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Dissertations / Theses on the topic 'Bicrystals'

Author: Grafiati

Published: 4 June 2021

Last updated: 10 February 2022

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1

Xiao, Guanghao. "Grain boundary motion in aluminum bicrystals /." View online version; access limited to Brown University users, 2005. http://wwwlib.umi.com/dissertations/fullcit/3174697.

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2

Evans, Herbert Elgin 1962. "Preparation of high-purity aluminum bicrystals." Thesis, The University of Arizona, 1989. http://hdl.handle.net/10150/277076.

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The preparation of bicrystal specimens of high interfacial purity and accurately controlled mismatch of orientation between grains with a specific boundary orientation are critical for fundamental studies of the structure and properties of grain boundaries. A method was developed for routinely producing high-purity aluminum bicrystals of desired mismatch and boundary orientation. A strain annealing technique was used for making large single crystals. The orientation, structural perfection, and chemical purity of the seeds were characterized, then the seeds were joined by using an electron beam

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3

Miracle, Daniel Brian. "The deformation of nickel aluminide bicrystals /." The Ohio State University, 1990. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487681148542519.

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4

VINOGRADOV, Alexei. "Fatigue Crack Propagation in Copper Single and Bicrystals." Kyoto University, 1997. http://hdl.handle.net/2433/202336.

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5

McAuley, Nigel Anthony. "A study of interfacial defects in hexagonal based bicrystals." Thesis, University of Liverpool, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.235507.

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6

Yao, Zhicong. "Prediction and measurement of active slip in aluminum bicrystals and multicrystals /." The Ohio State University, 1990. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487681788254995.

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7

Kheradmand, Nousha [Verfasser]. "Grain boundary-dislocation interaction: A local investigation via micron-sized bicrystals / Nousha Kheradmand." Aachen : Shaker, 2012. http://d-nb.info/1069044504/34.

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8

Kaneko, Yoshihisa. "Fatigue Crack Propagation and Cyclic Deformation in Ferritic Stainless Steel Single and Bicrystals." Kyoto University, 1998. http://hdl.handle.net/2433/77916.

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9

Liberatore, Michael James. "Secondary-ion mass spectrometric analysis of oxygen-grain boundary diffusion in magnesium-oxide bicrystals." Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/32163.

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10

Wanakamol, Panitarn. "Deformation behavior of cylindrical block copolymer bicrystals : pathway to understanding block copolymer grain boundaries." Thesis, Massachusetts Institute of Technology, 2006. http://hdl.handle.net/1721.1/37582.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 2006.<br>Includes bibliographical references (leaves 166-169).<br>Model bicrystals made by adhering pieces of near-single-crystal styrene-isoprene-styrene (SIS) cylindrical block copolymer (BCP), produced by a roll-casting process; yield various types of pure tilt grain boundaries. The study of the deformation of the bicrystals, each containing one grain boundary, enables a deeper understanding of the influences grain boundaries and the incompatibilities between them have on mechanical behavior.

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11

Yasuda, Mitsuhiro. "Pitting corrosion and intergranular corrosion of Al and Al-Cu alloy single crystals and bicrystals." Thesis, University of British Columbia, 1988. http://hdl.handle.net/2429/29221.

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Single crystals and bicrystals have been used to study pitting corrosion and intergranular corrosion of Al and Al-Cu alloys in 0.5M NaCl solution. The critical pitting potential and pit density were examined as a function of a number of factors. These included crystallographic orientation; the bulk solution chemistry including CI- concentration, NO₃- addition and pH; the effect of Cu alloying; and the effects of homogenizing and aging on the alloy crystals. The susceptibility for pitting corrosion was found to depend on crystallographic orientation in pure Al with {111} showing maximum pitti

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12

Kheradmand, Nousha [Verfasser], and Horst [Akademischer Betreuer] Vehoff. "Grain boundary-dislocation interaction: a local investigation via micron-sized bicrystals / Nousha Kheradmand. Betreuer: Horst Vehoff." Saarbrücken : Saarländische Universitäts- und Landesbibliothek, 2012. http://d-nb.info/105233962X/34.

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13

Brandenburg, Jann-Erik Verfasser], Dmitri A. [Akademischer Betreuer] [Molodov, and Luis Antonio [Akademischer Betreuer] Barrales-Mora. "In situ investigation of grain boundary migration in aluminium and copper bicrystals / Jann-Erik Brandenburg ; Dmitri Molodov, Luis Antonio Barrales-Mora." Aachen : Universitätsbibliothek der RWTH Aachen, 2018. http://d-nb.info/1187346640/34.

