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Original Title
Issledovanie vliyaniya dispersnykh vklyuchenij dvuokisi tsirkoniya na uplotnenie nikhroma pri spekanii
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Journal Article
Literature Type
Progress Report
Journal
Izv. Vyssh. Ucheb. Zaved., Fiz; (no.10(101)); p. 104-109
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AbstractAbstract
[en] Five borosilicate glasses containing up to 20% zirconium oxide and 10% non-radioactive fission products or lanthanum oxide (which simulates the behaviour of the actinides) were leached in stagnant distilled water at 200 C for 2 years. The leaching rates of Na, La, Mn, Cs and Mo varied with time and the chemical composition of the glass from 0.7 to 12, 0.006 to 0.14, 0.8 to 1.2, 0.4 to 0.8 and 8 to 25 mg/m2/d respectively. The glasses which showed the best short-term resistance do not have the best long-term resistance. (orig.)
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Record Type
Journal Article
Journal
Journal of Nuclear Materials; ISSN 0022-3115;
; v. 125(3); p. 320-325

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AbstractAbstract
No abstract available
Original Title
Estudo da interacao das deslocacoes com a rede cristalina na liga Nb-1%Zr
Source
36. Annual Meeting of the Brazilian Society for the Advancement of Science; Sao Paulo, SP (Brazil); 4-11 Jul 1984; Published in summary form only.
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Journal Article
Literature Type
Conference
Journal
Ciencia e Cultura. Suplemento; ISSN 0102-2474;
; v. 36(7); p. 329

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Jang, Serk Won; Choi, Yong Nam; Seong, Baek Seok
Proceedings of international symposium on research reactor and neutron science2005
Proceedings of international symposium on research reactor and neutron science2005
AbstractAbstract
[en] The neutron powder diffraction and Transmission Electron Microscopy(TEM) were employed to study about the substitutional site of the Zr atom in the Zr-added LiCoO2. From the neutron diffraction study, it was concluded that the Zr atom is hardly incorporated in the LiCoO2 system and it exists in the form of ZrO2. Transmission electron microscopy observations also show that ZrO2(50∼100nm) is well distributed in the LiCoO2 system. The origin of the improvement of the cycling property and the rate capability are considered as the existence of the ZrO2 - LiCoO2
Primary Subject
Source
The Korean Nuclear Society, Taejon (Korea, Republic of); Korea Atomic Energy Research Institute, Taejon (Korea, Republic of); 922 p; 2005; p. 691-693; International symposium on research reactor and neutron science; Taejon (Korea, Republic of); 11-13 Apr 2005; Available from Korean Nuclear Society, Taejon (KR); 6 refs, 4 figs
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Miscellaneous
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Conference
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AbstractAbstract
[en] Highlights: • Zr-doped BFO exhibited best multiferroic properties. • The microstructural defects were studied by positron annihilation lifetime spectrum. • Cation vacancy has intimate correlation with the multiferroic properties of BFO. • The electric and magnetic properties of BFO can be improved by Ce/Zr doping. The polycrystalline samples of undoped BiFeO3, Ce doped BiFeO3 (Bi0.9Ce0.1FeO3) and Zr dpoped BiFeO3 (BiFe0.9Zr0.1O3) were prepared by rapid liquid phase sintering technique. The effects of A-site substitution with Ce and B-site substitution with Zr on the structure, defects and multiferroic properties of BiFeO3 ceramics were comparative investigated. Undoped and doped BiFeO3 samples are well crystallized in perovskite structure, whilst Ce and Zr doping results in slight distortion in the lattice structure. With Ce and Zr doping, the average grain sizes decrease. Positron annihilation lifetime measurements reveal that there are vacancy-type defects in the three samples, and Bi0.9Ce0.1FeO3 sample has the maximum open volume and concentration of the vacancy defect among those three samples. Both Ce and Zr doping can improve the leakage current, ferroelectric and magnetic properties, whereas Zr doping exhibited better ability. The better electric properties in BiFe0.9Zr0.1O3 may be due to the effective reduction of oxygen vacancies, Fe2+ and impurity phases by Zr doping. The cause for better magnetic properties in BiFe0.9Zr0.1O3 sample may be that the insertion of Fe vacancies and nonmagnetically active Zr4+ ions in antiferromagnetic Fe sublattice can effectively suppress the spiral spin modulation structure.
Primary Subject
Source
S092583881733757X; Available from http://dx.doi.org/10.1016/j.jallcom.2017.11.012; Copyright (c) 2017 Elsevier B.V. All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
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Journal Article
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AbstractAbstract
[en] The electronic and geometric structure of non stoichiometric pure and doped -Zr Yttria has been studied by means of photoemission and X-ray absorption. Main results show the influence of the doping atom on the level of non stoichiometry as well as on the induced disorder and on the change of the partial ionic character of the Y-O bond
[fr]
La structure electronique et geometrique de l'oxyde d'Yttrium pur et dope avec Zr est etudiee par photoemission et absorption X. Les resultats montrent l'influence de l'atome dopant au niveau de la non stoechiometrie ainsi que sur le desordre induit et sur le changement du caractere ionique partiel de la liaison Y-0Original Title
Etude XPS et EXAFS de la non stoechiometrie d'une ceramique Y203
Primary Subject
Source
Surface, materials, Technology. 1. Meeting on dielectric surfaces and 4. Meeting on adhesion; Surfaces, materiaux, technologie. 1. Journee d'etude sur les surfaces isolantes. 4. Journee d'etude sur l'adherence; Lyon (France); 10-14 Oct 1988
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Journal Article
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Conference
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AbstractAbstract
[en] Aluminum and its alloys are the second most commonly used metal for a variety of engineering applications. They solidify in columnar structure with large grain size which normally affects their mechanical behavior and surface quality. It is now becoming customary in aluminum foundry to grain refine their structure by adding either titanium or titanium + boron to their melt before solidification. In this paper, the effect of addition of Ti on the mechanical properties, ductility and wear resistance of commercially pure aluminum is investigated. Titanium was added at a level of 0.15 % wt. This ratio corresponds to the peritectic limit on the Al-Ti phase diagram and is normally used for grain refining of aluminum. It was found that addition of Ti at this level resulted in grain refinement of aluminum structure whereas addition of Zr alone resulted in grain coarsening of Al structure while it resulted in grain refinement when it is added in the presence of Ti. Regarding the effect of Zr on the wear resistance of aluminum it was found that at small loads and speeds addition of Ti or Zr or both together resulted in deterioration of its wear resistance whereas at higher loads and speeds resulted in pronounced improvement of its wear resistance. (author)
Primary Subject
Source
Khan, S.; Salam, I.U.; Ahmed, K. (eds.); 11 International Symposium on Advanced Materials, Islamabad (Pakistan); 468 p; 2009; p. 15-25; 11 International Symposium on Advanced Materials; Islamabad (Pakistan); 8-12 Aug 2009
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Book
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Conference
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AbstractAbstract
[en] The evolution behaviors of MnS inclusions during 1473 K heating have been systematically investigated for EH36 shipbuilding steel with Zr addition. It is revealed that heating promotes MnS precipitation on the surfaces of ZrO2 inclusions. Further, quantified results by confocal scanning laser microscopy indicate that the area fraction of MnS first increases, reaches a maximum value, and undergoes a sharp decrease, which corresponds to the three unambiguously defined stages, namely, coarsening, Ostwald ripening, and crushing.
Primary Subject
Source
Copyright (c) 2019 The Minerals, Metals & Materials Society and ASM International; Country of input: International Atomic Energy Agency (IAEA)
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Journal Article
Journal
Metallurgical and Materials Transactions. B, Process Metallurgy and Materials Processing Science; ISSN 1073-5615;
; CODEN MTBSEO; v. 50(3); p. 1134-1138

