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Dissertations / Theses on the topic 'Phase Decomposition'

Author: Grafiati

Published: 4 June 2021

Last updated: 6 February 2022

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1

Ullbrand, Jennifer. "Phase field modeling of Spinodal decomposition in TiAlN." Licentiate thesis, Linköpings universitet, Nanostrukturerade material, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-79611.

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TiAlN thin films are used commercially in the cutting tool industry as wear protection of the inserts. During cutting, the inserts are subjected to high temperatures (~ 900 ° C and sometimes higher). The objective of this work is to simulate the material behavior at such high temperatures. TiAlN has been studied experimentally at least for two decades, but no microstructure simulations have so far been performed. In this thesis two models are presented, one based on regular solution and one that takes into account clustering effects on the thermodynamic data. Both mo

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2

Brueni, Dennis J. "Minimal PMU placement for graph observability : a decomposition approach /." Thesis, This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-10312009-020314/.

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3

Shahkar, G. R. "Thermal decomposition of azo compounds in the gas phase." Thesis, Swansea University, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.638804.

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4

CHEN, DONGSHENG. "Iron/Chromium Phase Decomposition Behavior in Oxide Dispersion Strengthened Ferritic Steels." Kyoto University, 2015. http://hdl.handle.net/2433/199417.

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5

Donaldson, Nicholas. "Extending the phase vocoder with damped sinusoid atomic decomposition of transients." Thesis, McGill University, 2011. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=104832.

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Pitch-preserving time scale modification and time-preserving pitch modification of recorded sounds are integral effects in modern digital music production, and some implementation of these effects can be found in nearly all commercial digital audio production software. Recent research has led to improvements in the reduction of transient smearing artifacts in otherwise high-quality frequency domain time scaling (phase vocoder) algorithms, but many modern implementations still exhibit noticeable smoothing of very abrupt transients, especially for drastic time scale modifications. By using a spa

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6

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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7

Akbas, Mehmet Ali. "Synthesis, decomposition and phase homogeneity of PLZT powder and microstructural evolution on densification." Thesis, University of Sheffield, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.296726.

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8

Wardle, Mason B. "A PAM Decomposition of Weak CPM." Diss., CLICK HERE for online access, 2005. http://contentdm.lib.byu.edu/ETD/image/etd868.pdf.

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9

Buck, Marco [Verfasser], and Oleg [Akademischer Betreuer] Iliev. "Overlapping Domain Decomposition Preconditioners for Multi-Phase Elastic Composites / Marco Buck. Betreuer: Oleg Iliev." Kaiserslautern : Technische Universität Kaiserslautern, 2013. http://d-nb.info/1037109449/34.

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10

Richardson, Brian Ross. "A reduced-order model based on proper orthogonal decomposition for non-isothermal two-phase flows." [College Station, Tex. : Texas A&M University, 2008. http://hdl.handle.net/1969.1/ETD-TAMU-2623.

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11

Kojima, Junichi. "Phase behaviors and spinodal decomposition process of polyolefin solutions with supercritical and near-supercritical solvents." 京都大学 (Kyoto University), 2005. http://hdl.handle.net/2433/144523.

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12

Pu, Shusen. "Noise Decomposition for Stochastic Hodgkin-Huxley Models." Case Western Reserve University School of Graduate Studies / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=case1605789507246466.

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13

Baghsheikhi, Saeed. "Spinodal Decomposition in the Binary Fe-Cr System." Thesis, KTH, Metallografi, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-37190.

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Spinodal decomposition is a phase separation mechanism within the miscibility gap. Its importance in case of Fe-Cr system, the basis of the whole stainless steel family, stems from a phenomenon known as the “475oC embrittlement” which results in a ruin of mechanical properties of ferritic, martensitic and duplex stainless steels. This work is aimed at a better understanding of the phase separation process in the Fe-Cr system. Alloys of 10 to 55 wt.% Cr , each five percent, were homogenized to achieve fully ferritic microstructure and then isothermally aged at 400, 500 and 600oC for different

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14

Griffiths, David P. "Trying to decrease the decomposition rates of peracids (and Hâ‚‚Oâ‚‚) by solution-phase metal ions." Thesis, University of York, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.423842.

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15

Catoire, Laurent. "Mecanismes de la decomposition thermique et de l'oxydation explosive de la monomethylhydrazine (mmh) en phase gazeuse." Orléans, 1995. http://www.theses.fr/1995ORLE2006.