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14

Brandenburg, Jann-Erik [Verfasser], Dmitri A. [Akademischer Betreuer] Molodov, and Luis Antonio [Akademischer Betreuer] Barrales-Mora. "In situ investigation of grain boundary migration in aluminium and copper bicrystals / Jann-Erik Brandenburg ; Dmitri Molodov, Luis Antonio Barrales-Mora." Aachen : Universitätsbibliothek der RWTH Aachen, 2018. http://d-nb.info/1187346640/34.

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15

Bringuier, Stefan. "Mechanical Properties of Symmetric Tilt Grain Boundaries in Silicon and Silicon Carbide: A Molecular Dynamics Study." Diss., The University of Arizona, 2015. http://hdl.handle.net/10150/560748.

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The mechanical properties of polycrystalline materials are governed by the underlying microstructure. In this context, in this dissertation, the role of grain boundaries on the mechanical response of two technologically important materials namely silicon and silicon carbide are examined. In particular, the dynamics of silicon carbide and silicon symmetric tilt bicrystals under shear load are characterized via molecular dynamics simulations. Cubic silicon carbide bicrystals with low-angle grain boundaries exhibit stick-slip behavior due to athermal climb of edge dislocations along the grain bou

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16

Nguyen, Tue. "Molecular dynamics study of thermal disorder in a bicrystal model." Thesis, Massachusetts Institute of Technology, 1988. http://hdl.handle.net/1721.1/14485.

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17

John, Daniel. "Electric transport measurements of thin film high-Tc superconductor bicrystal grain boundary Josephson junctions." Thesis, Loughborough University, 2014. https://dspace.lboro.ac.uk/2134/14966.

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Josephson junctions are an integral component of superconducting electronics because of their non-linear response and have not only been incorporated into a number of devices including superconducting quantum interference devices (SQUIDs) to create highly sensitive magnetometers and Josephson flux vortex transistors (JVFTs) to make fast-switching, high gain transistors but also into experiments to resolve the unexplained pairing mechanisms in high-Tc superconductors. As such, chapter 2 describes the results of an investigation into the pairing mechanism of the infinite layer superconductor Sr1

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18

Benhroma, Hadj-Aïssa. "Observation par microscopie électronique en transmission et par topographie aux rayons x des dislocations d'interface mobiles dans un bicristal sigma=9 de silicium." Vandoeuvre-les-Nancy, INPL, 1992. http://www.theses.fr/1992INPL003N.

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Le but de la thèse est l'étude de la mobilité de dislocations d'interface mobile dans un joint sigma=9 (rotation de 38,94, axe 011, plan 122) de silicium. Le vecteur de Burgers de ces dislocations appartient au réseau d. S. C. Du joint sigma=9. Le déplacement de dislocations bg=1/18 411 glissiles dans le plan de joint a été observé par met in situ et par topographie aux rayons x: il est très anisotrope. Les segments alignés suivant l'axe commun sont rigides et lents, alors que des segments vis sont souples et rapides. La mobilité de ceux-ci a été mesurée entre t=550c et t=750c, pour des contra

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19

Rhead, Stephen David. "An X-ray bicrystal truncation rod study of a si Σ13 symmetric tilt grain boundary and design and commissioning of a holography endstation at beamline I06". Thesis, University of Leicester, 2011. http://hdl.handle.net/2381/10066.

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Naturally occurring grain boundary interfaces greatly influence important characteristics of many materials including their mechanical, electrical and magnetic properties. The atomic structure of such grain boundaries, while crucial to their behaviour, are inaccessible to most experimental techniques as they are internal to the material. Theoretical studies are complicated by the existence of multiple structures for a given grain boundary. Data from an X-ray diffraction experiment is presented, along with the model used for simulated scattering from Keating energy minimised grain boundary stru

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20

AMARRAY, ELHOUSSINE. "Effet getter dans le silicium poly- et bicristallin : interaction de l'or et de l'oxygene avec les impuretes metalliques." Université Louis Pasteur (Strasbourg) (1971-2008), 1986. http://www.theses.fr/1986STR13068.

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Etude de l'effet getter au voisinage des surfaces de silicium bicristallin. Caracterisation des especes segregees a la surface par spectrometrie electronique auger permettant de connaitre les concentrations atomiques et les liaisons chimiques existant entre atomes. Analyse des trois facteurs principaux d'effet getter: role d'une couche d'oxyde; role des recuits thermiques, role d'une impurete a grande diffusivite, l'or

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21

Heiser, Thomas. "Developpement d'une technique d'analyse localisee des defauts electriquement actifs dans les semiconducteurs." Université Louis Pasteur (Strasbourg) (1971-2008), 1988. http://www.theses.fr/1988STR13136.

