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Dissertations / Theses on the topic 'High temperature'

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1

Wu, Xu. "Development of high temperature PEMFC and high temperature PEMWE." Thesis, University of Newcastle Upon Tyne, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.555981.

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Polymer electrolyte membrane fuel cells (PEMFC) and polymer electrolyte membrane water electrolysers (PEMWE) are promising electrochemical energy conversion devices. This thesis describes research carried out on high temperature PEMFC and PEMWE. High temperature (> 100 QC) operation is one of the most topical research trends of PEMFC and PEMWE, because of the operational and kinetic advantages it can provide. In this research, an anhydrous solid electrolyte, Sb-doped SnP207 was prepared and characterized. The synthesis parameters, microstructure, and conductivity of Sb-doped SnP207 were studie
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2

Patterson, Peter A. "High temperature cyclones." Thesis, McGill University, 1989. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=75974.

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Gas-solids separation was studied in a 102 mm diameter conventional cyclone operated with air heated to temperatures between 300 K and 2 000 K. Cyclone pressure drops, fractional and overall collection efficiencies were measured as functions of temperature, gas throughput, dust loading and cyclone geometry. Alumina and silica of 100% less than 44 $ mu$m mass median diameter were used as test dusts. Inlet velocities ranged from 3 to 42 m/s and inlet dust loadings were between 0.3 and 235 g/m$ sp3$.<br>Empirical models were derived to correlate the experimental results for the cyclone collection
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3

Black, Victoria J. "High temperature supercapacitors." Thesis, Loughborough University, 2013. https://dspace.lboro.ac.uk/2134/12490.

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The scientific objective of this research program was to determine the feasibility of manufacturing an ionic liquid-based supercapacitor that could operate at temperatures up to 220 °C. A secondary objective was to determine the compatibility of ionic liquids with other cell components (e.g. current collectors) at high temperature and, if required, consider means of mitigating any problems. The industrial motivation for the present work was to develop a supercapacitor capable of working in the harsh environment of deep offshore boreholes. If successful, this technology would allow down-hole te
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4

Hernandez, Sinuhe. "High Temperature Wear Processes." Licentiate thesis, Luleå tekniska universitet, Maskinelement, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-16827.

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Moving machine assemblies are increasingly exposed to extreme operating conditions involving high temperatures owing to demands on higher power densities, high performance/efficiency and extreme environments. The changes in surface and near surface properties of contacting surfaces caused by exposure to high temperature and deformation govern the occurrence of friction, wear and material transfer of the tribological system. However, these changes have not been thoroughly investigated. In order to enable development of new products and processes, there is a need for new knowledge pertaining to
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5

Lev, Leonid C. (Leonic Charles). "High temperature ceramic composites." Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/38078.

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6

Heczko, Milan. "High Temperature Deformation Mechanisms." Doctoral thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2018. http://www.nusl.cz/ntk/nusl-391818.

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Dvě pokročilé vysoce legované austenitické oceli s Fe-Ni-Cr matricí byly studovány za podmínek nízkocyklové únavy jak za pokojové tak vysoké teploty. Široká škála experimentálních a charakterizačních nástrojů byla použita ke studiu vzájemně souvisejících aspektů zahrnujících chemické složení slitin, mikrostrukturu, deformační mechanismy a celkovou odezvu materiálů na externě působící zatížení. Klíčové mechanismy a faktory definující mechanické vlastnosti a výkonnost v reálném provozu byly analyzovány a diskutovány v souvislosti s materiálovým designem. • Standardní únavové experimenty byly pro
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7

Hout, S. R. in't. "High-temperature silicon sensors." Delft, the Netherlands : Delft University Press, 1996. http://books.google.com/books?id=dApTAAAAMAAJ.

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8

Ohi, Shugo. "High temperature orthorhombic pyroxene --Phase transition between low and high temperature orthorhombic pyroxene and phase relation in enstatite-diopside system at high temperature--." 京都大学 (Kyoto University), 2009. http://hdl.handle.net/2433/124430.

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9

Xu, Juncheng. "High Temperature High Bandwidth Fiber Optic Pressure Sensors." Diss., Virginia Tech, 2005. http://hdl.handle.net/10919/25988.

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Pressure measurements are required in various industrial applications, including extremely harsh environments such as turbine engines, power plants and material-processing systems. Conventional sensors are often difficult to apply due to the high temperatures, highly corrosive agents or electromagnetic interference (EMI) noise that may be present in those environments. Fiber optic pressure sensors have been developed for years and proved themselves successfully in such harsh environments. Especially, diaphragm based fiber optic pressure sensors have been shown to possess advantages of high sen
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10

Giordano, Valentina. "High-pressure high-temperature phases of carbon dioxide." Paris 6, 2006. http://www.theses.fr/2006PA066529.