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La monomethylhydrazine (mmh) est un combustible couramment utilise dans le domaine spatial, souvent associee au tetraoxyde d'azote (nto). La mmh a ete utilisee lors des missions apollo et viking, entre autres. A l'heure actuelle, elle l'est sur de nombreux satellites ainsi que sur les navettes spatiales americaines. Mmh le sera sur le lanceur ariane 5. Dans un futur plus lointain, l'utilisation de la mmh, associee au nto ou a l'oxygene, est envisagee pour l'exploration humaine de la planete mars. L'etude de la decomposition thermique de la mmh diluee a plus de 97% par l'argon a ete suivie par

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16

Nag, Soumya. "Influence of Beta Instabilities on the Early Stages of Nucleation and Growth of Alpha in Beta Titanium Alloys." The Ohio State University, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=osu1204570232.

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17

Boatright, David L. "Kinetic and mechanistic studies of the thermal decomposition of glycolate and N-Nitrosoiminodiacetic acid in aqueous basic salt solutions : II Phase transfer catalysis in supercritical fluids." Diss., Georgia Institute of Technology, 1995. http://hdl.handle.net/1853/29885.

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18

Wehrenberg, Christopher. "Phase transformations in shock compacted magnetic materials." Diss., Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/43595.

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Shock compaction experiments were performed on soft magnetic phases Fe₄N and Fe₁₆N₂, and hard magnetic phases Nd₂Fe₁₄B and Sm₂Fe₁₇N₃ in order to determine their thermo-mechanical stability during shock loading and explore the possibility of fabricating a textured nanocomposite magnet. Gas gun experiments performed on powders pressed in a three capsule fixture showed phase transformations occurring in Fe₄N, Fe₁₆N₂, and Nd₂Fe₁₄B, while Sm₂Fe₁₇N₃ was observed to be relatively stable. Shock compaction of FCC Fe₄N resulted in a partial transformation to HCP Fe₃N, consistent with previous reports of

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19

Kwak, Young-Woo. "Isomerization Reactions in Organosilicon Chemistry." Thesis, North Texas State University, 1985. https://digital.library.unt.edu/ark:/67531/metadc332336/.

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Dimethylsilene, generated from the thermal gas phase reaction of 1,1-dimethyl-1-silacyclobutane, reacts with alkynes to produce silacyclobutenes or acyclic silanes. The temperature dependence of the product ratios have been determined and the relative reactivities of three different alkynes toward the 1,1-dimethylsilene has been determined. 1-Hydrido-1-methylsilene has been generated by gas phase thermal decomposition from three different precursors. Trapping studies with butadiene and trimethylsilane lead to products expected from dimethylsilylene. The most plausible explanation for these obs

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20

Viggiano, Bianca Fontanin. "Reduced Order Description of Experimental Two-Phase Pipe Flows: Characterization of Flow Structures and Dynamics via Proper Orthogonal Decomposition." PDXScholar, 2017. https://pdxscholar.library.pdx.edu/open_access_etds/3829.

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Multiphase pipe flow is investigated using proper orthogonal decomposition for tomographic X-ray data, where holdup, cross-sectional phase distributions and phase interface characteristics within the pipe are obtained. Six cases of stratified and mixed flow with water content of 10%, 30% and 80% are investigated to gain insight into effects of velocity and proportion of water on the flow fields. Dispersed and slug flows are separately analyzed to consider the added interface complexity of the flow fields. These regimes are also highly applicable to industry operational flows. Instantaneous and

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21

CHEN, DONGSHENG. "酸化物分散強化フェライト鋼における鉄/クロム相分離挙動". Kyoto University, 2015. http://hdl.handle.net/2433/199548.

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22

Lai, Chung-Chuan. "Growth and Phase Stability of Titanium Aluminum Nitride Deposited by High Power Impulse Magnetron Sputtering." Thesis, Linköpings universitet, Plasma och beläggningsfysik, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-68922.

