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Analysis of coolant options for advanced metal cooled nuclear reactorsCan, Levent 12 1900 (has links)
lack of consensus among the world researchers on the significance of Po-210 build up in lead cooled reactors. The second objective is to evaluate the advantages and disadvantages of selected candidate metal coolants. In addressing both objectives, the computer code ORIGEN was used. To establish the background basis for these assessments, fundamental concepts of reactor physics are reviewed and discussed.
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Evidence of amorphous/liquid phase separation in Pd₄₁.₂₅Ni₄₁.₂₅P₁₇.₅ alloy. / 非晶液態鈀-鎳-磷合金相位分離的證據 / Evidence of amorphous/liquid phase separation in Pd₄₁.₂₅Ni₄₁.₂₅P₁₇.₅ alloy. / Fei jing ye tai ba-nie-lin he jin xiang wei fen li de zheng juJanuary 2011 (has links)
Yin, Weixin = 非晶液態鈀-鎳-磷合金相位分離的證據 / 殷瑋欣. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2011. / Includes bibliographical references. / Abstracts in English and Chinese. / Yin, Weixin = Fei jing ye tai ba-nie-lin he jin xiang wei fen li de zheng ju / Yin Weixin. / Acknowledgement --- p.i / Abstract --- p.ii / Contents --- p.iv / Chapter Chapter 1 --- Introduction --- p.1 / Chapter 1.1 --- A Brief Introduction to Metallic Glass --- p.1 / Chapter 1.2 --- Homogeneous Nucleation Frequency --- p.3 / Chapter 1.3 --- Heterogeneous Nucleation Frequency --- p.4 / Chapter 1.4 --- Spinodal Decomposition --- p.5 / Chapter 1.5 --- Conditions for Metallic Glasses Formation --- p.8 / Chapter 1.6 --- How to Get Large Undercooling --- p.9 / Chapter 1.7 --- Liquid Phase Separation --- p.10 / References --- p.12 / Figures --- p.13 / Chapter Chapter 2 --- Experimental Procedures and Techniques of Transmission Electron Microscopy --- p.18 / Chapter 2.1 --- Sample preparation --- p.18 / Chapter 2.1.1 --- Ni2P Preparation --- p.18 / Chapter 2.1.2 --- Alloying --- p.18 / Chapter 2.1.3 --- Fluxing --- p.18 / Chapter 2.2 --- Introduction to TEM Specimen Preparation --- p.19 / Chapter 2.2.1 --- "Grinding, Polishing and Punching" --- p.19 / Chapter 2.2.2 --- Final Thinning by Ion Miller --- p.20 / Chapter 2.2.3 --- Final Thinning by Twin Jet --- p.20 / Chapter 2.3 --- Introduction to Transmission Electron Microscopy Techniques --- p.21 / Chapter 2.3.1 --- Basic Instrumentations of TEM --- p.21 / Chapter 2.3.2 --- Elastic Scattering and Inelastic Scattering --- p.21 / Chapter 2.3.3 --- Image Contrast --- p.22 / Chapter 2.3.4 --- Dark Field Image and Bright Field Image --- p.24 / Chapter 2.3.5 --- EDX Mapping --- p.24 / Chapter 2.3.6 --- High Resolution Images --- p.25 / References --- p.26 / Figures --- p.27 / Chapter Chapter 3 --- Evidence of amorphous/liquid phase separation in Pd41.25Ni41.25P17.5 alloy --- p.32 / Chapter 3.1 --- Introduction --- p.32 / Chapter 3.2 --- Experimental --- p.34 / Chapter 3.3 --- Discussions --- p.42 / References --- p.44 / Figures --- p.45 / Chapter Chapter 4 --- Conclusions --- p.68
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Liquid phase separation in molten Pd-Ni-P alloy =: 熔融鈀-鎳-磷合金的液態相分離. / 熔融鈀-鎳-磷合金的液態相分離 / Liquid phase separation in molten Pd-Ni-P alloy =: Rong rong ba, nie, lin he jin de ye tai xiang fen li. / Rong rong ba, nie, lin he jin de ye tai xiang fen liJanuary 1996 (has links)
by Yuen Cheong Wing. / Thesis (M.Phil.)--Chinese University of Hong Kong, 1996. / Includes bibliographical references (leaves [138]-[142]). / by Yuen Cheong Wing. / Acknowledgments --- p.ii / Abstract --- p.iii / Table of Contents --- p.v / Chapter Chapter 1: --- Introduction --- p.1-1 / Chapter 1.1 --- What is Metallic Glass? --- p.1-1 / Chapter 1.2 --- Use of Metallic Glass --- p.1-3 / Chapter 1.3 --- A Dilemma --- p.1-4 / Chapter 1.4 --- Glass Forming Ability --- p.1-5 / Chapter 1.5 --- Role of Liquid State Phase Separation in GFA --- p.1-6 / References --- p.1-9 / Figure --- p.1-10 / Chapter Chapter 2: --- Phase Separation Theory --- p.2-1 / Chapter 2.1 --- Free Energy Curve --- p.2-1 / Chapter 2.2 --- Nucleation and Growth --- p.2-2 / Chapter 2.2.1 --- Liquid state nucleation and growth --- p.2-2 / Chapter 2.2.2 --- Nucleation and growth during solidification --- p.2-4 / Chapter 2.3 --- Spinodal Decomposition --- p.2-5 / Chapter 2.3.1 --- Cahn-Hilliard linearized equation --- p.2-6 / Chapter 2.3.2 --- Temporal evolution --- p.2-9 / References --- p.2-12 / Figures --- p.2-15 / Chapter Chapter 3 : --- Experimental Setup and Techniques --- p.3-1 / Chapter 3.1 --- Technique in Achieving High Undercooling --- p.3 -1 / Chapter 3.1.1 --- Effects and limitation of B203 --- p.3-1 / Chapter 3.1.2 --- Preparation of B203 --- p.3-3 / Chapter 3.1.3 --- Cleansing of apparatus --- p.3-4 / Chapter 3.2 --- Experimental --- p.3-5 / Chapter 3.2.1 --- Sample preparation --- p.3-6 / Chapter 3.2.2 --- Experimental setup --- p.3-7 / Chapter 3.2.3 --- Procedures --- p.3-8 / Chapter 3.3 --- Observing the Microstructure --- p.3-9 / Chapter 3.3.1 --- Cutting --- p.3-10 / Chapter 3.3.2 --- Molding --- p.3-10 / Chapter 3.3.3 --- Polishing --- p.3-11 / Chapter 3.3.4 --- Etching --- p.3-12 / Chapter 3.3.5 --- Observation --- p.3-12 / References --- p.3-14 / Table --- p.3-15 / Figures --- p.3-16 / Chapter Chapter 4: --- Metastable liquid phase separationin undercooled molten PD40. 5]\l40.5P19 --- p.4-1 / Abstract --- p.4-1 / References --- p.4-9 / Figures --- p.4-10 / Chapter Chapter 5 : --- Transformation in undercooled molten PD40.5NI40.5P19 --- p.5-1 / Chapter 5.1 --- Abstract --- p.5-1 / Chapter 5.1 --- Introduction --- p.5-2 / Chapter 5.3 --- Experimental --- p.5-4 / Chapter 5.4 --- Results --- p.5-6 / Chapter 5.5 --- Discussions --- p.5-13 / References --- p.5-20 / Figures --- p.5-22 / Chapter Chapter 6 : --- Solidification of liquid spinodal in undercooled PD40.5NI40.5P19 --- p.6-1 / Chapter 6.1 --- Abstract --- p.6-1 / Chapter 6.2 --- Introduction --- p.6-2 / Chapter 6.3 --- Experimental --- p.6-3 / Chapter 6.4 --- Results --- p.6-5 / Chapter 6.5 --- Discussions --- p.6-10 / References --- p.6-17 / Figures --- p.6-18 / Chapter Chapter 7: --- Conclusion --- p.7-1 / References --- p.7-4 / Bibliography --- p.B-1
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Axisymmetric modes in hydromagnetic waveguide.January 1967 (has links)
Based on a Sc.D. thesis in the Dept. of Electrical Engineering, 1965. / Bibliography: p.98-99.
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International Workshop on Measuring Techniques for Liquid Metal Flows (MTLM), Rossendorf, 11.-13.10.99, ProceedingsGerbeth, Gunter, Eckert, Sven 31 March 2010 (has links) (PDF)
The International Workshop on "Measuring Techniques in Liquid Metal Flows" (MTLM Workshop) was organised in frame of the Dresden "Innovationskolleg Magnetofluiddynamik". The subject of the MTLM Workshop was limited to methods to determine physical flow quantities such as velocity, pressure, void fraction, inclusion properties, crystallisation fronts etc. The present proceedings contain abstracts and viewgraphs of the oral presentations. During the last decades numerical simulations have become an important tool in industry and research to study the structure of flows and the properties of heat and mass transfer. However, in case of liquid metal flows there exists a significant problem to validate the codes with experimental data due to the lack of available measuring techniques. Due to the material properties (opaque, hot, chemical aggressive) the measurement of flow quantities is much more delicate in liquid metals compared to ordinary water flows. The generalisation of results obtained by means of water models to real liquid metal flows has often to be considered as difficult due to the problems to meet the actual values of non-dimensional flow parameters (Re, Pr, Gr, Ha, etc.). Moreover, a strong need has to be noted to make measuring techniques available to monitor and to control flow processes in real industrial facilities.
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Kinetics of corrosion and dross build-up in molten Zn-Al systemsXu, Jing, January 2007 (has links)
Thesis (Ph. D.)--West Virginia University, 2007. / Title from document title page. Document formatted into pages; contains x, 235 p. : ill. (some col.). Includes abstract. Includes bibliographical references.
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Semi-solid slurry formation via liquid metal mixingFindon, Matthew M. January 2003 (has links)
Thesis (M.S.)--Worcester Polytechnic Institute. / Keywords: thixocasting; SSM; semi-solid processing; liquid metal mixing; rheocasting. Includes bibliographical references (p. 88-90).
