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Jenkins, Neil Travis 1973. "Chemistry of airborne particles from metallurgical processing". Thesis, Massachusetts Institute of Technology, 2003. http://hdl.handle.net/1721.1/17033.
Pełny tekst źródłaVita.
Includes bibliographical references.
Airborne particles fall into one of three size ranges. The nucleation range consists of nanoparticles created from vapor atom collisions. The decisive parameter for particle size and composition is the supercooling of the vapor. The accumulation range, which comprises particles less than 2 micrometers, consists of particles formed from the collision of smaller primary particles from the nucleation range. The composition of agglomerates and coalesced particles is the same as the bulk vapor composition. Coarse particles, the composition of which is determined by a liquid precursor, are greater than 1 micrometer and solidify from droplets whose sizes are controlled by surface, viscous, and inertial forces. The relationship between size and composition of airborne particles could be seen in welding fume, a typical metallurgical aerosol. This analysis was performed with a cascade impactor and energy dispersive spectrometry with both scanning electron microscopy (SEM-EDS) and scanning transmission electron microscopy (STEM-EDS). Other methods for properly characterizing particles were discussed. In the analysis, less than 10% of the mass of fume particles for various types of gas metal arc welding (GMAW) were coarse, while one-third of flux cored arc welding (FCAW) fume particles were coarse. Coarse particles had a composition closer to that of the welding electrode than did fine particles. Primary particles were not homogeneous. Particles larger than the mean free path of the carrier gas had the same composition as that of the vapor, but for particles 20 to 60 nanometers, smaller particles were more enriched in volatile metals than larger particles were. This was explained by the cooling path along the bubble point line of a binary phase diagram.
(cont.) Particles were not necessarily homogenous internally. Because nanoparticles homogenize quickly, they may form in a metastable state, but will not remain in that state. In this analysis, the presence of multiple stable immiscible phases explains this internal heterogeneity. The knowledge contained herein is important for industries that depend on the properties of nanoparticles, and for manufacturing, where industrial hygiene is important because of respirable particle by-products, such as high-energy-density metallurgical processing.
by Neil Travis Jenkins.
Ph.D.
King, Matthew Joseph. "Control and optimization of metallurgical sulfuric acid plants". Diss., The University of Arizona, 1999. http://hdl.handle.net/10150/284812.
Pełny tekst źródłaBernardis, Sarah. "Engineering impurity behavior on the micron-scale in metallurgical-grade silicon production". Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/101457.
Pełny tekst źródłaThis electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Cataloged from student-submitted PDF version of thesis.
Includes bibliographical references (pages 127-137).
Impurities are detrimental to silicon-based solar cells. A deeper understanding of their evolution, microscopic distributions, and oxidation states throughout the refining processes may enable the discovery of novel refining techniques. Using synchrotron-based microprobe techniques and bulk chemical analyses, we investigate Fe, Ti, and Ca starting from silicon- and carbon bearing raw feedstock materials to metallurgical grade silicon (MG-Si), via carbothermic reduction. Before reduction, impurities are present in distinct micron- or sub-micron-sized minerals, frequently located at structural defects in Si-bearing compounds. Chemical states vary, they are generally oxidized (e.g., Fe²+, Fe³+). Impurity concentrations are directly correlated to the geological type of quartz: pegmatitic and hydrothermal quartz have fewer impurities than quartzite. Particles containing Cr, Mn, Fe, Ni, Cu, K, and/or Zn are also detected. In carbon-bearing compounds, Ca typically follows wood veins. In wood, Fe and Ti are diffused uniformly. In contrast, charcoal samples can contain particles of Fe, Ti, and/or Ca. The overall impurity content in the pine charcoal sample is higher than in the pine woodchip, suggesting that the charcoalization process introduces unintentional contamination. During reduction, silica evolution is analyzed in parallel to Fe. Fe is predominantly clustered in minerals which influence its oxidation state. Here, Fe is embedded in muscovite with predominance of Fe℗đ+. Initially, Fe is affected by the decomposition of muscovite and it is found as Fe²+; as muscovite disappears, Fe diffuses in the molten silica, segregating towards interfaces. Contrary to thermodynamic expectation, Fe is oxidized until late in the reduction process as the silica melt protects it from gases present in the furnace, hence minimizing its reduction, only partially measured at high temperatures. After reduction, the initial low- to sub- ppmw concentrations measured in the precursor quartz increase drastically in the MG-Si. The refining process is responsible for the increased contamination. Yet, most impurities are clustered at grain boundaries and a leaching process could remove them. Electrical fragmentation and a leaching treatment are tested as a method to expose grain boundaries of "dirty" quartzite and to remove impurities. The selective fragmentation proves to be a very important step in removing impurities via leaching.
by Sarah Bernardis.