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In this work, we investigate the relation between the diffusion behavior of Ti1-xAlxN at elevated temperatures and the microstructure. Thinfilm samples are synthesized by reactive co-sputtering with two cathodes. One cathode equipped with Ti target is connected to a highpower impulse magnetron sputtering (HiPIMS) power supply, and the other cathode equipped with Al target is operated with a directcurrent power source. The spinodal decomposition of cubic metastable Ti1-xAlxN controlled by thermally activated diffusion is observe fordiffusion behavior. Various HiPIMS pulsing frequencies are used

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23

Austin, Calvin A. "To dissociate or decompose : investigating gas phase rearrangement of some simple to complex compounds using mass spectrometry and thermal analysis /." Connect to resource online, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=ysu1222304311.

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24

Zhou, Jing. "Experimental study of phase separation in Fe-Cr based alloys." Licentiate thesis, KTH, Metallografi, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-119230.

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Duplex stainless steels (DSSs) are important engineering materials due to their combination of good mechanical properties and corrosion resistance. However, as a consequence of their ferrite content, DSSs are sensitive to the so-called ‘475°C embrittlement’, which is induced by phase separation, namely, the ferrite decomposed into Fe-rich ferrite (α) and Cr-rich ferrite (α'), respectively. The phase separation is accompanied with a severe loss of toughness. Thus, the ‘475°C embrittlement’ phenomenon limits DSSs’ upper service temperature to around 250°C. In the present work, Fe-Cr binary model

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25

Bradbury, James Edward. "AKD sizing reversion : the vapor phase adsorption of the thermal decomposition products of alkyl ketene dimmer onto cellulose substrates." Diss., Georgia Institute of Technology, 1997. http://hdl.handle.net/1853/7013.

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26

Asp, Grönhagen Klara. "Phase-field modeling of surface-energy driven processes." Doctoral thesis, KTH, Metallografi, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-11036.

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Surface energy plays a major role in many phenomena that are important in technological and industrial processes, for example in wetting, grain growth and sintering. In this thesis, such surface-energy driven processes are studied by means of the phase-field method. The phase-field method is often used to model mesoscale microstructural evolution in materials. It is a diffuse interface method, i.e., it considers the surface or phase boundary between two bulk phases to have a non-zero width with a gradual variation in physical properties such as energy density, composition and crystalline struc

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27

Louchart, Olivier. "Developpement de methodes spectrales pour fluides compressibles et parallelisation par decomposition de domaine. Application au transport physique en phase vapeur." Aix-Marseille 2, 1997. http://www.theses.fr/1997AIX22127.

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Le memoire concerne l'etude, par voie numerique, de l'hydrodynamique complexe lors d'un processus de cristallogenese de type pvt (physical vapour transport) base sur le transport d'un materiau, en phase vapeur, pour la realisation de films cristallins tres purs. Au-dela du procede pvt, c'est tout le probleme de la connaissance de la convection dans les melanges de fluides compressibles qui apparait. Le travail comporte le developpement de deux codes de calcul de tres haute precision bases sur les methodes spectrales collocation-chebyshev. Le premier code resout les equations non-stationnaires,

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28

Zhou, Jing. "An Atom-Probe Tomography Study of Phase Separation in Fe-Cr Based Steels." Doctoral thesis, KTH, Metallografi, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-150796.

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Stainless steels are very important engineering materials in a variety of applications such as in the food industry and nuclear power plants due to their combination of good mechanical properties and high corrosion resistance. However, ferrite-containing stainless steels are sensitive to the so-called ‘475°C embrittlement’, which is induced by phase separation of the ferrite phase, where it decomposes into Fe-rich ferrite (α) and Cr-rich ferrite (α'). The phase separation is accompanied with a severe loss of toughness. Therefore, the upper service temperature of ferrite-containing stainless st

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29

Bisaro, René. "Etude des proprietes et structure des couches minces de silicium deposees par decomposition thermique de silane." Paris 6, 1987. http://www.theses.fr/1987PA066267.

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La taille des grains, la texture, la morphologie de surface, la conductivite electrique et l'absorption optique sont etudies en fonction des parametres de depot. L'optimum des proprietes de transport des couches polycristallines est lie a un regime de cristallisation en phase solide. Etude du processus de cristallisation, effet d'impuretes dopantes. On met en evidence l'effet des liaisons disponibles et de leur etat de charge sur le mecanisme des cristallisation

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30

Manzanarez, Hervé. "Modélisation et simulation numérique de la dynamique de séparation de phase d’une solution polymère dans le cadre de la formation de membranes poreuses." Thesis, Montpellier, 2017. http://www.theses.fr/2017MONTT159.

