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Dissertations / Theses on the topic 'Zr – 1 %Nb alloy'

Author: Grafiati

Published: 28 May 2022

Last updated: 31 July 2025

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1

Mats, V. O., O. M. Morozov, V. G. Kulish, V. I. Zhurba, O. V. Mats, and S. V. Ivanova. "Effects of Cold Deformation and Electron Irradiations on Deuterium Desorption Temperature Range from Zr – 1 %Nb Alloy." Thesis, Sumy State University, 2013. http://essuir.sumdu.edu.ua/handle/123456789/35123.

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The explored warm-up ranges of desorption ion-implanted deuterium from Zr – 1 %Nb alloy, with different structure: after crystallization from melt, plastic deformation and irradiations electron. Cool deformation under 300 K Zr – 1 %Nb alloy with degree   3.9 has allowed to reach the nanostructure conditions in alloy with average size crystallite d  61 nm, high three-dimensional concentration of the borders (~ 3,4 %) and significant level microstrain that in spectrum of thermodesorption ion-implanted deuterium was shown as additional low temperature area thermodesorption deuterium withi

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2

Materne, Alex. "Elaboration et caractérisation d'alliages amorphes ferromagnétiques doux, Co(1-x)Zr(x) et Co(1-x)(Zr, Nb)x, pour l'application aux têtes intégrées de l'enregistrement magnétique." Grenoble 1, 1987. http://www.theses.fr/1987GRE10131.

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Caracterisation de couches minces cozr et co(zr,nb) deposes par pulverisation cathodique en radio-frequences. Etude de l'anisotropie developpee aux faibles et fortes pressions de depot. Discussion relative a l'origine de ces anisotropies. Etude du controle de la direction et de l'intensite du champ d'anisotropie par application de recuits sous champ magnetique tournant suivis de recuits sous champ magnetique fixe

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3

Dubinskiy, Sergey. "Ti-Nb-(Zr,Ta) superelastic alloys for medical implants : thermomechanical processing, structure, phase transformations and functional properties." Mémoire, École de technologie supérieure, 2013. http://espace.etsmtl.ca/1266/1/DUBINSKIY_Sergey.pdf.

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Le but de ce projet est de développer une nouvelle classe de matériaux d'implants orthopédiques, qui combinerait une excellente biocompatibilité du titane pur avec une compatibilité biomécanique exceptionnelle d'alliages à mémoire de forme Ti-Ni. Les candidats les plus appropriés pour un tel rôle sont les alliages à mémoire de forme Ti-Nb-Zr et Ti-Nb-Ta de type beta métastable. Cette classe de matériaux a été développée tout récemment et l'influence du traitement thermomécanique sur leur structure et leurs propriétés fonctionnelles ne faisaient pas encore objet d'aucune étude approfondie. Par

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4

Botta, Filho W. J. "Mechanical properties of Nb-N, Nb-Zr and Nb-ZrOsub(2) single crystals." Thesis, University of Oxford, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.355724.

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5

Mello, Fabia Zampieri D'Antola de. "Avaliação da biofuncionalidade dos implantes da liga Ti-35Nb-7Zr comparado aos implantes comerciais de Ti-Cp." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/97/97134/tde-20112017-165628/.

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A Ti-35Nb-7Zr é uma liga Ti-ß desenvolvida pelo Grupo de Biomateriais da Escola de Engenharia de Lorena da Universidade de São Paulo, que demonstrou, em estudos anteriores, propriedades mecânicas favoráveis para ser usada como biomaterial, tais como, limite de resistência (~800 Mpa), resistência à corrosão e baixo módulo de elasticidade (33 GPa). Uma vez que o implante dentário traz melhores resultados no tocante à função mastigatória, fonação, conforto e estética, melhorando a qualidade de vida das pessoas, o presente estudo descreve a avaliação da biofuncionalidade dos implantes dentár

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6

Merino, Rafael Alejandro Cajacuri. "Propriedades magnéticas dos compostos de Laves Hf (Fe(1-x)Cr(x))2 e (Nb(1-x)Zr(x)) Fe2." Universidade de São Paulo, 2007. http://www.teses.usp.br/teses/disponiveis/43/43134/tde-23042009-000241/.

