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Добірка наукової літератури з теми "Thermal oxide"

Автор: Grafiati

Опубліковано: 7 червня 2022

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Статті в журналах з теми "Thermal oxide"

Senzaki, Junji, Atsushi Shimozato, Kazushige Koshikawa, Yasunori Tanaka, Kenji Fukuda, and Hajime Okumura. "Emission Phenomenon Observation of Thermal Oxides Grown on N-Type 4H-SiC (0001) Wafer." Materials Science Forum 679-680 (March 2011): 378–81. http://dx.doi.org/10.4028/www.scientific.net/msf.679-680.378.

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Photo emission phenomenon and reliability of thermal oxides grown on n-type 4H-SiC (0001) wafer have been investigated using photo emission microscope. Thermal oxides were grown by dry oxidation, and treated in nitrous oxide atmosphere as followed by hydrogen post oxidation annealing. An initial photo emission phenomenon with weak intensity exists just after stress current is applied to the thermal oxide. It is confirmed that most initial emission occurred at the same position as dielectric breakdown of the thermal oxide. Also, the initial emission phenomenon was observed in the MOS capacitors broken by extrinsic defects such as threading screw dislocations and surface defects. In addition, the photo emission due to Fowler-Nordheim tunnel current through the thermal oxide has peak intensity at 2.48 eV.

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Huang, Jin Hua, Rui Qin Tan, Jia Li, Yu Long Zhang, Ye Yang, and Wei Jie Song. "Thermal Stability of Aluminum Doped Zinc Oxide Thin Films." Materials Science Forum 685 (June 2011): 147–51. http://dx.doi.org/10.4028/www.scientific.net/msf.685.147.

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Transparent conductive oxides are key electrode materials for thin film solar cells. Aluminum doped zinc oxide has become one of the most promising transparent conductive oxide (TCO) materials because of its excellent optical and electrical properties. In this work, aluminum doped zinc oxide thin films were prepared using RF magnetron sputtering of a 4 at% ceramic target. The thermal stability of aluminum doped zinc oxide thin films was studied using various physical and structural characterization methods. It was observed that the electrical conductivity of aluminum doped zinc oxide thin films deteriorated rapidly and unevenly when it was heated up to 350 °C. When the aluminum doped zinc oxide thin films were exposed to UV ozone for a short time before heating up, its thermal stability and large area homogeneity were significantly improved. The present work provided a novel method for improving the durability of aluminum doped zinc oxides as transparent conductive electrodes in thin film solar cells.

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Deng, Hongda, Yongliang Liu, Zhen He, Xiantao Gou, Yefan Sheng, Long Chen, and Jianbing Ren. "Electrochemical corrosion resistance of thermal oxide formed on anodized stainless steel." Anti-Corrosion Methods and Materials 68, no. 2 (April 9, 2021): 105–12. http://dx.doi.org/10.1108/acmm-10-2020-2385.

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Purpose The purpose of this paper is to investigate and explain thermal oxide effect on electrochemical corrosion resistance anodized stainless steel (SS). Design/methodology/approach Electrochemical corrosion resistance of thermal oxides produced on anodized 304 SS in air at 350°C, 550°C, 750°C and 950°C in 3.5 wt.% NaCl solution have been investigated by dynamic potential polarization, EIS and double-loop dynamic polarization. Anodized 304 SS were obtained by anodization at the constant density of 1.4 mA.cm-2 in the solution containing 28.0 g.L-1H3PO4, 20.0 g.L-1C6H8O7, 200.0 g.L-1H2O2 at 70°C for 50 min. SEM and EDS had been also used to characterize the thermal oxides and passive oxide. Findings Interestingly, anodized 304SS with thermal oxide produced at 350°C displayed more electrochemical corrosion and pitting resistance than anodized 304 SS only with passive oxide, as related to the formation of oxide film with higher chromium to iron ratio. Whereas, anodized 304SS with thermal oxide formed at 950°C shows the worse electrochemical corrosion and pitting resistance among those formed at the high temperatures due to thermal oxide with least compact. Originality/value When thermally oxidized in the range of 350°C–950°C, electrochemical corrosion and pitting corrosion resistance of anodized 304 SS decrease with the increase of temperature due to less compactness, more defects of thermal oxide.

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Promakhov, Vladimir V., Svetlana P. Buyakova, Vanda Illavszky, Sergey N. Kulkov, and László A. Gömze. "Thermal expansion of oxide systems on the basis of ZrO2." Epitoanyag - Journal of Silicate Based and Composite Materials 66, no. 3 (2014): 81–83. http://dx.doi.org/10.14382/epitoanyag-jsbcm.2014.15.

