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Autore: Grafiati

Pubblicato: 8 giugno 2024

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1

Barcelo, F., A. Alamo e J. Bai. "Caractérisation de l ’orientation des hydrures induite par la contrainte dans un alliage base zirconium". Revue de Métallurgie 90, n. 9 (settembre 1993): 1127. http://dx.doi.org/10.1051/metal/199390091127.

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2

Archambault, P., M. Abrudeanu e B. Colleret. "Influence de l'oxydation et de l'état structural sur les propriétés thermo-physiques d'un alliage à base de zirconium". Journal of Nuclear Materials 200, n. 2 (aprile 1993): 162–68. http://dx.doi.org/10.1016/0022-3115(93)90326-t.

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3

Mardon, J. P., P. Barberis e P. B. Hoffmann. "Un demi-siècle de développement des alliages de zirconium". Revue Générale Nucléaire, n. 4 (luglio 2008): 38–47. http://dx.doi.org/10.1051/rgn/20084038.

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4

Steinmetz, Jean, Michel Vilasi e Bernard Roques. "Oxydation et protection des alliages base niobium". Le Journal de Physique IV 03, n. C9 (dicembre 1993): C9–487—C9–498. http://dx.doi.org/10.1051/jp4:1993952.

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5

Tricot, Roland. "Le zirconium et ses alliages. Métallurgie et applications au génie nucléaire". Revue Générale Nucléaire, n. 1 (gennaio 1990): 8–20. http://dx.doi.org/10.1051/rgn/19901008.

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6

Toffolon, C., J. C. Brachet, T. Guilbert, D. Hamon, S. Urvoy, C. Servant, D. Charquet, L. Legras e J. P. Mardon. "Vieillissement thermique des alliages de zirconium-niobium en phase α (570 °C)". Le Journal de Physique IV 11, PR1 (aprile 2001): Pr1–99—Pr1–108. http://dx.doi.org/10.1051/jp4:2001110.

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7

Godlewski, J., e D. Pêcheur. "Compréhension des cinétiques d'oxydation des alliages de zirconium en milieu aqueux lithié". Le Journal de Physique IV 11, PR1 (aprile 2001): Pr1–119—Pr1–128. http://dx.doi.org/10.1051/jp4:2001112.

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8

Thomazet, J., D. Charquet, P. Billot e H. Amanrich. "Comportement à la corrosion des alliages de zirconium hors et sous irradiation". Revue de Métallurgie 90, n. 9 (settembre 1993): 1086. http://dx.doi.org/10.1051/metal/199390091086.

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9

Tricot, Roland. "Le zirconium et ses alliages dans l'industrie nucléaire. Métallurgie extractive, élaboration et propriétés". Revue Générale Nucléaire, n. 1 (gennaio 1986): 46–54. http://dx.doi.org/10.1051/rgn/19861046.

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10

Halley-Demoulin, I., D. Ciosmak e M. Lallemant. "Oxydation des alliages TiZr sous air et sous oxygène II. Rôle de la composition des alliages sur l'évolution cinétique et morphologique du titane au zirconium". Journal of Alloys and Compounds 204, n. 1-2 (febbraio 1994): 133–43. http://dx.doi.org/10.1016/0925-8388(94)90082-5.

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11

CHARRIN, L., A. COMBE, A. CHARAI e J. CABANE. "Les mécanismes de l'oxydation interne dans les alliages à base d'argent". Le Journal de Physique IV 04, n. C3 (febbraio 1994): C3–127—C3–132. http://dx.doi.org/10.1051/jp4:1994318.

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12

El Kurdi, Moustafa, Emilie Sakat, Jean-Michel Hartmann, Vincent Reboud, Alexei Chelnokov, Nicolas Pauc, Vincent Calvo, Philippe Boucaud e Fréderic Bœuf. "Laser infrarouge à base de semi-conducteurs de la filière silicium". Photoniques, n. 109 (luglio 2021): 40–43. http://dx.doi.org/10.1051/photon/202110940.

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Abstract (sommario):

Nous présentons les récents développements scientifiques et techniques liés aux sources lasers infrarouges en micro-cavités à base d’alliages germanium-étain (GeSn). Ces alliages sont des matériaux semi-conducteurs de la filière silicium compatibles avec les procédés de fabrication bas coût de l’industrie de la micro-électronique. Un des enjeux est d’obtenir un alignement direct de la structure de bande électronique avec ces éléments de la colonne IV.

