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Dissertations / Theses on the topic 'Zr-Cu'

Author: Grafiati

Published: 7 July 2024

Last updated: 31 July 2025

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1

Carrasco, Valenzuela Wilson Rodrigo. "Cristalización de Aleaciones Amorfas Cu – Zr – Al." Tesis, Universidad de Chile, 2009. http://www.repositorio.uchile.cl/handle/2250/103378.

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El estudio de las aleaciones amorfas ha cobrado importancia en la actualidad debido a las singulares propiedades físicas y mecánicas que éstas presentan, como una alta resistencia a la corrosión y buena resistencia mecánica. Recientes estudios efectuados a aleaciones metálicas amorfas de CuZr muestran que éstas poseen ductilidades superiores a otras aleaciones amorfas. El mecanismo de deformación plástica en vidrios metálicos involucra la formación de bandas de corte, y la presencia de nanocristales juega un papel importante en dicho proceso. En el presente trabajo se estudió la cristalizac

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2

Xu, Min. "Crystallization of Zr₂Pd(subscript x)Cu(₁₋(subscript x)) and Zr₂Ni(subscript x)Cu(₁₋(subscript x)) metallic glass." [Ames, Iowa : Iowa State University], 2008.

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3

Абдулов, А. Р. "Термодинамические свойства расплавов Cu-Ti-Zr, Cu-Ni-Ti, Cu-Fe-Ti и моделирование их склонности к аморфизации". Дис. канд. хім. наук, Донбасская государственная машиностроительная академия, 2008.

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4

Ismail, Nahla. "Electrochemical Hydrogen Absorption by Zr-Cu-Al-Ni Metallic Glasses." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2002. http://nbn-resolving.de/urn:nbn:de:swb:14-1037185293084-48289.

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Effect of electrochemical absorption of hydrogen has been studied on the Zr-based amorphous alloys. The influence of hydrogen absorption on the stability of the amorphous phase and its crystallisation was investigated. Additionally, the cathodic hydrogen reaction mechanism on the surface of the alloy, the reversibility of the absorbed hydrogen and the hydrogen diffusion in the alloy were studied. These alloys are able to absorb large amounts of hydrogen (&gt;1:1 hydrogen to metal ratio) but a rearrangement of the amorphous matrix takes place so that Cu rich areas are detected on the surfac

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5

Casas, Gómez Camilo Andrés. "Simulación Dinámica Molecular de Aleaciones Amorfas de Cu-Zr-Al." Tesis, Universidad de Chile, 2010. http://www.repositorio.uchile.cl/handle/2250/102475.

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6

Kosiba, Konrad. "Flash-Annealing of Cu-Zr-Al-based Bulk Metallic Glasses." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-222874.

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(Bulk) metallic glasses ((B)MGs) are known to exhibit the highest yield strength of any metallic material (up to 5GPa), and show an elastic strain at ambient conditions, which is about ten times larger than that of crystalline materials. Despite these intriguing mechanical properties, BMGs are not used as structural materials in service, so far. The major obstacle is their inherent brittleness, which results from severe strain localization in so-called shear bands. MGs fail due to formation and propagation of shear bands. A very effective way to attenuate the brittle behaviour is to incorporat

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7

Nekouie, Vahid. "Deformation behaviour of a Zr-Cu-based bulk metallic glass." Thesis, Loughborough University, 2017. https://dspace.lboro.ac.uk/2134/25246.

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While inelastic mechanical behaviour of crystalline materials is well-understood in terms of lattice defects, bulk metallic glasses (BMGs) pose significant challenges in this respect due to their disordered structure. They can be produced by rapid cooling from the liquid state (among other technique) and, thus can be frozen as vitreous solids. Due to the absence of a long-range order in atomic structure and a lack of defects such as dislocations, BMGs generally show unique mechanical properties such as high strength and elastic limit, as well as good fracture toughness and corrosion resistance

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8

Frigerio, Jean-Marc. "Densités d'états électroniques d'alliages métalliques amorphes Cu-y, Cu-Zr déterminées par spectroscopie optique et d'électrons." Paris 6, 1986. http://www.theses.fr/1986PA066184.