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Mahalingam, Savisha, Abreeza Manap, Salmi Mohd Yunus, and Nurfanizan Afandi. "Thermal Stability of Rare Earth-PYSZ Thermal Barrier Coating with High-Resolution Transmission Electron Microscopy." Coatings 10, no. 12 (December 10, 2020): 1206. http://dx.doi.org/10.3390/coatings10121206.

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Durability of a thermal barrier coating (TBC) depends strongly on the type of mixed oxide in the thermally grown oxide (TGO) of a TBC. This study aims on discovering the effect of thermal stability in the TGO area containing mixed oxides. Two different bondcoats were studied using high-resolution transmission electron microscopy: high-velocity oxygen fuel (HVOF) and air-plasma spray (APS), under isothermal and thermal cyclic tests at 1400 °C. The HVOF bondcoats were intact until 1079 cycles. In comparison, APS failed at the early stage of thermal cycling at 10 cycles. The phase transformation of topcoat from tetragonal to the undesired monoclinic was observed, leading to TBC failure. The results showed that the presence of transient aluminas found in HVOF bondcoat helps in the slow growth of α-Al2O3. In contrast, the APS bondcoat does not contain transient aluminas and transforms quickly to α-Al2O3 along with spinel and other oxides. This fast growth of mixed oxides causes stress at the interface (topcoat and TGO) and severely affects the TBC durability leading to early failure. Therefore, the mixed oxide with transient aluminas slows down the quick transformation into alpha-aluminas, which provides high thermal stability for a high TBC durability.

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Kim, Myungjae, Jungshin Kang, Jiwoo Kim, and Jiwoong Kim. "Corrosion Protection Oxide Scale Formed on Surface of Fe-Ni-M (M = Al, Cr, Cu) Inert Anode for Molten Salt Electrolysis." Materials 15, no. 3 (January 18, 2022): 719. http://dx.doi.org/10.3390/ma15030719.

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An oxide scale formed on the surface of metal anodes is crucial for determining the overall quality of molten salt electrolysis (MSE), particularly for the durability of the anode materials. However, the material properties of oxide scales are yet to be revealed, particularly in ternary spinel oxide phases. Therefore, we investigate the mechanical and thermal properties of spinel oxides via first-principles calculations. The oxides are calculated using the models of normal (cubic) and inverse (orthorhombic) spinel compounds. The d-orbital exchange correlation potential of transition metal oxides is addressed using the generalized gradient approximation plus Hubbard U. The lattice constant, formation energy, cohesive energy, elastic modulus, Poisson’s ratio, universal anisotropy index, hardness, minimal thermal conductivity, and thermal expansion coefficient are calculated. Based on the calculated mechanical and thermal properties of the spinel compound, the Fe–Ni–Al inert anode is expected to be the most suitable oxide scale for MSE applications among the materials investigated in our study.

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Abdel Halim, K. S., M. Ramadan, A. Shawabkeh, and A. S. Alghamdi. "Thermal Techniques for the Production of Fe-M Alloys." Applied Mechanics and Materials 826 (February 2016): 105–10. http://dx.doi.org/10.4028/www.scientific.net/amm.826.105.

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The present manuscript is designed to investigate the possibility of manufacturing iron-metal alloys (Fe-M) via thermal techniques. These techniques are mainly depends on simultaneous reduction-sintering reactions of metal oxides. The reduction of metal oxides is an important property in metallurgical processes. It can be applied to M-Fe-O systems and also is used to develop inter-metallic alloys with specific properties. The produced metallic materials have wide range of applications and are characterized by unique physical and mechanical properties. The composition of the produced alloys is often a key element in optimizing their properties. Iron oxide doped another metal oxide such as nickel oxide is used as starting materials to produce metallic materials containing iron contaminated with nickel metal using thermal techniques. The sintering-reduction reactions of the composite oxide materials are investigated under different operation conditions. The experimental results show that the reduction-sintering thermal techniques are economic and promising routes for the production of different Fe-M alloys. The different factors affecting the rate of reduction such as temperature and ratio of doping materials are investigated. The results obtained are used to demonstrate the kinetics and mechanisms of reduction of metal oxides.

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Zhang, Lihui, Qiong Feng, Anmin Nie, Jiabin Liu, Hongtao Wang, and Youtong Fang. "In SituStudy of Thermal Stability of Copper Oxide Nanowires at Anaerobic Environment." Journal of Nanomaterials 2014 (2014): 1–6. http://dx.doi.org/10.1155/2014/670849.

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Many metal oxides with promising electrochemical properties were developed recently. Before those metal oxides realize the use as an anode in lithium ion batteries, their thermal stability at anaerobic environment inside batteries should be clearly understood for safety. In this study, copper oxide nanowires were investigated as an example. Several kinds ofin situexperiment methods includingin situoptical microscopy,in situRaman spectrum, andin situtransmission electron microscopy were adopted to fully investigate their thermal stability at anaerobic environment. Copper oxide nanowires begin to transform as copper(I) oxide at about 250°C and finish at about 400°C. The phase transformation proceeds with a homogeneous nucleation.

