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Dissertations / Theses on the topic 'Phase of formation'

Author: Grafiati

Published: 28 May 2022

Last updated: 30 July 2025

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1

Beck, Markus. "Boron in Palladium: interaction, phase formation and phase transformation." [S.l. : s.n.], 2001. http://www.bsz-bw.de/cgi-bin/xvms.cgi?SWB9556602.

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2

Olsson, Stefan. "Phase Transitions and Phase Formation of Hydrogen in Quasi-2D Lattices." Doctoral thesis, Uppsala : Acta Universitatis Upsaliensis : Univ.-bibl. [distributör], 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-3571.

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3

Tönjes, Ralf. "Pattern formation through synchronization in systems of nonidentical autonomous oscillators." Phd thesis, Universität Potsdam, 2007. http://opus.kobv.de/ubp/volltexte/2008/1597/.

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This work is concerned with the spatio-temporal structures that emerge when non-identical, diffusively coupled oscillators synchronize. It contains analytical results and their confirmation through extensive computer simulations. We use the Kuramoto model which reduces general oscillatory systems to phase dynamics. The symmetry of the coupling plays an important role for the formation of patterns. We have studied the ordering influence of an asymmetry (non-isochronicity) in the phase coupling function on the phase profile in synchronization and the intricate interplay between this asymmetry an

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4

Simmons, Lisa M. "Time resolved studies of metallic phase formation." Thesis, University of Salford, 2011. http://usir.salford.ac.uk/26912/.

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The processes of phase formation and transformation in crystallised amorphous metallic materials can be investigated using a wide variety of techniques. Time and temperature resolved neutron and x-ray scattering offers an insight into these processes in-situ often highlighting the formation of metastable and unreported phases. In this work, time- and temperature-resolved synchrotron x-ray diffraction and small angle neutron scattering studies are complemented with differential scanning calorimetry and transmission electron microscopy to gain a complete insight into the crystallisation and subs

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5

Gillman, Edward. "Topological defect formation in quantum phase transitions." Thesis, Imperial College London, 2018. http://hdl.handle.net/10044/1/62633.

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The Kibble Zurek mechanism describes the universal formation of topological defects during continuous symmetry breaking phase transitions. It has been confirmed in a wide variety of systems and is of interest within theoretical high energy physics and cosmology. While during high temperature phase transitions classical methods can be used to study topological defect formation, in zero temperature quantum phase transitions, quantum effects can dominate dynamics such that classical approximations fail. This is problematic in quantum field theory because topological defect formation constitutes a

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6

Rinaldi, Matteo. "Dynamics of Phase Separation and Pattern Formation." Research Showcase @ CMU, 2017. http://repository.cmu.edu/dissertations/946.

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The focus of this thesis is the study of the evolution of two models adopted in the context of phase separation and pattern formation, the Cahn-Hilliard model and the Swift-Hohenberg model. In the study of the Cahn-Hilliard model, the PDEs arising as the L2 and H-1 gradient flows in the higher dimensional setting n > 1 are studied, and estimates are provided on the evolution of solutions initiated close to configurations that globally or locally minimize the perimeter of the interface are provided. The results rely on a new regularity property of a local version of the well-known isoperimetric

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7

Lam, Ka Wing. "Pharmaceutical salt formation guided by phase diagrams /." View abstract or full-text, 2009. http://library.ust.hk/cgi/db/thesis.pl?CBME%202009%20LAM.

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8

Remhof, Arndt. "Hydrogen in yttrium films structure and phase formation /." [S.l. : s.n.], 1999. http://deposit.ddb.de/cgi-bin/dokserv?idn=959506136.

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9

Temizel, Guvenc. "Intermetallic Phase Formation At Fe-al Film Interefaces." Master's thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/12607589/index.pdf.

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This thesis presents the formation mechanism of intermetallics formed at Fe-Al film interfaces. Al thin films with different initial film thicknesses were coated on low carbon steel substrates by physical vapor deposition (PVD). By annealing the system at different temperatures and for different time intervals, several intermetallic phases were observed. X-Ray, SEM and EDS studies showed that intermetallic phases FeAl2 and Fe2Al5 are most dominant phases which were observed and they formed sequentially on the contrary of intermetallics which formed synchronous in bulk materials.

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10

Al-Jawad, Maisoon. "Time-resolved neutron studies of metallic phase formation." Thesis, University of Leeds, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.414214.

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11

Lei, Yi. "Formation de phase amorphe dans des alliages quasicristallins." Vandoeuvre-les-Nancy, INPL, 2003. http://www.theses.fr/2003INPL019N.