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Alliages constitués d'un métal à bande d remplie Cu et d'un métal de début de transition y ou Zr. Etude de l'influence du remplissage de la bande 4d sur la stabilité et la structure électronique des alliages amorphes. Comparaison de la relaxation structurale des deux types d'échantillons par calorimétrie différentielle à balayage et par diffusion centrale de rayons x. Etude de l'absorption optique et de la contribution des transitions interbandes. Les mesures de photoémission et de photoémission inverse confirment les résultats optiques.

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9

Maria, Felipe Henrique Santa. "Análise térmica da influência do oxigênio na amorfização de ligas baseadas em Cu-Zr." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/18/18158/tde-23052018-105250/.

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Os vidros metálicos baseados em Cu-Zr representam uma classe bastante promissora para a categoria de materiais estruturais, tendo em vista suas interessantes propriedades resultantes da natureza amorfa. Sabe-se que o oxigênio tem grande influência na formação da estrutura amorfa e consequentemente nas propriedades dessa classe de materiais. No presente trabalho, ligas amorfas baseadas em Cu-Zr foram analisadas termicamente a fim de se observar o comportamento das mesmas frente à contaminação com oxigênio. As análises térmicas foram realizadas em um equipamento de calorimetria exploratória dife

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10

Pauly, Simon. "Phase formation and mechanical properties of metastable Cu-Zr-based alloys." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2010. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-39545.

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In the course of this PhD thesis metastable Cu50Zr50-xTix (0≤ x ≤ 10) and (Cu0.5Zr0.5)100-xAlx (5 ≤ x ≤ 8) alloys were prepared and characterised in terms of phase formation, thermal behaviour, crystallisation kinetics and most importantly in terms of mechanical properties. The addition of Al clearly enhances the glass-forming ability although it does not affect the phase formation. This means that the Cu-Zr-Al system follows the characteristics of the binary Cu-Zr phase diagram, at least for Al additions up to 8 at.%. Conversely, the presence of at least 6 at.% Ti changes the crystallisation

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11

Khorashadizadeh, Anahita [Verfasser]. "Microstructure characterization of ultra-fine grained Cu-0.17wt%Zr / Anahita Khorashadizadeh." Aachen : Hochschulbibliothek der Rheinisch-Westfälischen Technischen Hochschule Aachen, 2012. http://d-nb.info/1029489432/34.

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12

Aleman, Omar Jimenez. "Deposition and characterization of magnetron sputtered coatings in the Zr-Cu-JN and Zr-li-JN(B) ternary systems." Thesis, University of Sheffield, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.521963.

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13

Asgharzadeh, Javid Fatemeh. "Phase formation, martensitic transformation and mechanical properties of Cu-Zr-based alloys." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-210276.

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Die Motivation zur Untersuchung ternärer und quaternären CuZr-Legierungen bestand in der Annahme, dass die Zugabe von Kobalt den Stabilitätsbereich von B2 CuZr bis zur Raumtemperatur erweitert und Aluminium einen signifikanten Effekt auf die Glasbildungsfähigkeit des CuZr-Systems hat. Die vorliegende Dissertation befasst sich mit der Herstellung und Charakterisierung von Cu50-xCoxZr50 (0 ≤ x ≤ 20) und Cu50-xCoxZr45Al5- (x = 2, 5, 10 und 20) Legierungen. Hierbei wurden die Phasenbildung, die thermische Stabilität, die Mikrostruktur, die Martensitbildung und die mechanischen Eigenschaften der Le

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14

Fernández, Urrutia Rubén Marcos. "Recubrimientos de Cu-Zr-Al Amorfos Producidos Mediante Técnicas de Aspersión Dinámica." Tesis, Universidad de Chile, 2010. http://www.repositorio.uchile.cl/handle/2250/102309.

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15

Hendrichs-Troeglen, Nicolas Jorge. "Consolidation structures and properties of rapidly soldified Cu-Cr-Zr alloy powders." Thesis, University of Sheffield, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.319440.

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16

Gomiero, Philippe. "Microstructure et propriétés mécaniques de l'alliage Al-Li-Cu-Mg(Zr) (2091)." Grenoble INPG, 1990. http://www.theses.fr/1990INPG0129.