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Masson, D. P., D. J. Lockwood, and M. J. Graham. "Thermal oxide on CdSe." Journal of Applied Physics 82, no. 4 (August 15, 1997): 1632–39. http://dx.doi.org/10.1063/1.366263.

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Kobayashi, W., Y. Teraoka, and I. Terasaki. "An oxide thermal rectifier." Applied Physics Letters 95, no. 17 (October 26, 2009): 171905. http://dx.doi.org/10.1063/1.3253712.

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Дисертації з теми "Thermal oxide"

Gu, Jingjing. "Ternary Oxide Structures for High Temperature Lubrication." Thesis, University of North Texas, 2015. https://digital.library.unt.edu/ark:/67531/metadc804963/.

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In this research, a temperature dependent tribological investigation of selected ternary oxides was undertaken. Based on the promising results of previous studies on silver based ternary oxides, copper based ternary oxides were selected to conduct a comparative study since both copper and silver are located in the same group in the periodic table of the elements. Two methods were used to create ternary oxides: (i) solid chemical synthesis to create powders and (ii) sputtering to produce thin films. X-ray diffraction was used to explore the evolution of phases, chemical properties, and structural properties of the coatings before and after tribotesting. Scanning electron microscopy, Auger scanning nanoprobe spectroscopy, and X-ray photoelectron spectroscopy were used to investigate the chemical and morphological properties of these materials after sliding tests. These techniques revealed that chameleon coatings of copper ternary oxides produce a friction coefficient of 0.23 when wear tested at 430 °C. The low friction is due to the formation of copper tantalate phase and copper in the coatings. All sputtering coatings showed similar tribological properties up to 430 °C.

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Beck, Michael Peter. "Thermal conductivity of metal oxide nanofluids." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/26488.

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Thesis (Ph.D)--Chemical Engineering, Georgia Institute of Technology, 2009.
Committee Chair: Teja, Amyn S.; Committee Member: Abdel-Khalik, Said I.; Committee Member: Meredith, Carson; Committee Member: Nair, Sankar; Committee Member: Skandan, Ganesh. Part of the SMARTech Electronic Thesis and Dissertation Collection.

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Liu, Hao. "Modified thermal reduction of graphene oxide." Thesis, University of Nottingham, 2014. http://eprints.nottingham.ac.uk/14024/.

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As a strictly two-dimensional carbon material, graphene has attracted great interest in recent years due to its unique mechanical, electrical and optical properties. Currently, the principal methods for mass production of graphene are focused on the solution-based chemical redox reaction. The oxidation of graphite introduces a large amount of oxygen functional groups attached onto its basal plane or edges, which makes graphene oxide (GO) sheets hydrophilic to form stable aqueous colloids. However, the raw material graphite gradually becomes an insulator during the oxidation process as part of planar sp2-hybridized geometry transformed to distorted sp3-hybridized geometry, which loses its excellent electronic properties. As a result, reduction of GO is definitely necessary to recover its “lost” electrical conductivity for practical applications. In addition, the hydrophilic property of GO sheets allows metal oxide (MO) nanoparticles (NPs) anchoring on reduced graphene oxide (rGO) plane to fabricate MO/rGO composites with excellent electrochemical performance. However, the current preparation methods for the electrical conductive MO/rGO composites are very complicated which might have negative effects on the properties and hinder mass production. The objective of this project is to synthesize aluminium oxide (Al2O3)/rGO nanocomposites via oxygen annealing without using an Al2O3 precursor. This method establishes a very simple and efficient way to yield Al2O3 NPs on rGO plane by filtering GO dispersion through an Anodisc membrane filter with oxygen annealing, which is named oxygenally reduced graphene oxide (OrGO). The characterizations reveal that the Al2O3 NPs are formed exclusively on the edges of defective regions with uniform particle size less than 10 nm. As for the electronic properties, OrGO has a higher electrical conductivity at 7250 S m−1 with a narrower range of the electrical conductivity mostly between 6500 and 7250 S m−1, which can be due to the increase of the sp2/sp3 carbon ratio caused by the formation of Al2O3 NPs at the edges of defective regions in OrGO plane. Moreover, the formation of Al2O3 NPs maintains OrGO sheets with good hydrophilic property with a contact angle around 71.5°. The electrochemical performance of OrGO paper fabricated as electrode materials for lithium-ion batteries (LIBs) is also investigated. OrGO electrodes exhibit a high specific charge and discharge capacity at 1328 and 1364 mAh g−1. The cyclic voltammograms (CV) performance reveal that the insertion of Li+ ions begins at a very low potential around 0 V vs. Li+/Li while the extraction process begins in the range of 0.2–0.3 V. In addition, the OrGO electrode has excellent rate capability and cycling performance. The average coulombic efficiency (CE) was measured at 99.608% for 30 cycles, indicating a superior reversibility of the Li+ ion insertion/extraction process.