Ph. D.
Papakirillou, Ismini. "A metallurgical study of West African iron monies from Cameroon and Liberia". Thesis, Massachusetts Institute of Technology, 2009. http://hdl.handle.net/1721.1/55263.
Pełny tekst źródłaCataloged from PDF version of thesis.
Includes bibliographical references (p. 200-202).
The aim of this thesis is to make a contribution to the study of West African iron monies through examination and analysis of a group of these objects in the collection of the Peabody Museum of Archaeology and Ethnology at Harvard University. The selection of objects from the collection includes five distinct types, representing different sizes and shapes that have been identified as monies/exchange mediums. All of these object types were originally part of a bundle or remain in bundled form; all share a provenience in West Africa, four groups in present day Cameroon and one in Liberia. The research corpus of material has dates ranging from the late nineteenth to the early twentieth century. My metallurgical studies of West African iron monies are the first such investigations to have been carried out. The results will contribute to the appreciation of the ways in which iron 'monies' functioned within late nineteenth - early twentieth century West African societies.
by Ismini Papakirillou.
S.M.
Cooney, Elizabeth Myers. "Bronze metallurgy in Iron Age central Europe : a metallurgical study of Early Iron Age bronzes from Stična, Slovenia". Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/39480.
Pełny tekst źródłaThis electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Includes bibliographical references (v. 2, p. 375-377).
The Early Iron Age (750-450 BCE) marks a time in the European Alpine Region in which cultural ideologies surrounding bronze objects and bronze production were changing. Iron was becoming the preferred material from which to make many utilitarian objects such as weapons and agricultural tools; this change can be clearly seen in the different treatments of bronze object deposits from the Late Bronze Age to the Early Iron Age. The Early Iron Age hillfort settlement of Sticna in what is now southeastern Slovenia was one of the first incipient commercial centers to take advantage of the new importance placed on iron, conducting trade with Italy, Greece, the Balkans, and northern Europe. This metallurgical study of bronze funerary objects from Sticna identifies construction techniques, use patterns, and bronze metallurgical technologies from the ancient region of Lower Carniola. This information is then used to explore the cultural importance of bronze at Early Iron Age Sticna and to compare the bronze work of Lower Carniola with that of other regions in central Europe and Italy from this time of great change in Iron Age Europe.
S.M.
Payton, Eric John. "Characterization and Modeling of Grain Coarsening in Powder Metallurgical Nickel-Based Superalloys". The Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=osu1250265477.
Pełny tekst źródłaJönsson, Martin. "The Atmospheric Corrosion of Magnesium Alloys : Influence of Microstructure and Environments". Doctoral thesis, KTH, Kemi, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4545.
Pełny tekst źródłaQC 20100802
Duffey, Matthew James. "Metallurgical Characterization and Weldability Evaluation of Ferritic and Austenitic Welds in Armored Steels". The Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1460910681.
Pełny tekst źródłaBoster, Connor M. Boster. "Metallurgical Characterization and Testing of Dissimilar Metal Welds for Service in Hydrogen Containing Environments". The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1524179509481363.
Pełny tekst źródłaSemykina, Anna. "Recovery of iron and manganese values from metallurgical slags by the oxidation route". Doctoral thesis, KTH, Materialens processvetenskap, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-24534.
Pełny tekst źródłaQC 20100916
Muwanguzi, Abraham Judah Bumalirivu. "Characterisation of Muko iron ores (Uganda( for defferent routes of iron production". Licentiate thesis, KTH, Materialvetenskap, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-25037.