13

Barberis, P., S. Berbenni e B. Baroux. "Caractérisation des précipités dans les alliages de zirconium par une étude électrochimique dans le domaine cathodique". Revue de Métallurgie 97, n. 5 (maggio 2000): 689–98. http://dx.doi.org/10.1051/metal/200097050689.

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14

Mukhopadhyay, P. "Active Eutectoid Decomposition in Zirconium Base Alloys". Materials Science Forum 3 (gennaio 1985): 247–60. http://dx.doi.org/10.4028/www.scientific.net/msf.3.247.

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15

Tamarin, J. A., E. B. Kachanov e N. V. Zabrodina. "Corrosion à haute température des alliages base aluminiure destinés aux revêtements protecteurs". Materials Science and Engineering: A 120-121 (dicembre 1989): 361–65. http://dx.doi.org/10.1016/0921-5093(89)90788-0.

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16

Tenckhoff, E. "Review of Deformation Mechanisms, Texture, and Mechanical Anisotropy in Zirconium and Zirconium Base Alloys". Journal of ASTM International 2, n. 4 (2005): 12945. http://dx.doi.org/10.1520/jai12945.

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17

Banerjee, S., G. K. Dey, D. Srivastava e S. Ranganathan. "Plate-shaped transformation products in zirconium-base alloys". Metallurgical and Materials Transactions A 28, n. 11 (novembre 1997): 2201–16. http://dx.doi.org/10.1007/s11661-997-0178-3.

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18

Ruch, M., e D. Arias. "transformation in dilute titanium and zirconium base alloys". Scripta Metallurgica et Materialia 24, n. 8 (agosto 1990): 1577–82. http://dx.doi.org/10.1016/0956-716x(90)90435-j.

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19

Fuse, Motomasa. "Analysis of irradiation growth in zirconium-base alloy". Journal of Nuclear Materials 140, n. 2 (settembre 1986): 131–39. http://dx.doi.org/10.1016/0022-3115(86)90240-0.

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20

Sokolov, V. A., E. V. Bogatyreva e M. D. Gasparyan. "State and prospects of development of the raw material base for the production of zirconium materials in the Russian Federation". NOVYE OGNEUPORY (NEW REFRACTORIES), n. 4 (16 settembre 2020): 5–11. http://dx.doi.org/10.17073/1683-4518-2020-4-5-11.

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Abstract (sommario):

Areas of application of zirconium, the main of which are metallurgy, the production of refractories and ceramics are given. The sources of production and distribution of reserves and resources of zirconium dioxide in Russia are indicated. It is noted that Russia, which occupies the fourth place in the world in terms of zirconium reserves, does not have any industrially developed deposits with zirconium production, and Russian consumers are fully working on imported raw materials. The possibility of ensuring the import independence of Russia in zirconium raw materials by commissioning their own explored placer deposits of zirconium and secondary raw materials is shown.

21

Nouicer, El Amine, Hacene Chadli, Mohammed-Hachemi Khireddine, Djamila Khireddine e Lazhar Yahia. "Caractérisation des alliages à base de titane : influence d'un traitement de surface par nitruration". Annales de chimie Science des Matériaux 32, n. 6 (1 novembre 2007): 665–72. http://dx.doi.org/10.3166/acsm.32.675-672.

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22

Guillon, I., C. Servant e O. Lyon. "Étude des déplacements induits par des précipités dans des alliages à base de cuivre". Journal de Physique IV (Proceedings) 118 (novembre 2004): 63–70. http://dx.doi.org/10.1051/jp4:2004118007.

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23

Lachgar, M., L. Durand, A. Altibelli e A. Coujou. "Modélisation par la méthode aux éléments finis de super-alliages biphasés à base nickel." Revue de Métallurgie 91, n. 9 (settembre 1994): 1319. http://dx.doi.org/10.1051/metal/199491091319.

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24

Tricot, Roland. "Résistance à la corrosion des alliages de titane, de zirconium ou de tantale dans les milieux chlorés ou chrorurants". Matériaux & Techniques 75, n. 7-8 (1987): 297–307. http://dx.doi.org/10.1051/mattech/198775070297.