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James, Amy Frances. "Tin-oxide thin films by thermal oxidation." University of Western Cape, 2021. http://hdl.handle.net/11394/8239.

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>Magister Scientiae - MSc
Tin dioxide (SnO2) thin films are a worthy candidate for an electron transport layer (ETL) in perovskite solar cells, due to its suitable energy level, high electron mobility of 240 cm2 v-1 s- 1, desirable band gap of 3.6 - 4.0 eV, and ultimately proves to be suited for a low temperature thermal oxidation technique for ETL production. A variety of methods are available to prepare SnO2 thin films such as spin and dip coating and chemical bath deposition. However, the customary solid-state method, which incorporates thermal decomposition and oxidation of a metallic Sn precursor compound in an oxygen abundant atmosphere prevails to be low in cost, is repeatable and allows for large-scale processing.

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Sun, Baoguo. "Thermal Cycling of Solid Oxide Fuel Cells." Thesis, Imperial College London, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.486561.

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Solid-oxide fuel cells (SOFCs) are energy conversion devices that theoretically have the capability of producing electrical- energy for as long as the fuel and oxidant are supplied to the electrodes and perfonnance is expected for at least 40,000 hours. However, it is observed that perfonnance degrades under repeated thennal cycling conditions, which limits the practicaI.operating life of these SOFCs. Therefore, the mechanism of damage to planar and integrated planar SOFCs (IPt' SOFCs) on thennal cycling is the subject of this thesis. A detailed literature review has been carried out and a mechanical and thennal properties database of the key materials used in these SOFCs has been built up. Extensive work has been done on the residual ~tress analysis of anode-supported and inert substrate supported SOFCs. Analytical model, surface profile measurement (Talysurf) and XRD stress analysis were used to detennine t4e residual stresses in the components. From this study, it was found that the difference of thennal expansion coefficients between components in the SOFCs is the dominant source of stress during thennal cycling in the absence of significant temperature gradient. For the integrated planar SOFCs, it was found tha~ the cells degraded due to the failure of the sealing materials during cooling. For anode supported planar SOFCs, the electrolyte (YSZ) is under high compressive stress when cooling from sintering or operating temperature to room temperature and the anode is under very small tensile stress. The results from theoretical analysis, XRD stress measurement and literature were compared and found that they agreed with each other quite well.

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Dong, Shuhong. "Effects of Thermal Gradient and Cyclic Oxidation on the Delamination and Lifetime of High Temperature Protective Coatings." Thesis, Université d'Ottawa / University of Ottawa, 2018. http://hdl.handle.net/10393/38334.

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Thermal barrier coatings have been widely used to provide thermal protection to components in the hot section of gas turbines. This research focuses on two influencing factors on coating behavior: thermal gradient and cyclic oxidation. The delamination mechanics under thermal gradient is analyzed, taking thermally grown oxide into consideration. Coatings experience thermal gradients at different stages during actual service flight. One is due to engine power shut down when landing and the other due to internal cooling of the substrate. Thermally grown oxide (TGO) also acts as a critical factor in delamination mechanics. The induced stress gradient and corresponding energy release rate for interface delamination and shallower delamination are presented. Mechanism maps that explain the criteria for preventing delamination from developing and propagating are established. Three cooling trajectories are envisaged to analyze the variation in the possibility of delamination. Multilayer coatings used in components of the hot section of aero turbine engines also experience cyclic temperature variation during flight cycles. As experiment conditions vary and coating performance is improved, the time required to run through the test of coating failure can be both time-consuming and prohibitive. Therefore, protocols providing prediction of quantified coating behavior are in demand to shorten life-time tests. Curves of mass change are obtained from quantifying scale growth and loss by different models such as Cyclic Oxidation Spall Program (COSP). A modification is made by combining COSP and a mechanic based model to obtain critical parameters for lifetime prediction from short time experiment. The time for coatings to reach peak temperature during cycling is discovered to influence prominently on modeling results. Predictions for several coating compositions and cycling conditions are consistent with the data from the existing experiments of the coating system.

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Tang, Xiaoli Dong Jianjun. "Theoretical study of thermal properties and thermal conductivities of crystals." Auburn, Ala, 2008. http://repo.lib.auburn.edu/EtdRoot/2008/SUMMER/Physics/Dissertation/Tang_Xiaoli_9.pdf.

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Zhou, Linghe. "Non-thermal plasma technology for nitric oxide removal." Thesis, University of Strathclyde, 2018. http://digitool.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=29440.