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L'objectif de ce travail est de correler l'evolution de la microstructure a l'evolution des proprietes mecaniques d'un alliage al-li-cu-mg (zr), type 2091, a l'etat sous revenu, en les comparant aux alliages modeles al li et al cu mg. Une etude fine de la microstructure de l'alliage a ete effectuee par microanalyse x, diffusion centrale en rayon x, microcalorimetrie et microscopie electronique en transmission. Elle a mis en evidence: i) une phase grossiere r en quantite non negligeable, qui diminue la teneur en solutes par rapport a la composition initiale; ii) une phase al#3li spherique de st

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17

Déo, Leonardo Pratavieira. "Verificação da precisão de um critério para a seleção de composições formadoras de vidro em ligas metálicas do ternário Zr-Ni-Cu." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/88/88131/tde-14122011-142544/.

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No presente trabalho verificou-se a precisão de um critério que prevê composições de ligas vítreas aplicado ao sistema Zr-Ni-Cu. Este critério combina o parâmetro de instabilidade topológica (\'lâmbda\'), e o parâmetro termodinâmico (\'delta\' h) entre os elementos de liga. Os dois parâmetros correlacionam quantitativamente à composição química a tendência à formação de vidros metálicos. Este critério é uma ferramenta promissora e simples para guiar e reduzir o trabalho tedioso e intensivo de encontrar composições altas tendências a vitrificação em sistemas metálicos. Para comprovar a eficiênc

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18

Poblano-Salas, Carlos A. "The microstructure and properties of consolidated water atomised Cu-Cr-Zr alloy powders." Thesis, University of Sheffield, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.425174.

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19

Berezina, A. L., N. N. Budarina, A. V. Kotko, O. A. Molebny, A. A. Chayka, and A. Y. Ischenko. "Structural changes in friction-stir welded Al-Li-Cu-Sc-Zr (1460) alloy." Thesis, Sumy State University, 2011. http://essuir.sumdu.edu.ua/handle/123456789/20580.

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Structure and properties of Al-2.3%Li-3%Cu-0.1%Sc-0.1%Zr (1460) were studied after FSW on thin cold-rolled sheets with the thickness of 2mm. Sheets were aged in the T8mode. During FSW, severe plastic deformation and material flow occurs at the temperature lower than melting temperature. Welding was performed at the tool rotation speed 2880 rps. The tool was moved along the weld joint at the constant speed 16m/h. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/20580

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20

MAIS, LAURA. "Electrodeposition of Nb, Ta, Zr and Cu from Ionic Liquid for Nanocomposites Preparation." Doctoral thesis, Università degli Studi di Cagliari, 2015. http://hdl.handle.net/11584/266571.

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Multilayer metal materials with nanometric scale are important in modern engineering applications. Composite materials based on metals with different characteristics give rise to new materials with unique properties. Among the others, nanostructured composites constituted by immiscible metals can present interfaces able to control defects produced by high doses of radiation, stress and temperature: their properties can be exploited in nuclear power reactor. Immiscible systems constituted by Cu/Nb or Cu/Ta multilayers exhibit higher thermal stability and improved mechanical properties with resp

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21

Gaganov, Alexander. "Hochfeste und hochleitfähige Cu-Ag-Leitermaterialien." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2010. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-62066.

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Die Cu – Ag - Mikroverbund – Werkstoffe besitzen das Potenzial die gegensätzlichen Anforderungen an das Leitermaterial für den Einsatz in einem Hochfeldmagneten, wie hohe Festigkeit bei gleichzeitig hoher elektrischen Leitfähigkeit und ausreichender Verformbarkeit, zu erfüllen. Außerdem bieten diese Werkstoffe gegenüber den anderen, die dafür in Frage kommen können, den großen technologischen Vorteil einer konventionellen schmelzmetallurgischen Herstellung. Jedoch wurde bisher dafür eine sehr aufwändige Technologie verwendet, die die Herstellung des Leitermaterials nur im Labormaßstab ermöglic

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22

Laffont, Paul. "Comportement à la rayure de verres métalliques massifs base CuZr." Electronic Thesis or Diss., Université Grenoble Alpes, 2024. http://www.theses.fr/2024GRALI018.