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La corrélation entre l'ordre icosaèdrique, plus généralement les quasicristaux (QCS), et la structure des amorphes métalliques est devenue importante depuis la découverte de systèmes permettant de produire des alliages de grandes dimensions, les "bulks". L'idée de cette étude est d'utiliser ces similitudes en prenant deux QCS, icosaèdriques IQC- Al[indice]62Cu[indice]25. 5Fe[indice]12. 5 (IQC) et décagonal DQC-Al[indice]70CO[indice]15Ni[indice]15 (DQC), comme éléments d'alliages dans un système pseudo-binaire pour produire des clusters icosaèdriques. L'addition d'un autre élément de grand rayo

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12

Skibinsky, Anna. "Modeling liquid-liquid phase transitions and quasicrystal formation." Thesis, Boston University, 2003. https://hdl.handle.net/2144/42658.

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Thesis (Ph. D.)--Boston University, 2003.<br>In this thesis, studies which concern two different subjects related to phase transitions in fluids and crystalline solids are presented. Condensed matter formation, structure, and phase transitions are modeled using molecular dynamics simulations of simple discontinuous potentials with attractive and repulsive interactions. Novel phase diagrams are proposed for quasicrystals, crystals, and liquids. In the first part of the thesis, the formation of a quasicrystal in a two dimensional monodisperse system is investigated using molecular dynamics

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13

Schmidt, Marek Wojciech, and Marek Schmidt@rl ac uk. "Phase formation and structural transformation of strontium ferrite SrFeOx." The Australian National University. Research School of Physical Sciences and Engineering, 2001. http://thesis.anu.edu.au./public/adt-ANU20020708.190055.

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Non-stoichiometric strontium iron oxide is described by an abbreviated formula SrFeOx (2.5 ≤ x ≤ 3.0) exhibits a variety of interesting physical and chemical properties over a broad range of temperatures and in different gaseous environments. The oxide contains a mixture of iron in the trivalent and the rare tetravalent state. The material at elevated temperature is a mixed oxygen conductor and it, or its derivatives,can have practical applications in oxygen conducting devices such as pressure driven oxygen generators, partial oxidation reactors in electrodes for solid oxide fuel cells (SOFC).

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14

Sharma, Satyajeet. "AMORPHOUS PHASE FORMATION IN MECHANICALLY ALLOYED FE-BASED SYSTEMS." Doctoral diss., University of Central Florida, 2008. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/2484.

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ABSTRACT Bulk metallic glasses have interesting combination of physical, chemical, mechanical, and magnetic properties which make them attractive for a variety of applications. Consequently there has been a lot of interest in understanding the structure and properties of these materials. More varied applications can be sought if one understands the reasons for glass formation and the methods to control them. The glass-forming ability (GFA) of alloys can be substantially increased by a proper selection of alloying elements and the chemical composition of the alloy. High GFA will enable in obtai

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15

Bian, Hao. "Formation, phase equilibrium and gas exchange of methane hydrates." Thesis, Imperial College London, 2017. http://hdl.handle.net/10044/1/58181.

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The phase behaviour and the formation/gas exchange kinetics of methane hydrates have been studied at elevated pressures and low temperatures, conditions under which naturally occurring hydrates exist or synthetic gas hydrates are formed during exploration operations and transportations. To this end, experimental measurements of hydrate phase equilibria for the binary methane and water mixture were made in mesoporous and macroporous silica, a stirred slurry reactor was used to study hydrate formation kinetics under various driving forces and water-based media, and a new Raman imaging technique

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16

Lai, Chung-Chuan. "Phase Formation of Nanolaminated Transition Metal Carbide Thin Films." Doctoral thesis, Linköpings universitet, Tunnfilmsfysik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-137367.

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Research on inherently nanolaminated transition metal carbides is inspired by their unique properties combining metals and ceramics, such as higher damage tolerance, better machinability and lower brittleness compared to the binary counterparts, yet retaining the metallic conductivity. The interesting properties are related to their laminated structure, composed of transition-metalcarbide layers interleaved by non-transition-metal (carbide) layers. These materials in thin-film form are particularly interesting for potential applications such as protective coatings and electrical contacts. The

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17

Kametani, Fumitake. "Phase formation in Ag-sheathed (Bi,Pb)2223 tapes." 京都大学 (Kyoto University), 2006. http://hdl.handle.net/2433/143978.

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18

Aboofazeli, Reza. "The formation and characterization of phospholipid microemulsions." Thesis, King's College London (University of London), 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.307045.

