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Dissertations / Theses on the topic '%Nb alloy'

Author: Grafiati

Published: 28 May 2022

Last updated: 31 July 2025

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1

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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2

Zhuravleva, Ksenia. "Porous ß-type Ti-Nb alloy for biomedical applications." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2014. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-147426.

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One of the most important factors for a successful performance of a load-bearing implant for hard tissue replacement is its mechanical compatibility with human bone. That implies that the stiffness should be close to that of a bone and the strength of the implant material must be high enough to bear the load applied under physiological conditions. The Young´s modulus of most of the commonly used biomedical alloys is larger than that of a human bone (around 100 GPa for cp Ti, 112 GPa for Ti-6Al-4V versus 10-30 GPa for cortical human bone). A stiffness reduction of Ti alloys can be achieved by t

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3

Almasi-Kashi, Mohammad. "A magnetic and structural investigation of CoCrPt, Nb alloy thin films." Thesis, University of Salford, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.248913.

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4

Abdelkader, Amr. "Aspects of the electro-deoxidative preparation of Nb-9Hf-1Ti alloy." Thesis, University of Cambridge, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.609598.

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5

Yang, Sen-Shan. "Phase Transformations and Mechanical Behavior of Ternary Nb-15Al- 25Ti Alloy /." The Ohio State University, 1995. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487931512620813.

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6

Kakarlapudi, Purushotham Raju. "High temperature oxidation response of Nb-20W-10Cr alloy in air." To access this resource online via ProQuest Dissertations and Theses @ UTEP, 2008. http://0-proquest.umi.com.lib.utep.edu/login?COPT=REJTPTU0YmImSU5UPTAmVkVSPTI=&clientId=2515.

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7

Ventura, Julieta Angelica. "High temperature oxidation behavior of Nb-20Mo-15Si-5B-20Cr alloy." To access this resource online via ProQuest Dissertations and Theses @ UTEP, 2009. http://0-proquest.umi.com.lib.utep.edu/login?COPT=REJTPTU0YmImSU5UPTAmVkVSPTI=&clientId=2515.

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8

Aleixo, Giorgia Taiacol. "Estabilidade e metaestabilidade de fases em ligas Ti-Nb." [s.n.], 2006. http://repositorio.unicamp.br/jspui/handle/REPOSIP/263173.

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Orientadores: Rubens Caram Junior, Conrado Ramos Moreira Afonso<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecanica<br>Made available in DSpace on 2018-08-06T17:14:04Z (GMT). No. of bitstreams: 1 Aleixo_GiorgiaTaiacol_M.pdf: 13698827 bytes, checksum: 10117398b384c5a1eda6c62fbfc74507 (MD5) Previous issue date: 2006<br>Resumo: Ligas de titânio formam a classe mais versátil de materiais metálicos utilizados para aplicações biomédicas. As ligas de Ti tipo ß usadas em dispositivos ortopédicos envolve, além de excelentes propriedades como baixa densidade

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9

Embong, Zaidi. "A spectroscopic study of the oxidation of uranium and its alloy U-6%Nb." Thesis, University of Bristol, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.443670.

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10

Rios, Orlando. "Examination of the high temperature equilibrium in the Ti-Al-Nb ternary alloy system." [Gainesville, Fla.] : University of Florida, 2009. http://purl.fcla.edu/fcla/etd/UFE0024932.

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11

Zhuravleva, Ksenia [Verfasser], Ludwig [Akademischer Betreuer] Schultz, and Jurgen [Akademischer Betreuer] Eckert. "Porous ß-type Ti-Nb alloy for biomedical applications / Ksenia Zhuravleva. Gutachter: Ludwig Schultz ; Jurgen Eckert." Dresden : Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2014. http://d-nb.info/1068447400/34.

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12

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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13

SONG, HYO-JIN. "PROCESSING PHASE TRANS." University of Cincinnati / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1132249697.

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14

Bönisch, Matthias. "Structural properties, deformation behavior and thermal stability of martensitic Ti-Nb alloys." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-207914.