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O objeto desta pesquisa consiste em investigar as propriedades estruturais, magnéticas e hiperfinas dos compostos pseudobinários de fases de Laves: Hf(Fe(1-x)Cr(x))2 e (Nb(1-x)Zr(x))Fe2. Para o Hf(Fe(1-x)Cr(x))2, preparamos as amostras como ligas policristalinas e as fundimos por síntese nas concentrações: x = 0,0; 0,1; 0,2; 0,3; 0,4; 0,5; 0,6; 0,7; 0,8; 0,9 e 1,0. O mesmo foi feito para as amostras de (Nb(1-x)Zr(x))Fe2 nas concentrações x = 0,0; 0,1; 0,2; 0,3; 0,4 e 0,5. Todas as amostras fundiram-se num forno de fusão de arco, sob atmosfera de argônio ultrapuro (99.999%). Em seguida investig

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7

Figueira, Luis Carlos Querido. "Um estudo sobre a aplicação da liga Nb-1%Zr em sistemas nucleares espaciais : comportamento sob tratamentos térmicos." Instituto Tecnológico de Aeronáutica, 1991. http://www.bd.bibl.ita.br/tde_busca/arquivo.php?codArquivo=1830.

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O objetivo deste trabalho foi estudar a influência de diferentes tratamentos térmicos na microestrutura da liga Nb-1%Zr. Os corpos de prova foram obtidos a partir de uma barra com aproximadamente 68% de deformação a frio. Antes dos tratamentos térmicos foram feitas medidas de dureza (HRB) em todas as amostras e, ainda, microscopia óptica, fluorescência e difração de RX e análise por EDX em algumas amostras. Adotou-se o seguinte esquema nos tratamentos térmicos: dividiu-se as amostras em 4 grupos de 4 amostras cada; para cada grupo fixou-se uma temperatura de tratamento (entre 1200 e 1500oC) e

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8

Sobol, O. V., A. A. Andreev, and V. Gorban. "Structural-Strained State and Mechanical Characteristics of Single-Phase Vacuum-Arc Coatings of Multicomponent High Entropy System Ti-V-Zr-Nb-Hf and Nitrides Based On It." Thesis, Sumy State University, 2012. http://essuir.sumdu.edu.ua/handle/123456789/34808.

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In this work was shown the high stability of the single-phase structural state of high entropy alloy of Ti-V-Zr-Nb-Hf system in a vacuum-arc method of obtaining of coatings based on it. In the process of deposition single-phase high entropy coatings with bcc-lattice which characterizes the cast state are formed in vacuum, and upon obtaining in a nitrogen atmosphere single-phase nitride superhard coatings based on fcc-metal lattice are formed. Such a stability of structure of multi-element alloy to high temperature evaporation and deposition from high-energy plasma flows allows to use the

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9

O'Mara, Duncan F. "Effect of heating rate to test temperature on superplastic response in an A1-8%Mg-1%Li-0.2%Zr alloy." Thesis, Monterey, California. Naval Postgraduate School, 1989. http://hdl.handle.net/10945/25872.

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The effect of heating rate to tension test temperature on superplastic response in an Al-8%Mg-1%Li-0.2% Zr alloy was studied. A thermomechanical process (TMP) was used that involved warm rolling with controlled reheating between rolling passes. During the TMP, microstructural evolution was controlled by a continuous reaction (CRX). In this work, superplastic response was studied using five heating rates, ranging from 7.1X10-3 C/s to 2.4 x 10+1 C/s, following TMP. Heating rates greater than 10 C/s resulted in a discontinuous reaction (DRX) with a likely coarsening of grain size. Conversely, hig

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10

Templeton, Alan. "Studies of bismuth vanadate (Biâ†4Vâ†2Oâ†1â†1) and BiMeVOX (Me=W'6'+, Ta'5'+, Nb'5'+, Zr'4'+ and Ti'4'+) materials." Thesis, University of Aberdeen, 1996. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU528242.