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25

Cline, C. F., L. Jacobson e J. E. Reaugh. "Dynamic Yield Strength of a Zirconium Base Metallic Glass". Le Journal de Physique IV 07, n. C3 (agosto 1997): C3–493—C3–498. http://dx.doi.org/10.1051/jp4:1997385.

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26

Khatkov, V. Yu, G. Yu Boyarko, L. M. Bolsunovskaya, A. M. Dibrov e Yu A. Dibrova. "Russian zirconium industry: current issues in raw material supply". Gornye nauki i tekhnologii = Mining Science and Technology (Russia) 8, n. 2 (13 luglio 2023): 128–40. http://dx.doi.org/10.17073/2500-0632-2023-02-83.

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Abstract (sommario):

The relevance of the research is connected with Russia’s long-term import dependence on zirconium raw materials.Goal of this research: to study the dynamics of commodity flows (production, import, export, consumption) of Russian zirconium raw materials; its prices (world and Russian); the raw material base of zirconium in Russia and the prospects for national production of its extraction and processing.Methods: statistical, graphic, logical.Results: Russia imports the vast majority (3.5–14.9 kt/year or 98–100 % of consumption) of consumed zircon concentrate. At the same time, almost all of the baddeleyite mined in Russia (4.0–9.3 kt/year or (96–100 % of production) is exported. Since 2018 has there been a decrease in its export supplies and an increase in the national consumption (up to 60 % of production).Russia has existing deposits, including a useful zirconium component, but all are connected with a certain economic and technological complexity in their development.In 2022, the national production of selective zircon concentrate began during the development of the Tugan titanium-zirconium deposit. This deposit covers up to 30 % of Russia’s demand for zirconium raw materials up to 2023. Furthermore, the construction of the 2-nd stage of the Tugan mining and processing plant will increase its supply to 15 kt/year. This will completely cover Russian demand for zirconium raw materials. Work is in progress on Zashikhinsky field preparation, where, in the course of enrichment of tantalum-rare-earth ores, up to 8 kt/year of zircon concentrate will be additionally extracted. The emerging trend of reducing Russia’s import dependence on zirconium raw materials, and in the future its complete elimination will allow consumption of zircon and zirconium oxides to be increased in the most demanding area of their use – for dampening the glaze of ceramic tiles. The presence of an independent and sufficient national mining base of zirconium raw materials will allow Russian production of metal zirconium, zirconium refractory and abrasive products, solid fuel energy cells and other zirconiumcontaining applications to be developed.

27

Saida, Kazuyoshi, Hiroyuki Ogiwara e Kazutoshi Nishimoto. "Development of Low Temperature Bonding Technique of Titanium and Zirconium Using Hydrogen Diffusion-Induced Phase Transformation". Materials Science Forum 706-709 (gennaio 2012): 3010–15. http://dx.doi.org/10.4028/www.scientific.net/msf.706-709.3010.

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Abstract (sommario):

A new bonding technique of titanium and zirconium conducted at low temperatures was developed utilizing the hydrogen-induced transformation. Hydrogen charge treatment of the faying surfaces of titanium and zirconium was conducted with varying the charging time between 3.6-700ks prior to diffusion bonding. Diffusion bonding of hydrogen-charged titanium and zirconium was carried out at 600-800°C for 0.6-1.8ks applying the bonding pressure of 5-10MPa in vacuum. Titanium and zirconium hydrides were formed at faying surfaces after hydrogen charge treatment. The β-transus temperature at faying surfaces of titanium and zirconium was reduced to approx. 450-550°C with hydrogen-charging. The bond layer was phase transformed to a bcc structure (β) at the bonding temperature due to the hydrogen diffusion during bonding process. Grain growth across the prior bond interface was observed in the joints bonded at 750-800°C after hydrogen-charging for 300-500ks. Tensile strength of titanium joints bonded at 800°C attained approx. 70% of the base metal strength (approx. 1.6 times as high as non-charged joints), and corrosion resistance of the joints was comparable to that of the base metal. Furthermore, tensile strength of zirconium joints bonded at 800°C was approx. 1.7 times as high as non-charged joints. It follows that the solid-state bondability of titanium and zirconium at low temperatures was improved compared to the conventional diffusion bonding (direct bonding without hydrogen-charging).

