Дисертації з теми "Liquid Metal Alloys"
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Clegg, Richard Edward. "Liquid-metal embrittlement of metals and alloys." Thesis, University of Cambridge, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.260608.
Повний текст джерелаBarriga, Salvador A. (Salvador Aguilar). "An electrochemical investigation of the chemical diffusivity in liquid metal alloys." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/81058.
Повний текст джерелаCataloged from PDF version of thesis.
Includes bibliographical references (p. 229-239).
The liquid metal battery has been shown to be a viable candidate for grid-scale energy storage, due to its fast kinetics and ability to be constructed from economically feasible materials. Various of the liquid metal couples that form high stable voltages, such as the calcium chemistries, are rate limited because they tend to form solid intermetallic compounds with high melting points. In order to understand and better engineer these batteries, the kinetic properties of these liquid alloys, in particular the chemical diffusivity, must be known accurately so that it can be used as input in computational simulations to avoid the nucleation of any solids. Unfortunately, the dominant experimental methods for measuring diffusion in liquid metals today are unreliable because the measurement timescales are on the order of days, require long capillaries susceptible to buoyancy-driven flow from temperature fluctuations, and composition analysis must be done ex-situ as a solid. To counter all these problems, a new and novel method for measuring the chemical diffusivity of metals in liquid alloys derived from electrochemical principles is presented in this thesis. This new method has the advantage of operating in shorter times scales of minutes rather than days, and requires the use of small capillaries which collectively minimize the effect of convectively-driven flow caused from temperature gadients. This new method was derived by solving the same boundary conditions required by the galvanostatic intermittent titration technique for solid-state electrodes. To verify the validity of the new theoretical derivation, the method was used to measure the chemical diffusivity of calcium in liquid bismuth within the temperature range of 550 - 700 'C using a three-electrode setup with a ternary molten salt electrolyte. Three compositions where studied (5% Ca-Bi, 10% Ca-Bi, and 15% Ca-Bi) for comparison. The chemical diffusion coefficient was found to range between (6.77 ± 0.21)x10- 5 cm 2/s - (10.9 ± 0.21)x10-5 cm 2/s at 5% Ca-Bi, (4.95 ± 0.65)x10- 5 cm2 /s - (7.93 ± 0.37)x10- 5 cm 2 /s at 10% Ca-Bi, and (6.22 ± 1.2)x10- 5 cm 2/s - (10.2 ± 0.26)x10- 5 cm 2 /s at 15% Ca-Bi which, to our knowledge, are the first successful measurements of calcium diffusivity in the liquid state. Arrhenius fits with good correlations revealed the activation energy for diffusion to be (21.4± 1.7) kJ/mol, (23.0± 2.4) kJ/mol, and (17.7 ±5.9) kJ/mol as the calcium concentration increased, which are in excellent agreement with literature published values and lie in the same range of 15-30 kJ/mol that is reported for most liquid metals. The chemical diffusivity value was then used as input in finite element simulations to model how convection affects the overall transport inside a 20-Ah liquid bismuth electrode under the influence of different thermal boundary conditions. Also, a phase field model was created to simulate the motion of the two interfaces inside a liquid metal battery during operation, which to our knowledge, is the first time phase field has been extended beyond two phases. Experimental kinetic values can then be used as input in these numerical models to help characterize and optimize the entire battery.
by Salvador A. Barriga.
Ph.D.
Silva, M. P. "Oxidation of Aluminium-Magnesium alloys at elevated temperature in the solid, semi-liquid and liquid states." Thesis, Brunel University, 1987. http://bura.brunel.ac.uk/handle/2438/5417.
Повний текст джерелаBozack, Michael J. "Surface phenomena in liquid metal alloys with application to development of a liquid metal ion source of B and As /." Full text open access at:, 1985. http://content.ohsu.edu/u?/etd,76.
Повний текст джерелаKart, Hasan Huseyin. "Molecular Dynamics Study Of Random And Ordered Metals And Metal Alloys." Phd thesis, METU, 2004. http://etd.lib.metu.edu.tr/upload/12605467/index.pdf.
Повний текст джерелаFassler, Andrew L. "Application of Liquid-Metal GaIn Alloys to Soft-matter Capacitance and Related Stretchable Electronics." Research Showcase @ CMU, 2016. http://repository.cmu.edu/dissertations/737.
