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Dissertations / Theses on the topic 'Interfacial degradation'

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1

Keat, Loh Wei. "Modelling interfacial degradation in adhesively bonded structures." Thesis, University of Surrey, 2002. http://epubs.surrey.ac.uk/798102/.

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2

Chen, Ping. "Interfacial degradation of carbon fibre reinforced polyetheretherketone, PEEK." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/MQ29373.pdf.

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3

Liljedahl, Carl David Mortimer. "Modelling the interfacial degradation in adhesively bonded joints." Thesis, University of Surrey, 2006. http://epubs.surrey.ac.uk/773028/.

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The aim of the research was to develop predictive models for the interfacial degradation of adhesively bonded joints when exposed to aggressive environmental conditions. Four different joint configurations using the same adhesive system were exposed to a variety of conditions including immersion at 50°C, 96%RH at 50°C and 80%RH at 70°C. In addition data from joints for other adhesive systems were also incorporated into the investigation. Moisture has a degrading effect on the strength of adhesively bonded joints. Therefore the diffusion into the bulk material was determined by gravimetric expe
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4

Bastidas, Erazo Pablo Daniel. "Degradation of composite insulators at material interfaces." Thesis, University of Manchester, 2018. https://www.research.manchester.ac.uk/portal/en/theses/degradation-of-composite-insulators-at-material-interfaces(69477a7e-9cc1-496e-a527-4bb64488493d).html.

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High-voltage (HV) outdoor composite insulators used in transmission lines are made of two polymers, comprising the core and housing, bonded together with metallic end-connections. The interface between these polymers is parallel to the electric field, which makes the insulators more prone to interfacial problems at these common points [1]. If interfacial ageing occurs, degradation and catastrophic breakdown can result [2]. Therefore, the design reliability of outdoor composite insulators depends on the high-strength bond between the core and the housing [3],[4]. Research findings by Kutil and
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5

Greenbank, William. "Interfacial stability and degradation in organic photovoltaic solar cells." Thesis, Bordeaux, 2016. http://www.theses.fr/2016BORD0338/document.

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Les durées de vie des cellules solaires photovoltaïques organiques (OPV) doivent être améliorées afin que cette technologie puisse être commercialisée sur une grande échelle. Ce travail étudie l’influence de la sélection des matériaux pour l’interface supérieure sur la dégradation des OPV inversées. La première partie de cette étude s’occupe des effets de la dégradation thermale. Il a été constaté que la tension de circuit-ouvert (VOC) et le facteur de forme (FF) diminuent lors du vieillissement des OPVs ayant une HTL de MoO3 et une électrode d’argent. Des expériences de caractérisation physiq
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6

Li, Junhong. "Elastic - plastic interfacial crack problems." Thesis, University of Glasgow, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.297517.

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7

Lemire, Heather M. "Degradation of Transparent Conductive Oxides: Mechanistic Insights and Interfacial Engineering." Case Western Reserve University School of Graduate Studies / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=case1386325661.

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8

Fitzpatrick, Matthew F. "The interfacial chemistry and environmental degradation of adhesively bonded galvanised steel." Thesis, University of Surrey, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.322539.

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9

Cumpston, Brian Hylton. "Bulk and interfacial degradation of polymers used for electronic and photonic applications." Thesis, Massachusetts Institute of Technology, 1996. http://hdl.handle.net/1721.1/10634.

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10

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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11

Fraga, Domínguez Isabel. "Identification of the degradation mechanisms of organic solar cells : active layer and interfacial layers." Thesis, Aston University, 2016. http://publications.aston.ac.uk/28863/.

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Organic Solar Cells (OSCs) represent a photovoltaic technology with multiple interesting application properties. However, the establishment of this technology into the market is subject to the achievement of operational lifetimes appropriate to their application purposes. Thus, comprehensive understanding of the degradation mechanisms occurring in OSCs is mandatory in both selecting more intrinsically stable components and/or device architectures and implementing strategies that mitigate the encountered stability issues. Inverted devices can suffer from mechanical stress and delamination at th
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12

Fraga, Dominguez Isabel. "Identification of the degradation mechanisms of organic solar cells : active layer and interfacial layers." Thesis, Clermont-Ferrand 2, 2015. http://www.theses.fr/2015CLF22639/document.