28

Molins, R., A. Pineau e E. Andrieu. "Oxydation et propagation des fissures en fatigue-fluage dans des alliages à base de nickel". Le Journal de Physique IV 10, PR4 (marzo 2000): Pr4–259—Pr4–264. http://dx.doi.org/10.1051/jp4:2000436.

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29

Tirand, G., C. Primault e V. Robin. "Sensibilité à la fissuration à chaud des alliages base nickel à haute teneur en chrome". Matériaux & Techniques 102, n. 4 (2014): 403. http://dx.doi.org/10.1051/mattech/2014035.

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30

Bold, Amangul, Larissa Sassykova, Lidiya Fogel, Tigran Vagramyan e Aleksey Abrashov. "Influence of Molybdenum and Tungsten on the Formation of Zirconium Oxide Coatings on a Steel Base". Coatings 11, n. 1 (2 gennaio 2021): 42. http://dx.doi.org/10.3390/coatings11010042.

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Abstract (sommario):

In this paper, we have developed conditions for the deposition of zirconium oxide coatings from solutions containing hexafluorozirconic acid as well as tungsten and molybdenum salts on a steel base. Based on electrochemical studies, it was shown that the addition of tungsten and molybdenum salts to the solution to deposit zirconium oxide coatings led to the inhibition of the anodic process of iron ionization. It was shown that the optimal conditions for the deposition of oxide-zirconium coatings on the surface of steel samples from a solution of 0.2 g/L Zr (IV) + 0.15 g/L W (VI) + 0.1 g/L Mo (VI) were a deposition temperature of 30 °C and time of 10 min. The thickness of the oxide-zirconium coatings formed under these conditions was 64.72 nm, the adhesion value was 3.17 MPa/s, and the corrosion resistance was 26 s according to Akimov’s drop method. The depth of corrosive penetration, determined in the salt fog chamber, did not exceed 2 mm after 240 h of testing, meeting the requirements for adhesive layers under the paintwork.

31

Bajju, Gauri D., Gita Devi, Sapna Katoch, Madhulika Bhagat, Deepmala, Ashu, Sujata Kundan e Sunil Kumar Anand. "Synthesis, Spectroscopic, and Biological Studies on New Zirconium(IV) Porphyrins with Axial Ligand". Bioinorganic Chemistry and Applications 2013 (2013): 1–15. http://dx.doi.org/10.1155/2013/903616.

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Abstract (sommario):

A series of parasubstituted tetraphenylporphyrin zirconium(IV) salicylate complexes (SA/5-SSAZr(IV)RTPP, R = p-H, p-CH3, p-NO2, p-Cl, SA = salicylate, and 5-SSA = 5-sulfosalicylate) have been synthesized, and the spectral properties of free base porphyrins, their corresponding metallated, and axially ligated zirconium(IV) porphyrin compounds were compared with each other. A detailed analysis of ultraviolet-visible (UV-vis), proton nulcear magnetic resonance (1H NMR) spectroscopy, infrared (IR) spectroscopy, and elemental analysis suggested the transformation from free base porphyrins to zirconium(IV) porphyrins. The ability of the metal in this complex for extra coordination of solvent molecules was confirmed by ESI-MS spectra. Besides the fluorescence, cyclic voltammetry, and thermogravimetric studies, the complexes were also screened for antimicrobial and anticancer activities. Among all the complexes, 5-SSAZr(p-NO2TPP) shows high antibacterial activity.

32

Feng, Lin Ping, Bin Chen, Pei Ying Liu, Tie Tao Zhou e Huan Xi Li. "The Microstructures and Their Stability of β Base Mg-13Li-X Alloys". Materials Science Forum 488-489 (luglio 2005): 239–44. http://dx.doi.org/10.4028/www.scientific.net/msf.488-489.239.

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In the present work Mg-Li-X alloys with different alloying are investigated and the studies are focus on the stability of microstructures and properties of β base Mg-13Li-X alloys. The alloying elements concerned are aluminum, zinc, zirconium, rare earth. The microstructure and corresponding mechanical properties are examined with the aid of DSC analyses, X-ray diffraction and OM observation. The results showed that the hardening effect and the stability of the alloys varied with different addition of aluminum, zinc, zirconium, rare earth elements. The mechanical properties of the alloys greatly depend on the additional elements.