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Ce travail de thèse vise à modéliser et simuler la séparation de phase d’un système polymère solvant afin de comprendre, prédire et maitriser la dynamique de formation de membranes poreuses. L’équation phénoménologique proposée de Cahn-Hilliard, couplée à un champ de vitesse (Modèle H dans la classification de Hohenberg et Halperin) sera utilisée pour décrire l’inversion de phase induite par un changement de température (procédé TIPS), le système PMMA/cyclohexanol étant pris comme système de référence.Dans un premier temps, nous nous sommes attachés à étudier de façon systématique l’influence

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31

Simiand, Nicole. "Contribution a l'etude cinetique des peroxydes organiques : decomposition en phase gazeuse et reactions de radical ro, formation dans un moteur cfr." Paris 6, 1987. http://www.theses.fr/1987PA066271.

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32

Xiong, Wei. "Thermodynamic and Kinetic Investigation of the Fe-Cr-Ni System Driven by Engineering Applications." Doctoral thesis, KTH, Termodynamisk modellering, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-96707.

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This work is a thermodynamic and kinetic study of the Fe-Cr-Ni system as the core of stainless steels. The Fe-Cr, Fe-Ni and Cr-Ni systems were studied intensively using both computational and experimental techniques, including CALPHAD (CALculation of PHAse Diagrams), phase field simulation, ab initio modeling, calorimetry, and atom probe tomography. The purpose of this thesis is to reveal the complexity of the phase transformations in the Fe-Cr-Ni system via the integrated techniques. Due to the importance of the binary Fe-Cr system, it was fully reassessed using the CALPHAD technique by incor

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33

Colignon, Yann. "Etude par sonde atomique tomographique de la décomposition spinodale dans le système Fe-Cr en couches minces." Thesis, Aix-Marseille, 2015. http://www.theses.fr/2015AIXM4359.

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Les cinétiques de décomposition dues à la présence d'une lacune de miscibilité dans le système Fe-Cr sont généralement étudiées dans des alliages Fe-Cr massifs pour lesquels la décomposition se déroule en 3 dimensions. Nous avons étudié les cinétiques de décomposition spinodale dans des couches minces Fe-Cr. Ces couches minces comportent une oscillation de composition de Cr dont le vecteur d'onde est perpendiculaire à la surface de l'échantillon. La décomposition de l'alliage a alors pour conséquence d'augmenter l'amplitude de l'oscillation au cours d'un recuit et donc d'engendrer une décompos

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34

Dorval, Nelly. "Analyse optique in situ de la phase gazeuse au cours du depot de carbure de silicium par decomposition thermique du melange methyltrichlorosilane-hydrogene." Paris 11, 1993. http://www.theses.fr/1993PA112404.

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Les methodes optiques de mesure in situ, diffusion raman anti-stokes coherente (drasc) et fluorescence induite par laser (fil) ont ete utilisees pour caracteriser la phase gazeuse au cours du depot de carbure de silicium (sic) a partir du melange gazeux, methyltrichlorosilane ch#3sicl#3 (mts)-hydrogene, en ecoulement a faible pression. Les experiences d'analyse de la phase gazeuse ont ete conduites dans deux reacteurs de depot chimique en phase vapeur: l'un etant a parois chaudes et l'autre a parois froides. Dans le reacteur a parois chaudes, des profils de temperature et des mesures de concen

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35

Testard, Vincent. "Etude par simulations numériques de l'influence de la transition vitreuse sur la séparation de phase liquide-gaz." Thesis, Montpellier 2, 2011. http://www.theses.fr/2011MON20014/document.

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Nous réalisons des simulations numériques de décompositions spinodales en dessous de la température de transition vitreuse. Nous étudions l'influence de cette transition sur la séparation de phase liquide-gaz. Ces études ont été motivées pour expliquer un mécanisme de formation de gels à partir de systèmes colloïdaux ayant un potentiel d'attraction à courte portée (systèmes colloïdes/polymères non-adsorbant) mis en évidence lors de récentes expériences mais dont les raisons étaient floues. Nos résultats confirment que la structure des gels est induite par la décomposition spinodale, tandis que

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36

Badyka, Romain. "Influence des éléments d'alliage sur la cinétique de vieillissement de la ferrite d'aciers inoxydables austéno-ferritiques moulés." Thesis, Normandie, 2018. http://www.theses.fr/2018NORMR072/document.