Pełny tekst źródłaQC 20101007
Sustainable Technological Development in the Lake Victoria Region
Zhang, Zhi. "A study of flow fields during filling of a sampler". Licentiate thesis, KTH, Materials Science and Engineering, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-10693.
Pełny tekst źródłaMore and more attention has been paid to decreasing the number and size of non-metallic inclusions existing in the final products recently in steel industries. Therefore, more efforts have been made to monitor the inclusions' size distributions during the metallurgy process, especially at the secondary steelmaking period. A liquid sampling procedure is one of the commonly applied methods that monitoring the inclusion size distribution in ladles, for example, during the secondary steelmaking. Here, a crucial point is that the steel sampler should be filled and solidified without changing the inclusion characteristics that exist at steel making temperatures. In order to preserve the original size and distributions in the extracted samples, it is important to avoid their collisions and coagulations inside samplers during filling. Therefore, one of the first steps to investigate is the flow pattern inside samplers during filling in order to obtain a more in-depth knowledge of the sampling process to make sure that the influence is minimized.
The main objective of this work is to fundamentally study the above mentioned sampler filling process. A production sampler employed in the industries has been scaled-up according to the similarity of Froude Number in the experimental study. A Particle Image Velocimetry (PIV) was used to capture the flow field and calculate the velocity vectors during the entire experiment. Also, a mathematical model has been developed to have an in-depth investigate of the flow pattern in side the sampler during its filling. Two different turbulence models were applied in the numerical study, the realizable k-ε model and Wilcox k-ω model. The predictions were compared to experimental results obtained by the PIV measurements. Furthermore, it was illustrated that there is a fairly good agreement between the measurements obtained by PIV and calculations predicted by the Wilcox k-ω model. Thus, it is concluded that the Wilcox k-ω model can be used in the future to predict the filling of steel samplers.
Kero, Ida. "Ti3SiC2 synthesis by powder metallurgical methods". Licentiate thesis, Luleå tekniska universitet, Materialvetenskap, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-17858.
Pełny tekst źródłaGodkänd; 2007; 20070523 (ysko)
Wang, Haijuan. "Investigations on the Oxidation of Iron-chromium and Iron-vanadium Molten Alloys". Doctoral thesis, KTH, Materialens processvetenskap, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-12955.
Pełny tekst źródłaQC20100628
Donald, Jeffrey Richard. "Surface interactions between non-ferrous metallurgical slags and various refractory materials". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp02/NQ27913.pdf.
Pełny tekst źródłaRigual, David Andrés. "Metallurgical characterization of self catalytic structural materials for sulfuric acid decomposition". Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/34654.
Pełny tekst źródłaIncludes bibliographical references (p. 276-279).
Eight heats of material with base alloy chemistries of Alloys 800 HT or 617 with platinum additions of 2, 5, 15, or 30 wt% have been characterized according to their microstructural features. The goals of characterization were to determine metallurgical stability for service as self-catalytic structural materials. The results presented herein will be useful to the development of a material for the construction of a heat exchanger designed for sulfuric acid decomposition. This type of heat exchanger is a key component to hydrogen generation by the thermochemical sulfur-iodine water-splitting process, a future technology that promises efficient hydrogen production if coupled to a Generation IV nuclear reactor heat source. Characterization of each material was carried out in the cast and wrought conditions with optical and SE microscopy, electron dispersive spectrometry, chemical composition analysis, and thermodynamic modeling. Materials have been characterized according to grain size and morphology, precipitate features, twinning characteristics, and platinum composition effects. Results indicate that platinum and carbon compositions have the greatest effect on the development of microstructural features.
(cont.) Increasing platinum compositions in both base alloy chemistries fosters the presence of annealing twins, which indicates that platinum additions reduce stacking fault energy within the alloy systems. Platinum additions appear to cause the development of larger grain structures as well as increase corrosion resistance. With the exception of the Alloy 800 HT - 30 wt% Pt system, the alloy systems characterized herein were melted with carbon contents between 1.2 - 3.6 times higher than the maximum specified compositions for the base chemistries. Excessive inter and intra-granular carbide precipitation resulted, which leads to compromised corrosion resistance and mechanical properties. Inter-granular attack due to sensitization is observed in the Alloy 800 HT - 2, 5 wt% Pt systems. SEM micrographs of the Alloy 617 - Pt systems show that these systems are less prone to inter-granular attack. The grain structures of each base alloy - Pt system are much finer than those of the respective base alloy systems included for comparison. Fine grain structures are detrimental to overall ductility and high temperature creep strength. On average, the Alloy 800 HT - Pt systems developed larger grains than the Alloy 617 - Pt systems.