33

Dey, G. K., E. G. Baburaj, S. Banerjee e P. Ramachandrarao. "Glass Forming Abilities and Crystallization in Zirconium Base Metallic Glasses". Key Engineering Materials 13-15 (gennaio 1987): 329–32. http://dx.doi.org/10.4028/www.scientific.net/kem.13-15.329.

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34

Grant, Lauren N., Balazs Pinter, Jun Gu e Daniel J. Mindiola. "Molecular Zirconium Nitride Super Base from a Mononuclear Parent Imide". Journal of the American Chemical Society 140, n. 50 (3 dicembre 2018): 17399–403. http://dx.doi.org/10.1021/jacs.8b11198.

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35

Taluts, N. I., e A. V. Dobromyslov. "The formation of the orthorhombic martensite in zirconium-base alloys". Journal de Physique IV (Proceedings) 112 (ottobre 2003): 1099–102. http://dx.doi.org/10.1051/jp4:20031074.

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36

Cronin, Jon A., Sharon M. Palmer e Ronald D. Archer. "Eight-coordinate Schiff-base zirconium polymers: synthesis, characterization and properties". Inorganica Chimica Acta 251, n. 1-2 (ottobre 1996): 81–87. http://dx.doi.org/10.1016/s0020-1693(96)05255-3.

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37

Dudnik, E. V., Z. A. Zaitseva, A. V. Shevchenko e L. M. Lopato. "Methods of formation of zirconium dioxide-base dispersed powders (review)". Powder Metallurgy and Metal Ceramics 32, n. 8 (agosto 1993): 669–74. http://dx.doi.org/10.1007/bf00559805.

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38

FUSE, Motomasa, Yusuke ISOBE e Noriyuki SADAOKA. "Computing System for Evaluating Material Behaviors of Zirconium-Base Alloys". Journal of Nuclear Science and Technology 31, n. 12 (dicembre 1994): 1287–93. http://dx.doi.org/10.1080/18811248.1994.9735291.

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39

Dai, Ruxi, e Paula L. Diaconescu. "Investigation of a zirconium compound for redox switchable ring opening polymerization". Dalton Transactions 48, n. 9 (2019): 2996–3002. http://dx.doi.org/10.1039/c9dt00212j.

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40

Ri, Kh, E. Kh Ri, M. A. Ermakov e E. D. Kim. "Features of formation of the Al–Ni–Zr system alloy structure obtained by reducing oxide compounds by aluminothermy using SHS metallurgy". Izvestiya. Non-Ferrous Metallurgy, n. 4 (21 agosto 2023): 24–34. http://dx.doi.org/10.17073/0021-3438-2023-4-24-34.

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Abstract (sommario):

This work is focused on establishing the regularity of the effect of zirconium (2.21; 3.29; 3.69 and 6.92 wt.% Zr) on structure formation, the nature of distribution of elements and the microhardness of structural components in the Al–Ni–Zr system alloys obtained by aluminothermy using the SHS metallurgy. Regularities of the formation of structural components and their microhardness depending on the content of zirconium in Al–Ni alloys (50 wt.%) have been identified and scientifically substantiated. Structural components were identified by the methods of electromicroscopic studies and X-ray microanalysis of elements. The structure of the initial alloy consists of Al3Ni2 (β′-phase) and Al3Ni nickel aluminides. Zirconium doping of the alloy in the amount of 2.21 wt.% leads to crystallization of zirconium nickel aluminide Al2(Ni,Zr). With further increase in the content of zirconium (more than 2.21 wt.% Zr), complex alloyed intermetallic compounds crystallize – Zr, W, Si aluminides and Ni zirconides. A regularity was established in the decrease of the solubility of nickel in nickel aluminides Al3Ni2 and Al3Ni and their microhardness as the zirconium content increases in the Al–Ni–Zr alloys from 2.21 to 6.92 wt.%. In nickel aluminide with zirconium Al2(Ni,Zr), this contributes to a decrease in the solubility of Ni, Al and increase in the concentration of Si and Zr. Zirconium doping of the Al–Ni alloy in the amount over 2.21 wt.% contributes to an increase in hardness (HRA), despite a decrease in the microhardness of the metal base (Al3Ni2, Al3Ni and Al2(Ni,Zr)). The main reason for increasing the hardness of the Al–Ni–Zr alloys is the crystallization of complex-alloyed intermetallides – Zr, W, Si aluminides and nickel zirconide, which probably have an increased microhardness. Thus, zirconium doping of the Al–Ni alloy makes it possible to obtain a plastic metal base from nickel aluminides Al3Ni2, Al3Ni and Al2(Ni,Zr) and complex-alloyed intermetallides with high hardness.

