interpenetrating 3D nets with chiral helical coordination silver(i) polymer was achieved via self-assembly using the new ligand modular approach, in which the special helical conformation of the ligand provided the opportunity to translate chirality from one metal center to others.
A new drape elevator is developed to analyze the drape generation mechanism. The drape elevator can measure drape shape, including node generation at various stages during drape formation. The drape elevator method indicates better reproducibility of the drape coefficient of the fabrics than the conventional method. T…
The paper describes regularities of a non-stationary nucleate boiling process during quenching of steels in a liquid media. A generalised correlation for the calculation of the nucleate boiling process duration is obtained. A definition of a self-regulated thermal process that takes place during quenching is introduce…
Solid solution Mg2Si1−xGex for various concentration of germanium, x, is successfully prepared in single phase by the bulk mechanical alloying (BMA) and the hot pressing (HP). Both BMA and HP process conditions were optimized to yield high dense samples with fine, homogeneous microstructure. The electrical conductivit…
Lanthanide(III) complexes of the general formula [Ln(ACAB)(2)(NO(3))(2)(H(2)O)(2)].NO(3).H(2)O where Ln=La(III), Pr(III), Nd(III), Sm(III), Eu(III), Gd(III), Tb(III), Dy(III) and Y(III), ACAB=3-acetylcoumarin-o-aminobenzoylhydrazone have been isolated and characterised based on elemental analyses, molar conductance, I…
For a microwave total-power radiometer, we consider the error introduced by neglecting the difference in the antenna reflection coefficient between when it views a distant scene and when it views a nearby calibration target. An approximate expression is presented for the error, and measurements are described that enab…
Well-crystallized carbon micro-spheres at the sub-micrometer scale were prepared by defluorination of polytetrafluoroethylene (PTFE) with metallic magnesium in supercritical carbon dioxide at 650 °C for 6 h. The products were characterized by X-ray diffraction, transmission electron microscopy, field-emission scanning…
The complex [Gd(L)(H2O)]3- (H(6)L =N,N'-bis(6-carboxy-2-pyridylmethyl)ethylenediamine-N,N'-methylenephosphonic acid) displays the highest water exchange rate ever measured for a Gd(III) chelate (k(298)(ex)= 8.8 x 10(8) s(-1)), which is attributed to the flexibility of the metal coordination environment.
In the present paper the approaches to modelling scale failure described in EPRI report FP 686 are compared to a more recent approach based on micromechanical considerations. The latter requires a detailed analysis of the stress situation in the oxide/metal system and of the “quality” of the oxide scale and scale/meta…
A zirconia and silica co-doped titania material was prepared from a sol–gel method which had been modified to include an organic templating agent. The product was only poorly mesoscopically ordered. However, the materials produced exhibited a very high temperature for the anatase to rutile phase transition (ART) such…
The effect of Co addition on the martensitic transition and magnetic properties of the Ni-Fe-Ga β alloys is investigated. The values of both the Curie temperature Tc and martensitic transition starting temperature Ms increase, while the saturation magnetization Is decreases with increasing Co content in the series of…
The basic matching problem of a propulsion engine to the propulsor is discussed and the influences which should be taken into account. The concepts of sea margin, engine margin and light running margin are handled and an indication of their values is given. The methods of calculation to evaluate design and off design…
Dynamic mechanical behaviors of 45 steel have been studied with the split Hopkinson pressure bar(SHPB) and static material test system over a wide range of strain rates and temperatures.The Johnson-Cook constitutive relationship parameters are determined through these experiments.The parameters are validated by compar…