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Ti-Nb alloys are characterized by a diverse metallurgy which allows obtaining a wide palette of microstructural configurations and physical properties via careful selection of chemical composition, heat treatment and mechanical processing routes. The present work aims to expand the current state of knowledge about martensite forming Ti-Nb alloys by studying 15 binary Ti-c_{Nb}Nb (9wt.% ≤ c_{Nb} ≤ 44.5wt.%) alloy formulations in terms of their structural and mechanical properties, as well as their thermal stability. The crystal structures of the martensitic phases, α´ and α´´, and the influence

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15

Chaumat, Valérie. "Equilibres de phases et microstructures d'alliages Nb-Ti-Al élaborés par mécanosynthèse." Grenoble INPG, 1996. http://www.theses.fr/1996INPG0073.

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L'amelioration des performances des moteurs aeronautiques et de certains dispositifs nucleaires necessite l'augmentation des temperatures de fonctionnement des pieces chaudes en contact avec des milieux dont la temperature peut varier de 900 a 1600c. C'est dans ce contexte que sont etudies les alliages a base de niobium du systeme nb-ti-al. Dans ce systeme, ce travail a cherche a approfondir la connaissance des equilibres de phases, dont dependent les proprietes, ainsi que l'interet technique de l'elaboration par broyage de poudres (mecanosynthese). Deux approches, l'une theorique par la metho

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16

Stanojevic, Sanja [Verfasser], and Ralf [Akademischer Betreuer] Busch. "Processing, crystallization and oxidation of the Ni-Nb(-Sn) refractory alloy glass system / Sanja Stanojevic. Betreuer: Ralf Busch." Saarbrücken : Saarländische Universitäts- und Landesbibliothek, 2013. http://d-nb.info/1053681666/34.

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17

Milanez, Mateus. "Avaliação da resistência ao desgaste da liga mecânica de TixNb obtida por metalurgia do pó." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2015. http://hdl.handle.net/10183/140485.

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Esta dissertação teve como objetivo principal o estudo da produção de peças pelo processo da metalurgia do pó que formaram liga metálica na fase de moagem dos pós metálicos. Para o desenvolvimento do estudo, optou-se pela utilização de pós metálicos de titânio e nióbio, pois a sua interação, reduz a temperatura de transformação da fase Ti- para Ti-, que por sua vez pode ser utilizada em implantes e sistemas de fixação óssea. As concentrações de massa das amostras produzidas por metalurgia do pó foram de 75%Ti/25%Nb e 50%Ti/50%Nb. Inicialmente as amostras foram processadas em um moinho atrito

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18

Caruel, Marie. "Thermomechanical characterization and modeling of shape memory alloys - application on 26at%Nb-Ti." Electronic Thesis or Diss., université Paris-Saclay, 2023. http://www.theses.fr/2023UPAST146.

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Le comportement des alliages à mémoire de forme est piloté par une transformation de phase solide-solide du premier ordre se développant aux échelles microscopiques (échelle du grain ou sub-grain). Grâce à leur comportement atypique (propriété mémoire de forme et pseudo-élasticité), ils sont le candidat privilégié de nombreuses applications. La famille la plus utilisée aujourd'hui est celle des alliages binaires nickel-titane en proportion stœchiométrique. Leur grande capacité pseudo-élastique (déformation réversible de 5% à 10 %) a permis leur utilisation massive dans le domaine du médical. A

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19

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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20

Monobe, Luis Shiguenobu. "Caracterização do envelhecimento da liga 20Cr32Ni+Nb fundida por centrifugação e de seu efeito sobre o comportamento mecânico a frio." Universidade de São Paulo, 2007. http://www.teses.usp.br/teses/disponiveis/3/3133/tde-08012008-155251/.

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Fornos petroquímicos constituem a parte mais importante da indústria de derivados de petróleo. São nesses fornos que se processam as reações químicas imprescindíveis ao processamento dos produtos que constituem nosso cotidiano, como os fertilizantes, polímeros, produtos farmacêuticos e alimentícios. Devido ao caráter fortemente endotérmico dos processos, associado a reações catalíticas provocada numa mistura reacional de vapor de água com hidrocarbonetos (caso da reforma para obtenção de hidrogênio) ou craqueamento por pirólise (processo de pirólise), estes fornos são continuamente aquecidos.

