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Dissertations / Theses on the topic 'Metallurgy'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Hoffman, Kelsey Llyn. "Neutron star metallurgy." Thesis, University of British Columbia, 2011. http://hdl.handle.net/2429/38311.

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The crust of a neutron star plays an important role in the emission observed from it. The thermal emission generated in the core of the neutron star passes through the crust, thus it is important to know what is in the crust in order to understand how the emission is shaped and altered. The crust itself may be responsible for the observations of glitches from neutron stars and also as a source of gravitational waves. This thesis is two-fold. The first goal is to calculate the composition of the neutron star crust of a non-accreting neutron star. The second is to use the calculated crustal comp

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2

Bennett, Anna. "Copper metallurgy in central Thailand." Thesis, University of London, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.338123.

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3

Konchenko, Ekaterina. "Resource saving technology in metallurgy." Thesis, Видавництво СумДУ, 2007. http://essuir.sumdu.edu.ua/handle/123456789/12836.

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The consumption of coal and coke in the blast furnace is met on the one hand by the market or on the other hand by the own production. It depends on the conditions of the market and the availability of production facilities. World-wide the production of hot metal and crude steel via the blast furnace/converter route is regarded as the dominant process line also in future. Consequently, after their successes in the past, the ironmaking and steelmaking industry have joined their efforts with the cokemaking industry to exploit still more development potentials for hot metal production. When you a

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4

Смоленніков, Денис Олегович, Денис Олегович Смоленников, Denys Olehovych Smolennikov, et al. "Environmentally friendly metallurgy in Ukraine." Thesis, Сумський державний університет, 2013. http://essuir.sumdu.edu.ua/handle/123456789/31624.

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According to the report of international analytical organization World Steel Association (WSA), Ukraine took the 10th place in the world’s steel production in 2012. Traditional steel smelting technology such as usage of Marten’s furnaces with natural gas as fuel causes 3 million tons of waste products a year per one furnace. Pollutants include NOx, CO, SOx and heavy metals dust. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/31624

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5

Morgan, Martha E. "Reconstructing Early Islamic Maghribi Metallurgy." Diss., The University of Arizona, 2009. http://hdl.handle.net/10150/194119.

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Interactions in culture, science, and technology in early Islamic North Africa are studied through an examination of Maghribi metallurgy. My dissertation, based on the Social/Cultural Construction of Technology (SCOT) model (Bijker 1997), explores the impact of the Islamic religion and culture on scientific and technological change in the spheres of gold and silver minting, copper working, and iron smelting towards reconstructing the role and impact of metals in Islamic society. The purpose of my reconstruction is to define and contextualize early Islamic Maghribi metallurgy for a region and t

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6

Holmes, Shaun Ryan. "Powder metallurgy dual alloy disc solutions." Thesis, University of Cambridge, 2012. https://www.repository.cam.ac.uk/handle/1810/252259.

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7

Mellanby, I. J. "The fatigue of powder metallurgy steels." Thesis, University of Nottingham, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.328433.

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8

Weeks, L. R. "Pre-Islamic metallurgy of the Gulf." Thesis, The University of Sydney, 2000. https://hdl.handle.net/2123/27763.

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The thesis presents a study of early metal production, exchange and use in the Gulf region. The focus is exclusively on the use of copper and its alloys, from the Bronze Age to the late pre-Islamic period. Issues addressed include technological aspects of early alloy production, the trade in metallic resources in the Gulf region, and the socioeconomic importance of the early use of tin and tin-bronze in early Western Asia.

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9

Correa, Zapisotski David, and Martin Wallhed. "Characterizing flowability of metal powders." Thesis, KTH, Materialvetenskap, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-254754.

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Powder metallurgy is a growing field with much potential. The core purpose and problem in this work is attempting to describe and understand what and how metal powder properties impact powder flowability. Several powder flow experiments have been performed on eight different metal powders with varying size and of material types to examine correlations and seeing what parameters are important for a well flowing metal powder. Experiments performed consists of hall flow, tap density, angle of repose and a more complex Rheometer analysis. The results found display plenty correlations between diffe

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10

Caliskan, Necmettin Kaan. "Powder Metallurgy Of W-ni-cu Alloys." Master's thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/2/12607576/index.pdf.