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La structure amorphe des verres métalliques (VM) leur confère des résistances mécaniques hors du commun. Elle est également à l'origine des mécanismes de déformations plastiques qui leur sont spécifiques et qui se traduit par la localisation spatiale de la déformation menant à la création et la propagation de bandes de cisaillement. L'impact de ces mécanismes de déformation reste néanmoins encore mal connu concernant les sollicitions mécaniques complexes, il est par exemple très difficile de prédire les évolutions de l'usure d'un VM dans un système complexe et donc sa durée de vie qui est inti

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23

Bicker, Matthias. "Strukturelle Änderungen in dünnen amorphen Zr-Al-Ni-Cu- und Ta-Si-N-Schichten." [S.l. : s.n.], 2000. http://deposit.ddb.de/cgi-bin/dokserv?idn=960137440.

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24

Sun, Kou María del Rosario, and Sagrario Mendioroz. "Preparación y propiedades de montmorillonitas pilaradas con Zr y su interacción con Cu(II)." Revista de Química, 2013. http://repositorio.pucp.edu.pe/index/handle/123456789/100753.

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25

Cataldo, Laurent. "Contribution à l'élaboration et à l'optimisation d'alliages magnétiques permanents Sm-Co-Cu-Fe-Zr." Lyon 1, 1996. http://www.theses.fr/1996LYO10206.

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L'etude concerne l'elaboration d'alliages sm-co-fe-cu-zr utilises pour la fabrication d'aimants permanents. L'objectif poursuivi a ete une optimisation des proprietes magnetiques a travers la mise au point des conditions d'elaboration. Les aimants permanents a base de co-sm-cu-fe et zr sont encore actuellement les seuls materiaux susceptibles de travailler a haute temperature (300\c) sans alteration notable de leurs proprietes magnetiques (temperature de curie, coercitivite elevee, produit energetique 28mgoe). Le processus d'elaboration de ces alliages est complexe et comporte trois etapes : u

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26

Rahioui, Ahmed. "Contribution à l’Étude microstructurale des effets d'implantation d’espèces métalliques (Cu,Zr,Fe) dans l'alumine." Lyon, INSA, 1993. http://www.theses.fr/1993ISAL0046.

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L'implantation ionique est un traitement envisagé pour l'amélioration des propriétés de surface des matériaux, notamment les céramiques. Elle permet de modifier fondamentalement les microstructures superficielles. Notre travail a porté sur l'implantation à forte concentration d'espèces métalliques (Cu, Zr, Fe) dans une alumine polycristalline. Les espèces ont été choisies en raison de la diversité de leur valence et de la stabilité de leurs oxydes avec l'alumine. Plusieurs techniques complémentaires ont permis la caractérisation microstructurale de la couche implantée en fonction des paramètre

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27

Mechler, Stefan. "Die Rolle der ikosaedrischen Nahordnung bei Glasbildung und Kristallisation im System Zr-Ti-Ni-Cu-Be." [S.l.] : [s.n.], 2007. http://opus.kobv.de/tuberlin/volltexte/2007/1539.

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28

Pavlenyi, Marc. "Effects of short range order on structural and transport properties of Cu-Ni-Zr amorphous alloys." Thesis, McGill University, 1990. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=59379.

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The effects of short range order on the structural and transport properties of the $ rm Cu sb{1-x}Ni sb{x}Zr sb2$ amorphous metallic alloy system are studied. Depending on composition, these amorphous alloys crystallize into different structures. CuZr$ sb2$ has the I4/mmm (C11) structure and NiZr$ sb2$ has the I4/mcm (C16) structure. It is believed that the short range order in the amorphous phase is related to the final crystalline phase. A careful study (using differential scanning calorimetry, X-ray diffraction on as made and crystallized states, room temperature magnetic susceptibility and

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29

Davin, Laury F. "Ultra-fine characterisation of nanostructures in Al-(Li)-Cu-Mg-(Zr) alloys by three-dimensional atom probe." Thesis, University of Oxford, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.408822.

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30

Verdu, Catherine. "Origines microstructurales et modélisation de l’Amorçage des fissures inter granulaires d'un alliage Al-Li-Cu-Mg-(Zr)." Lyon, INSA, 1991. http://www.theses.fr/1991ISAL0012.