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11

Norrby, Niklas. "High pressure and high temperature behavior of TiAlN." Licentiate thesis, Linköpings universitet, Nanostrukturerade material, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-78830.

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This licentiate thesis mainly reports about the behavior of arc evaporated TiAlN at high pressures and high temperatures. The extreme conditions have been obtained in metal cutting, multi anvil presses or diamond anvil cells. Several characterization techniques have been used, including x-ray diffraction and transmission electron microscopy. Results obtained during metal cutting show that the coatings are subjected to a peak normal stress in the GPa region and temperatures around 900 °C. The samples after metal cutting are shown to have a stronger tendency towards the favorable spinodal decomp
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12

Palmer, C. J. "High temperature creep of copper." Thesis, Swansea University, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.638403.

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The key observations that have underpinned traditional power law approaches to creep mechanism identification have been re-evaluated using information obtained for pure copper and aluminium, and also for various other metals and alloys. Specifically, data is presented which show stress/creep rate plots for copper and aluminium over extended stress ranges to be well represented by continuous curves, contradicting the common assumption that a transition in mechanisms occurs as the stress is reduced. Data is also presented from a series of stress interruption tests on pure copper, with strain/str
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13

Miles, Bryan Ernest. "High Temperature Nuclear Reactor Dynamics." Thesis, Imperial College London, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.520877.

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14

Saran, Mohinder. "High temperature strengthening of zirconia." Thesis, University of Oxford, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.504522.

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15

Kale, K. S. "High temperature superconducting microwave devices." Thesis, University of Oxford, 1996. http://ora.ox.ac.uk/objects/uuid:85481181-0e9f-41e4-8f26-71cb51fe7ca8.

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This thesis describes investigations into the application of high temperature superconductoR<sub>s</sub>(HTS) for microwave devices. The ultimate aim of this research was to produce HTS components that would demonstrate the commercial potential of their use in spacecraft such as satellites or in base stations for terrestrial cellular communication systems. During the course of this research the surface resistance (R<sub>s</sub>) of HTS thick and thin films deposited onto different substrates has been measured by a variety of techniques. These have been compared and contrasted with each other.
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16

Lee, Te-Hao. "Silicon Carbide High Temperature Logic." Case Western Reserve University School of Graduate Studies / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=case1283437983.

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17

Marsh, M. G. "The effect of a temperature gradient on high temperature fretting wear." Thesis, University of Nottingham, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.267625.

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18

Bloom, Scott Harris. "Superconducting and normal compounds : some high field/high pressure effects /." Thesis, Connect to Dissertations & Theses @ Tufts University, 1989.

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Thesis (Ph.D.)--Tufts University, 1989.<br>Submitted to the Dept. of Physics. Includes bibliographical references (leaves 192-204). Access restricted to members of the Tufts University community. Also available via the World Wide Web;
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19

Xia, Xiangjun. "Theoretical investigation of high-Tc cuprate superconductors using t-J model : transport properties /." View abstract or full-text, 2005. http://library.ust.hk/cgi/db/thesis.pl?PHYS%202005%20XIA.

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20

Fang, Yue. "Interfacial studies of high temperature superconducting Bi₂Sr₂Can-₁Cun 0₂n+₄ and Ag." Diss., Georgia Institute of Technology, 1995. http://hdl.handle.net/1853/17890.

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21

Vanpeteghem, Carine B. "High-pressure high-temperature structural studies of binary semiconductors." Thesis, University of Edinburgh, 2000. http://hdl.handle.net/1842/11496.

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The last decade has seen a tremendous improvement in high-pressure diffraction techniques. Among other things, this has led to a completely new understanding of the structural systematics of the group IV, III-V and II-VI semiconductors. Many phases have been shown to have more complex, lower-symmetry, high-pressure structures than previously thought. One of the most surprising discoveries has been the non-existence of the diatomic <i>b</i>-tin structure, long believed to be one of the principal high-pressure phases of the III-V and II-VI systems. However, most of the work to date has been perf
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22

Sphicas, Panagiotis. "High pressure and high temperature measurements on diesel sprays." Thesis, Imperial College London, 2013. http://hdl.handle.net/10044/1/18063.

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Environmental, financial and legal reasons demand the development of cleaner diesel engines. Atomization, evaporation and mixing phenomena observed during injection of Diesel fuel affect the produced emissions. To study these phenomena, under engine-like conditions (50bar, 1000K), a chemically preheated constant volume chamber was built. A system of sensors, driven in real-time by a FPGA (Field Programmable Gate Array) and controlled by a Real Time Controller, was built to monitor and control the operations. A modern common rail fuel injection system (Bosch CP3) was driven by a purpose-modifie
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23

Almström, Linda, and Camilla Söderström. "Alternative materials for high-temperature and high-pressure valves." Thesis, Karlstads universitet, Fakulteten för teknik- och naturvetenskap, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-7393.