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19

Paré, Chantal. "Formation de la phase liquide-ordonnée dans des matrices lipidiques." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape3/PQDD_0018/NQ53284.pdf.

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20

Shin, Jong Ho. "Role of nucleation and growth in two-phase microstructure formation." [Ames, Iowa : Iowa State University], 2007.

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21

Larsson, Niklas. "Gradient formation in cemented carbides with 85Ni:15Fe-binder phase." Thesis, Uppsala universitet, Tillämpad materialvetenskap, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-256503.

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In today’s inserts used for metal cutting the binder phase consists of cobalt (Co).However, EU’s REACH programme and the U.S’s National Toxicity Programme(NTP) classified Co as toxic/carcinogenic. Therefore, there is a strong need toinvestigate alternative binder phases. This thesis covers sintering and characterisationof cemented carbide with a binder phase consisting of nickel (Ni) and iron (Fe) withthe composition of 85Ni:15Fe. The aim was to study the gradient formation of turninginsert and find sintering processes to achieve a gradient structure with the targetedthickness of 26 microns. S

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22

Zuberi, Bilal 1976. "Microphysics of atmospheric aerosols : phase transitions and cloud formation mechanisms." Thesis, Massachusetts Institute of Technology, 2003. http://hdl.handle.net/1721.1/17654.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 2003.<br>Vita.<br>Includes bibliographical references (leaves 134-148).<br>Clouds play an extremely important role in our atmosphere, from controlling the local weather, air pollution and chemical balance in the atmosphere to affecting long-term climatic changes at local, regional and global scales. The mechanisms through which tropospheric clouds form are still not fully understood, leading to gross uncertainties in understanding the effect of atmospheric aerosols on the environment. Using laboratory measurements, mic

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23

Partington, Edward Colin. "Liquid phase routes to the formation of alumina-metal composites." Thesis, Imperial College London, 1988. http://hdl.handle.net/10044/1/47214.

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24

Gangaprasad, Rao Smita. "Phase formation in multicomponent films based on 3d transition metals." Licentiate thesis, Linköpings universitet, Tunnfilmsfysik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-174291.

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The need for materials that enhance life span, performance, and sustainability has propelled research in alloy design from binary alloys to more complex systems such as multicomponent alloys. The CoCrFeMnNi alloy, more commonly known as the Cantor alloy, is one of the most studied systems in bulk as well as thin film. The addition of light elements such as boron, carbon, nitrogen, and oxygen is a means to alter the properties of these materials. The challenge lies in understanding the process of phase formation and microstructure evolution on addition of these light elements. To address this c

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25

Wiant, David B. "PATTERN FORMATION AND PHASE TRANSITIONS IN BENT-CORE LIQUID CRYSTALS." Kent State University / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=kent1175781991.

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26

Atkinson, Paul Michael. "Formation of anisotropic flat sheet membranes via evaporative TIPS /." Digital version accessible at:, 1999. http://wwwlib.umi.com/cr/utexas/main.

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27

Akhtar, Mahmood. "Microemulsions formation, stability and their characterisations." Thesis, Brunel University, 1996. http://bura.brunel.ac.uk/handle/2438/5004.

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This thesis is concerned with aspects of the surface and colloid chemistry of various microemulsion systems stabilised by pure nonionic surfactants and alcohol as well as mixtures of nonionic and anionic surfactants. Phase equilibria and interfacial characteristics of the systems are studied with a view to their potential usefulness for enhanced oil recovery, in which salinity and temperature are important parameters. The equilibrium microemulsion phases are scanned at different temperatures and salinities and thus interfacial boundaries can be determined and optimum salinity scans can be perf

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28

Gorham, LeRoy A. "Large Scene SAR Image Formation." Wright State University / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=wright1452031174.

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29

Eyhusen, Sören. "Phase formation processes in the synthesis of boron nitride thin films." [S.l.] : [s.n.], 2005. http://webdoc.sub.gwdg.de/diss/2005/eyhusen.

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30

Fedeyko, Joseph M. "Silica phase behavior and the formation of microporous and mesoporous materials." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file 5.93 Mb., 258 p, 2006. http://proquest.umi.com/pqdlink?did=1172110321&Fmt=7&clientId=79356&RQT=309&VName=PQD.

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31

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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32

Moe, Maxwell, and Kaitlin M. Kratter. "Dynamical Formation of Close Binaries during the Pre-main-sequence Phase." IOP PUBLISHING LTD, 2018. http://hdl.handle.net/10150/627100.