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International Workshop on Measuring Techniques for Liquid Metal Flows (MTLM), Rossendorf, 11.-13.10.99, Proceedings: International Workshop on Measuring Techniques for Liquid Metal Flows (MTLM), Rossendorf, 11.-13.10.99, ProceedingsGerbeth, Gunter, Eckert, Sven January 1999 (has links)
The International Workshop on "Measuring Techniques in Liquid Metal Flows" (MTLM Workshop) was organised in frame of the Dresden "Innovationskolleg Magnetofluiddynamik". The subject of the MTLM Workshop was limited to methods to determine physical flow quantities such as velocity, pressure, void fraction, inclusion properties, crystallisation fronts etc. The present proceedings contain abstracts and viewgraphs of the oral presentations. During the last decades numerical simulations have become an important tool in industry and research to study the structure of flows and the properties of heat and mass transfer. However, in case of liquid metal flows there exists a significant problem to validate the codes with experimental data due to the lack of available measuring techniques. Due to the material properties (opaque, hot, chemical aggressive) the measurement of flow quantities is much more delicate in liquid metals compared to ordinary water flows. The generalisation of results obtained by means of water models to real liquid metal flows has often to be considered as difficult due to the problems to meet the actual values of non-dimensional flow parameters (Re, Pr, Gr, Ha, etc.). Moreover, a strong need has to be noted to make measuring techniques available to monitor and to control flow processes in real industrial facilities.
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Flow of a thin ribbon of molten glass on a bath of molten tinSangweni, Zinhle Brighty January 2016 (has links)
A Dissertation submitted to the Faculty of Science, University of the Witwatersrand, Johannesburg, for the degree of Master of Science. School of Computer Science and Applied Mathematics. November 7, 2016. / The equations for the
flow of a thin lm of molten glass on a bath of molten
tin are extended to the case in which the viscosity of the molten glass depends
on the temperature. The continuity equation for an incompressible
fluid, the
Navier-Stokes equation and the energy balance equation are written in the
lubrication (thin
fluid lm) approximation. The kinematic boundary condition and the boundary conditions for the normal and tangential stress and
the normal heat
flux are derived on the upper and lower surfaces of the glass
ribbon. It is found for the lubrication approximation that only one equation is
obtained for four unknowns which are the two horizontal velocity components,
the absolute temperature difference and the thickness of the molten glass rib-
bon. The remaining three equations are obtained by taking the calculation
to the next order in the square of the ratio of the thickness to length of the
glass ribbon. The kinematic edge condition and the edge conditions for the
normal and tangential stress and the normal heat
flux are derived. The four
edge conditions and the boundary conditions at the inlet and outlet give the
boundary conditions for the four partial differential equations. It is not the
aim of the dissertation to solve the boundary value problem which has been
derived, either numerically or analytically. / LG2017
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Characterizing the Movement of Contaminant Liquid Metal Particles when subject to Electric Pulses, within the Context of Z-pinch Fusion ReactorsSridhar, Vignesh 18 December 2024 (has links)
This thesis examines the behavior of contaminant liquid metal particles, known as ejecta, which are expelled from magnetically-accelerated liquid metal surfaces, in Z-pinch fusion reactors. These ejecta present significant contamination risks to plasma fuel in fusion reactors. The study employed a liquid electrode setup, exposing a eutectic tin-bismuth mixture to high-current pulses. Particle motion was tracked and analyzed using high-speed camera footage processed with advanced techniques, including contrast limited adaptive histogram equalization (CLAHE), neutral-density filtering, and Sobel edge detection. The research integrates automated particle tracking algorithms with connected-component labeling and two-point correlation functions to monitor ejecta trajectories. Results reveal an average ejected particle velocity of 2.54 m/s (±3.58 m/s), with particle formation likelihood peaking at velocities around 1.14 m/s. These findings indicate that particle ejection dynamics are influenced by factors such as initial temperature, vacuum conditions, and electrostatic forces. This research provides crucial insights for optimizing reactor design and mitigating contamination in future fusion energy applications. The study also proposes directions for further investigation, including the temperature dependency of particle ejection dynamics and the implementation of improved heating systems for experimental setups. / Master of Science / This thesis explores how tiny particles of liquid metal, called ejecta, behave when exposed to powerful electric pulses in a type of nuclear fusion reactor known as a Z-pinch reactor. These particles, which are thrown out from the surface of liquid metal during fusion experiments, can contaminate the fuel and reduce the efficiency of the fusion reactor. The study involves a series of experiments where a special mixture of metals, tin and bismuth, is subjected to high electrical currents. Using advanced image processing techniques, such as digital enhancement and edge detection, the movement of these particles was tracked with high-speed cameras. The findings reveal that the average speed of these particles is about 2.54 meters per second, and their formation is most likely at speeds around 1.14 meters per second. The results suggest that factors like temperature, vacuum conditions, and electromagnetic forces significantly affect how these particles are ejected. Understanding this behavior is important for improving the design and performance of future fusion reactors, which aim to provide a clean and almost limitless source of energy. The study also points to further research opportunities, including examining how different temperatures affect the behavior of these particles and enhancing the experimental setup to better control heating conditions.
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