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Non-thermal plasma, as a potential nitric oxide (NO) removal technology, has been researched for more than one decade. The advantage of direct non-thermal plasma treatment is that it is able to generate reactive species from the existing components in the flue gas without additional catalyst, oxidant or reductant, so any NO removal system based upon this technology is simple and easy to operate. However, the energy efficiency of non-thermal plasma technology is lower than the most commonly used selective catalytic reduction system for NO removal. In order to understand the possible reasons, it is important to investigate the mechanism of NO removal by direct non-thermal plasma treatment. Two of the most commonly used non-thermal plasma sources, dielectric barrier discharge (DBD) and corona discharge, are investigated. The most important reactive species include oxygen atom (O), ozone (O3) and hydroxyl radical (OH). Different reactive species lead to different chemical reaction pathways for NO removal. Under different NO concentration and discharge configurations, the dominant reactive species was found to change from one to another. For dielectric barrier discharge, when the initial NO concentration was higher than 420 ppm under dry condition, it was found that O was the dominant reactive species for NO oxidation and NO oxidation was independent on O2 concentration. When initial NO concentration was lower than 100 ppm under dry condition, it was found that O3 was the dominant reactive species and NO oxidation was dependent on O2 concentration. When NO concentration was in the range of 120 ppm to 190 ppm, there was a synergistic effect of O and O3 on NO oxidation. NO removal depended on the initial NO concentration. However, no matter what the initial NO concentration was, the NO removal energy efficiency was lower than 25g/kWh. When water vapour (H2O) was introduced into the gas mixture, reactive species OH was generated and provided an alternative chemical reaction pathway for NO removal. When initial NO concentration was 1000 ppm, NO removal was in the range of 150 ppm to 200 ppm, but the energy efficiency was in the range of 7 to 12 g/kWh. With an increase of temperature in DBD reactor, the effect of OH on NO removal was promoted. To further investigate the OH effect, a novel pin to water corona discharge configuration was used. The effect of discharge modes from Trichel pulse, pulseless and arc discharge was investigated. Under arc discharge mode, 200 ppm NO was generated at 6W discharge power. Under Trichel and pulseless discharge modes, NO removal increased with increasing discharge power. When initial NO concentration was 1000 ppm, the highest NO removal achieved was 715 ppm with 5.5 g/kWh energy efficiency. In addition, it was found that the energy efficiency did not reduce with increasing discharge power. In order to increase the possibility of chemical reaction between NO and reactive species, higher initial NO concentration was used. To obtain higher NO concentration a process of NO absorption by activated carbon and thermal desorption was used. This increased the NO concentration from 1000 ppm up to 6%. It is found that at 6% level, NO could be partially oxidized by oxygen molecule (O2) and higher O2 concentration would obtain higher NO oxidation rate. Direct non-thermal plasma treatment can be used for NO removal but the energy efficiency (less than 30g/kWh) is too low to compete with the mature technologies including selective catalytic reduction (SCR) and low temperature oxidation (LoTOx) whose energy efficiencies are higher than 60 g/kWh. Although the energy efficiency is not improved in this research, the mechanism and chemical reaction pathways of NO removal are quantitatively analysed under different initial NO concentration levels by two different non-thermal plasma technologies (DBD and corona discharge). The dominant reactive species for NO removal can shift from O, O3 to OH. In addition, a novel technology which is a combination of non-thermal plasma, NO absorption and desorption processes is developed in this research. It offers a new mechanism for NO removal, because increasing the concentration of NO from ppm level to a few percentages creates a regime where NO removal can be effectively done by O2 rather than strong oxidants like O and O3. As the formation of O and O3 is more expensive than that of O2, this is a promising research direction for NO removal. However, based on the investigation in this research, some challenges are found. One is the poor selection between NO and H2O for activated carbon and the other one is high energy consumption for the desorption process.

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Yeandel, Stephen. "Atomistic simulation of thermal transport in oxide nanomaterials." Thesis, University of Bath, 2015. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.687351.

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The aim of this work has been to use atomistic computer simulation methods to calculate the thermal conductivity and investigate factors that will modify the behaviour when applied to three different oxide materials: MgO, SiO2 and SrTiO3. These were chosen as they represent distinct classes of materials and are substrates for thermoelectric devices, where one of the primary goals is to tailor the system to reduce the thermal conductivity. Chapter 1 introduces thermoelectric concepts, gives a background of the theory and a review of various important thermoelectric materials. In Chapter 2 an overview of the interatomic interactions is presented along with details on the implementation of these interactions in a simulation of a 3D periodic crystal. Chapter 3 outlines the importance of phonon processes in crystals and several approaches to the calculation of thermal conductivity are presented. MgO results are given in Chapter 4. Both the Green-Kubo and Boltzmann transport equation (BTE) methods of calculating thermal conductivity were used. The effect on thermal conductivity of two different grain boundary systems are then compared and finally extended to MgO nanostructures, thus identifying the role of surfaces and complex nanostructure architectures on thermal conductivity. In Chapter 5 two different materials with the formula unit SiO2 are considered. The two materials are quartz and silicalite which show interesting negative thermal expansion behaviour which may impact upon the thermal transport within the material. Chapter 6 presents results on the promising thermoelectric material STO. Once again the results from both Green-Kubo and BTE calculations are compared. Grain boundaries are also studied and the effect of inter-boundary distance and boundary type on the thermal conductivity is explored. Finally, a nanostructured STO system (assembled nanocubes) with promising thermoelectric applications is studied. Chapter 7 outlines the conclusions made from this work and suggests areas for future study.