Повний текст джерелаRhamdhani, Muhammad Akbar Brooks Geoffrey. "Reaction kinetics and dynamic interfacial phenomena in liquid metal-slag systems." *McMaster only, 2005.
Знайти повний текст джерелаHigashino, Shota. "Electrodeposition of reactive metals and alloys from non-aqueous electrolytes and their applications." Kyoto University, 2020. http://hdl.handle.net/2433/259066.
Повний текст джерелаOzdemir, Kart Sevgi. "Physical Properties Of Pd, Ni Metals And Their Binary Alloys." Phd thesis, METU, 2004. http://etd.lib.metu.edu.tr/upload/12604914/index.pdf.
Повний текст джерелаWei, Shuai, Garrett J. Coleman, Pierre Lucas, and C. Austen Angell. "Glass Transitions, Semiconductor-Metal Transitions, and Fragilities in Ge-V-Te (V = As, Sb) Liquid Alloys: The Difference One Element Can Make." AMER PHYSICAL SOC, 2017. http://hdl.handle.net/10150/624356.
Повний текст джерелаAntipas, George. "A study of the spray forming of Al-Li alloys." Thesis, University of Surrey, 1995. http://epubs.surrey.ac.uk/843719/.
Повний текст джерелаCao, Xinjin. "Heat treatment of liquid metal : precipitation and sedimentation processing of liquid Al-11.5Si-0.4Mg alloy." Thesis, University of Birmingham, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.369168.
Повний текст джерелаThews, Jonathan Tyler. "Design and Analysis of L-Band Reconfigurable Liquid-Metal Alloy Antennas." Thesis, Virginia Tech, 2017. http://hdl.handle.net/10919/78007.
Повний текст джерелаMaster of Science
Krishnardula, Venu Gopal. "Transient liquid phase bonding of ferritic oxide dispersion strengthened alloys." Auburn, Ala., 2005. http://repo.lib.auburn.edu/2005%20Fall/Dissertation/KRISHNARDULA_VENU_19.pdf.
Повний текст джерелаForté, Martin. "Modélisation de l'écoulement de l'aluminium semi-solide dans le moulage sous pression /." Thèse, Chicoutimi : Université du Québec à Chicoutimi, 2006. http://theses.uqac.ca.
Повний текст джерелаLa p. de t. porte en outre: Mémoire présenté à l'Université du Québec à Chicoutimi comme exigence partielle de la maîtrise en génie. CaQCU Bibliogr.: f. [142-145]. Document électronique également accessible en format PDF. CaQCU
Cherne, Frank Joseph. "Calculation of transport properties of liquid metals and their alloys via molecular dynamics." Diss., The University of Arizona, 2000. http://hdl.handle.net/10150/284305.
Повний текст джерелаSaha, Deepak. "Novel Processing Methods and Mechanisms to Control the Cast Microstructure in Al Based Alloys - 390 and Wrought Alloys." Link to electronic thesis, 2005. http://www.wpi.edu/Pubs/ETD/Available/etd-041405-150300/.
Повний текст джерелаMalra, Gurjinder Kaur. "X-ray photoelectron spectroscopic studies of certain metals and alloys through the solid/liquid transition." Thesis, Brunel University, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.328949.
Повний текст джерелаPonchet, Anne. "Etude des systèmes de fermions lourds UPt3 et CeRu2Si2 à haute pression : régime liquide de Fermi et phase polarisée sous champ magnétique." Grenoble 1, 1987. http://www.theses.fr/1987GRE10014.
Повний текст джерелаCoruh, Ali. "Molecular-dynamics Investigation Of The Dynamic Properties Of Pd And Al Metals, And Their Alloys." Phd thesis, METU, 2003. http://etd.lib.metu.edu.tr/upload/12604716/index.pdf.
Повний текст джерелаHans, Stéphane. "Modélisation des transferts couplés de chaleur, de soluté et de quantité de mouvement lors de la refusion à l'arc sous vide (VAR) : application aux alliages de titane." Vandoeuvre-les-Nancy, INPL, 1995. http://www.theses.fr/1995INPL023N.