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In the present study<br>the effects of the powder metallurgical parameters such as the mixing method, compaction pressure, initial tungsten (W) particle size, composition, sintering temperature and sintering time on the sintering behavior of selected high density W-Ni-Cu alloys were investigated. The alloys were produced through conventional powder metallurgy route of mixing, cold compaction and sintering. The total solute (Ni-Cu) content in the produced alloys was kept constant at 10 wt%, while the copper concentration of the solutes was varied from 2.5 wt% to 10 wt%. Mainly liquid phase sint

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11

Fu, Eliana Koon Yee. "Production of titanium aluminides by powder metallurgy." Thesis, Imperial College London, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.286396.

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12

Kayafa, Maria. "Bronze Age metallurgy in the Peloponnese, Greece." Thesis, University of Birmingham, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.323407.

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13

Krupic, Vahid-Beg. "Metallurgy and magnetoelasticity of samarium-iron alloys." Thesis, University of Salford, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.335555.

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14

Lawal, G. I. "The metallurgy of copper-iron powder composites." Thesis, University of Leeds, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.233184.

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15

Zhu, Yao-Hua. "Physical metallurgy of Zn-Al based alloys." Thesis, Aston University, 2006. http://publications.aston.ac.uk/21803/.

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16

Stewart, Johnny. "The metallurgy and metallography of archaeological iron." Thesis, University of Cambridge, 1997. https://www.repository.cam.ac.uk/handle/1810/273022.

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17

Liu, Tong. "Construction of Supramolecular Structures by Mimicking Metallurgy." University of Akron / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=akron160370390740064.

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18

Govan, Premesh. "Manipulating aqueous chemistry environments in extractive metallurgy." Master's thesis, University of Cape Town, 2010. http://hdl.handle.net/11427/10529.

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The Anglo Research Nickel (ArNi) process is a novel extractive metallurgical process that arose out of the need to develop a processing route for the recovery of nickel from lateritic ore deposits that is both economical and environmentally acceptable.

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19

Chen, Xiaolin. "Particle packing, compaction and sintering in powder metallurgy." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0014/NQ34746.pdf.

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20

Smith, Lyndon Neal. "A knowledge based system for powder metallurgy technology." Thesis, University of the West of England, Bristol, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.364080.

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21

Ekengård, Johan. "Slag/Metal Metallurgy in Iron and Steel Melts." Doctoral thesis, KTH, Tillämpad processmetallurgi, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-187228.

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In this work, the metal and slag phase mixing in three steps of a ladle refining operation of steel melts and for an oxygen balance during cooling of cast iron melts have been studied at two Swedish steel plants and at two Swedish cast iron foundries, respectively. In order to predict the oxygen activity in the steel bulk in equilibrium with the top slag as well as in metal droplets in the top slag in equilibrium with the top slag, three slag models were used. In addition, the assumptions of a sulphur-oxygen equilibrium between steel and slag and the dilute solution model for the liquid steel

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22

Carroll, Robert Ian. "Surface metallurgy and rolling contact fatigue of rail." Thesis, University of Sheffield, 2006. http://etheses.whiterose.ac.uk/14639/.

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This thesis presents the results of an investigation into the effect of surface metallurgy on the rolling contact fatigue behaviour of rail. The investigation has used laboratory based rolling/sliding twin disc testing of samples with a surface metallurgical feature simulated on them. The samples used in laboratory testing have been compared with samples of rail removed from track. Two surface metallurgical features have been investigated: decarburisation and white etching layer. Decarburisation is the loss of carbon from the surface of the rail due to oxidation at high temperatures, resulting

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23

Moravčíková, de Almeida Gouvea Larissa. "Metal Matrix Composites Prepared by Powder Metallurgy Route." Doctoral thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-445180.

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Vývoj nových materiálů pro součásti v moderních technologiích vystavené extrémním podmínkám má v současné době rostoucí význam. Děje se tak v důsledku neustále se zvyšujících požadavků průmyslových odvětví na lepší konstrukční vlastnosti nosných materiálů. Ve světle těchto faktů si tato studie klade za cíl posoudit nové složení slitin s vysokou entropií, které se vyznačují vysokým aplikačním potenciálem pro kritické aplikace. Slitiny jsou připravovány práškovou metalurgií, t.j. kombinací mechanického legování a slinování v pevné fázi. Pro účely srovnávaní vlastností jsou vybrané kompozice vyro

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24

Tucker, Laura Arias. "Microstructure-property relations throughout the powder metallurgy process." Master's thesis, Mississippi State : Mississippi State University, 2007. http://library.msstate.edu/etd/show.asp?etd=etd-11092007-005857.

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25

Moravčík, Igor. "Metal Matrix Composites Prepared by Powder Metallurgy Route." Doctoral thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2017. http://www.nusl.cz/ntk/nusl-367507.