(cont.) A two phase microstructure that resembles pearlite developed in the Alloy 617 - 30 wt% Pt system. This alloy system will be excluded from further characterization for self catalytic structural application due to expected poor mechanical and corrosion resistance properties. The most important microstructural improvements for the development of a self-catalytic structural material include a reduction of carbon content and an increase in grain size. Further characterization of catalytic, corrosion resistance, and mechanical properties are required for selection of the optimum platinum addition to the base chemistries of Alloys 800 HT and 617 for sulfuric acid decomposition service.
by David Andrés Rigual.
S.M.
Andersson, Emil. "Online Metallurgical Mass Balance and Reconciliation". Thesis, Umeå universitet, Institutionen för fysik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-185252.
Pełny tekst źródłaI malmanrikning, är flotation en av de viktigaste och mest mångsidiga metoderna. Flotation utnyttjar de fysikaliska ytegenskaperna som partiklar av värdemineral har för att separera dessa från det mindre värdefulla gråberget i malmen. Krossad och mald malm blandas med vatten och matas in i flotationstankar. I flotationstankarna görs partiklarna av värdemineral hydrofobiska. På så vis kan de fästa sig vid luftbubblor och flyta till ytan och bilda ett skum. Detta skum samlas sedan ihop och behandlas vidare eftersom det innehåller en högre koncentration av värdemineral. Flotationskretsen styrs och underhålls med hjälp av mätningar av massflödena och halterna av de olika ämnena som finns i kretsen. På grund av ekonomiska, praktiska, och teknologiska hinder kan dessa mätningar bara göras på ett utvalt antal punkter i kretsen samt bara vid diskreta tillfällen. Felaktigt data kan ha förödande konsekvenser om operatörerna lämnas med begränsad information och processen fortlöper med oupptäckta fel. Mätsäkerheten kan förbättras med hjälp av massbalansering och haltjustering. Traditionellt görs massbalansering genom att summera den totala massan som löpt genom kretsen samt medelvärden av halterna över lång tid för att undvika att räkna in den interna massan i systemet. Det är önskvärt att utföra massbalansering direkt för att möjliggöra snabbare ingrepp ifall fel uppstår i kretsen under den fortlöpande processen. Denna rapport beskriver en dynamisk lösning för massbalansering och justering av massflöden och halter i en flotationskrets. Här används fysikaliska modeller av kretsen för att konstruera bivillkor för massbalans med hjälp utav interpolation och testfunktioner och massbalanseringsproblemet ställs upp som ett optimeringsproblem. Optimeringen sker genom att justera mätserien så att residualen, skillnaden mellan det uppmätta värdet och det justerade värdet, minimeras under uppfyllande av mass balans. En implementation i MATLAB och tester på syntetisk data visar att den dynamiska formuleringen av massbalans justerar de felaktiga mätvärdena så att massbalans uppfylls. Med det resultatet i åtanke, finns det fortfarande viktiga aspekter av implementationen som bör tas hänsyn till. Modellen använder de okända och cellspecifika parametrarna flotationshastighet och utbytet och dessa måste kunna bestämmas för att denna modell ska kunna användas. Ett förslag på modellering av flotationshastigheten föreslås i rapporten. Dessutom ges förslag på strategier att hitta utbytet. Kraven på noggrannhet och snabbhet diskuteras också. Möjliga nästa steg för projektet är att vidareutveckla en tidseffektiv implementation genom att använda syntetiska data. Därefter kan en implementation för naturligt data verifiera modellerna.
Ma, Taoran. "Powder-metallurgical processing and phase separation in ternary transition metal carbides". Doctoral thesis, KTH, Materialvetenskap, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-207839.
Pełny tekst źródłaQC 20170529
Stella, Piergiorgio. "Powder metallurgy: investigation of metallurgical and technological aspects and potential applications for critical components of turbomachineries". Doctoral thesis, Università degli studi di Trento, 2016. https://hdl.handle.net/11572/369124.