Повний текст джерелаHolford, W. David (William David). "A measurement technique for refractory erosion/corrosion in molten metals /." Thesis, McGill University, 1985. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=63327.
Повний текст джерелаKilian, Rolf. "From cuprates to manganites: spin and orbital liquids." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 1999. http://nbn-resolving.de/urn:nbn:de:swb:14-994411393875-11016.
Повний текст джерелаShi, Hao [Verfasser], and R. [Akademischer Betreuer] Stieglitz. "Alumina forming alloys (steels, high entropy materials) for the mitigation of compatibility issues with liquid metals and steam in energy related, high-temperature applications / Hao Shi ; Betreuer: R. Stieglitz." Karlsruhe : KIT-Bibliothek, 2020. http://d-nb.info/1205807675/34.
Повний текст джерелаChristopher, Petersson. "Erosion-Corrosion experiments on Steels in liquid lead and Development of Slow Strain Rate testing rig." Thesis, KTH, Kärnenergiteknik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-261611.
Повний текст джерелаCHERRE, JEAN-PIERRE. "Contribution a l'etude de la production de poudres metalliques par atomisation centrifuge de metal ou alliage liquides." Clermont-Ferrand 2, 1989. http://www.theses.fr/1989CLF2D217.
Повний текст джерелаLorrain, Vincent. "Influence des proprietes capillaires sur la corrosion du tungstene par des metaux liquides." Grenoble INPG, 1996. http://www.theses.fr/1996INPG0099.
Повний текст джерелаChen, Shu. "FePt magnetic nanoparticles : syntheses, functionalisation and characterisation for biomedical applications." Thesis, University of St Andrews, 2011. http://hdl.handle.net/10023/2151.
Повний текст джерелаSpinelli, Jose Eduardo. "Influencia da convecção no liquido nas variaveis termicas e estruturais na solidificação descendente de ligas Sn-Pb." [s.n.], 2005. http://repositorio.unicamp.br/jspui/handle/REPOSIP/265085.
Повний текст джерелаTese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecanica
Made available in DSpace on 2018-08-04T03:13:50Z (GMT). No. of bitstreams: 1 Spinelli_JoseEduardo_D.pdf: 12716637 bytes, checksum: 79131dc23b1f9de6e4d77299eeff6973 (MD5) Previous issue date: 2005
Resumo: Poucos estudos têm analisado os efeitos da convecção no líquido interdendrítico, bem como a influência da direção de crescimento em relação à gravidade nas variáveis térmicas e estruturais durante a solidificação. Neste trabalho, foi utilizado um dispositivo de solidificação unidirecional vertical descendente, constituído por uma lingoteira de aço inoxidável com diâmetro interno de 60 mm, 157 mm de comprimento e 9 mm de espessura. Na parte superior, foi posicionada uma câmara de refrigeração a água do mesmo material do molde e com espessura útil de 3,0 mm. Após a obtenção dos lingotes e registrados os respectivos perfis térmicos experimentais, foram determinadas as variáveis térmicas de solidificação: coeficiente de transferência de calor metal/molde, velocidades de deslocamento da isoterma liquidus, gradientes térmicos e taxas de resfriamento para a solidificação unidirecional descendente de ligas hipoeutéticas do sistema Sn-Pb (Sn5%Pb, Sn15%Pb e Sn20%Pb). Estas variáveis térmicas são confrontadas com as previsões teóricas de um modelo numérico de solidificação e, em seguida, correlacionadas com os parâmetros estruturais: espaçamentos dendríticos primários, secundários e transição colunar/equiaxial (TCE). Dessa forma, são determinadas equações experimentais de crescimento para a solidificação descendente e verificado um critério de previsão da TCE. Realiza-se também uma análise comparativa dos presentes resultados com aqueles obtidos para solidificação vertical ascendente de ligas de mesma composição. Os resultados comparativos mostram que o efeito convectivo estimula a ocorrência da TCE e ainda é responsável por uma sensível redução dos espaçamentos dendríticos primários. As previsões teóricas de modelos de crescimento dendrítico representativos da literatura são confrontadas com os resultados experimentais