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Ve všeobecnosti, poznatky o design slitin, jejich výrobě a výběru legujúcich prvků sú omezené na slitiny s jedním základním prvkem. Tento fakt ale výrazně limituje možnosti a volnost výběru prvků pro dosáhnuti speciálních vlastností a mikrostruktur. V poslední dekádě se ukázalo, že materiálová věda a inženýrství nejsou ještě zdaleka prozkoumané v důsledku objevu nové třídy materiálů nazvané vysoko entropické slitiny (HEA high entropy alloys). Jejich objev upoutal pozornost vědecké komunity. Základní koncept pro jejich design je, že namísto jednoho, nebo dvou základních prvků obsahují minimálně

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26

Festa, Marcella <1985&gt. "Bronze age communities and bronze metallurgy in Xinjiang." Doctoral thesis, Università Ca' Foscari Venezia, 2017. http://hdl.handle.net/10579/12881.

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La ricerca verte sulla metallurgia dell’Età del Bronzo nello Xinjiang (ca.2000-1000 a.C.). L’obiettivo è triplice: 1) indagare l’occupazione della regione da parte delle prime comunità dell’Età del Bronzo, in termini spazio-temporali, e delineare il contesto economico-culturale in cui la metallurgia si è sviluppata; 2) individuare i contributi apportati da influenze esterne riconoscendo, ove possibile, interazioni culturali tra le comunità dello Xinjiang e delle regioni circostanti (specialmente Asia Centrale, Siberia sud-occidentale e Cina); 3) fare luce sul ruolo dello Xinjiang nel sistema d

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27

Upadhyay, P. L. "Production of Nbsub(3)Sn conductors by powder metallurgy." Thesis, University of Oxford, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.370305.

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28

Lawday, Mark James. "The metallurgy and processing of high strength aluminium alloys." Thesis, University of Nottingham, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.490831.

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The relationship between alloy composition, microstructure, mechanical and thermal processing and mechanical properties (strength and toughness) in 2xxx (Al-Cu-Mg) and 7xxx (Al-Mg-ZnCu) series aluminium alloys has been investigated for use in the production of high-strength lightweight components.

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29

Zeybek, Asim. "Characterization of industrial powder metallurgy produced 410L ODS steel." Thesis, Open University, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.580143.

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30

Tahir, Abdul Malik. "Alloy element redistribution during sintering of powder metallurgy steels." Doctoral thesis, KTH, Fysiokemisk strömningsmekanik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-145251.

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Homogenization of alloying elements is desired during sintering of powder metallurgy components. The redistribution processes such as penetration of liquid phase into the interparticle/grain boundaries of solid particles and subsequent solid-state diffusion of alloy element(s) in the base powder, are important for the effective homogenization of alloy element(s) during liquid phase sintering of the mixed powders. The aim of this study is to increase the understanding of alloy element redistribution processes and their effect on the dimensional properties of the compact by means of numerical a

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31

Williams, Katherine E. (Katherine Edith). "An examination of Maya metallurgy, 1150 to 1544 A.D." Thesis, Massachusetts Institute of Technology, 1990. http://hdl.handle.net/1721.1/32576.

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32

Jiang, Xia. "Development of Al alloy composites by powder metallurgy routes." Thesis, University of Oxford, 2014. http://ora.ox.ac.uk/objects/uuid:ee89b51e-386d-48c8-8f45-161e94490fb6.

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Particulate reinforced Al alloy composites (AlMCs) are recognized as important structural materials due to their lightweight, high modulus and strength and high wear resistance. In order to understand the effect of matrix, reinforcement and secondary processing techniques on the microstructure development and mechanical properties of AlMCs produced by powder metallurgy routes, Al alloy composites reinforced with three types of reinforcements by different secondary processing techniques have been produced and examined. Fabrication of Al or 6061Al alloy based composites reinforced with nano-size

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33

Hunt, Ortiz Mark A. "Prehistoric mining and metallurgy in south west Iberian peninsula /." Oxford : Archaeopress, 2003. http://catalogue.bnf.fr/ark:/12148/cb39142582n.

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34

Lundkvist, Katarina. "A Process Integration Approach to Assessing Possibilities for Improved Material Efficiency in Nordic ore-based Iron- and Steelmaking Systems." Licentiate thesis, Luleå tekniska universitet, Mineralteknik och metallurgi, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-76435.