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Les aciers inoxydables austéno-ferritiques moulés sont utilisés pour certains composants ducircuit primaire des centrales nucléaires de génération II. Aux températures de service (285 °C -325 °C), des modifications de propriétés mécaniques sont observées. Elles sont imputables auxtransformations de phases au sein de la ferrite de ces aciers : la décomposition spinodale (DS) en phaseα (riche en Fe) et α’ (riche en Cr) et la précipitation de la phase G aux interfaces α/α'. S'il est admisque la composition de l’acier influe sur l’évolution des transformations de phase de la ferrite (lesaciers moi

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37

Hurley, Jeffrey S. "Phase transfer catalysis of deuterium exchange reactions : II kinetic and mechanistic studies of the thermal decomposition of glycolate and hedta in the presence of the sodium salts of hydroxide, nitrate, nitrite, aluminate and carbonate." Diss., Georgia Institute of Technology, 1992. http://hdl.handle.net/1853/30717.

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38

Sari, Huseyin. "Motion Estimation Using Complex Discrete Wavelet Transform." Master's thesis, METU, 2003. http://etd.lib.metu.edu.tr/upload/1223205/index.pdf.

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The estimation of optical flow has become a vital research field in image sequence analysis especially in past two decades, which found applications in many fields such as stereo optics, video compression, robotics and computer vision. In this thesis, the complex wavelet based algorithm for the estimation of optical flow developed by Magarey and Kingsbury is implemented and investigated. The algorithm is based on a complex version of the discrete wavelet transform (CDWT), which analyzes an image through blocks of filtering with a set of Gabor-like kernels with different scales and orientations

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39

Barbini, Leonardo. "Techniques for condition monitoring using cyclo-non-stationary signals." Thesis, University of Bath, 2018. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.761025.

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Condition based maintenance is becoming increasingly popular in many industrial contexts, offering substantial savings and minimising accidental damage. When applied to rotating machinery, its most common tool is vibration analysis, which relies on well-established mathematical models rooted in the theory of cyclo-non-stationary processes. However, the extraction of diagnostic information from the real world vibration signals is a delicate task requiring the application of sophisticated signal processing techniques, tailored for specific machines operating under restricted conditions. Such dif

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Yamada, Ryo. "Application of Steepest-Entropy-Ascent Quantum Thermodynamics to Solid-State Phenomena." Diss., Virginia Tech, 2018. http://hdl.handle.net/10919/85866.

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Steepest-entropy-ascent quantum thermodynamics (SEAQT) is a mathematical and theoretical framework for intrinsic quantum thermodynamics (IQT), a unified theory of quantum mechanics and thermodynamics. In the theoretical framework, entropy is viewed as a measure of energy load sharing among available energy eigenlevels, and a unique relaxation path of a system from an initial non-equilibrium state to a stable equilibrium is determined from the greatest entropy generation viewpoint. The SEAQT modeling has seen a great development recently. However, the applications have mainly focused on gas pha

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41

Feldhoff, Armin, Konstantin Efimov, Mirko Arnold, Qiang Xu, and Frans D. Tichelaar. "In situ electron energy-loss spectroscopy of cobalt and iron valences in a mixed conducting perovskite and the correlation to a phase decomposition at intermediate temperatures." Universitätsbibliothek Leipzig, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-187987.

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42

Feldhoff, Armin, Konstantin Efimov, Mirko Arnold, Qiang Xu, and Frans D. Tichelaar. "In situ electron energy-loss spectroscopy of cobalt and iron valences in a mixed conducting perovskite and the correlation to a phase decomposition at intermediate temperatures." Diffusion fundamentals 12 (2010) 71, 2010. https://ul.qucosa.de/id/qucosa%3A13900.

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43

Shahin, Lara. "Analysis of some Chlorinated Pesticides in Jordanian Ground- and Surface Waters by Solid-Phase Extraction and Mass Spectrometric Detection- A Method development." Thesis, Linköping University, Department of Water and Environmental Studies, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-2253.