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Le travail réalisé porte sur l'analyse des mécanismes microscopiques de la rupture inter granulaire des alliages Al. Li. Cu. Mg. (Zr). Par une méthodologie expérimentale originale, nous avons montré que la rupture dans ces alliages est liée à leur mode de déformation plastique particulier. En effet, on observe qu'une seule famille de plans. De glissement est principalement activée, en raison d'une texture cristallographique marquée, et du cisaillement des précipités Al Li. Il s'en suit des incompatibilités de déformation entre les grains qui entraînent une localisation de la déformation près d

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31

Bolam, Vivienne Jane. "The influence of surface treatments on the fatigue properties of an AL-LI-CU-MG-ZR (8090) alloy." Thesis, University of Southampton, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.315087.

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32

Xiaofeng, Gu. "Preparation, glass forming ability, crystallization and deformation of (Zr, HF)-CU-NI-AL-TI based bulk metallic glasses." Available to US Hopkins community, 2003. http://wwwlib.umi.com/dissertations/dlnow/3080671.

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33

Ritter, Yvonne [Verfasser], Karsten [Akademischer Betreuer] Albe, and Gerhard [Akademischer Betreuer] Wilde. "Molecular Dynamics Simulations of Structure-Property Relationships in Cu-Zr Metallic Glasses / Yvonne Ritter. Betreuer: Karsten Albe ; Gerhard Wilde." Darmstadt : Universitäts- und Landesbibliothek Darmstadt, 2012. http://d-nb.info/1106256514/34.

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34

Marques, Paulo Wilmar Barbosa. "Relaxação estrutural em ligas vítreas e parcialmente cristalizadas do sistema Cu-Zr-Al através da técnica de espectroscopia mecânica." Universidade Federal de São Carlos, 2013. https://repositorio.ufscar.br/handle/ufscar/4965.

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Made available in DSpace on 2016-06-02T20:15:29Z (GMT). No. of bitstreams: 1 5591.pdf: 65197476 bytes, checksum: 0562626136c2cda8c961be66e989832e (MD5) Previous issue date: 2013-11-08<br>Universidade Federal de Sao Carlos<br>In recent years the study of bulk metallic glasses (BMG) is being of great scientific and technological interest due to their unique properties (the lack of long range atomic order in the structure and compositional homogeneity similar to the liquid state). These alloys show better mechanical properties, superior corrosion resistance, high yield stress and fracture tough

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35

Mackie, Alexander J. "Spark Plasma Sintering as a powder processing route for pre-alloyed Sm2(Co, Fe, Cu, Zr)17 permanent magnets." Thesis, University of Sheffield, 2017. http://etheses.whiterose.ac.uk/21654/.

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The ’rare earth crisis’ that occurred in 2011 ignited research into mitigating and replacing the dependence on these elements in Rare Earth Permanent Magnets (REPM) and their applications. It is the former that this body of work is based upon. A method of increasing the bulk resistivity of a REPM, Sm(Co, Fe, Cu, Zr)8.2 (henceforth referred to as Sm2(Co, Fe, Cu, Zr)17), through the addition of an electrically insulating material, CaF2, to form a rare earth composite permanent magnet is studied. The aim of increasing the bulk resistivity is to minimise the irreversible demagnetisation and perfor

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36

Vilela, Marcio Maia. "Medidas de poder de freamento de Si, Ti, V, Cu, Zn, Zr e Pd utilizando ions 14N e 16O." Universidade de São Paulo, 1986. http://www.teses.usp.br/teses/disponiveis/43/43131/tde-08112013-145930/.

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Foram medidas as perdas de ernergia de íons 14N e 16O em sólidos (Si,Ti,V,Cu,Zn, Zr e Pd) na faixa de energias de 1 MeV/uma. A técnica utilizada constitui-se na medida de energia de projéteis espalhados a 25° por um alvo delgado de Au, antes e depois de atravessar a folha do element freador. Os resultados experimentais são comparados com as previsões semi-empíricas de Northcliffe & Schilling (N&S), Ziegler e uma nova versão de N&S feita por Hubert e colaboradores, sendo observada uma razoável concordância entre os valores medidos e as curvas semi-empíricas.<br>Energy loss has been measured

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37

Krzelowski, Mirosław. "Analiza struktury faz Laves'a Nb (Cu, Al, X) 2 (X = Ni, Co, Cr, Ti i Zr) metodą krystalografii elektronowej." Doctoral thesis, Katowice : Uniwersytet Śląski, 2008. http://hdl.handle.net/20.500.12128/5130.