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Iron- and steel production is a material- and energy intensive industrial activity. The production of one tonne of steel commonly results in some 400 kilograms of residual materials such as metallurgical slags, dusts, sludge and scales generated in the processes. Much work is continuously devoted to finding possible ways of using residual materials and minimising landfilled volumes. As these materials often contain considerable amounts of valuable elements such as iron, coal, manganese and calcium, it may be profitable to use them to replace virgin raw materials or to sell them as products tha

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35

Mazumdar, Dipak 1932. "Fluid flow, particle motion and mixing in ladle metallurgy operations." Thesis, McGill University, 1985. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=72064.

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Extensive computer predictions have been carried out by the author to study flow, addition dispersion and particle motion during central gas injection into cylindrical vessels. In conjunction with numerical computations, experiments were conducted in a 0.30 scale water model of a 150 ton steel processing ladle, using a Froude number scaling criterion. Two typical gas injection configurations (i.e., conventional central injection and C.A.S. alloy addition procedure) were investigated.<br>Flow visualization studies were carried out using a suspended network of silken threads, mean velocity vecto

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36

Cherian, Roy Pullukattu. "Intelligent systems for design and manufacture of powder metallurgy components." Thesis, University of the West of England, Bristol, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.327476.

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37

Lleras-Perez, Roberto. "Prehispanic metallurgy and votive offerings in the eastern Cordillera, Colombia." Thesis, University College London (University of London), 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.264660.

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38

Peters, Michael Andrew. "The physical metallurgy of β/β' NiTi/Ni₂TiAl alloys". Thesis, University of Cambridge, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.624799.

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39

Tung, David C. "Welding Metallurgy of Nickel-Based Superalloys for Power Plant Construction." The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1449164834.

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40

LICAUSI, MARIE-PIERRE. "Analysis of tribocorrosion behavior of biomedical powder metallurgy titanium alloys." Doctoral thesis, Universitat Politècnica de València, 2017. http://hdl.handle.net/10251/90448.

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Titanium and its alloys have been widely used in oral implantology due to their mechanical properties, corrosion resistance and biocompatibility. However, under in vivo conditions the implants are subjected to the tribocorrosion phenomenon, which consists in the degradation mechanisms due to the combined effect of wear and corrosion. This process contributes to limiting the life span of the implant and may generate clinical problems in patients as metallic ions are released. Another cause of dental implant failure may be the loosening of the implant as metal does not promote osseointegration.

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41

Bigdeli, Sedigheh. "Developing the third generation of Calphad databases: what can ab-initio contribute?" Doctoral thesis, KTH, Termodynamisk modellering, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-215214.

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Developing the third generation of Calphad databases with more physical basis valid within a wider temperature range is the aim of the present work. Atomistic scale (ab-initio) methods, particularly techniques based on DFT theory, are used for modelling dierent phenomena, so as to gauge the capacity for use in Calphad modelling. Several systems are investigated in this work for studying dierent phenomena, such as magnetism and vibration of atoms. In the case of pure elements (unaries), thermodynamic properties of Mn, Al and C are optimized in the whole temperature range by the help of new mode

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42

Semberg, Pär. "Interactions between iron oxides and the additives olivine, quartzite and calcite in magnetite pellets." Doctoral thesis, Luleå tekniska universitet, Industriell miljö- och processteknik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-16846.

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In the present study, magnetite pellets with the additives olivine, calcite and quartzite were isothermally reduced in a tubular furnace to study the interaction between iron oxides and the additives. Exaggerated amounts of additives were used in order to enable analyses of phases that do not otherwise occur in sufficient amounts for X-ray diffraction and EDS-analyses. The reduction was set to yield either magnetite or wüstite in the temperature range 500-1300ºC. For olivine, reduction tests were also performed to allow metallization in the range 1000-1300ºC. The mineralogical phases which had

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43

Dwari, Ranjan. "Thermal non-coking coal preparation by triboelectric dry process." Licentiate thesis, Luleå, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-16868.

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Coal is the single largest fossil fuel used world-wide and accounts for more than 60% of the total commercial energy consumed. Between 60 to 80% of this coal is used for electric power generation and most of which through a system of pulverised coal combustion. Major portion of the coal used for such power generation is not clean enough to maintain environmental standards. This problem is attributed to high sulphur content in coal used in most of the western countries or ash as is the case in countries like India. In India at present nearly 200 million tonnes per year of coal is used for power

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Strandkvist, Ida. "A Dissolution Study of Common Ferrous Slag Minerals." Licentiate thesis, Luleå tekniska universitet, Mineralteknik och metallurgi, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-60227.