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AB SOMAS Ventiler manufactures valves for different applications. A valve of type DN VSSL 400, PN 100, used in high-temperature and high-pressure applications was investigated in this thesis. This type of valve is coated with high cobalt alloys to achieve the tribological properties needed for this severe condition. However there is a request from AB Somas Ventiler to find another solution. This request is based on the fact that demands on higher temperatures, from customers, yields higher requirements on the material. It is also a price issue since cobalt is quite expensive. Materials investi
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24

Rowane, Aaron J. "High-Temperature, High-Pressure Viscosities and Densities of Toluene." VCU Scholars Compass, 2016. http://scholarscompass.vcu.edu/etd/4188.

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High-temperature, high-pressure (HTHP) conditions are exemplified in ultra-deep petroleum reservoirs and can be exhibited within diesel engines. Accurate pure component hydrocarbon data is essential in understanding the overall behavior of petroleum and diesel fuel at these conditions. The present study focuses on the HTHP properties of toluene since this hydrocarbon is frequently used to increase the octane rating of gasoline and toluene occurs naturally in crude oil. In this thesis experimental densities and viscosity are presented to 535 K and 300 MPa extending the database of toluene visco
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25

Munro, Keith Alistair. "High-pressure high-temperature behaviour of the lanthanide metals." Thesis, University of Edinburgh, 2017. http://hdl.handle.net/1842/28881.

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The high-pressure behaviour of the lanthanide series of metals has been the subject of study since the work of Percy Bridgman in the 1940s. Differences in said behaviour between the different lanthanide metals are attributed to the increasing occupation of the 4f electron shell as Z increases. Upon compression, or as Z decreases, the trivalent lanthanides (La to Lu, excluding Eu and Yb) undergo a common phase transformation sequence through various close packed structures: hcp → Sm-type (the structure adopted by samarium at ambient conditions) → dhcp → fcc → distorted fcc (d-fcc). Upon further
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26

Fang, Xiaojun. "Sapphire fiber based high temperature extensometer." Master's thesis, This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-01262010-020150/.

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27

Alépée, Christine. "Technologies for high-temperature silicon microreactors /." Lausanne, 2000. http://library.epfl.ch/theses/?nr=2298.

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28

Ersson, Anders. "Materials for High-Temperature Catalytic Combustion." Doctoral thesis, KTH, Chemical Engineering and Technology, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3501.

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<p>Catalytic combustion is an environmentally friendlytechnique to combust fuels in e.g. gas turbines. Introducing acatalyst into the combustion chamber of a gas turbine allowscombustion outside the normal flammability limits. Hence, theadiabatic flame temperature may be lowered below the thresholdtemperature for thermal NO<sub>X</sub>formation while maintaining a stable combustion.However, several challenges are connected to the application ofcatalytic combustion in gas turbines. The first part of thisthesis reviews the use of catalytic combustion in gas turbines.The influence of the fuel has
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29

Martin, Marianne. "High-Temperature Superconductivity in Doped BaFe2As2." Diss., lmu, 2011. http://nbn-resolving.de/urn:nbn:de:bvb:19-126344.

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30

Everett, John. "Dissipation in high temperature superconducting tapes." Thesis, Imperial College London, 1998. http://hdl.handle.net/10044/1/8576.

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31

Ekström, Mattias. "High Temperature Memories in SiC Technology." Thesis, KTH, Skolan för informations- och kommunikationsteknik (ICT), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-177192.

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This thesis is part of the Working On Venus (WOV) project. The aim of the project is to design electronics in silicon carbide (SiC) that can withstand the extreme surface environmen  of Venus. This thesis investigates some possible computer memory technologies that could survive on the surface of Venus. A memory must be able to function at 460 °C and after a total radiation dose of at least 200 Gy (SiC). This thesis is a literature survey. The thesis covers several Random-Access Memory (RAM) technologies: Static RAM (SRAM), Dynamic RAM (DRAM), Ferroelectric RAM (FeRAM), Magnetic RAM (MRAM), Re
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32

Gay, Pierre. "Ultrafast processes in high temperature superconductors." Thesis, University of Oxford, 2000. https://ora.ox.ac.uk/objects/uuid:140cc366-58a1-41ad-919b-2cb5f65c3fe9.

