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Dissertations / Theses on the topic 'Aluminides'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

Stejskal, Pavel. "Reakční syntéza objemových intermetalických materiálů z kineticky nanášených depozitů." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2013. http://www.nusl.cz/ntk/nusl-230855.

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This work deals with issues of preparation of intermetallics based on iron, nickel and titanium aluminides. It works with an idea of preparation of bulk material by reaction synthe-sis from kinetic spraying deposits by cold spray. Theoretical part is concerned with phases and compounds of these aluminides for structural applications, their characteristics and present fabrication. In experimental part there are studied microstructures created by annealing of deposits.

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2

Butler, Catherine J. "The solidification characteristics of titanium aluminides." Thesis, University of Nottingham, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.294701.

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3

Fu, Eliana Koon Yee. "Production of titanium aluminides by powder metallurgy." Thesis, Imperial College London, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.286396.

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4

Cam, Gurel. "The alloying of titanium aluminides with carbon." Thesis, Imperial College London, 1990. http://hdl.handle.net/10044/1/47794.

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5

Mahaffey, David Wanton. "Characterization of Lens deposited 3AMMA titanium aluminides." The Ohio State University, 2001. http://rave.ohiolink.edu/etdc/view?acc_num=osu1407399490.

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6

Mercer, Christopher. "Fatigue and fracture of gamma titanium aluminides /." The Ohio State University, 1996. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487936356160854.

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7

PRIARONE, PAOLO CLAUDIO. "Advances in machinability of gamma titanium aluminides." Doctoral thesis, Politecnico di Torino, 2013. http://hdl.handle.net/11583/2509904.

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Gamma titanium aluminides (γ-TiAl) have received an increasing industrial and academic attention in recent years. Due to their attractive combination of properties, they have been evaluated as important contenders for structural applications in the automotive and aerospace sectors, especially for the components simultaneously subjected to mechanical and thermal stresses. These heat-resistant intermetallic alloys show significantly lower density in comparison to nickel-based superalloys, high strength/weight ratio, high temperature strength, and good oxidation and fatigue resistance. At the sam

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8

O'Reilly, Keyna A. Q. "The nucleation and growth of transition metal aluminides." Thesis, University of Oxford, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.306035.

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9

Fan, Yangyang. "Precipitation Strengthening of Aluminum by Transition Metal Aluminides." Digital WPI, 2015. https://digitalcommons.wpi.edu/etd-dissertations/209.

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A castable alloy, i.e., one that flows easily to fill the entire mold cavity and also has resistance to hot tearing during solidification, must invariably contain a sufficient amount of a eutectic structure. For this reason, most traditional aluminum casting alloys contain silicon because the aluminum-silicon eutectic imparts to the alloy excellent casting characteristics. However, the solidus temperature in the Al-Si system does not exceed 577Â°C, and the major alloying elements (i.e., zinc, magnesium, and copper) used with silicon in these alloys further lower the solidus temperature. Also,

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10

Fan, Yangyang. "Precipitation Strengthening of Aluminum by Transition Metal Aluminides." Digital WPI, 2012. https://digitalcommons.wpi.edu/etd-theses/231.

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Aluminum-zirconium alloys exhibit superior strength at elevated temperature in comparison to traditional aluminum casting alloys. These alloys are heat-treatable and their strength depends to a large extent on the quenching and aging steps of the heat treatment process. However, measurements show that the critical cooling rate necessary to retain 0.6 wt. pct. zirconium(the minimum amount necessary for significant strengthening) in a super-saturated solid solution with aluminum is 90ºC/s, which is un-attainable with traditional casting processes. On the other hand, the critical cooling rate nec

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11

Sumathy, Arumuganathar. "Fatigue and fracture of high strength titanium aluminides." Thesis, University of Birmingham, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.532170.

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The effects of thermal exposure on the bulk microstructure and surface properties of a duplex gamma alloy with a nominal composition of Ti-45AI-8Nb-0.2C (atomic percent) have been studied at temperatures of 750°C for exposure times of 500 and 1000 hrs. The microstructure of this alloy was found not to be stable under such exposure. Additional phases were observed to precipitate. Tensile properties were, however, not altered by the formation of these additional phases, although, these additional phases appear to have some influence on the room temperature fracture toughness and fatigue crack gr

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12

Cisloiu, Roxana. "Computational modeling of hydrogen embrittlement of iron aluminides." Morgantown, W. Va. : [West Virginia University Libraries], 2001. http://etd.wvu.edu/templates/showETD.cfm?recnum=1910.