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21

Tang, Zhenghua. "Optimising the transformation and yield to ultimate strength ration of Nb-Ti micro-alloyed low carbon line pipe steels through alloy and microstructural control." Pretoria : [s.n.], 2006. http://upetd.up.ac.za/thesis/available/etd-07212007-110711.

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22

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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23

Sreekanth, Suhas. "Laser-Directed Energy Deposition : Influence of Process Parameters and Heat-Treatments." Licentiate thesis, Högskolan Väst, Avdelningen för svetsteknologi (SV), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:hv:diva-15767.

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Laser-Directed Energy Deposition (L-DED), an Additive Manufacturing (AM) processused for the fabrication of parts in a layer-wise approach has displayed an immense potential over the last decade. The aerospace industry stands as the primary beneficiary due to the L-DED process capability to build near-net-shape components with minimal tooling and thereby producing minimum wastage because of reduced machining. The widespread use of Alloy 718 in the aero-engine application has prompted huge research interest in the development of L-DED processing of this superalloy. AM processes are hindered by

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24

Shrestha, Sachin. "Characterising the effect of Niobium-rich clusters on the microstructure-property relationships in CASTRIP® steels." Thesis, The University of Sydney, 2013. http://hdl.handle.net/2123/10297.

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Many properties of steels, especially those that are important for engineering purposes, are determined by their microstructures. Therefore the key driver to controlling properties of these materials lies within the characterisation and manipulation of their microstructure down to their atomic-scale structure. For industrial product development, strength and ductility are considered to be the most important properties and are highly ‘microstructure sensitive’. This thesis investigates the effect of niobium microalloying and clustering on the microstructure-property relationship of ultra-thin s

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25

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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26

Duncan, Julia Carmel. "Simultaneous oxidation/sulfidation of Cr-Nb alloys." Thesis, Massachusetts Institute of Technology, 1994. http://hdl.handle.net/1721.1/33518.

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27

Moricca, Maria del Pilar. "High temperature oxidation characteristics of Nb-10W-XCr alloys." To access this resource online via ProQuest Dissertations and Theses @ UTEP, 2009. http://0-proquest.umi.com.lib.utep.edu/login?COPT=REJTPTU0YmImSU5UPTAmVkVSPTI=&clientId=2515.

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28

Parga, Clemente José. "Correlation between microstructures and oxidation resistance in Zr-Nb-Ti alloys." To access this resource online via ProQuest Dissertations and Theses @ UTEP, 2009. http://0-proquest.umi.com.lib.utep.edu/login?COPT=REJTPTU0YmImSU5UPTAmVkVSPTI=&clientId=2515.

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29

Morais, Nathanael Wagner Sales. "Influência dos teores de Nb e Zr e do processamento sobre a microestrutura e propriedades mecânicas de ligas U - Nb - Zr." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/3/3133/tde-03052018-092214/.

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Ligas de Urânio são candidatas ao uso como combustível nuclear em reatores avançados, dentre essas ligas se destacam as ligas de Urânio com Nióbio e com Zircônio. Este trabalho investigou como os teores de Nb e Zr, assim como a processamento termomecânico afetam as microestruturas e as propriedades mecânicas de 3 ligas U-XNb-YZr onde X+Y=12. Duas amostras contendo 50g cada, foram fabricadas através de fusão à plasma nos teores U-3Nb-9Zr (liga 39), U- 6Nb-6Zr (liga 66) e U-9Nb-3Zr (liga 93). Uma das amostras de cada liga foi tratada termicamente por 5h a 1000°C para a realização de homogeneizaç

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30

Portillo, Benedict I. "High temperature oxidation behavior of the Nb-W-Cr system and response of boron additions." To access this resource online via ProQuest Dissertations and Theses @ UTEP, 2008. http://0-proquest.umi.com.lib.utep.edu/login?COPT=REJTPTU0YmImSU5UPTAmVkVSPTI=&clientId=2515.

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31

LEAL, JOSE F. "Microssegregacao e tratamentos termicos de homogeneizacao em ligas uranio-niobio (U-Nb)." reponame:Repositório Institucional do IPEN, 1988. http://repositorio.ipen.br:8080/xmlui/handle/123456789/9889.