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Curran, J. A. "Thermal and mechanical properties of plasma electrolytic oxide coatings." Thesis, University of Cambridge, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.598226.

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A critical review of the current knowledge of PEO coating characteristics and properties is made, and several areas requiring more accurate or more detailed investigations are identified. A leading commercial product – the Keronite^TM coating for aluminium alloys – is the used as a basis for the investigation of the microstructure and properties of PEO coatings. Coating structure and morphology are studied quantitatively to investigate their growth mechanism. Composition is accurately determined for the first time, allowing predictions of physical, mechanical and thermal properties to be made. Particular attention is also paid to the presence of amorphous material and fine-scale porosity – properties which had previously been neglected. The latter is critical to the understanding of coating formation and the capacity for coating impregnation, and is measured and characterised using numerous porosimetry techniques. Mechanical properties of the coatings are characterised using indentation and macroscopic techniques such as beam bending. Correlations are established between the observed structure and measured physical properties such as hardness, local modulus and global stiffness. It is found that wear resistance can also be explained on the basis of the measured mechanical properties and structure. The discovery of low coating stiffness means that high-temperature applications, which had previously been dismissed on the basis of thermal expansion mismatch between the coating and substrate, may indeed be possible. The thermal stability of the coatings is therefore investigated and their stability up to 800°C is demonstrated. Residual stresses are measured and explained in terms of the postulated coating growth mechanism.

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Книги з теми "Thermal oxide"

A, Semenov G., and Beynon J. H, eds. Mass spectrometric study of the vaporization of oxide systems. Chichester: Wiley, 1994.

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Rule, D. L. Thermal conductivity of a polymide film between 4.2 and 300 K, with and without alumina particles as filler. Boulder, Colo: U.S. Dept. of Commerce, National Institute of Standards and Technology, 1990.

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Schütze, Michael. Corrosion behaviour of oxide layers under thermal, chemical, and mechanical stresses. Chichester: Wiley, 1997.

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Wu, Suxing. Sintering additives for zirconia ceramics. Carnforth, Lancashire, England: Parthenon Press, 1986.

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P, Bennett James. High-temperature properties of magnesia-refractory brick treated with oxide and salt solutions. [Avondale, Md.]: U.S. Dept. of the Interior, Bureau of Mines, 1985.

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Cheng, Yi-Kan. Electrothermal analysis of VLSI systems. New York: Kluwer Academic Publishers, 2002.

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Gubner, Andreas. Modelling of high temperature fuel cells: The thermal, chemical, electrochemical and fluidmechanical behaviour of solid oxide fuel cells operating with internal reforming of methane : a thesis. Portsmouth: University of Portsmouth, 1996.

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THORP: The Whitehall nightmare. Oxford: J. Carpenter Pub., 1993.

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Reznit͡skiĭ, L. A. Khimicheskai͡a svi͡azʹ i prevrashchenii͡a oksidov. Moskva: Izd-vo Moskovskogo universiteta, 1991.

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McGarvey, G. B. Interactions between iron oxides and copper oxides under hydrothermal conditions. Pinewa, Man: Research Chemistry Branch, Whiteshell Laboratories, 1995.

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Частини книг з теми "Thermal oxide"

Liu, Zeyu, and Tengfei Luo. "Thermal Properties." In Gallium Oxide, 535–47. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-37153-1_29.

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Malič, Barbara, Alja Kupec, and Marija Kosec†. "Thermal Analysis." In Chemical Solution Deposition of Functional Oxide Thin Films, 163–79. Vienna: Springer Vienna, 2013. http://dx.doi.org/10.1007/978-3-211-99311-8_7.

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Gupta, Mohit. "Modelling of Oxide Growth in TBCs." In Design of Thermal Barrier Coatings, 73–80. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-17254-5_7.

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Kostopoulos, V., and D. E. Vlachos. "Long Term Behaviour of Continuous Fiber Oxide/Oxide Composites Under Thermal Exposure." In Recent Advances in Composite Materials, 215–26. Dordrecht: Springer Netherlands, 2003. http://dx.doi.org/10.1007/978-94-017-2852-2_18.