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Using time-resolved photo-induced reflectivity, we reported for the first time a systematic work on the ultrafast response of Bi<sub>2</sub>Sr<sub>2</sub>CaCu<sub>2</sub>O<sub>8+δ</sub> (BSCCO-2212) and Tl<sub>2</sub>Ba<sub>2</sub>CuO<sub>6+δ</sub> (TBCO-2201), measurements of detwinned YBa<sub>2</sub>Cu<sub>3</sub>O<sub>7-δ</sub> (YBCO-123) single crystal with the electric field ̲E parallel to the a and b-axis and high-resolution measurements of the rising edge dynamics of YBCO-123 thin films. We identified similar photo-induced responses for BSCCO, TBCO and for YBCO with ̲E ⊥ ̲b, whi
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33

Barrie, Scott Bernard. "Magnetic properties of high temperature superconductors." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape15/PQDD_0006/MQ32467.pdf.

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34

Huang, Jiachang. "A helium high-temperature drift chamber." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape9/PQDD_0013/NQ38900.pdf.

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35

Davis, Caitlin. "Sigma delta modulation at high temperature." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/mq64995.pdf.

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36

Elm, Svensson Erik. "Nanomaterials for high-temperature catalytic combustion." Licentiate thesis, Stockholm : School of Chemical Science, KTH, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4360.

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37

Lidmar, Jack. "Phase transitions in high-temperature superconductors." Doctoral thesis, Stockholm : Tekniska högsk, 1998. http://www.lib.kth.se/abs99/lidm0111.pdf.

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38

Li, Su. "Phase transitions of high temperature superconductors." College Park, Md. : University of Maryland, 2007. http://hdl.handle.net/1903/7276.

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Thesis (Ph. D.) -- University of Maryland, College Park, 2007.<br>Thesis research directed by: Physics. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.
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39

Koob, Christopher E. "High temperature fiber optic strain sensing." Thesis, This resource online, 1991. http://scholar.lib.vt.edu/theses/available/etd-02132009-171339/.

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40

Crumley, Winfred H. Jr. "Supersonic expansion from high-temperature sources." Diss., Georgia Institute of Technology, 1985. http://hdl.handle.net/1853/27447.

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41

Wade, James Matthew. "Calorimetry studies of high temperature superconductors." Thesis, University of Cambridge, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.363078.

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42

Nicolson, David Macnab. "Scuffing at high speed and temperature." Thesis, Imperial College London, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.243521.

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43

Bianchi, Giovanni. "Ultrafast phenomena in high-temperature superconductors." Thesis, University of Oxford, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.410319.

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44

Jenkins, A. P. "Microwave applications of high temperature superconductors." Thesis, University of Oxford, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.259904.

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45

Richens, P. E. "High temperature superconductors in electromagnetic applications." Thesis, University of Oxford, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.365792.

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46

Potter, Darren James. "The Joining of High Temperature Alloys." Thesis, University of Liverpool, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.507706.

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47

Mills-Brown, Joseph. "High temperature composite materials and structures." Thesis, University of Bristol, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.617589.

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The recent resurgence and growing interest in high temperature structures to maximise design space and performance in motorsport applications, led to the need for greater understanding of high temperature composite materials. This study aimed to investigate suitable materials for high temperature structures with application to the motorsport environment. Composite materials were quickly identified as the most appropriate materials given the needs of motorsport, with polysialate composites championed after a thorough review of available materials. A commercially available composite reinforced w
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48

Lapthorn, Andrew Craig. "High Temperature Superconducting Partial Core Transformers." Thesis, University of Canterbury. Electrical and Computer Engineering, 2012. http://hdl.handle.net/10092/7130.

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The thesis begins by providing an introduction to transformer theory. An ideal transformer is examined first, followed by full core transformer theory. The partial core transformer is then introduced and compared to the full core design. An introduction to superconductors is then presented where a simplified theory of superconductivity is given. High temperature superconductors are then examined including their physical structure, superconducting properties and the design of the superconducting wire. The early development of high temperature superconducting partial core transformers at the Un
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49

Lekholm, Ville. "High-Temperature Microfluidics for Space Propulsion." Doctoral thesis, Uppsala universitet, Mikrosystemteknik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-246057.

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In this thesis, microfabrication methods and tools for analysis of heated cold-gas microthrusters are presented, with the aim of improving their reliability and performance. Cold-gas thrusters operate by accelerating pressurized gas through a nozzle. These thruster systems are very straightforward in both design and operation, relying on little more than a pressurized tank, a valve, and a nozzle. This makes them suitable for miniaturization, enabling their use on very small spacecraft. However, an inherent drawback with cold-gas thrusters is their low propellant efficiency – in thrusters known
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50

Greer, Caroline J. "Spectral emission from high temperature plasmas." Thesis, Queen's University Belfast, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.337035.

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