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Methode basee sur l'emission thermique de porteurs electriques pieges par les niveaux profonds dans la bande interdite. La modelisation de la technique a permis de determiner l'influence des divers parametres physiques sur la resolution spatiale de la technique et d'etablir les conditions optimales de mesures. L'exploitation numerisee des signaux augmente sensiblement la capacite de detection de la technique. Le phenomene de "gettering" de l'or par les dislocations ainsi que la diffusion acceleree de l'or a travers le joint de grain d'un bicristal de silicium ont ete mis en evidence

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22

Ihlal, Ahmed. "Analyses quantitatives par sem/ebic des defauts recombinants dans les semiconducteurs polycristallins : influence des traitements thermiques sur l'activite electrique des bicristaux de silicium." Caen, 1988. http://www.theses.fr/1988CAEN2007.

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Etude quantitative , par la methode ebic, de la recombinaison des porteurs minoritaires dans des bicristaux de silicium en fonction des traitements thermiques, entre 450 et 950**(o)c. Un developpement des phenomenes physiques regissant la creation de differentes theories conduisant au traitement quantitatif du signal ebic est presente. Selon le traitement thermique, le contraste des deux types de joints de grains evolue avec la temperature: vitese de recombinaison et longueur de diffusion varient avec la temperature de recuit

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23

Theyssier, Marie-Christine. "Compression plane à chaud de cristaux d'aluminium et d'aluminium-magnésium : de la déformation à chaud à la recristallisation." Grenoble INPG, 1996. http://www.theses.fr/1996INPG4209.

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L'anisotropie des proprietes des toles d'aluminium est fonction des textures et microstructures developpees pendant les differentes etapes de la mise en forme. Pour simuler le laminage a chaud, nous avons deforme en compression plane biencastree a chaud (200ct00c, 0. 1. 5, 10#-#3s#-#10#-#1s#-#1) des cristaux d'al et d'al-1%mg (monocristaux, bicristaux et polycristaux). La texture de deformation a 400c de polycristaux d'al est de type l et celle obtenue pour al-1%mg est a dominante c/s. La deformation non imposee #d#l, #d#t des monocristaux d'orientation l d'al a 400c est inferieure a celle obt

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24

Hamet, Jean-François. "Etude de bicristaux de silicium par spectroscopie capacitive, influence des traitementsthermiques et des impuretes." Caen, 1989. http://www.theses.fr/1989CAEN2001.

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Etude des proprietes electriques des joints de grain par dlts, tscap et egalement par des mesures de recombinaison ebic. L'activite electrique des joints est liee a la presence de precipites a caractere metallique le long des joints

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25

Field, Michael B. "Electromagnetic properties of melt-textured YBa₂Cu₃O₆₊x bicrystals of general misorientation." 1996. http://catalog.hathitrust.org/api/volumes/oclc/36958861.html.

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Thesis (Ph. D.)--University of Wisconsin--Madison, 1996.<br>Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 148-158).

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26

Hsueh, Chin-Ting, and 薛至廷. "On the friction influenced zone of pure aluminum bicrystals using plane strain compression." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/46200566248123431026.

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碩士<br>國立成功大學<br>材料科學及工程學系碩博士班<br>94<br>During the deformation, the influence of grain boundaries plays a less role than that of the intrinsic effects, such as texture, and the extrinsic effects, such as friction. In order to investigate systematically the deformation behavior, the influence of the intrinsic and extrinsic effects should be conducted. The influence of texture had been studied. Therefore, the effect of friction will be investigated in the study. In the study, aluminum bi-crystals were used to investigate the effect of friction under plane strain compression. In order to avoid

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27

"Kinetics of Void Nucleation and Growth at Grain Boundaries on Shock Loaded Copper Bicrystals." Doctoral diss., 2020. http://hdl.handle.net/2286/R.I.57084.

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abstract: Shock loading produces a compressive stress pulse with steep gradients in density, temperature, and pressure that are also often modeled as discontinuities. When a material is subject to these dynamic (shock) loading conditions, fracture and deformation patterns due to spall damage can arise. Spallation is a dynamic material failure that is caused by the nucleation, growth, and coalescence of voids, with possible ejection of the surface of the material. Intrinsic defects, such as grain boundaries are the preferred initiation sites of spall damage in high purity materials. The focus o

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28

Wang, Jyh-Lih. "Study of current limiting mechanisms in Bi-Sr-Ca-Cu-O superconducting tapes by electromagnetic and microstructural characterization of bulk scale bicrystals." 1996. http://catalog.hathitrust.org/api/volumes/oclc/35677796.html.