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Aktualnie prowadzone badania w różnych ośrodkach naukowych związane z poszukiwaniem coraz to bardziej wytrzymałych i odpornych na degradację termiczną materiałów wskazują jednoznacznie, że jednym z właściwych kierunków badań jest zainteresowanie się materiałami, których struktura zawiera fazy międzymetaliczne. Fazami takimi są ponad wszelką wątpliwość fazy Laves’a, które stwarzają dodatkowe możliwości znacznej poprawy różnych charakterystyk tych materiałów, nie powodując jednocześnie pogorszenia innych pożądanych właściwości. Przykładem są tu stopy typu Cu-Al-Nb wykazujące pamięć kształtu w p

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38

Lin, Pin-Chen, and 林品辰. "High-Temperature Oxidation Behavior of Cu-Zr Binary and Zr-Cu-Al Ternary Bulk Metallic Glasses." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/94418180036321475320.

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碩士<br>國立臺灣海洋大學<br>材料工程研究所<br>98<br>The oxidation behabior of three Cu-Zr based bulk metallic glasses, containing Cu64.5Zr35.5 (CZ2), Zr50Cu43Al7 (CZA7) and Zr50Cu40Al10 (CZA10) and their crystalline counterparts was studied over the temperature range of 400oC ~ 500oC in dry air. In general, the oxidation kinetics of three glassy alloys followed the two- to three-stage parabolic-rate law, indicating that diffusion is the rate-determining step during oxidation. The oxidation rate constants (kp values) gradually increasing with temperature for CZ2, but fluctuating with temperature for both CZA7

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39

Liu, Chih-Hua, and 柳智華. "Zr-Cu-Ni Phase Diagram at 800℃." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/35921417714601195951.

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碩士<br>國立中山大學<br>材料科學研究所<br>92<br>Zirconium base alloys have very good metallic glass forming ability. In this study,the Zr-Cu-Ni ternary isotherm at 800℃ were determined by using metallography,electron-probe microanalysis and X-ray diffraction.The main objective is to provide the necessary information for alloy design to form new Zr-base with better glass forming ability.

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Chen, Chih-jung, and 陳致榮. "Preparation and Characterization of Sputtered Zr-Ti and Zr-Cu Thin Film Metallic Glasses." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/2sepbs.

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Chen, Bo-Jyun, and 陳柏均. "Determination of the amorphous regions of the Cu-Zr-Ag ternary system and the phase equilibria of Cu-Zr-Ag, Cu-Al-Ag ternary systems at 500oC." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/23320511711154954591.

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碩士<br>國立臺灣科技大學<br>材料科學與工程系<br>100<br>Bulk metallic glasses (BMGs) have attracted many interests in recent years because their strong mechanical properties, excellent corrosion resistance and good permeability. Zr-Cu based systems have high glass-forming ability (GFA)while Ag is easy to obtain. In this study, Cu-Zr-Ag alloys with different compositions were prepared, and the BMGs were produced by arc melting and copper mold. For comparison, the phase equilibria of Cu-Zr-Ag and Cu-Al-Ag ternary systems was investigated at 500oC. As the result, the best glass-forming ability (GFA) was obtained by

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"Estudo da degradação dos eletrodos Cu/Zr e Cu/Cr/Zr utilizados na soldagem de aços revestidos com Zn e liga Zn-Fe." Tese, Biblioteca Digital de Tese e Dissertação da UFF, 1998. http://www.bdtd.ndc.uff.br/tde_busca/arquivo.php?codArquivo=1397.

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Kosiba, Konrad. "Flash-Annealing of Cu-Zr-Al-based Bulk Metallic Glasses." Doctoral thesis, 2016. https://tud.qucosa.de/id/qucosa%3A30262.