41

Francillette, H., B. Bacroix e M. Gasperini. "Utilisation de différents modèles de passage micro-macro pour la prévision des mécanismes de déformation actifs dans les alliages de zirconium." Revue de Métallurgie 91, n. 9 (settembre 1994): 1312. http://dx.doi.org/10.1051/metal/199491091312.

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42

Bagegni, Aimen, Justus Borchers, Samuel Beisel, Sebastian B. M. Patzelt, Kirstin Vach e Ralf Kohal. "Bonding Strength of Various Luting Agents between Zirconium Dioxide Crowns and Titanium Bonding Bases after Long-Term Artificial Chewing". Materials 16, n. 23 (24 novembre 2023): 7314. http://dx.doi.org/10.3390/ma16237314.

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Abstract (sommario):

The use of hybrid abutment crowns bonded extraorally to a titanium bonding base has aesthetic and biological benefits for the prosthetic rehabilitation of oral implants. The objective of this study was to evaluate the effects of luting agents between a zirconium dioxide crown and the titanium bonding base on crown/abutment retention and the subsequent durability of the prosthetic superstructure. Fifty-six implant abutment samples, all restored with a lower first premolar zirconium dioxide crown, were used and divided into seven groups (n = 8/group) according to the type of luting agent used: group 1, SpeedCEM Plus; group 2, Panavia SA Cement Universal; group 3, Panavia V5; group 4, RelyX Unicem 2 Automix; group 5, VITA ADIVA IA-Cem; group 6, Ketac CEM; and group 7, Hoffmann’s Phosphate Cement. All specimens were subjected to thermomechanical loading (load of 49 N, 5 million chewing cycles and 54.825 thermocycles in water with temperatures of 5 °C and 55 °C). The surviving samples were exposed to a pull-off force until crown debonding from the bonding base. Overall, 55 samples survived the thermomechanical load. Group 2 showed the highest mean pull-off force value (762 N), whereas group 6 showed the lowest mean value (55 N). The differences between the seven groups were statistically significant (ANOVA, p < 0.001). The debonding failure pattern was mainly adhesive and was noticed predominantly at the zirconium dioxide–luting agent interface. Within the scope of the present investigation, it was shown that most of the luting agents are suitable for “cementation” of a zirconium dioxide crown onto a titanium base since the debonding forces are above a recommended value (159 N).

43

Ding, Rui Xian, Sheng Zhong Kou, Jian Jun Fan e Ye Jiang. "Effect of Raw Material Purity on Structure and Properties of Metallic Glasses". Materials Science Forum 1035 (22 giugno 2021): 759–67. http://dx.doi.org/10.4028/www.scientific.net/msf.1035.759.

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Abstract (sommario):

Zirconium base metallic glasses [Zr0.73(Cu0.59Ni0.41)0.27]87Al13 was fabricated by industrial zirconium with low purity and high purity zirconium according to different quality ratios in order to study the effect of raw material purity on the structure and properties of metallic glasses. The results showed that the complete metallic glasses was failed to be fabricate with low purity zirconium. And the compression process was typical brittle fracture with low compressive strength and without plastic strain. The glasses forming ability of low purity zirconium metallic glass with different purity was significantly improved after the addition of yttrium element. The compression experiments showed that the compressive strength and plasticity of metallic glasses were improved, and the microhardness was also increased. It indicates that yttrium element can eliminate the adverse effect of impurity in low purity zirconium on the glasses forming ability of the alloy and improve the structural properties of the metallic glasses.

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Mykhailov, V. "HIGHLY PROSPECTIVE OBJECTS OF THE MINERAL AND RAW MATERIAL BASE OF UKRAINE. PART 1. METALLIC MINERALS". Visnyk of Taras Shevchenko National University of Kyiv. Geology, n. 1 (100) (2023): 73–85. http://dx.doi.org/10.17721/1728-2713.100.09.