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The oxide ion conductor bismuth vanadate (Bi<sub>4</sub>V<sub>2</sub>O<sub>11</sub>) can be doped with various metal cations, <I>Me<sup>2+</sup></I> to <I>Me<sup>6+</sup></I>; <I>Me </I>partially substitutes for vanadium to produce a new family of solid electrolytes known as <I>BiMeVOX</I> (<I>Bis</I>muth <I>Me</I>tal <I>V</I>anadium <I>Ox</I>ides. Bi<sub>4</sub>V<sub>2</sub>O<sub>11</sub> is polymorphic having three forms α, β and γ; the high temperature form (γ) has high oxygen ion conductivity of comparable magnitude to existing solid electrolytes such as YSZ; however, this occurs at high t

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11

Schneider, Alexandre Batista. "Voltametria adsortiva na determinação de traços e ultra-traços de Zr(IV), V(V),Ti(IV), Mo(VI), Hf(IV), Nb(V) e Ta(V) em águas naturais." Universidade Federal de Santa Maria, 2014. http://repositorio.ufsm.br/handle/1/4257.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>Single sensitive sequential AdSV methods were developed and optimized for the determination of trace zirconium, vanadium, titanium and molybdenum in river, estuary and seawater, independent of the salinity and content of organic matter in the sample. The methods are based on the accumulation of Zr(IV)-and V(V)-cupferron-oxalic acid-1,3-diphenylguanidine complexes and the accumulation of Ti(IV)-and Mo(VI)-mandelic acid at the hanging mercury drop electrode (HMDE). Differential pulse, adsorption potential of -0.6, -0.2, -0.1 and -0.1

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12

ROCHA, ANA LUIZA DE ANDRADE. "MICROESTRUCTURAL STABILITY OF AL - 2.4 LI - 1.2 CU - 0.6 MG - 1.12 ZR ALLOY (8090) SUBJECTED TO REGRESSION AND REAGING TREATMENTS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2003. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=4311@1.

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CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO<br>O objetivo deste trabalho é avaliar a estabilidade microestrutural da liga 8090 (Al-Li-Cu-Mg-Zr) submetida a tratamentos térmicos de retrogressão e reenvelhecimento em diferentes condições de tempo e temperatura. Caracterização da morfologia e da estabilidade das fases endurecedoras foi realizada por microscopia eletrônica de varredura (MEV), utilizando a técnica EBSD (Electron Backscattering Diffraction). Microscopia eletrônica de transmissão (MET) foi também usada devido a ordem de grandeza nanométrica das fases precipi

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13

NAILI, MOHAMED. "Elaboration et etude des proprietes magnetiques et structurales des couches minces amorphes de co#1##x##yzr#xm#y avec m=zr, nb, ti, pt." Paris 6, 1990. http://www.theses.fr/1990PA066254.

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Cette these est consacree a l'etude des couches minces amorphes d'alliages ferromagnetiques com ou m=zr, ti, nb ou pt est un metal non magnetique. Les echantillons etaient deposes par pulverisation radiofrequence en presence d'un champ magnetique continu applique parallelement au plan du depot. Le travail consistait a determiner les variations de parametres magnetiques de base (aimantation a saturation 4m#s, champ coercitif h#c, anisotropie uniaxiale induite k#u), et les variations de la structure locale en fonction de la composition des alliages ainsi que les parametres de depots tels que la

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14

Zougmoré, François. "Automatisation de mesures de chaleur spécifique : propriétés thermodynamiques à très basses températures des alliages amorphes métalliques supraconducteurs Zr(1-x)Cu(x) préparés par pulvérisation cathodique." Grenoble 1, 1987. http://www.theses.fr/1987GRE10061.

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Technique d'elaboration, caracterisation et etudes structurales "fines" de zr::(1-x)cu::(x). Presentation d'une technique transitoire de mesure de chaleur specifique a tres basse temperature (80 mk-7k). Etude systematique des proprietes thermodynamiques et supraconductrices du systeme a-zr::(100-x)cu::(x) (x=19-20, 20, 27, 32, 38 et 48)

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15

Bououdina, Mohamed. "Étude d'alliages et d'hydrures dérivés des phases de laves ZrCr2(1-x)M2x (M=éléments 3d et molybdène) : Synthèse, études structurale et thermodynamique en relation avec les propriétés de stockage de l'hydrogène." Grenoble 1, 1995. http://www.theses.fr/1995GRE10056.