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32

Dehoff, Ryan R. "Microstructure, Oxidation Behavior And Mechanical Behavior Of Lens Deposited Nb-Ti-Si And Nb-Ti-Si Based Alloys." The Ohio State University, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=osu1221839511.

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33

Amancherla, Sundar. "Modeling of the ordering schemes in B2 Nb-Ti-Al alloys /." The Ohio State University, 2002. http://rave.ohiolink.edu/etdc/view?acc_num=osu1486401895211001.

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34

Abdi, Somayeh, Matthias Bönisch, Steffen Oswald, et al. "Thermal oxidation behavior of glass-forming Ti–Zr–(Nb)–Si alloys." Cambridge University Press, 2016. https://tud.qucosa.de/id/qucosa%3A70755.

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The glass-forming Ti₇₅Zr₁₀Si₁₅ and Ti₆₀Zr₁₀Nb₁₅Si₁₅ alloys composed of nontoxic elements may represent new materials for biomedical applications. For this study, melt-spun alloy samples exhibiting glass–matrix nanocomposite structures were subjected to thermal oxidation treatments in synthetic air to improve their surface characteristics. 550 °C was identified as the most appropriate temperature to carry out oxidative surface modifications while preserving the initial metastable microstructure. The modified surfaces were evaluated considering morphological and structural aspects, and it was fo

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35

Grandini, Carlos Roberto. "Estudo de multi-espectro de relaxação anelástica devido a defeitos intersticiais em ligas de Nb-Zr e Nb-Ti." Universidade de São Paulo, 1988. http://www.teses.usp.br/teses/disponiveis/54/54131/tde-19052009-093713/.

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As medidas de atrito interno tem sido muito usadas para o estudo de relaxações anelásticas devido à intersticiais em metais ou ligas metálicas. Estudou-se o comportamento de ligas de Nb-Zr dopadas com Oxigênio e ligas de Nb-Ti dopadas com Oxigênio e Nitrogênio, através de medidas simultâneas de atrito interno (energia dissipada por oscilação do Pêndulo de Torção) e da dispersão dos valores reativos da constante elástica apropriada. No sistema Nb-Zr-O, o multi espectro de relaxação em função da temperatura foi analisado e foram encontrados processos de relaxação devido à reorientação induzida p

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36

Grandini, Carlos Roberto. "Difusão e relaxação anelástica devido ao hidrogênio em solução sólida em ligas de Nb-Ti e Nb-Zr." Universidade de São Paulo, 1993. http://www.teses.usp.br/teses/disponiveis/54/54131/tde-26032009-103212/.

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Foi estudado o efeito do hidrogênio dissolvido intersticialmente em ligas de nióbio-titânio e nióbio-zircônio. Nas ligas de nióbio-titânio, foram efetuadas medidas de decremento logarítmico por intermédio de medidas de atrito interno em um pêndulo de torção oscilando com freqüência em torno de 4.0 Hz, para amostras puras e dopadas com hidrogênio. Os resultados mostraram a interação do hidrogênio com a matriz metálica através do Efeito Gorsky. Nas ligas de nióbio-zircônio, foram efetuadas medidas de atenuação ultra-sônica para freqüências de 10 e 30 MHz, em amostras puras, contendo hidrogênio e

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37

Souza, Sandra Andreia Stwart de Araujo. "Transformações de fases e correlações microestrutura/propriedades de ligas biocompativeis dos sistemas Ti-Nb e Ti-Nb-Ta." [s.n.], 2008. http://repositorio.unicamp.br/jspui/handle/REPOSIP/265562.

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Orientador: Rubens Caram Junior<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecanica<br>Made available in DSpace on 2018-08-12T05:26:08Z (GMT). No. of bitstreams: 1 Souza_SandraAndreiaStwartdeAraujo_D.pdf: 29406912 bytes, checksum: 599ca950936f4d1a34c07ae03af24fb6 (MD5) Previous issue date: 2008<br>Resumo: Freqüentemente, os implantes femorais falham devido à transferência insuficiente de carregamento a partir da haste metálica para o osso adjacente. Este problema está relacionado à diferença de rigidez entre osso e prótese, que depende em parte de seus m

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38

Xu, Mengyao. "Oxidation Behavior of Nb-Si-Ti-Cr-Al-X Based Multi-Component Alloys." University of Cincinnati / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1155821250.