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Solar-type binaries with short orbital periods (P-close equivalent to 1-10. days; a less than or similar to 0.1. au) cannot form directly via fragmentation of molecular clouds or protostellar disks, yet their component masses are highly correlated, suggesting interaction during the pre-main-sequence (pre-MS) phase. Moreover, the close binary fraction of pre-MS stars is consistent with that of their MS counterparts in the field (F-close = 2.1%). Thus, we can infer that some migration mechanism operates during the early pre-MS phase (tau less than or similar to 5 Myr) that reshapes the primordia

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33

Anderson, P. D. J. "Formation, decomposition and isomerisation of protonated molecules in the gas phase." Thesis, Swansea University, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.635780.

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Pulsed high pressure source mass spectrometry has been used to investigate gas phase proton transfer reactions and the reactivity of gas phase protonated molecules. Proton transfer reactions involving substituted benzaldehydes, where protonation takes place on the aldehyde substituent, were studied in order to investigate their reactivity in relation to previous proton transfer measurements involving aromatics, which protonated on the ring, which showed some unusual behaviour. Gas phase stabilities were obtained in the form of proton affinities which were then compared with the results of semi

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34

Lee, Sukyeon. "Electrically Controlled Formation and Release of Admicelles for Solid Phase Extraction." TopSCHOLAR®, 2014. http://digitalcommons.wku.edu/theses/1334.

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Solid phase extraction is one of the most widely used methods to concentrate diluted compounds in a solution. Substances can be extracted into admicelles and hemimicelles, which are surface adsorbed micelles and surfactant monolayers, respectively. Investigations of the electrical control of surfactants on surfaces for the purpose of analyte preconcentration prior to chromatographic analysis are presented. The surfactant layer serves as the “stationary phase” in a solid phase extraction sorbent scenario. Analytes are adsorbed on this layer, and then released from the solid phase via surfactant

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35

Gargarella, Piter. "Phase formation, thermal stability and mechanical behaviour of TiCu-based alloys." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2014. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-133969.

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The large elastic limit, the strength close to the theoretical limit, the excellent magnetic properties and good corrosion resistance of bulk metallic glasses (BMGs) make them promising for several applications such as micro-geared motor parts, pressure sensors, Coriolis flow meters, power inductors and coating materials. The main limitation of these materials is their reduced macroscopic ductility at room temperature, resulting from an inhomogeneous deformation concentrated in narrows shear bands. The poor ductility can be overcome by the incorporation of a ductile second phase in the glassy

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36

Carsbring, Amanda. "Heat Treatment and Secondary Phase Formation in FeCrNi Medium Entropy Alloys." Thesis, KTH, Materialvetenskap, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-291251.

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The topics of high entropy alloys (HEA) and medium entropy alloys (MEA) have been heavily researched in recent years. A HEA usually consists of five or more base elements, and a MEA would have three or four base elements. These types of alloys are multi-principal element alloys (MPEA) that have been thought to have interesting properties due to their high configurational entropy, which was thought to be the reason for stabilized simple solid solution phase in the HEA. The high entropy effect contributing to stable single phase in these alloys has been discussed and has not been found to be a p

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37

Liu, Pin-Wu. "CaMKII activation triggers persistent formation and segregation of postsynaptic liquid phase." Doctoral thesis, Kyoto University, 2021. http://hdl.handle.net/2433/263576.

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38

Walheim, Stefan. "Micrometer and sub-micrometer structure formation of phase separating polymer films." [S.l. : s.n.], 2000. http://www.bsz-bw.de/cgi-bin/xvms.cgi?SWB8885132.

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39

Batarseh, Melanie Turkett. "Formation of anisotropic hollow fiber membranes via thermally induced phase separation /." Digital version accessible at:, 1999. http://wwwlib.umi.com/cr/utexas/main.

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40

Amos, Fairland F. "Template-assisted mineral formation via an amorphous liquid phase precursor route." [Gainesville, Fla.] : University of Florida, 2005. http://purl.fcla.edu/fcla/etd/UFE0011622.

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41

Katari, Madanakrishna. "Formation and Characterization of Reduced Metal Complexes in the Gas Phase." Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLX091/document.

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La caractérisation complète d’intermédiaires réactionnels intervenants dans des procédés de catalyse homogène est une tâche ardue en raison de leur réactivité et de leur faible concentration. Ceci est particulièrement vrai pour les espèces radicalaires telles que les complexes organométalliques réduits, qui sont des intermédiaires en photocatalyse ou lorsque ces complexes possèdent des ligands non-innocents. Par conséquent, leur structure électronique est encore mal comprise, sachant que l'électron ajouté peut être situé sur différents sites de la molécule.Dans ce contexte, nous avons développ

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42

SEGUELAS, CATHERINE. "Etude de la formation des siliciures de palladium et de chrome en phase liquide et en phase solide." Toulouse 3, 1989. http://www.theses.fr/1989TOU30036.