Abstract: Only a few studies have reported influences of interdendritic convection and growth direction on dendrite arm spacings. A downward directional solidification apparatus was used having a stainless steel split mold with an internal diameter of 60 mm, height 157 mm and a 9 mm wall thickness. The upper part of the split mold was closed with a water-cooling chamber made of stainless steel, with a wall thiclmess of 3 mm. A combined theoretical and experimental approach is developed to quantitatively determine the solidification thermal parameters: transient heat transfer coefficients, tip growth rates, thermal gradients and cooling rates during downward unsteady state solidification ofhypoeutectic Sn-Pb alloys. The resulting thermosolutal convection can start in the melt both within the interdendritic region and ahead of the dendrite array. The experimental results have shown that melt convection may be causing pileup of fractioned dendritic arms, which must stimulate the CET occurrence. The results have supported a criterion recently proposed based on a critical tip cooling rate. For upward unidirectional condition this critical value was found to be about 0.014 K/s for hypoeutectic Sn-Pb alloys. In the present study, in conditions of downward solidification, melt convection seems to favor the structural transition, which is anticipated and occurs for a critical cooling rate of about 0.03 K/s, for any of three hypoeutectic alloys experimentally examined. Primary dendritic arm spacings have been affected by the direction of growth, decreasing in conditions of downward vertical solidification when compared with those grown vertically upwards. The main predictive theoretical models for dendritic spacings are compared with the experimental observations
Doutorado
Materiais e Processos de Fabricação
Doutor em Engenharia Mecânica
NASCIMENTO, JAMIL A. do. "Avaliacao neutronica de reator carregado com combustivel metalico e refrigerado por chumbo." reponame:Repositório Institucional do IPEN, 2000. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10789.
Повний текст джерелаMade available in DSpace on 2014-10-09T14:07:25Z (GMT). No. of bitstreams: 1 06864.pdf: 11106654 bytes, checksum: 851c7803db872d59fc1f49dc465fa8af (MD5)
Tese (Doutoramento)
IPEN/T
Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP
Schwartz, Frédéric. "Etude des parametres d'elaboration de rubans amorphes par la methode du flot planaire : influence d'elements de substitution sur les proprietes d'un alliage amorphe fe::(79)b::(16)si::(5)." Paris 6, 1986. http://www.theses.fr/1986PA066574.
Повний текст джерелаMeyer, Nadège. "Simulation numérique de la viscosité de liquides : effets des paramètres d'interaction, de la température et de la pression sous conditions ambiantes et extrêmes." Thesis, Université de Lorraine, 2017. http://www.theses.fr/2017LORR0293/document.
Повний текст джерелаThis work is devoted to the study of the shear viscosity by numerical simulation of equilibrium classical molecular dynamics with a particular attention to the influence of high pressures on this property. From trajectories generated by these simulations and using the Grenn-Kubo formula, the viscosity is obtained. A broad range of systems has been studied, covering from pure atomic fluids to a molecular liquid, as well as binary mixtures. First, we focused on alkali metals. The main outcome of this study is that the viscosity of these metals has a universal behavior over a wide range of phase diagram. Furthermore, over this interval, the universal relation that we have proposed permits the prediction of the viscosity value of any elements with an uncertainty lower than 10%. The validity of the Stokes-Einstein relation, connecting the self-diffusion coefficient and the viscosity, has also been verified. Then, a systematic study has been carried out on model mixtures of Lennard-Jones fluids to test the influence of interaction parameters on the viscosity behavior. A theoretical estimation based on the effective one-component fluid model has been proposed. Moreover, the Stokes-Einstein relation has been successfully extended to mixtures. These observations have been compared with two real alloys: K-Cs and Li-Bi. Lastly, a preliminary study on water has been undertaken by modeling the interactions with two models: SPC/E, non-polarizable and BK3, polarizable. The effect of the introduction of the polarizability on the viscosity has been studied. The validity of Stokes-Einstein and Stokes-Einstein-Debye, involving the rotation of the molecule, has been evaluated under very high pressure
Khatim, Othmane. "Contribution à la compréhension et à la maîtrise du procédé d'atomisation de jets métalliques liquides." Phd thesis, Université de Technologie de Belfort-Montbeliard, 2011. http://tel.archives-ouvertes.fr/tel-00703182.