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<p>A solid-phase extraction (SPE) method was developed for the determination of organochlorine pesticides, namely aldrin, alpha-BHC, beta-BHC, delta-BHC, dieldrin, endosulfan I, endosulfan II, endosulfan sulfate, endrin, endrin aldehyde, lindane, heptachlor, heptachlor epoxide, 4,4’-DDD, 4,4’-DDE and 4,4’- DDT in water. The effect of extraction conditions, such as the addition of sodium chloride and methanol to the sample prior to loading was studied. The sample was concentrated by a plain polystyrene-divinylbenzene resin, and the extract was eluted by ethyl acetate. Qualification and quantifi

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44

Rasel, Rafiul Karim. "Toward Imaging of Multiphase Flows using Electrical Capacitance Tomography." The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu155715027714914.

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45

George, Lyci. "Structural Characterization of Metal Hydrides for Energy Applications." FIU Digital Commons, 2010. http://digitalcommons.fiu.edu/etd/233.

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Hydrogen can be an unlimited source of clean energy for future because of its very high energy density compared to the conventional fuels like gasoline. An efficient and safer way of storing hydrogen is in metals and alloys as hydrides. Light metal hydrides, alanates and borohydrides have very good hydrogen storage capacity, but high operation temperatures hinder their application. Improvement of thermodynamic properties of these hydrides is important for their commercial use as a source of energy. Application of pressure on materials can have influence on their properties favoring hydrogen st

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46

Li, Zhaobin. "Two-phase spectral wave explicit Navier-Stokes equations method for wave-structure interactions." Thesis, Ecole centrale de Nantes, 2018. http://www.theses.fr/2018ECDN0041/document.

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Cette thèse propose un algorithme efficace pour la simulation numérique des interactions houle-structure avec des solveurs CFD bi-phasiques. L'algorithme est basé sur le couplage de la théorie potentielle et des équations bi-phasiques de Navier-Stokes. C'est une extension de la méthode Spectral Wave Explicit Navier-Stokes Equations (SWENSE) pour les solveurs CFD bi-phasiques avec une technique de capture d'interface. Dans cet algorithme, la solution totale est décomposée en une composante incidente et une composante complémentaire. La partie incidente est explicitement obtenue avec des méthode

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47

Dalton, John Christian. "Surface Hardening of Duplex Stainless Steel 2205." Case Western Reserve University School of Graduate Studies / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=case1480696856644048.

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48

Coppari, Gian Marco. "Decomposizione spinodale: analisi del processo e simulazione numerica." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2020. http://amslaurea.unibo.it/21631/.

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Il seguente elaborato di tesi è rivolto a dare una descrizione del tutto generale al fenomeno della decomposizione spinodale sulla base dei meccanismi microscopici della diffusione. Attraverso una opportuna correzione della equazione di diffusione di Fick è stata ricavata l'equazione di Cahn-Hilliard, che permette la descrizione corretta del fenomeno diffusivo. Il processo di deduzione dell'equazione passa per la determinazione del profilo di concentrazione all'interfaccia di due fasi come strumento di minimizzazione dell'energia interna del sistema e quindi come procedimento per raggiungere u

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49

Rönnby, Karl. "A computational study on indium nitride ALD precursors and surface chemical mechanism." Thesis, Linköpings universitet, Kemi, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-144426.

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Indium nitride has many applications as a semiconductor. High quality films of indium nitride can be grown using Chemical Vapour Deposition (CVD) and Atomic Layer Deposition (ALD), but the availability of precursors and knowledge of the underlaying chemical reactions is limited. In this study the gas phase decomposition of a new indium precursor, N,N-dimethyl-N',N''-diisopropylguanidinate, has been investigated by quantum chemical methods for use in both CVD and ALD of indium nitride. The computations showed significant decomposition at around 250°C, 3 mbar indicating that the precursor is uns

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50

Zhang, Li. "The study of phase separation in the miscibility gap and ion specific effects on the aggregation of soft matter system." Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLS106/document.

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Le procédé de séparation de phase est importante car elle détermine la structure des matériaux finaux. Il existe de nombreux systèmes qui ont plus d'une phase tels que des mousses et des gels. Les mousses sont des dispersions aqueuses de bulles de gaz dans une phase aqueuse et gels apparaissent lorsque certains microscopique unité de base commence à se rassembler formant un grand réseau solide qui enjambe l'espace macroscopique. Ils ont de nombreuses applications dans l'industrie et la vie quotidienne. Dans cette thèse, tout d'abord, je me concentre sur l'étude de différents types de séparatio

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