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Synthese des travaux parus dans la litterature sur les differents siliciures metalliques. Developpement des principaux modes de traitement rapide et exposition des principes sur lesquels reposent les traitements par faisceau energetique (laser et electrons) et par lumiere incoherente. Aspect theorique de la formation des siliciures. Enfin, description rapide de l'appareillage utilise et de la demarche suivie et synthese des resultats experimentaux obtenus par traitement isotherme rapide des systemes pd/si et cr/si

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43

Lin, Tingdong. "On the phase behavior and particle formation in polyimide/solvent/nonsolvent ternary systems." Diss., This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-06062008-165916/.

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44

Despland, Emma. "Small-scale environmental factors and Desert locust behaviour and phase state." Thesis, University of Oxford, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.325956.

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45

Liang, Xunyu. "Axion field and the quark nugget's formation at the QCD phase transition." Thesis, University of British Columbia, 2016. http://hdl.handle.net/2429/58927.

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We study a testable dark matter (DM) model outside of the standard WIMP paradigm in which the observed ratio Ωdark ≃ Ω visible for visible and dark matter densities finds its natural explanation as a result of their common QCD origin when both types of matter (DM and visible) are formed at the QCD phase transition and both are proportional to ΛQCD. Instead of the conventional ``baryogenesis" mechanism we advocate a paradigm when the ``baryogenesis'' is actually a charge separation process which occur in the presence of the CP odd axion field a(x). In this scenario the global baryon number of t

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46

Sarah, Oddy. "Effect of Phase-Contacting Patters and Operating Conditions on Gas Hydrate Formation." Thesis, Université d'Ottawa / University of Ottawa, 2014. http://hdl.handle.net/10393/31414.

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Research into hydrate production technologies has increased in the past years. While many technologies have been presented, there is no consensus on which reactor design is best for each potential application. A direct experimental comparison of hydrate production technologies has been carried out in between a variety of reactor configurations at similar driving force conditions. Three main reactor types were used: a stirred tank, a fixed bed and a bubble column and compared different phase contacting patterns for the stirred tank and bubble column. In the initial phase of hydrate formatio

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47

Smartt, William Mark. "Formation of microporous polymer via thermally-induced phase transformations in polymer solutions." Diss., Georgia Institute of Technology, 1991. http://hdl.handle.net/1853/32853.

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48

Bright, Daniel William. "Photophysical studies of beta phase formation in poly(9,9-di-n-alkylfluorenes)." Thesis, Durham University, 2011. http://etheses.dur.ac.uk/909/.

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The photophysical changes that take place in Poly(9,9-di-n-alkylfluorenes) upon formation of the beta phase in methylcyclohexane solution are observed by optical spectroscopy. The equilibrium absorption spectra as a function of temperature show that conformational changes occur for all five polymers studied, from the hexyl (PF6) to decyl (PF10) side chains. The spectroscopic indicators of beta phase formation are not observed in PF6, and the trend of beta phase formation efficacy shows an optimal side chain length of 8 carbons. The beta phase formation in PF8, PF9 and PF10 is modelled using a

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49

Liu, Lei [Verfasser], and Rainer [Akademischer Betreuer] Spurzem. "A Multi-Phase Chemodynamic Galaxy Formation Model / Lei Liu ; Betreuer: Rainer Spurzem." Heidelberg : Universitätsbibliothek Heidelberg, 2013. http://d-nb.info/1177809931/34.

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50

VILLALOBOS, EDUARDO MARTIN CABELLOS. "EMULSION FORMATION IN THE TWO-PHASE OIL-WATER FLOW THROUGH SMALL PASSAGES." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2010. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=16583@1.

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CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO<br>A produção de óleo diminui e a produção de água aumenta com o passar do tempo na vida de um reservatório. A mistura de óleo e água é geralmente produzida na forma de uma emulsão. A formação da emulsão começa no escoamento bifásico no interior do reservatório e sua estrutura muda na medida em que os líquidos escoam através de tubulações, bombas e válvulas até as instalações de superfície. Durante a produção, as gotas maiores da fase dispersa quebram-se mudando a distribuição do tamanho das gotas. É importante conhecer a distribuiç

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