Повний текст джерелаStiehler, Martin. "Strukturelle und elektronische Eigenschaften binärer amorpher Aluminiumlegierungen mit Übergangsmetallen und Metallen der Seltenen Erden." Doctoral thesis, Universitätsbibliothek Chemnitz, 2012. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-83708.
Повний текст джерелаGeldenhuis, Jacobus Marthinus Andreas. "Development of electrochemical sensing techniques for the determination of activity-composition relations in liquid alloys and slags at 1873 K." Thesis, 1991. http://hdl.handle.net/2263/42448.
Повний текст джерелаThesis (PhD)--University of Pretoria, 1991.
gm2014
Materials Science and Metallurgical Engineering
Unrestricted
Lee, Pou-Yung. "Thermophysical property measurements at high temperatures for liquid metal alloys and gadolinium oxide-doped uranium dioxide samples." Thesis, 1993. http://hdl.handle.net/1911/13754.
Повний текст джерела"Evidence of amorphous/liquid phase separation in Pd₄₁.₂₅Ni₄₁.₂₅P₁₇.₅ alloy." 2011. http://library.cuhk.edu.hk/record=b5894648.
Повний текст джерелаThesis (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
Chekmarev, Dmitriy S. "Computer simulation studies of the structures of the liquid-vapor interfaces of metals and binary alloys /." 1999. http://wwwlib.umi.com/dissertations/fullcit/9920138.
Повний текст джерела"Formation of bulk nanocrystalline materials." 1999. http://library.cuhk.edu.hk/record=b6073188.
Повний текст джерелаThesis (Ph.D.)--Chinese University of Hong Kong, 1999.
Includes bibliographical references.
Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web.
Mode of access: World Wide Web.
Abstracts in English and Chinese.
Huang, Hsin-Yi, and 黃馨儀. "Electrodeposition of electrocatalytic FePt, PdNi alloys and Pd metal from ionic liquids for oxygen reduction reaction, ethanol oxidation reaction and glucose oxidation." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/49289596073069781776.
Повний текст джерела高雄醫學大學
醫藥暨應用化學研究所
98
In this thesis, the electrochemical behaviors of Pt(II), Fe(II) and the mixtures of Pt(II) and Fe(II) were investigated using platinum, glassy carbon and tungsten electrodes in N-butyl-N-methylpyrrolidinium dicyanamide ionic liquid (BMP-DCA IL), N-butyl-N-methyl pyrrolidinium bis((trifluoromethyl)sulfonyl)imide ionic liquid (BMP-TFSI IL) and a mixture of BMP-DCA and BMP-TFSI. In BMP-DCA, the Pt(II) species were attained by adding PtCl2 and the Fe(II) species were attained by adding FeCl2 or anodic dissolution of Fe wire. In BMP-TFSI, PtCl2 was not soluble; additional two equivalents of BMP-Cl were introduced to assist PtCl2 to dissolve. The Fe(II) ions were introduced into BMP-TFSI by adding FeCl2 and two equivalents of BMP-Cl or by anodic dissolution of Fe electrode. The nucleation process of electrochemical reduction of Fe(II) was investigated by using chronoamperometry (CA) and the 3D instantaneous nucleation was involved in the electrodeposition of Fe. The effect of temperature on the electrochemical behavior was also studied. Electrodeposition of Pt, Fe and FePt alloys was achived by potentiostatic electrolysis and the effect of the applied potentials were carefully studied. The surface morphology and composition of all the electrodeposition samples were characterized by scanning electron microscope (SEM) and energy dispersive spectrometry (EDS), respectively. The electrocatalytic activity towards oxygen reduction reaction (ORR) was studied at the FePt alloy-coated electrodes with various atomic ratios of Pt/Fe. The experimental results revealed that the FePt alloy with an atomic ratio of Pt/Fe ~ 0.5/0.5 had the best catalytic activity to ORR in 0.1 M HClO4 in terms of the reduction overpotential and current density. The FePt alloy electrode also revealed catalytic activity toward ethanol oxidation reaction (EOR). On the other hand, Pd(II), Ni(II) and the mixtures of Pd(II) and Ni(II) were introduced into BMP-DCA IL by adding PdCl2 and NiCl2, respectively. The voltammetric behavior of Pd(II) and Ni(II) were studied and electrodeposition of Pd, Ni, and PdNi alloys was achieved by potentiostatic electrolysis. The PdNi alloy with an atomic ratio of Pd/Ni ~ 80/20 showed the best catalytic activity and stability toward ethanol oxidation compare with other PdNi alloys with different atomic ratios in 1 M NaOH. By using cyclic voltammetry, the dependence of the anodic peak current of ethanol oxidation on the concentration of ethanol was linear from 4.92 μM to 962 μM (R2 = 0.9975). A linearity was observed from 4.92 μM to 988 μM (R2 = 0.998) by using hydrodynamic amperometry. The Pd-electrodeposited electrode prepared from BMP-DCA IL displayed good catalytic activity to glucose oxidation in 0.1 M NaOH. The calibration curve of glucose showed two linear ranges; one occurred at low concentration range and the other one at high concentration range. Therefore, CV, SWV and i-t curve were employed to study the dependence of glucose oxidation current on concentration of glucose in the two concentration ranges.