Pełny tekst źródłaStella, Piergiorgio. "Powder metallurgy: investigation of metallurgical and technological aspects and potential applications for critical components of turbomachineries". Doctoral thesis, University of Trento, 2016. http://eprints-phd.biblio.unitn.it/1688/1/PhD_tesi_STELLA.pdf.
Pełny tekst źródłaMoosberg-Bustnes, Helena. "Fine particulate by-products from mineral and metallurgical industries as filler in cement-based materials /". Luleå, 2003. http://epubl.luth.se/1402-1544/2003/36.
Pełny tekst źródłaSaeed, Mohazzam. "Exploring effects of hydrodynamic flotation variables on their respective metallurgical responses through laboratory scaling up". Thesis, Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-87078.
Pełny tekst źródłaLotfian, Samira. "Alternative reducing agents in metallurgical processes : Experimental study of thermal characterization of shredder residue material". Licentiate thesis, Luleå tekniska universitet, Mineralteknik och metallurgi, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-26641.
Pełny tekst źródłaGodkänd; 2016; 20160517 (samlot); Nedanstående person kommer att hålla licentiatseminarium för avläggande av teknologie licentiatexamen. Namn: Samira Lotfian Ämne: Processmetallurgi /Process Metallurgy Uppsats: Alternative Reducing Agents in Metallurgical Processes Experimental Study of Thermal Characterization of Shredder Residue Material Examinator: Professor Caisa Samuelsson, Institutionen för samhällsbyggnad och naturresurser, Avdelning: Mineralteknik och metallurgi, Luleå tekniska universitet. Diskutant: PhD Noureddine Menad, BRGM, Geoscience for Sustainable Earth, France. Tid: Fredag 17 juni, 2016 kl 10.00 Plats: F343, Luleå tekniska universitet
Erkers, Louise, i Felicia Fröjd. "Metallurgical Analysis of Viking Age Amulet Rings : and Comparison With Cutting Tools". Thesis, KTH, Materialvetenskap, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-209778.
Pełny tekst źródłaHistoriska föremål, kallade amulett ringar vilket är ett slags vikingatida smycken, har hittats vid arkeologiska utgrävningar av vikingatida boplatser. Man har inte hittat något praktiskt användningsområde för ringarna, utan de tros vara av kulturell eller religiös betydelse. Deras funktion är dock oklar, likaså detaljerna angående tillverkningen och materialvalet för ringarna.Denna studie undersöker mikrostrukturen av amulett ringar från Dalarna i Sverige. För att kunna dra slutsatser om hur mycket arbete som lades på ringarna genomförs en jämförelse med medeltida eggverktyg. Eftersom eggverktyg gjordes med omsorg för att få rätt materialegenskaper för att vara vassa och hårda kan man jämföra dessa med ringarna. Analyserna visade att amulett ringarna var gjorda av lågkolhaltigt heterogent stål som indikerar enbart lite eller ingen vällning och ett dåligt utgångsmaterial. Tillskillnad från eggverktygen som uppvisade en homogen mikrostruktur som ofta innehöll perlit vilket tyder på relativt hög kolhalt. Följaktligen framstår det som att vikingatida smeder inte la ned särskilt mycket tid i smidesprocessen vid tillverkningen av amulett ringar.Denna studie innefattar också smidet av en ny kniv från ett lågkolhaltigt stål för att se om det är möjligt att lösa in kol i ytan genom smidet. Detta var dock svårt att göra utan dagens tekniska utrustning vilket gjorde att resultatet inte visade någon uppkolning.
Martello, Robert 1968. "Paul Revere's metallurgical ride : craft and proto-industry in early America". Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/109637.
Pełny tekst źródłaNordgren, Eric. "The effect of metallurgical structure on the chloride-induced corrosion of archaeological wrought iron". Thesis, Cardiff University, 2016. http://orca.cf.ac.uk/97535/.
Pełny tekst źródłaOgwuda, Olisanwendu Ikechukwuka. "Materials science appraisal of recycled construction materials for roadways". Thesis, Abertay University, 2007. https://rke.abertay.ac.uk/en/studentTheses/70d295b3-60d9-427e-a012-c9cc05ac83e1.