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29

Tsu, I.-Fei. "Grain boundary topography and dislocation network structure of [001] tilt bicrystals of YBa₂Cu₃O₇-d and Bi₂Sr₂CaCu₂O₈₊x superconductors." 1996. http://catalog.hathitrust.org/api/volumes/oclc/36475696.html.

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30

Yu, Hsiao-Wen, and 尤孝雯. "Characterization of Grain Boundaries in YBa2Cu3Oy Bicrystal Junctions." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/73111739487312094090.

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博士<br>國立臺灣大學<br>物理學研究所<br>88<br>A systematical study of the relation between the transport and structure property of YBa2Cu3Oy (YBCO) grain boundaries (GBs) has been performed. Using the atomic force microscope (AFM), the island growth mechanism of the YBCO film is found to be responsible for the common meandering characteristic observed in the GB. Besides, the strikingly wandering of the GB is related to the defects embedded in the bicrystal fusion bicrystal substrate detected by the optical microscope. The spatial properties of the GB are correlated to the film properties, film gr

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31

Yurtalan, Muhammet Ali. "High Temperature DC SQUID Fabrication on Bicrystal YBCO Thin Films." Thesis, 2012. http://hdl.handle.net/10012/6653.

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After the discovery of high temperature superconductors, different types of Josephson junctions were investigated and thus a new path is created to obtain high temperature superconducting quantum interface devices(SQUID). However fabrication of high temperature superconductors is a challenging concept. It is desired that the fabrication methods yield to high reproducibility and sensitive devices. Currently, SQUIDs are mostly realized by using bicrystal thin films and by making ramp edge junctions. In this study, nano scale fabrication of YBa₂Cu₃O₇ (YBCO) thin films on bicrystal SrTiO₃ (STO) su

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32

Hou, Jun Liang, and 侯俊良. "Transport properties of Bicrystal YBCO Superconducting thin film Grain boundary." Thesis, 1995. http://ndltd.ncl.edu.tw/handle/33362399656769263307.

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碩士<br>國立交通大學<br>電子物理學系<br>83<br>The transport properties of the bicrystalline YBCO supercounducting thin film grain boundary deposited on SrTiO3 bicrystal substrate with misorientation angle 36.8 by laser ablation have been investigated systematically. We have manifested that these samples behave as a near-ideal resistivity-shunted junction (RSJ) with the aid of analysis of our experimental observation. For example, the temperature dependence of resistivity can be interpreted in terms of th

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33

Huang, Po-Wei, and 黃柏維. "Fabrication and properties of HTS-SQUID on Bicrystal substrate by RF sputter system." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/70082565538694153900.

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碩士<br>國立中興大學<br>物理學系所<br>100<br>From past literature we know superconductor quantum interference device (SQUID) is the most sensitive to detect magnetic field in the world. It can be use as a voltage-flux transfer device. Here we grow high temperature superconductor YBa2Cu3O7-x thin film on bicrystal substrate by magnetron sputter system, and use photolithography, ion milling, and wet etching to fabricate our SQUID.After that we measure R-T, I-V and V-T data at 77 K. Finally, a flux noise of approximately 10μΦ0/Hz1/2 and 14μΦ0/Hz1/2at 77 K at 1kHz has been archived, from which calculate the m

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34

Chien-Hung, Liu. "Dynamic Investigation of Au Nanostructures on Silicon Bicrystal by In Situ Ultrahigh Vacuum Transmission Electron Microscope." 2006. http://www.cetd.com.tw/ec/thesisdetail.aspx?etdun=U0016-0109200613402301.

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35

Chien-Hung, Liu, and 劉建宏. "Dynamic Investigation of Au Nanostructures on Silicon Bicrystal by In Situ Ultrahigh Vacuum Transmission Electron Microscope." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/37564354711096870670.

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博士<br>國立清華大學<br>材料科學工程學系<br>94<br>Formation of Au nanoparticles on Si bicrystal has been investigated by transmission electron microscopy. The Au nanoparticles were found to form preferentially at the node points of the dislocation network to relieve the strains induced by the dislocations. Surface strain field of substrate with smaller dislocation spacing provides higher particle distribution density and better size uniformity. After annealing at 150 °C, the Au nanoparticles were found to be confined by the dislocation grids. Upon further annealing at 250 °C, small nanoparticles shrank in fav

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36

Redwing, Ronald Dean. "Observation of strong to Josephson coupled transition in 10 ̊low angle [001] tilt YBa₂Cu₃Ox bicrystal junctions." 1998. http://catalog.hathitrust.org/api/volumes/oclc/42870762.html.

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