"Liquid phase separation in molten Pd-Ni-P alloy =: 熔融鈀-鎳-磷合金的液態相分離". Chinese University of Hong Kong, 1996. http://library.cuhk.edu.hk/record=b5888966.
Повний текст джерелаThesis (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
(11196129), Ruiji Sun. "RHEOLOGICAL CHARACTERIZATION DURING METALLURGICAL SOLID-LIQUID PHASE CHANGES IN RESISTANCE SPOT WELDING AND BINDER JET PRINTING." Thesis, 2021.
Знайти повний текст джерелаThe dissertation offers a Multiphysics perspective in analyzing emerging metallurgical techniques. Heat transfer, structural deformation, and fluid flow associate with one another in phase-changing materials processing methods. To comprehensively analyze these aspects for an optimized final product, the authors have proposed a numerical mathematical model describing the thermal and geometric progression of the binary alloy casting process. The model is further executed in COMSOL Multiphysics, adapted in two metal manufacturing applications, resistance spot welding (RSW) and binder jet printing (BJP).
Resistance spot welding is a well-adapted metal sheeting joining technique with comparably limited modeling and simulating research. The heat transfer module and geometric deformation module are applied to the simulation of RSW to discuss the thermal gradient development of the welding zone. The model was further calculated and verified through a case study with Python.
BJP is a rapidly developing additive manufacturing method. The novel 3D printing technique brings challenges in post-processing geometric control and material selection limitations. Multiphysics simulation serves as an excellent tool in process parameters analysis and quality control. This dissertation focuses on the sintering process of BJP of binary alloy powders. Melting and solidification mathematical models were implemented in COMSOL, where the sintering shrinkage rate could be calculated. The shrinkage rate was further verified through experimental analysis of binder jet printed samples.
Microstructural analysis on sintered binder jet printed parts was performed to assess the validity of BJP to substitute the die casting method for manufacturing of valvebody. Sintering shrinkage and metallurgical analysis have been performed on the green and sintered BJP samples. After sintering, the final part achieved 98% density, and the integrity of the designed channels was preserved. The shrinkage analysis has indicated the effect of printing orientation and sintering orientation on the geometry and metallurgy of the final products. Microstructure analysis on the cross-sections of the sintered products also indicates the various defects induced from biner jet 3D printing.
The research aims to provide a systematic rheology analysis of the phase transformation process of binary alloys. The dissertation has connected the physical, mathematical modeling with 15
simulative modeling through the rheological evaluation of phase-changing manufacturing techniques. The connections were conclusively verified through empirical studies, including case assessment and experimentation. The research aims to offer universally applicable models that can be applied to phase-changing metal processing techniques.
Khodja, Abdellah. "Investigations of transport phenomena and dynamical relaxation in closed quantum systems." Doctoral thesis, 2015. https://repositorium.ub.uni-osnabrueck.de/handle/urn:nbn:de:gbv:700-2015031713128.
Повний текст джерелаStiehler, Martin. "Strukturelle und elektronische Eigenschaften binärer amorpher Aluminiumlegierungen mit Übergangsmetallen und Metallen der Seltenen Erden." Doctoral thesis, 2011. https://monarch.qucosa.de/id/qucosa%3A19668.
Повний текст джерела