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39

LEAL, NETO RICARDO M. "Sintese por combustao do NbAl-3 e de ligas do sistema Nb-Ni-Al." reponame:Repositório Institucional do IPEN, 1998. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10661.

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40

Neto, Ricardo Mendes Leal. "Síntese por combustão do NbAl3 e de ligas do sistema Nb-Ni-Al." Universidade de São Paulo, 1998. http://www.teses.usp.br/teses/disponiveis/85/85132/tde-25062012-102602/.

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O NbAl3 e algumas ligas intermetálicas do sistema Nb-Ni-AI foram sintetizadas por combustão a partir dos pós de seus elementos constituintes. O efeito de variáveis de processo, como o tamanho de partícula dos pós, a composição química, a pressão de compactação, o tratamento de desgaseificação e a taxa de aquecimento, foram investigados na síntese do NbAl3 na forma de pastilhas cilíndricas. A síntese de ligas do sistema Nb-Ni-AI foi realizada a partir de misturas com as composições Nb10Ni70AI, Nb20Ni65AI e Nb30Ni60AI. A microestrutura das amostras reagidas foi caracterizada por microscopia ópti

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41

Salvador, Camilo Augusto Fernandes 1988. "Nucleação da fase alfa durante tratamentos isotérmicos em ligas de titânio biomédicas do sistema Ti-Nb e Ti-Nb-Sn." [s.n.], 2015. http://repositorio.unicamp.br/jspui/handle/REPOSIP/265858.

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Orientador: Rubens Caram Junior<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecânica<br>Made available in DSpace on 2018-08-26T12:33:37Z (GMT). No. of bitstreams: 1 Salvador_CamiloAugustoFernandes_M.pdf: 6043299 bytes, checksum: d34b83077b59f31d9349e1c6f8532b3a (MD5) Previous issue date: 2015<br>Resumo: Ligas biomédicas do sistema Ti-Nb-Sn são bastante promissoras em função de sua excelente biocompatibilidade, baixo módulo de elasticidade e resistência à corrosão. Estas propriedades são severamente influenciadas pela precipitação das fases ? e ? dur

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Hu, Jing. "High resolution characterisation of corrosion and hydrogen pickup of Zr-Nb cladding alloys." Thesis, University of Oxford, 2016. http://ora.ox.ac.uk/objects/uuid:a986c6e5-bba4-48c2-8e30-7f77ebe5313e.

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Zr cladding alloys have been used for many years as the first safety barrier layer of a nuclear reactor. However, the recent Fukushima accidents and industrial demands to increase the burnup of fuels have led to increasing interest in a detailed mechanistic understanding of aqueous corrosion and hydrogen pickup and the performance at high temperatures. As part of an international MUZIC-2 programme (Mechanistic Understanding of Zr Corrosion and Hydrogen pickup), I have used a range of advanced microscopy techniques to study the microstructure, the nanoscale chemistry and the porosity in a serie

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Rodriguez, Perez Jessica Marlena 1986. "Refusão superficial por laser de ligas de Ti-Nb sinterizadas." [s.n.], 2015. http://repositorio.unicamp.br/jspui/handle/REPOSIP/265783.

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Orientador: João Batista Fogagnolo<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecânica<br>Made available in DSpace on 2018-08-27T20:13:02Z (GMT). No. of bitstreams: 1 RodriguezPerez_JessicaMarlena_M.pdf: 4283527 bytes, checksum: 428a287377aaab009ef368ca3005561b (MD5) Previous issue date: 2015<br>Resumo: O interesse em ligas do sistema titânio-nióbio para aplicações ortopédicas se deve à excelente resistência mecânica e biocompatibilidade, sendo que o módulo de elasticidade pode ser controlado pelo teor de nióbio. Existem diversos processos que pode

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BARBOSA, LUZINETE P. "Estudo das propriedades e microestrutura de ímãs permanentes de Pr-Fe-B-(Co-Nb) preparados pelo processo de hidrogenação, desproporção, dessorção e recombinação (HDDR)." reponame:Repositório Institucional do IPEN, 2005. http://repositorio.ipen.br:8080/xmlui/handle/123456789/11280.