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(Bulk) metallic glasses ((B)MGs) are known to exhibit the highest yield strength of any metallic material (up to 5GPa), and show an elastic strain at ambient conditions, which is about ten times larger than that of crystalline materials. Despite these intriguing mechanical properties, BMGs are not used as structural materials in service, so far. The major obstacle is their inherent brittleness, which results from severe strain localization in so-called shear bands. MGs fail due to formation and propagation of shear bands. A very effective way to attenuate the brittle behaviour is to incorporat

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Zhang, Yi-zong, and 張益綜. "Zr-based and Zr-Cu based Glass-forming Films for Fatigue-property Improvements of 7075-T6 Aluminum Alloy." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/98008095198122246510.

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碩士<br>國立中央大學<br>機械工程研究所<br>99<br>We proposed with the Zr-based and Zr-Cu based metallic glass thin film (MGTF) as promising coating for aluminum alloy fatigue property enhancement. According to the four-point-bending fatigue results, 7075-T6 aluminum alloy with a 200-nm-thick Zr-based MGTF improved its fatigue life cycle 22 times at a stress level of 250 MPa than the bare one. And the other fatigue life cycle of Zr-Cu based MGTF is further improved 44 times which ups to 107 cycles. The improvements of MGTF coating samples in fatigue limit were 235 MPa (56.7 % increase) and 250 MPa (66.7 % incr

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Shih, Chih-Hsiung, and 施志雄. "The measurement of Ti-Zr-Cu-Ni phase diagram at 800℃." Thesis, 1995. http://ndltd.ncl.edu.tw/handle/76998752147969416797.

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Yang, Ta-Kai, and 楊達凱. "Effect of Sn addition on the Cu-Zr-Ti amorphous alloys." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/a2863n.

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碩士<br>大同大學<br>材料工程學系(所)<br>93<br>This study examined the effect of Sn element addition on the Cu-Zr-Ti amorphous alloys by mechanical alloying technique. The microstructural evolution during mechanical alloying of the mixed powders was investigated by both X-ray diffraction and scanning electron microscopy (SEM).The phase stabilities of the as-milled powders were studied by DSC measurement. According to the result, after 5 hours of milling, the composition of Cu-Zr-Ti-Sn alloys were all amorphization. The thermal stability of the Cu-Zr-Ti-Sn amorphous powder was also investigated by differenti

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Kao, Pei-Chin, and 高佩琴. "The Oxidation Behavior of Cu-Zr-Al-Ag Bulk Metallic Glasses." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/97446194829799000309.

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碩士<br>國立臺灣海洋大學<br>材料工程研究所<br>97<br>The oxidation behavior of three Cu-Zr based bulk metallic glasses, containing Cu45Zr45Al5Ag5 (CZ45-BMG), Cu43Zr43Al7Ag7 (CZ43-BMG), and (Cu43Zr43Al7Ag7)99.5Si0.5(CZ43S-BMG) was studied over the temperature range of 375 – 500oC in dry air. The oxidation kinetics of the three glassy alloys generally followed a multi-stage parabolic-rate law, and the steady-state parabolic-rate constants (kp values) fluctuated with temperature. It was found that kp values increased with increasing temperature, when it was below the supercooled region, however, those values dec

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Yang, Man-Ning, and 楊曼寧. "Fabrication and Thermal Properties of Diamond/Cu-Zr Electronic Packaging Composites." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/55661231363056225199.

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Tsai, Jian-Cheng, and 蔡建丞. "Sutdy on Zr-based amorphous alloys roll bonding with Cu sheet." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/k4p8z9.

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碩士<br>義守大學<br>材料科學與工程學系<br>106<br>Amorphous alloys have excellent mechanical properties, but it lack of ability of plastic deformation and dutility at room temperature. In order to improve these disadvantage, there are many methods that can improve the properties have been developed. For example, thermal treatments, adding of elements, rolling and so on. Zr53Cu30Ni9Al8, this bulk metallic glasses has good glass forming ability, its γm is about 0.739 and wide supercooled liquid region, its ΔTx is about 80K. In this study, for research the working ability of bulk metallic glasses at room tempera

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Xie, Sujing. "Plastic Deformation and Annealing of Zr- and Cu- Based Bulk Metallic Glasses." 2007. http://etd.utk.edu/2007/XieSujing.pdf.

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