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Thesis (M.S.)--West Virginia University, 2001.<br>Title from document title page. Document formatted into pages; contains vii, 93 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 71-75).

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13

Xydas, Nicholas Kevin. "Pressureless sintering of high density tri-iron aluminide (Fe3A1)." Thesis, London South Bank University, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.369886.

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14

Gouma, Pelagia-Irene. "Characterisation of gas-atomised powders of [gamma]-titanium aluminides." Thesis, University of Birmingham, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.537887.

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Gas-atomised powders of the Ti-48A1-2Nb-2Mn system have been produced from ingot material using the IRC facility and these powders have been examined before and after a range of HIPping treatments. The as-atomised powders and consolidated samples have been examined using optical microscopy, analytical scanning, transmission electron microscopy, and XPS spectroscopy. Some property measurements have been carried out on HIPped samples. The structure of the powders was, as expected, a function of particle diameter, with small particles (below 40μm diameter) showing the largest fraction of retained

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15

Triantafillou, Jim Carleton University Dissertation Engineering Mechanical and Aerospace. "The Creep behaviour of lamellar near gamma-titanium aluminides." Ottawa, 1996.

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16

Kaviani, Saeid. "Processing, structure and properties of ordered iron-transition metal aluminides." Thesis, University of Sheffield, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.286875.

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17

Schmidt, Torsten. "Saturated bonds and anomalous electronic transport in transition-metal aluminides." Doctoral thesis, Universitätsbibliothek Chemnitz, 2006. http://nbn-resolving.de/urn:nbn:de:swb:ch1-200601769.

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Diese Arbeit beschäftigt sich mit den besonderen elektronischen Eigenschaften der Übergangsmetall-Aluminide. In Anlehnung an die Quasikristalle und ihre Approximanten zeigt sich, dass selbst Materialien mit kleinen Einheitszellen die gleichen überraschenden Effekte aufweisen. So gibt es unter den Übergangsmetall-Aluminiden auch semimetallische und halbleitende Verbindungen, auch wenn sie aus klassisch-metallischen Komponenten wie Fe, Al oder Cr bestehen. Diese Eigenschaften sind außerdem mit einem tiefen Pseudogap bzw. Gap in der Zustandsdichte und starken kovalenten Bindungen gekoppelt. Bind

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18

Piers, Newbery A. "Electric arc spray forming of nickel alloys and nickel aluminides." Thesis, University of Oxford, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.359486.

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19

Okabe, Toru H. "A Fundamental Study on Refining of Titanium and Its Aluminides." Kyoto University, 1992. http://hdl.handle.net/2433/74621.

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20

García, Pastor Francisco Alfredo. "Micromechanical behaviour of two-phase (α[2] + γ) titanium aluminides". Thesis, University of Manchester, 2009. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.508929.

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21

Ye, Fan. "Intrinsic and extrinsic modification of niobium aluminides and molybdenum disilicide composites /." The Ohio State University, 1997. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487947908401111.

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22

Seletskaia, Tatiana. "Calculation of thermal expansion of iron-aluminides with transition metal additives." Morgantown, W. Va. : [West Virginia University Libraries], 2002. http://etd.wvu.edu/templates/showETD.cfm?recnum=2684.

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Thesis (Ph. D.)--West Virginia University, 2002.<br>Title from document title page. Document formatted into pages; contains vi, 103 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references.

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23

Kourtis, Lampros. "Electron beam melting of titanium aluminides : process development and material properties optimisation." Thesis, University of Sheffield, 2017. http://etheses.whiterose.ac.uk/18002/.

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Additive Manufacturing (AM) process development was conducted to the production of high- Niobium Titanium Aluminide components with properties suitable for structural aerospace applications. Computational analysis of experimental data from statistically designed experiments and numerical heat source modelling revealed the effect of key Electron Beam Melting (EBM) process parameters on the melting response of ?- Titanium Aluminides. Dimensionless terms for melt pool depth and operational parameters for various literature data and experimental data from this study show a very good fitting; which

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24

Lee, Jongsub. "A study of weld fusion zone phenomena in cast gamma titanium aluminides /." The Ohio State University, 1995. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487864485228894.

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25

Mallory, Louise Caithness. "A study of weld heat-affected zone phenomena in cast gamma titanium aluminides /." The Ohio State University, 1996. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487942182324556.

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26

Kim, Sung Joon Nicolet Marc-A. Nicolet Marc-A. "I. Ion-solid interactions with markers. : II. Oxidation phenomema in silicides and aluminides /." Diss., Pasadena, Calif. : California Institute of Technology, 1988. http://resolver.caltech.edu/CaltechETD:etd-11062007-081348.