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Slag is a vital part of metal production since it removes impurities from the metal. As slag is continuously produced, the options are either to dispose slag in landfill or acknowledge slag as a product. Slag can be used in many different applications, ranging from fertilizer to construction material; in some cases, the properties of slag make it a superior alternative to virgin stone materials. The properties and thereby the field of application is determined by the mineralogical composition of the slag. Slag is considered an environmentally friendly material as long as the leaching of certai

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45

Yanmin, Wang. "Wet magnetic concentration for weakly magnetic mineral fines and ultrafines." Doctoral thesis, Luleå, 1993. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-26710.

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The first objective of the thesis was to reveal the characteristic magnetic behaviour of natural weakly magnetic minerals (such as hematite and chromite), and the size limits of the particles recoverable by the existing modem high intensity and high gradient magnetic separators. The second objective was to enhance the particle aggregation andlor the magnetic response for wet magnetic concentration of the ultrafines which escaped from the separators. It was observed that weakly magnetic natural minerals (hematite and chromite) exhibited variations in the magnetic behaviour with respect to magne

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46

Ikumapayi, Fatai Kolawole. "Flotation chemistry of complex sulphide ores : recycling of process water and flotation selectivity." Licentiate thesis, Luleå tekniska universitet, Industriell miljö- och processteknik, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-26634.

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Recycling of flotation effluents through the ore processing plant is one of the ways of reducing both plant-operating costs and industrial impact onto the local ecosystem. Such waters named acid mine drainage (AMD), if discharged from sulphide flotation are gypsum (CaSO4.H2O) saturated and have a high salinity (on the order of 1000 ppm). As minor species, they commonly contain reduced sulphur compounds (RSC) (sulfoxyanions with sulphur in the oxidation state below (VI) such as SO32-, S2O32-, S2O52-, and S4O62-), cations of ferrous and non-ferrous metals, frothing molecules, residual chemical r

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47

Engström, Fredrik. "Mineralogical influence of different cooling conditions on leaching behaviour of steelmaking slags." Licentiate thesis, Luleå tekniska universitet, Industriell miljö- och processteknik, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-26246.

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The Swedish steelmaking industry produces large amounts of by-products. In 2006, the total amount of slag produced reached approximately 1 375 000 metric tons, of which 30% was deposited. Due to its strength, durability and chemistry, steel slag is of interest in the field of construction due to it's similarities with ordinary ballast stone. However, some steel slags face an array of quality concerns that might hinder their use. These concerns generally involve the following physical and chemical properties: Volume expansion, Disintegration, Leaching of metals By controlling and modifying proc

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48

Lennartsson, Andreas. "Development of a process model for a Peirce-Smith converter." Licentiate thesis, Luleå tekniska universitet, Industriell miljö- och processteknik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-25755.

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Copper was one of the first metals ever extracted and used by mankind. It is used for its unique properties, like corrosion resistance, good workability, high thermal conductivity and attractive appearance. New mines are opened to maintain a supply of primary feedstock to copper smelters. These new deposits are in many instances found to have a more complex mineralogy with several minor elements. Besides treating primary material, copper smelters also show an increasing interest in treating secondary material, such as copper containing scrap from waste electric and electronic equipment, which

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49

Hu, Xianfeng. "Fundamental Studies on Direct Chromium Alloying by Chromite Ore with Designed Alloying Precursor." Licentiate thesis, Luleå tekniska universitet, Mineralteknik och metallurgi, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-18117.

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Chromium is an important alloying element for stainless steels and other Cr-bearing steels. During the steelmaking process chromium is added to the steels mainly in the form of ferrochrome, which is largely produced by the energy-intensive smelting reduction process of chromite ore in the submerged arc furnace. To reduce the overall energy consumption during the ferrochrome production process and the chromium alloying process, direct chromiumalloying by chromite ore has been proposed. The application of this process will integrate the processes for ferrochrome production and chromium alloying,

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Mwanga, Abdul. "Test Methods for Characterising Ore Comminution Behavior in Geometallurgy." Licentiate thesis, Luleå tekniska universitet, Mineralteknik och metallurgi, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-18689.

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Abstract:

Comminution test methods used within mineral processing have mainly been developed for selecting the most appropriate comminution technology for a given ore, designing a grinding circuit as well as sizing the equipment needed. Existing test methods usually require comparatively large sample amounts and are time-consuming to conduct. This makes comprehensive testing of ore comminution behavior – as required in the geometallurgical context – quite expensive. Currently the main interest in the conduct of comminution test lies in the determination of particle size reduction and related energy cons

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