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Preparation des alliages par induction dans un four hf. Stabilisation des phases par traitements thermiques. Hydrogenation par synthese solide-gaz sous pression. Caracterisation structurale par diffraction aux rayons-x et aux neutrons. Etude des diagrammes p-c-t (pression, composition et temperature). Pour ce faire, un nouveau systeme de controle et de regulation du systeme d'analyse thermogravimetrique completement automatise et assiste par ordinateur a ete mis au point. Modelisation: calcul de la chaleur de formation des solutions solides a partir d'un modele theorique adapte a nos systemes.

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16

Cochrane, Christopher James. "Effect of Process Parameters on Deformation of Zr-2.5wt%Nb Alloy." Thesis, 2013. http://hdl.handle.net/1974/8417.

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Zirconium and its alloys are used extensively in the nuclear industry. In the Canadian Deuterium Uranium reactor, the primary containment in the primary coolant system is composed of Zr-2.5wt%Nb in the form of a pressure tube. The permissible chemical composition of Zr-2.5wt%Nb for use in the pressure tube in nuclear reactors is dictated by ASTMB353. Oxygen and iron are the highest content controlled elements in the standard alloy, after zirconium and niobium. Oxygen is an alpha-stabilizer, and diffuses preferentially to the alpha phase, leading to a well established increase in the yield stre

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17

Shah, Minalben B. "Thermodynamis and kinetics of Zr₅₈̣₅Cu₁₅̣₆Ni₁₂̣₈Al₁₀̣₃Nb₂̣₈ bulk metallic glass forming alloy." Thesis, 2003. http://hdl.handle.net/1957/30229.

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18

Chen, Ying Jie, and 陳盈傑. "The effect of Nb-addition on the thermal stability of rapidly-solidified Al-Cr-Zr alloy." Thesis, 1995. http://ndltd.ncl.edu.tw/handle/69270081130215731330.

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19

Makineni, Surendra Kumar. "Improvement of High Temperature Strength of Al and Co Alloy by L12 Type Coherent Precipitates." Thesis, 2015. https://etd.iisc.ac.in/handle/2005/4348.

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The present work aims at developing a new class of high temperature alloys based on ordered intermetallic compound that forms coherently with the matrix during solid state transformation. The chosen intermetallics have L12 ordered structure, which is a derivative of fcc unit cell. Most popular example of this fcc derivative is Ni3Al that is critical in developing high strength at high temperatures (~900°C) in commercially successful Ni based superalloys. Similar ordered structures form either in stable or metastable form can act as a main strengthening constituent in Al and Co matrices.

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20

Sleiman, Salma. "Study the microsturcture and hydrogenation properties of Ti1V0.9Cr1.1 alloy with addition of Zr." Thèse, 2018. http://depot-e.uqtr.ca/8491/1/032073617.pdf.

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21

Cheng, Yu-te, and 鄭裕德. "The effect of multi-element substitution on the magnetic properties of directly quenched RFeTiMB alloy rods (R = Nd and Pr; M=Nb and Zr)." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/05532902791113654107.

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碩士<br>國立中正大學<br>物理所<br>96<br>In order to simplify the manufacturing process for making isotropic magnet and also improving the magnetic properties, we adopt the copper mold casting method to fabricate permanent magnetic Nd9.5Febal.Ti3-xMxB15(M=Nb and Zr) alloy rods (a diameter of 0.9 mm and 16 mm in length). The cosubstitution of sufficient Ti/Nb and Ti/Zr, respectively, not only led to the finer microstructure, but also improved the exchange coupling effect between the grains of the cast magnet significantly. The optimal magnetic properties of Br=6.6 kG, iHc=9.6 kOe and (BH)max=8.2 MGOe could

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22

Prach, Olena. "Influence of Zr, Cr and Sc alloying on the microstructure and mechanical properties of a Al-Mg-Si casting alloy." Phd thesis, 2021. https://tuprints.ulb.tu-darmstadt.de/17213/1/Thesis.pdf.

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The aim of this work is to investigate the influence of Zr, Cr and Sc alloying elements on a Al-5Mg-2Si-0.6Mn alloy produced using high-pressure die casting technique (HPDC). Previous study has shown a promising improvement of the mechanical properties in die-casting alloys doped with Sc. However, taking into account the high price of the Al-Sc master alloys and of pure Sc (even a small addition of it can increase the price of the alloy significantly), an important motivation of this research is to explore the possibility of full or partial Sc substitution by Zr and/or Cr. Thus, the first part

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