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27

Janda, Daniel [Verfasser], and M. [Akademischer Betreuer] Heilmaier. "Mechanical properties and oxidation behavior of micro-alloyed iron aluminides / Daniel Janda. Betreuer: M. Heilmaier." Karlsruhe : KIT-Bibliothek, 2015. http://d-nb.info/1068263407/34.

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28

Chandio, Ali Dad. "Processing, characterisation and oxidation study of the nickel aluminides (βNiAl) for thermal barrier coating applications". Thesis, University of Manchester, 2015. https://www.research.manchester.ac.uk/portal/en/theses/processing-characterisation-and-oxidation-study-of-the-nickel-aluminides-nial-for-thermal-barrier-coating-applications(36f4ed36-5df2-47ab-bf0f-6ecaab19d9f4).html.

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Superalloys used in aeroengines are designed to offer superior strength at increasingly higher operating temperatures. In order to optimise the working efficiency and provide additional protection to the components such as turbine blades; a thermal barrier coating (TBC) system is applied. The TBC is a multilayer system consisting of mainly two layers i.e. bond coat (BC) and topcoat (TC). In addition, a third layer grows between the TC and BC during oxidation known as a reaction layer or thermally grown oxide (TGO). The function of the TC (usually, yttria stabilised zirconia (YSZ)) is to provid

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29

Ahmed, Toseef. "Phase transformations in Ti-Al-V alloys based on titanium aluminides Tiâ†3Al and TiAl." Thesis, Imperial College London, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.338841.

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30

Po-Sri, Chatuporn. "Elevated temperature crack growth in inertially welded nickel-based superalloys and gamma based titanium aluminides." Thesis, University of Birmingham, 2011. http://etheses.bham.ac.uk//id/eprint/1432/.

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An evaluation of inertia friction welds in RR1000 has been conducted through microtensile and sustained load crack growth tests on pre-cracked testpieces. As-welded and two post weld heat treatment conditions have been considered. The fatigue crack growth behaviour of γ TiAl has also been considered, with a focus on establishing fatigue crack growth thresholds.

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31

Wang, Shiyuan. "Fatigue crack threshold and growth behaviour in a near fully-lamellar gamma based titanium aluminides." Thesis, University of Birmingham, 2015. http://etheses.bham.ac.uk//id/eprint/6347/.

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Fatigue crack threshold (\(D\)K\(_{th}\)) and fatigue crack growth of a near fully-lamellar \(y\)-TiAl alloy (Ti-4522XD alloy) have been investigated in air at room temperature, 400, 650, 700 and 750 oC and at three R ratios (0.1, 0.5 and 0.8). Studies were carried out on both corner-cracked specimens and smooth specimens. A combination of a \(D\)K- increasing loading method and growing a crack from notch were applied throughout the tests. As a consequence of consistent material microstructure, use of standardized testing procedure and a sufficient number of tests, some trends in fatigue thres

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32

Janda, Daniel [Verfasser], and Martin [Akademischer Betreuer] Heilmaier. "Mechanical properties and oxidation behavior of micro-alloyed iron aluminides / Daniel Janda. Betreuer: M. Heilmaier." Karlsruhe : KIT-Bibliothek, 2015. http://nbn-resolving.de/urn:nbn:de:swb:90-461256.

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33

Wiezorek, J. M. K. "A TEM study of defect microstructures in the intermetallic titanium aluminides γ-TiAl and α2-Ti-3Al". Thesis, University of Cambridge, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.309707.

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34

Vailhé, Christophe N. P. "Deformation mechanisms in B2 aluminides: shear faults and dislocation core structures in FeAl, NiAl, CoAl and FeNiAl." Diss., Virginia Tech, 1996. http://hdl.handle.net/10919/38075.

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35

Emdadi, Aliakbar [Verfasser]. "High-Temperature Deformation Behavior of Intermetallic Titanium and Iron Aluminides Produced by Spark Plasma Sintering / Aliakbar Emdadi." Düren : Shaker, 2021. http://d-nb.info/1235301117/34.

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36

Vailhé, Christophe N. P. "Deformation mechanisms in B2 aluminides : shear faults and dislocation core structures in FeAl, NiAl, CoAl and FeNiAl /." This resource online, 1996. http://scholar.lib.vt.edu/theses/available/etd-06062008-154448/.

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37

Duff, S. L. "Investigation into the effect of surface conditions and environment on the high temperature fatigue response of titanium aluminides." Thesis, Swansea University, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.636746.