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La faible durée de vie des cellules solaires organiques constitue un frein à leur développement commercial. Dans ce contexte, ce travail de thèse a été consacré à l’amélioration de la résistance mécanique des cellules d’une part, et d’autre part à l’étude de leur stabilité chimique sous l’impact de la lumière. Concernant le premier axe de recherche, nous avons proposé la synthèse de nouveaux copolymères à blocs (P3HT-b-P(R)SS) susceptibles d’améliorer l’adhésion entre la couche active (P3HT:PCBM) et la couche qui transporte les trous (PEDOT:PSS) dans des dispositifs inverses. Puis, concernant
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13

Li, Juchuan. "UNDERSTANDING DEGRADATION AND LITHIUM DIFFUSION IN LITHIUM ION BATTERY ELECTRODES." UKnowledge, 2012. http://uknowledge.uky.edu/cme_etds/12.

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Lithium-ion batteries with higher capacity and longer cycle life than that available today are required as secondary energy sources for a wide range of emerging applications. In particular, the cycling performance of several candidate materials for lithium-ion battery electrodes is insufficient because of the fast capacity fading and short cycle life, which is mainly a result of mechanical degradation. This dissertation mainly focuses on the issue of mechanical degradation in advanced lithium-ion battery electrodes. Thin films of tin electrodes were studied where we observed whisker growth as
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14

Kartal, Önder. "The role of interfacial and 'entropic' enzymes in transitory starch degradation : a mathematical modeling approach." Phd thesis, Universität Potsdam, 2011. http://opus.kobv.de/ubp/volltexte/2011/5394/.

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Plants and some unicellular algae store carbon in the form of transitory starch on a diurnal basis. The turnover of this glucose polymer is tightly regulated and timely synthesis as well as mobilization is essential to provide energy for heterotrophic growth. Especially for starch degradation, novel enzymes and mechanisms have been proposed recently. However, the catalytic properties of these enzymes and their coordination with metabolic regulation are still to be discovered. This thesis develops theoretical methods in order to interpret and analyze enzymes and their role in starch degradatio
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15

Kaya, Figen. "Effects of increased interfacial strength on the fatigue crack growth resistance, crack opening displacements and interfacial and fibre strength degradation in a Ti β 21S/SCS 6 composite." Thesis, University of Birmingham, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.289444.

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16

Ripollés, Sanchis Teresa. "Interfacial and Bulk Operation of Polymeric Solar Cells by Optoelectronics and Structural Techniques." Doctoral thesis, Universitat Jaume I, 2014. http://hdl.handle.net/10803/277095.

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This Ph.D. Thesis focuses on the investigation of organic photovoltaic (OPV) technology, especially in aspects of experimental device processing, and optoelectronic and electrical characterization on OPV devices to be readily marketable. More specifically, the topics addressed are the following: origin of recombination current,open-circuit voltage and crystallinity, transport driving force, contact selectivity and interface states, alternative hole transporting layers and oxygen and degradation routes.
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17

Kartal, Önder Verfasser], and Joachim [Akademischer Betreuer] [Selbig. "The role of interfacial and 'entropic' enzymes in transitory starch degradation : a mathematical modeling approach [[Elektronische Ressource]] / Önder Kartal. Betreuer: Joachim Selbig." Potsdam : Universitätsbibliothek der Universität Potsdam, 2011. http://d-nb.info/101569375X/34.

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18

Oka, Mihir Anil. "PLA and cellulose based degradable polymer composites." Diss., Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/33829.

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We studied PLA-microcrystalline cellulose composites, focusing on the effects of processing, particle size and surface modification. The thermal and mechanical properties of these PLA based composites were studied and the effect of cellulose addition on PLA degradation was analyzed. For our system, the degradation rate was found to depend on initial sample crystallinity, pH of the degradation media and cellulose content of the composite. Composites were prepared using solution processing and melt mixing methods. The processing methods influenced the polymer's ability to crystallize affecting t
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19

Koç, Tuncay. "In search of the best solid electrolyte-layered oxide pair in all-solid-state batteries." Electronic Thesis or Diss., Sorbonne université, 2022. http://www.theses.fr/2022SORUS535.