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[en] Aluminum and its alloys solidify in large grains columnar structure which tends to reduce their mechanical behaviour and surface quality. Therefore, they are industrially grain refined by titanium or titanium + boron. Furthermore, aluminum oxidizes in ordinary atmosphere which makes its weldability difficult and weak. Therefore, it is anticipated that the effect of addition of zirconium at a weight percentages of 0.1% (which proved to be an effective grain refiner on the weldability of aluminum grain refined by Ti) is worthwhile investigating. This formed the objective of this research work. In this paper, the effect of zirconium addition at a weight percentage of 0.1%, which corresponds to the peritctic limit on the aluminum-zirconium phase diagram, on the weldability of aluminum grain refined by Ti is investigated. Rolled sheets of commercially pure aluminum, Al grain refined Ti of 3 mm thickness were welded together using Gas Tungsten Arc Welding method (GTAW), formerly known as TIG. A constant air gap was maintained at a constant current level, 30 ampere AC, was used because it removes the oxides of the welding process under the same process parameters. Metallographic examination of weldments of the different combinations of aluminum and its microalloys at the heat affected zone, HAZ, and base metal was carried out and examined for width, porosity, cracks and microhardness. It was found that grain refining of commercially pure aluminum by Ti resulted in enhancement of its weldability. Similarly, addition of zirconium to Al grain refined by Ti resulted in further enhancement of the weldment. Photomicrographs of the HAZ regions are presented and discussed. (author)
Primary Subject
Source
Khan, S.; Salman, I.U.; Ahmad, K. (eds.); Trans Tech Publications Ltd., Switzerland, Durnten-Zurich (Switzerland); 623 p; 2011; p. 356-363; 12. International Symposium on Advanced Materials; Islamabad (Pakistan); 26-30 Sep 2011
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Book
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Conference
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AbstractAbstract
[en] A photometric determination of zirconium in low-alloyed steels (zirconium content is 0.02-1%) is developed. The method is based on the measurement of the colouring intensity of Zr(4) complex with arsenazo 3, formed in 2-10 n HCl solution. Lambdalsub(max) of the complex is 665 nm, molar coefficient of quenching in 2 n HCl solution is 1.2x105. Optimum concentration is 20-150 μg per 100 ml of the solution, the lower determination limit constitutes 0.05 μg/ml. Al, Cu, Mg, Mn, Ti do not interfere with Zr determination. Fe(3) is reduced with ascorbic acid
[ru]
Original Title
Opredelenie tsirkoniya v nizkolegirovannykh stalyakh fotometricheskim metodom s arsenazo 3 (pri soderzhanii tsirkoniya 0,02-1 %)
Primary Subject
Source
p. 154-156; 1980; p. 154-156; Metallurgiya; Moscow
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Book
Country of publication
ALLOYS, AROMATICS, ARSENIC COMPOUNDS, ARSONIC ACIDS, AZO COMPOUNDS, CARBON ADDITIONS, CHEMICAL ANALYSIS, COMPLEXES, HYDROXY COMPOUNDS, IRON ALLOYS, IRON BASE ALLOYS, ORGANIC ACIDS, ORGANIC COMPOUNDS, ORGANIC NITROGEN COMPOUNDS, ORGANIC SULFUR COMPOUNDS, PHENOLS, POLYPHENOLS, REAGENTS, SULFONIC ACIDS, TRANSITION ELEMENT ALLOYS, TRANSITION ELEMENT COMPLEXES
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