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The low cycle fatigue response of TiAl-45-2-2-XD has been assessed at a temperature of 650°C. Plain specimens were provided with various surface finishes: as machined, pre-oxidised, Electro-Chemi-Milled (ECM), ECM plus polish and non standard ECM. A Gleeble machine was also used to produce thermal shock resistance specimens for testing. The resulting fatigue data, however, demonstrates that the S/N response is not influenced by surface treatment, or, by thermal cycling. This lack of sensitivity to surface condition suggests that the surface, and hence fatigue crack initiation, may not be impor

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38

Vishweswaraiah, Srinivas. "NON-DESTRUCTIVE MICROSTRUCTURAL EVALUATION OF YTTRIA STABILIZED ZIRCONIA, NICKEL ALUMINIDES AND THERMAL BARRIER COATINGS USING ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY." Master's thesis, University of Central Florida, 2004. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/4463.

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There has been an urge for increasing the efficiency in advanced gas turbine engines. To fulfill these needs the inlet gas temperatures should be increased in the gas turbine engines, thermal barrier coatings (TBCs) have gained significant applications in increasing the gas inlet temperatures. Insulating characteristics of ceramic TBCs allow the operation at up to 150~250 °C higher gas temperatures. Because of the severe turbine engine operating conditions that include high temperature, steep temperature gradient, thermal cycling, oxidation and hot-corrosion, TBCs can fail by spallation at

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39

Klein, Thomas [Verfasser]. "Wet chemical synthesis of nano and submicron Al particles for the preparation of Ni and Ru aluminides / Thomas Klein." Saarbrücken : Saarländische Universitäts- und Landesbibliothek, 2020. http://d-nb.info/1231792027/34.

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40

Butts, Daniel A. Gale W. F. "Transient liquid phase bonding of a third generation gamma-titanium aluminum alloy-Gamma Met PX." Auburn, Ala., 2005. http://repo.lib.auburn.edu/2005%20Summer/doctoral/BUTTS_DANIEL_52.pdf.

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41

Weeks, Carrell Elizabeth. "Evaluation of a Gamma Titanium Aluminide for Hypersonic Structural Applications." Thesis, Georgia Institute of Technology, 2005. http://hdl.handle.net/1853/6955.

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Titanium matrix composites have been extensively evaluated for their potential to replace conventional superalloys in high temperature structural applications, with significant weight-savings while maintaining comparable mechanical properties. The purpose of this investigation is the evaluation of a gamma titanium aluminide alloy with nominal composition Ti-46.5Al-4(Cr,Nb,Ta,B)at.% as a matrix material for use in intermediate temperature applications (400-800㩠in future aerospace transportation systems, as very light-weight structures are needed for cost and weight reduction goals. Mechanica

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42

Rigaud, Vincent. "Contribution à l'étude de la solidification et à la description thermodynamique des équilibres de phases du système quaternaire Fe-Al-Ti-Zr." Thesis, Vandoeuvre-les-Nancy, INPL, 2009. http://www.theses.fr/2009INPL033N/document.

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La première partie de ce manuscrit est consacrée à l’étude des microstructures et des microségrégations, héritées de la solidification des alliages ternaires Fe-Al-Ti, Fe-Al-Zr et quaternaires Fe-Al-Ti-Zr. Pour améliorer la compréhension des phénomènes ayant lieu au cours de la solidification et disposer d’un outil permettant de prédire les phases formées au cours de la solidification, une description thermodynamique du coin riche en fer du système quaternaire Fe-Al-Ti-Zr est proposée dans une seconde partie. A partir de l’ensemble des données expérimentales et bibliographiques disponibles con

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43

Marte, Judson Sloan. "High temperature flow behavior of titanium aluminide intermetallic matrix composites." Thesis, Virginia Tech, 1996. http://hdl.handle.net/10919/45422.

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Al₃Ti, Al₅CuTi₂, and Al₆₆Mn₁₁Ti₂₃, intermetallic matrices reinforced with 30, 40, and 50 volume % TiB, have been produced by XD<sub>™</sub> processing and densified into bulk form by powder metallurgy techniques. The compressive flow behavior of the Al₃Ti and Al₅CuTi₂, composites have been evaluated at temperatures ranging from 1000°C to 1200°C and strain rates of 0.0001 and 0.001 sec⁻¹. The results have been analyzed by a correlation to the resulting microstructure, especially with regards to the intermetallic matrix composition, TiB₂ size, and interparticle spacing. The results of these anal

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44

Gururajan, M. P. "Mean Field Study Of Point Defects In B2-NiAl." Thesis, Indian Institute of Science, 2000. https://etd.iisc.ac.in/handle/2005/186.