Pełny tekst źródłaFischbein, Ellinor, i Felicia Larsson. "Metallurgical analysis of some osmund iron from Sweden and Estonia : A short historical review of medieval iron production and export". Thesis, KTH, Materialvetenskap, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-298414.
Pełny tekst źródłaUnder medeltiden var Sverige en eftertraktad exportör av högkvalitativt järn i Europa. Osmundjärn kunde produceras i en blästerugn, men det mesta osmundjärnet framställdes i masugnen. Därefter färskades järnet och höggs upp i delar. Tidigare analyser definierar osmundjärns utseende, egenskaper, mikrostruktur och spårämnen. De var ofta slaggrika och varierade mycket i kolhalt, andel inneslutningar, mikrostruktur och mängd korrosion. I den här studien analyserades osmundjärn relaterat till medeltida järnframställning, export och kvalité. Det gjordes genom att jämföra mikrostrukturer och slagginneslutningar i svenska och estniska prover av medeltida järn, genom analyser i SEM-EDS och i ljusmikroskop. De estniska proverna hade mer slagginneslutningar. Proverna med korroderade inneslutningar/slagg uteslöts ur analysen. Den varierande mikrostrukturen kan kopplas till kylningshastigheten och själva produktionen i masugnen, blästerugnen och färskningsprocessen. Det gav material med dåliga egenskaper. En stor andel prover hade en sida med högre kolhalt och den andra delen hade lägre kolhalt. Järnet med lägre kolhalt kan kopplas till att komma från blästerugnen och det med högre kolhalt till masugnen. De proverna som innehöll högre halter kiseldioxid, magnesium och kalcium kan kopplas till masugnen. De svenska proverna hade sammanfattningsvis bättre kvalité än de estniska och alla bitar ansågs komma från masugnen.
Forclaz, A. "Variational methods in materials science". Thesis, University of Oxford, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.249532.
Pełny tekst źródłaRouet-Leduc, Bertrand. "Machine learning for materials science". Thesis, University of Cambridge, 2017. https://www.repository.cam.ac.uk/handle/1810/267987.
Pełny tekst źródłaHartmann, Markus. "Lattice models in materials science". Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 2006. http://dx.doi.org/10.18452/15432.
Pełny tekst źródłaThis thesis presents the results of investigations on three independent research topics of modern biophysical and materials science research: substitutional diffusion in binary alloys, the remodelling process in trabecular bone and the prediction of mechanical properties of self assembling, amphiphilic bilayers. The basic description of all three projects is based on lattice models, a highly successful class of models that are used in several fields of modern physics to describe physical processes. For the diffusional process in alloys, which on a microscopic scale manifests in a discrete site exchange between one atom and a neighbouring vacancy, it was investigated how this microscopic description can be reconciled with a macroscopic continuum model. For the investigations on remodelling of trabecular bone, the architecture of bone was mapped onto a lattice and the local mechanical state of each element was determined by a simplified mechanical model. A stochastic description was chosen to model the time evolution of the system, relating the probability of bone formation and resorption, respectively, to the local volume changes of the bone elements. It was shown that a non-linear remodelling law is a better candidate to describe the remodelling process in real bone than a linear one. Furthermore, applying the model to osteoporosis - a wide spread bone disease - it was shown that in the features attributed to osteoporosis one has to distinguish between normal ageing of bone''s architecture and additional changes that stem from pathological alterations in the regulatory system. A simple concept was introduced to model the mechanical properties of self-assembled membranes. The molecules forming the membrane are assumed to occupy a triangular lattice, nearest neighbours are connected by linear elastic springs. It was shown that the bending rigidity exhibits a pronounced concentration dependence, varying over orders of magnitude in a narrow concentration regime.
Perez, Demydenko Camilo. "Static and dynamic disorder in nanocrystalline materials". Doctoral thesis, Università degli studi di Trento, 2019. https://hdl.handle.net/11572/368145.
Pełny tekst źródłaPerez, Demydenko Camilo. "Static and dynamic disorder in nanocrystalline materials". Doctoral thesis, University of Trento, 2019. http://eprints-phd.biblio.unitn.it/3636/1/CAMILO_PEREZ_DEMYDENKO_thesis_PhD.pdf.