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Les batteries à l'état solide (ASSB) qui reposent sur l'utilisation d'électrolytes solides (SE) à conductivité ionique élevée sont le Saint-Graal de la future technologie des batteries, car elles pourraient théoriquement permettre une augmentation de près de 70 et 40 % des densités d'énergie volumétrique (Wh/l) et gravimétrique (Wh/kg), respectivement, ainsi qu'une sécurité accrue par rapport à la technologie des batteries au lithium-ion. À cette fin, la dernière décennie a vu le développement des ASSB, principalement grâce à des SE à base de sulfure, en raison de leurs propriétés intrinsèques
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20

Alawani, Nadrah. "Structural Characterization of Synthetic Polymers and Copolymers Using Multidimensional Mass Spectrometry Interfaced with Thermal Degradation, Liquid Chromatography and/or Ion Mobility Separation." University of Akron / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=akron1386591497.

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21

Hamrat, Sonia. "Etude des échanges thermiques et conception d’un système de refroidissement pour le système de lecture du trajectographe SciFi de LHCb." Thesis, Université Clermont Auvergne‎ (2017-2020), 2017. http://www.theses.fr/2017CLFAC104/document.

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Dans le cadre de l’évolution du plus grand accélérateur circulaire de particules « LHC », un important programme de mise à niveau sur l’ensemble des détecteurs qui le constitue a été lancé. Parmi eux, on retrouve la mise à niveau du détecteur LHCb qui comprend le remplacement complet de plusieurs sous-détecteurs. La fréquence de lecture élevée de 40MHz, sans précédent dans une expérience de physique des particules, et l’environnement de rayonnement sévère lié à l’augmentation de l’intensité du LHC, sont les principaux défis à relever par les nouveaux sous-détecteurs. Le travail présenté dans c
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22

Mirkhani, Koorosh. "Characterization of interfacial degradation in adhesive joints using EMAT's." 2004. http://link.library.utoronto.ca/eir/EIRdetail.cfm?Resources__ID=94741&T=F.

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23

Yang, Chia-Chia, and 楊佳嘉. "Utilization of Guided Wave to Detect the Interfacial Bonding due to Degradation of Reinforced Concrete." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/zy5j7w.

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碩士<br>國立臺北科技大學<br>土木工程系土木與防災碩士班<br>106<br>Reinforced concrete structure is exposed to open air. High temperature or chemical environment causes the concrete cover to crack. Then, moisture or chloride intrudes into the cracks, directly contacting the reinforcement steel and causing reinforcement steel to corrode. As the crack widens, corrosion accelerates and affects the interfacial bonding between concrete and reinforcement steel. The conventional non-destructive testing (NDT) focuses on the concrete damage without discussing the internal damage occurring to the interfacial bonding between rei
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24

"Nanoscale characterization of interfacial electronic properties and degradation mechanisms of organic thin films for electroluminescence displays." 2002. http://library.cuhk.edu.hk/record=b6073503.

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by Xu Mingsheng.<br>"October 2002."<br>Thesis (Ph.D.)--Chinese University of Hong Kong, 2002.<br>Includes bibliographical references.<br>Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web.<br>Electronic reproduction. Ann Arbor, MI : ProQuest Information and Learning Company, [200-] System requirements: Adobe Acrobat Reader. Available via World Wide Web.<br>Mode of access: World Wide Web.
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25

Kirking, Bryan. "Exploring the Effects of Crosslinking on the Intervertebral Disc." Thesis, 2012. http://hdl.handle.net/1969.1/148231.

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Crosslinking soft tissue has become more common in tissue engineering applications, and recent studies have demonstrated that soft tissue mechanical behavior can be directly altered through crosslinking, but increased understanding of how crosslinking affects intervertebral disc mechanical behavior is needed. In vitro testing of bovine disc and motion segments was used to characterize several important aspects of disc behavior in response to crosslinking after both soaking and injection treatment. The first study was a comparison of different crosslinkers to determine the effect on tensile p
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26

Sautermeister, F. A., Martin Priest, P. M. Lee, and M. F. Fox. "Impact of sulphuric acid on cylinder lubrication for large 2-stroke marine diesel engines: Contact angle, interfacial tension and chemical interaction." Thesis, 2013. http://hdl.handle.net/10454/9724.

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other<br>no<br>The effect of sulphuric acid on the chemical and physical behaviour of the piston ring lubricant in a marine engine cylinder was investigated. To reveal the basic influence of H2SO4 on the lubricant film, the saturated hydrocarbon Squalane (C30H62) was chosen as a simple model oil. The interfacial tension between aqueous H2SO4 (0-98% w/w) and C30H62 was measured between -3 and 165 degrees C to understand droplet formation in the lubricant. Interfacial tension decreases with increasing acid concentration and is temperature dependent.<br>The wettability of engine parts with corros
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