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A short description of the highly promising mineral and raw material base of metallic minerals of Ukraine is provided. It includes the following deposits and occurrences: complex carbonatite rare metal-apatite Novopoltavske deposit (REE, Nb, Ta, P2O5); complex zirconium-rare-earth-niobium Mazurivske (Oktyabrske) deposit (REE, Zr, Nb); complex rare earth-zirconium Azovske deposit (REE, Zr); Anadolske rare earth deposit (REE); rare earth occurrences Petrovo-Hnutivske (RZE) and Balka Korabelna (RZE); placer complex ilmenite-zirconium deposits Malyshevske (Ti, Zr) and Tarasivske (Ti, Zr); indigenous complex rare-earth-zirconium Yastrubetske deposit (REE, Zr); Shevchenkivske deposit of spodumene ores (Li); Polokhivske deposit of petalite ores (Li); Stankuvatske deposit of spodumene-petalite ores (Li); manifestation of Kruta Balka (Li); Zhovtorichenske complex iron-uranium-vanadium-scandium deposit (Sc, Fe, U, V); coal of the Donetsk basin (Ge). Among the metallic minerals of Ukraine, these deposits have the highest level of investment attractiveness, the lowest investment risks, are characterized by an average level of competition and can be recommended as priority objects for investment in their study and industrial development. To determine the investment prospects of specific objects, a preliminary geological and economic assessment of the feasibility and profitability of their industrial development is necessary.

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Pernot, M., e F. Montheillet. "Archéométallurgie du formage : le martelage des alliages à base de cuivre à l’époque protohistorique. Premiers résultats". Revue de Métallurgie 91, n. 5 (maggio 1994): 849–61. http://dx.doi.org/10.1051/metal/199491050849.

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Li, Lan, Yuan Yuan Song, Guang Ren Geng e Fu Tian Liu. "Preparation of Zirconium Sol by Precipitation Method". Solid State Phenomena 281 (agosto 2018): 52–57. http://dx.doi.org/10.4028/www.scientific.net/ssp.281.52.

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Zirconium sol was prepared using precipitation method. In the process, ZrO(OH)2 precipitate was firstly obtained through the addition of strong base into the zirconium ions, and then was washed to remove the chloride ion. Lastly, the obtained ZrO(OH)2 precipitate was dissolved in nitric acid solution to obtain the white mixed solution. The clear and transparent zirconium sol can be obtained after heated the white mixed solution in a water bath. In this study, the effects of three precipitating agents on the properties of zirconium sol were studied. Zirconium sol prepared by using ammonia as precipitating agent is easy to peptize, while its viscosity is very high. On the other hand, zirconium sol prepared by using urea as precipitating agent exhibits low solid content. Notably, the performance of zirconium sol prepared using ammonia and NH4Cl solution as precipitating agent is best due to its low viscosity and high solid content. In addition, zirconium sol, xerogel and zirconium dioxide powder prepared using ammonia and NH4Cl solution as precipitating agent were systematically characterized by SEM, viscometer, XRD, FTIR. The optimal zirconium sol was synthesized using a peptizing time of 8 h under a peptizing temperature was 80 °C, and the dried amorphous xerogel was converted to tetragonal ZrO2 after calcined at 600 °C, while monoclinic at 1000 °C.

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Sharma, M., J. Tripathi, A. Mishra, S. N. Jha, A. K. Yadav e B. D. Shrivastava. "X-ray Absorption Fine Structure Studies of Zirconium Complexes". Advanced Science, Engineering and Medicine 11, n. 11 (1 novembre 2019): 1093–96. http://dx.doi.org/10.1166/asem.2019.2455.

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Zirconium complexes derived with Schiff-base ligands take a central role in the expansion of coordination chemistry and have been receiving huge attention due to its pharmacological, dental and industrial characteristics. The present research paper deals with the characterization of Zirconium complexes with X-ray absorption spectroscopy (XAS) at Zirconium K-edge. Characterization was done at BL-9 EXAFS beamline available at Indus-2 synchrotron radiation source (2.5 GeV, 125 mA), Raja Ramanna Centre for Advanced Technology, Indore (M.P.), India. Both X-ray absorption near edge structure (XANES) and Extended X-ray absorption fine structure (EXAFS) techniques were used to explore out the local environment around the Zirconium complexes. A computer software package IFEFFIT was used to analyze physical parameters. Edge width reveals that complexes have octahedral geometry and chemical shifts of complexes from zirconium metal reveals oxidation state of Zirconium in their complexes. The bond length of first coordinating shell of the complexes has been determined by Fourier transform method and compares this bond length with different methods.