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Gourine, A. V. "Does Central Nitric Oxide Play a Role in Thermoregulation?" In Thermal Balance in Health and Disease, 491–95. Basel: Birkhäuser Basel, 1994. http://dx.doi.org/10.1007/978-3-0348-7429-8_70.

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Colpan, Can Ozgur, Ibrahim Dincer, and Feridun Hamdullahpur. "Probability of Failure During the Operation of Direct Internal Reforming Solid Oxide Fuel Cells." In Encyclopedia of Thermal Stresses, 4024–37. Dordrecht: Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-007-2739-7_77.

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Pionteck, J., and M. Pyda. "Equilibrium Thermal Properties of Aliphatic Poly(oxide)s." In Part 2: Thermodynamic Properties – pVT-Data and Thermal Properties, 343–62. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-41542-5_56.

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Gerstberger, R., H. Hjelmqvist, and R. Keil. "Nitric Oxide Modulates Thermoregulatory Effector Mechanisms in the Conscious Rabbit." In Thermal Balance in Health and Disease, 485–90. Basel: Birkhäuser Basel, 1994. http://dx.doi.org/10.1007/978-3-0348-7429-8_69.

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Liška, Marek, and Mária Chromčíková. "Thermal Properties and Related Structural Study of Oxide Glasses." In Hot Topics in Thermal Analysis and Calorimetry, 179–97. Dordrecht: Springer Netherlands, 2010. http://dx.doi.org/10.1007/978-90-481-2882-2_11.

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Šesták, Jaroslav, Marek Liška, and Pavel Hubík. "Oxide Glass Structure, Non-bridging Oxygen and Feasible Magnetic Properties due to the Addition of Fe/Mn Oxides." In Hot Topics in Thermal Analysis and Calorimetry, 199–216. Dordrecht: Springer Netherlands, 2010. http://dx.doi.org/10.1007/978-90-481-2882-2_12.

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Тези доповідей конференцій з теми "Thermal oxide"

Mourey, Devin A., Dalong A. Zhao, Ho Him R. Fok, Yuanyuan V. Li, and Thomas N. Jackson. "Thermal effects in oxide TfTs." In 2010 68th Annual Device Research Conference (DRC). IEEE, 2010. http://dx.doi.org/10.1109/drc.2010.5551976.

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Resnick, Alex, Katherine Mitchell, Jungkyu Park, Hannah Maier, Eduardo B. Farfán, Tien Yee, and Christian Velasquez. "Thermal Transport in Defective Actinide Oxides." In ASME 2018 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/imece2018-87605.

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The present study employs a molecular dynamics simulation to explore thermal transport in various oxide nuclear fuels with defects such as uranium oxide and plutonium oxide. In particular, the effect of vacancy and substitutional defects on the thermal transport in actinide oxides are investigated. It is found that the thermal conductivities of these oxide nuclear fuels are significantly reduced by the presence of vacancy defects. In spite of their small size, oxygen vacancy is shown to alter the thermal conductivity of oxide fuels greatly; 0.1% oxygen vacancy reduces the thermal conductivity of plutonium dioxide by more than 10% when the number of unit cell in length is 100. It was shown that the missing of larger atoms alters the thermal conductivity of actinide oxides more significantly. For the case of uranium dioxide, 0.1% uranium vacancies decrease the thermal conductivity by 24.6% while the same concentration of oxygen vacancies decreases the thermal conductivity of uranium dioxide by 19.4%. However, the uranium substitutional defects are shown to have a minimal effect on the thermal conductivity of plutonium dioxide because of the small change in the atomic mass.

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Mitchell, Katherine, Hunter Horner, Alex Resnick, Jungkyu Park, Eduardo B. Farfán, Tien Yee, and Andrew Hummel. "Thermal Transport in Actinide Oxide Fuels With Interstitial Defects." In ASME 2019 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/imece2019-11027.

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Abstract Molecular displacement occurs in the oxide fuels of nuclear reactors during operation. This causes several types of point defects to be generated inside the oxide nuclear fuels. To improve the safety and efficiency of nuclear reactor operation, it is necessary to better understand the effects of point defects on the properties of the oxide fuels. In this study, we examine the effects of interstitial defects on thermal transport in two representative actinide oxides used in modern reactors (UO2, and PuO2). Reverse non-equilibrium molecular dynamics (RNEMD) is employed to approximate the thermal conductivities for the aforementioned fuels at several sample lengths and at defect concentrations of 0.1%, 1%, and 5%. The results show that alterations to the lattice structures of these fuels reduce their thermal conductivities significantly. For example, oxygen interstitial defects at concentrations even as low as 0.1% decreased thermal conductivity by 20% at 100 units for each fuel.