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Made available in DSpace on 2014-10-09T12:50:14Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T14:02:40Z (GMT). No. of bitstreams: 1 10553.pdf: 9807833 bytes, checksum: fcd7e02a22a70e9ee79a1dcccaf7f496 (MD5)<br>Tese (Doutoramento)<br>IPEN/T<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP

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Wu, Yi-Tzuo, and 吳易座. "The Study of Superplasticity of Ti3Al-Nb Alloy." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/zbqdw2.

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博士<br>國立臺灣大學<br>材料科學與工程學研究所<br>86<br>The ductility of Ti3Al intermetallic alloy can be improved by the addition of Nb element and thermo-mechanical treatment. After annealing, the microstructure of the rolled specimen will turn into the equiaxed grains of (alpha2+beta) dual-phase structure. The grain size of alpha2 phase and the volume fraction of beta phase may be controlled by the annealing conditions, which is the basis of the microstructure design of superplastic deformation. From t

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Huang, Lan. "Microstructural Control and Alloy Design of the Ti-Al-Nb-W-B Alloys." 2008. http://trace.tennessee.edu/utk_graddiss/454.

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The TiAl alloys have been considered as promising candidates for structural-materials applications at around 8000C. The major concern for the structural use of the TiAl alloys is their low ductility and poor fracture resistance at ambient temperature. Refining the grain size of the TiAl alloys can be an effective way to improve the mechanical properties of the alloys. In this work, new TiAl alloys, containing tungsten (W) and boron (B), have been developed. Using the scanning-electron microscopy (SEM), electron-microprobe, and transmission-electron microscopy (TEM), the effects of W and B on t

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Lin, Zhe-hung, and 林哲宏. "Preparation of Nb-doped Titania Nanotube Arrays by Anodizing Sputtered Ti-Nb Alloy Thin Films." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/07421818546217376456.

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碩士<br>國立臺南大學<br>材料科學系碩士班<br>100<br>Recently, TiO2 nanotube array(TNA) films have been widely used in various applications such as like photocatalysis, energy conversion and sensor devices; however, TiO2 with poor conductivity limits the performance of devices. Therefore, scientists try to dope elements for synthesizing TNA films with better conductivity. To date, most of these films have been prepared on Ti foils, which limit the potential applications of TNA films. In this study, we use Nb as a doping element, and Ti-Nb alloy films were deposited on a glass substrate using co-sputtering. We c

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Hong, Yu-Jing, and 洪毓璟. "Characteristics of Ti-Nb-Mo Alloy by Surface Modification." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/51796842823532625666.

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碩士<br>中臺科技大學<br>醫學工程暨材料研究所<br>103<br>Titanium and titanium alloys are widely used in biomedical implants due to their excellent biocompatibility and high corrosion resistance. The previous studies found that Ti-5Nb-5Mo alloy has lower elastic modulus than c.p. Ti and could be developed for biomedical applications. However, it remains a bio-inert material similar with other biomedical titanium alloys. In order to improve the biocompatibility of Ti-5Nb-5Mo alloy, biomimetic modification was performed in this study. We used a peptide to be immobilized on the surface of Ti-5Nb-5Mo alloy by covalen

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Chang, S. W., and 張尚偉. "Preparation of Amorphous Fe-Nb Alloy Powders by Mechanical Alloying." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/43747310714166328907.

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碩士<br>逢甲大學<br>材料科學學系<br>88<br>Amorphous is random state in microstructure, which has some special properties relative crystalline material in engineer apply, such as magnetic, corrosion resistance and mechanical strength. In traditionally, making metal amorphous was by ultra-high cooling rate from high temperature metal vapor or liquid to avoid crystalline when solid reaction happened. Mechanical alloying is a kind of solid state amorphous reaction . The main general idea of mechanical alloying is collision of powder and mill ball. By mill time goes by, the pure metal powders show several proc

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Nelson, Andrew Thomas. "Evaluation of Nb-1Zr and Nb-1Zr-0.1C alloy design parameters for use in space reactor systems." 2004. http://catalog.hathitrust.org/api/volumes/oclc/56828255.html.

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Thesis (M.S.)--University of Wisconsin--Madison, 2004.<br>Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 111-116).

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