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S, Udayashankar, e V. S.Ramamurthy. "Development and Characterization of Al6061-Zirconium Dioxide Reinforced Particulate Composites". International Journal of Engineering & Technology 7, n. 3.12 (20 luglio 2018): 128. http://dx.doi.org/10.14419/ijet.v7i3.12.15901.

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Particulate reinforced Aluminium based metal matrix composites are widely used in aerospace, defense, marine and space applications because their excellent properties such as high strength, high stiffness, high corrosion resistance, high fatigue resistance, high wear resistance etc., In the present work Aluminum Alloy Al6061-Zirconium dioxide composites were developed by stir casting technique by varying the percentage of Zirconium dioxide in steps of 3% up to 12%.The samples were prepared as per ASTM standards for microstructure study, tensile strength and hardness properties. The microstructure studies carried using optical microscope revealed the presence of Zirconium dioxide particulates in the Aluminium matrix. Also it revealed the uniform distribution of Zirconium dioxide in the Aluminium matrix and no voids and porosity were present in the matrix. The tensile strength and hardness properties were more than the base metal aluminium alloy. The tensile strength and hardness properties were increased with the increase in percentage of Zirconium dioxide up to 9% and decreased there afterwards. The optimum value for hardness and tensile strength of the composite was obtained at 9% of Zirconium dioxide.

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Kanter, Daniel, Yves Bolender, Christophe Rapin e Marie-Pierryle Filleul. "L’effet mémoire de forme est-il une réalité clinique pour le 35° Copper Ni-Ti® ? Étude par calorimétrie différentielle à balayage". L'Orthodontie Française 84, n. 3 (settembre 2013): 259–69. http://dx.doi.org/10.1051/orthodfr/2013057.

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Introduction : Les alliages à base de nickel-titane-cuivre sont censés exprimer un effet mémoire de forme : refroidis en phase basse température puis soumis à une déformation apparemment plastique, ils devraient retrouver leur forme initiale par simple réchauffage en phase haute température. Les alliages à base de nickel-titane peuvent présenter différentes phases cristallographiques : martensite, austénite et une phase intermédiaire inconstante, la phase R. L’effet mémoire de forme est généralement associé à la transformation de martensite en austénite mais il peut aussi accompagner la transformation de phase R en austénite. Les températures buccales n’étant pas compatibles avec un alliage totalement martensitique, la présente étude vise, pour le 35° Copper Ni-Ti®, à rechercher la présence de phase R aux températures buccales et donc la possibilité d’exploiter l’effet mémoire de forme de la phase R en clinique. Matériels et méthodes : Trente fils 35° Copper Ni-Ti® provenant de deux lots distincts ont été consécutivement examinés par calorimétrie différentielle à balayage en cycles partiels, limités aux températures rencontrées dans la cavité buccale (de 0 °C à 50 °C). La présence d’une phase cristallographique intermédiaire a été recherchée sur les thermogrammes. Les températures de transformation ont été déterminées et les deux lots ont été comparés par le test U de Mann et Whitney. Résultats : Au chauffage, tous les fils sont passés directement de martensite en austénite. Af (moyenne = 33,5 °C, écart-type = 0,8 °C) était généralement inférieure à la température indiquée par le fabricant et une différence statistiquement significative (p ≤ 0,01) a été observée entre les deux lots. Conclusions : La présence de phase R n’a pas été détectée et les températures de transformation n’étaient pas constantes. Cette étude met en question la réalité clinique d’un effet mémoire de forme pour les fils 35° Copper Ni-Ti®.

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Sadaoka, Noriyuki, e Motomasa Fuse. "Effects of Microstructural Factors on Irradiation Growth in Zirconium-Base Alloys". Transactions of the Japan Institute of Metals 29, n. 12 (1988): 970–76. http://dx.doi.org/10.2320/matertrans1960.29.970.

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