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Patel, Shivani, Saurabh Kansara, Yong X. Gan, Priscilla (Yitong) Zhao, and Jeremy B. Gan. "HYDROTHERMALLY COATED OXIDE NANOPARTICLE-CONTAINING COMPOSITE FIBERS." In 4th Thermal and Fluids Engineering Conference. Connecticut: Begellhouse, 2019. http://dx.doi.org/10.1615/tfec2019.mnt.028031.

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De Bruyker, Dirk, Michael I. Recht, Frank E. Torres, Alan G. Bell, and Richard H. Bruce. "Vanadium oxide thermal microprobes for nanocalorimetry." In 2010 Ninth IEEE Sensors Conference (SENSORS 2010). IEEE, 2010. http://dx.doi.org/10.1109/icsens.2010.5690948.

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Tsunoda, K., Y. Matsukura, R. Suzuki, and M. Aoki. "Thermal instability of GaSb surface oxide." In SPIE Defense + Security, edited by Bjørn F. Andresen, Gabor F. Fulop, Charles M. Hanson, John L. Miller, and Paul R. Norton. SPIE, 2016. http://dx.doi.org/10.1117/12.2223583.

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Santia, Marco D., Stefan C. Badescu, and David C. Look. "Electronic, thermal, and structural properties of zinc gallate from first-principles calculations." In Oxide-based Materials and Devices XII, edited by Ferechteh H. Teherani, David C. Look, and David J. Rogers. SPIE, 2021. http://dx.doi.org/10.1117/12.2586359.

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Vafaei, Saeid, Kazuhiro Manseki, Shusei Sugimoto, and Takashi Sugiura. "OPTIMIZING TITANIUM OXIDE NANOFLUID FOR DYE-SENSITIZED SOLAR CELLS." In Second Thermal and Fluids Engineering Conference. Connecticut: Begellhouse, 2017. http://dx.doi.org/10.1615/tfec2017.mnt.017986.

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Blumenschein, Nicholas, Michael Slomski, Felix Kaess, Mathew H. Breckenridge, Plamen Paskov, John Muth, and Tania Paskova. "Thermal conductivity of bulk and thin film [beta]-Ga2O3 measured by the 3[omega] technique." In Oxide-based Materials and Devices IX, edited by Ferechteh H. Teherani, David C. Look, and David J. Rogers. SPIE, 2018. http://dx.doi.org/10.1117/12.2288267.

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Zhao, G., and D. G. Deppe. "Thermal performance of oxide-free lithographic VCSELs." In 2011 IEEE Photonics Conference (IPC). IEEE, 2011. http://dx.doi.org/10.1109/pho.2011.6110857.

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Звіти організацій з теми "Thermal oxide"

Alvin Solomon, Shripad Revankar, and J. Kevin McCoy. Enhanced Thermal Conductivity Oxide Fuels. Office of Scientific and Technical Information (OSTI), January 2006. http://dx.doi.org/10.2172/862369.

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Ying, Jackie Y., and Justin T. McCue. Processing and Deposition of Nanocrystalline Oxide Composites for Thermal Barrier Coatings. Fort Belvoir, VA: Defense Technical Information Center, June 2000. http://dx.doi.org/10.21236/ada379974.

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Ying, Jackie Y. Processing and Deposition of Nanocrystalline Oxide Composites for Thermal Barrier Coatings. Fort Belvoir, VA: Defense Technical Information Center, September 2000. http://dx.doi.org/10.21236/ada383370.

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Andersson, Anders D., Blas P. Uberuaga, Shiyu Du, Xiang-Yang Liu, Pankaj Nerikar, Christopher R. Stanek, Michael Tonks, Paul Millet, and Bulent Biner. Atomistic Simulations of Mass and Thermal Transport in Oxide Nuclear Fuels. Office of Scientific and Technical Information (OSTI), June 2012. http://dx.doi.org/10.2172/1043009.

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Swisher, J., W. Cho, and W. Qiu. Thermal healing of defects in oxide scales on iron-chromium alloys. Office of Scientific and Technical Information (OSTI), April 1990. http://dx.doi.org/10.2172/7126820.

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Mannion, J. M., R. M. Achey, J. H. Hewitt, C. R. Shick, Jr., and M. J. Siegfried. Reduced graphene oxide as a filament material for thermal ionization mass spectrometry. Office of Scientific and Technical Information (OSTI), September 2018. http://dx.doi.org/10.2172/1475282.

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Thomas, J. R. Jr, W. P. Unruh, and G. J. Vogt. Mathematical model of thermal spikes in microwave heating of ceramic oxide fibers. Office of Scientific and Technical Information (OSTI), April 1994. http://dx.doi.org/10.2172/10139137.

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Singh, Prabhakar. Advanced Anode for Internal Reforming and Thermal Management in Solid Oxide Fuel Cells. Office of Scientific and Technical Information (OSTI), November 2020. http://dx.doi.org/10.2172/1722895.

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