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Point defects control many properties of technological importance in intermetallic compounds such as atomic diffusion, creep, hardness, mechanical properties and sintering. Farther, since intermetallic compounds are characterized by long range atomic order, the point defects in these compounds can be qualitatively different from those in pure metals and disordered alloys. In the present study, we have chosen β-NiAl for our point defect studies since it is a potential candidate for high temperature applications and a model system for the study of basic phenomena in ordered alloys. We have us

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45

Gururajan, M. P. "Mean Field Study Of Point Defects In B2-NiAl." Thesis, Indian Institute of Science, 2000. http://hdl.handle.net/2005/186.

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Point defects control many properties of technological importance in intermetallic compounds such as atomic diffusion, creep, hardness, mechanical properties and sintering. Farther, since intermetallic compounds are characterized by long range atomic order, the point defects in these compounds can be qualitatively different from those in pure metals and disordered alloys. In the present study, we have chosen β-NiAl for our point defect studies since it is a potential candidate for high temperature applications and a model system for the study of basic phenomena in ordered alloys. We have used

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46

Reilly, Nicole. "Hétérogénéités de fabrication des aluminiures de titane : caractérisation et maîtrise de leurs formations en coulée centrifuge." Thesis, Université de Lorraine, 2016. http://www.theses.fr/2016LORR0264/document.

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Le système Ti-Al est prometteur pour la substitution aux superalliages base-Ni aéronautiques. Dans la gamme de compositions d’intérêt pour ces applications, la solidification de ces alliages débute par la phase ß (structure cubique centrée) suivie d’une transition péritectique ß + L → α (structure hexagonale). En fonction de la teneur en Al, les proportions des phases ß et α au cours de la solidification varient, et le procédé de coulée centrifuge pour fabriquer des aubes de turbine pour l’aéronautique introduit d’autres variations structurales. Le présent travail explore l’influence de la ten

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47

Shazly, Mostafa. "Dynamic Deformation and Failure of Gamma-Met PX at Room and Elevated Temperatures." Case Western Reserve University School of Graduate Studies / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=case1100110669.

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48

Wu, Liberty Tse Shu. "On the degradation mechanisms of thermal barrier coatings : effects of bond coat and substrate." Thesis, University of Manchester, 2015. https://www.research.manchester.ac.uk/portal/en/theses/on-the-degradation-mechanisms-of-thermal-barrier-coatings-effects-of-bond-coat-and-substrate(ea6923cc-7d8f-4712-a964-fe625d421544).html.

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The operating efficiency and reliability of modern jet engines have undergone significant improvement largely owing to the advances of the materials science over the past 60 years. The use of both superalloys and TBCs in engine components such as turbine blades has made it possible for jet engines to operate at higher temperatures, allowing an optimal balance of fuel economy and thrust power. Despite the vast improvement in high temperature capability of superalloys, the utilization of TBCs has brought the concern of coating adhesion during their usage. TBCs are prone to spallation failure due

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49

Straubel, Ariane. "Gefüge-Eigenschaftsbeziehung einer TiAl-Legierung mit Oxidationsschutz und Wärmedämmschicht." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-224085.

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Etwa 27000 Flugzeuge durchqueren täglich den Luftraum über Europa. Dieser weiter steigende Flugverkehr erfordert neue Richtlinien für die Luftfahrzeuge. Im Besonderen stehen CO2- und NOX-Emission, Kerosinverbrauch und Lärmbelastung unter Optimierungsbedarf. Diese Anforderungen wurden bis 2050 vom Advisory Council for Aerospace Research in Europe (kurz: ACARE) festgelegt und werden wissenschaftlich unterstützt [3, 4]. Um diese Ziele zu erreichen, gibt es verschiedene Forschungsprogramme, Clean Sky ist ein EU-Technologieprogramm davon. In diesem Projekt werden sechs Demonstrator-Programme entwic

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50

Dyčková, Lucie. "Studium reakční syntézy intermetalických materiálů z depozitů kinetického naprašování binárních systémů obsahujících železo." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-231772.

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This thesis deals with reaction synthesis of materials Fe–Al, Fe–Cu and Fe–Ni from cold spray. In literature analysis are introduced these systems and for each system there is brief description of binary equilibrium diagram. Furthermore here are some short explanations of diffusion, Kirkendall effect and other possible processing technologies of intermetallic materials. In experimental part, samples of sprayed materials were annealed and then microstructural changes were investigated. This thesis contains photographs of microstructure, results from scanning electron microscopy, X-ray, and meas

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