Pełny tekst źródłaAldén, Rickard. "Metallurgical investigation in weldability of Aluminium Silicon coated boron steel with different coating thickness". Thesis, KTH, Materialvetenskap, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-171209.
Pełny tekst źródłaMaguire, John F. "Contributions to materials science and engineering". Thesis, Ulster University, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.515891.
Pełny tekst źródłaStoleriu, Iulian. "Integro-differential equations in materials science". Thesis, University of Strathclyde, 2001. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=21413.
Pełny tekst źródłaBehera, Balaram Bijayakumar, i Neeraj Vimal Prasad. "Erosion wear of materials". Thesis, 2007. http://ethesis.nitrkl.ac.in/4192/1/Erosion_Wear_of_Materials.pdf.
Pełny tekst źródłaNoecker, Fredrick F. II. "Metallurgical investigation into ductility dip cracking in nickel based alloys". 2007. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3285743.
Pełny tekst źródłaIslam, Rashed Adnan. "Composition - microstructure - property relationships in dual phase bulk magnetoelectric composite". 2008. http://hdl.handle.net/10106/957.
Pełny tekst źródłaDutta, Surajeet Kumar. "Study of the Chemical Composition and Energy value of Woody Biomass Species". Thesis, 2008. http://ethesis.nitrkl.ac.in/121/1/surajeet.pdf.
Pełny tekst źródłaMishra, Barun, i Sandeep Kumar Baliarsingh. "Kinetics of Iron Ore Reduction by Coal and Charcoal". Thesis, 2008. http://ethesis.nitrkl.ac.in/124/1/10404014.pdf.
Pełny tekst źródłaKrishnan, Tintula, i Subhram Keshary Singh. "Reduction Kinetics of iron ore pellets and the effect of Binders". Thesis, 2008. http://ethesis.nitrkl.ac.in/125/1/10404011.pdf.
Pełny tekst źródłaGaur, Ankur. "Effect of Strain Ageing On Welded or Nonwelded Low Carbon Steel". Thesis, 2009. http://ethesis.nitrkl.ac.in/1157/1/strain_ageing.pdf.
Pełny tekst źródłaArvind, K. "J-R Behaviour of 20MnMoNi55 Pressure Vessel Steel". Thesis, 2009. http://ethesis.nitrkl.ac.in/1395/2/bmdthesis.pdf.
Pełny tekst źródłaAkarapu, Ashok. "Surface Property Modification of Copper by Nanocomposite Coating". Thesis, 2011. http://ethesis.nitrkl.ac.in/2778/1/Ashok_thesis_final.pdf.
Pełny tekst źródłaMadhukar, Poloju. "Synthesis and Characterization of ZnO Nanostructures and Synthesis of Zn/Al2O3 Nanocomposite by Mechanical Alloying Route". Thesis, 2011. http://ethesis.nitrkl.ac.in/2785/1/madhukar_thesis.pdf.
Pełny tekst źródłaVerma, Preeti. "Ratcheting Fatigue Behaviour and Post-fatigue Tensile Properties of Commercial Aluminium". Thesis, 2011. http://ethesis.nitrkl.ac.in/2788/1/Final_thesis-Preeti.pdf.
Pełny tekst źródłaMallik, Manila. "Effect of microstructure on the indentation creep behaviour of 2.25Cr-1Mo and its comparison with modified 9Cr-1Mo ferritic steel". Thesis, 2011. http://ethesis.nitrkl.ac.in/2891/1/manila_final_thesis.pdf.
Pełny tekst źródłaNath, Chirag Ranjan, i Sanup Kumar Panda. "Fatigue Life Estimation of Pre-corroded 7075 Aluminium Alloy". Thesis, 2012. http://ethesis.nitrkl.ac.in/3211/1/Final_B.Tech_Thesis.pdf.
Pełny tekst źródłaGupta, Mukul, i Himanshu Baghel. "Reduction and Swelling Behaviour of Fired Iron Ore Pellets". Thesis, 2012. http://ethesis.nitrkl.ac.in/3268/1/Final_Edit.pdf.
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