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Relevant bibliographies by topics / Mechanical impurities / Dissertations / Theses

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Dissertations / Theses on the topic 'Mechanical impurities'

Author: Grafiati

Published: 28 May 2022

Last updated: 31 July 2025

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1

Jensen, Mallory Ann. "Detecting and gettering chromium impurities in photovoltaic crystalline silicon." Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/100122.

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Thesis: S.M., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2015.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 61-67).<br>Photovoltaic (PV) modules provide a source of renewable electricity by harnessing solar energy. Currently, crystalline silicon dominates the PV market with an approximate market share of 90% and record solar cell efficiencies greater than 20%. However, the PV market must decrease the cost to the consumer to maintain growth and meet global electricity demands. Increasing the solar-to-electricity convers

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2

Morishige, Ashley E. (Ashley Elizabeth). "Metal impurities in n-type crystalline silicon for photovoltaics : simulation, synchrotron-based characterization, and mitigation." Thesis, Massachusetts Institute of Technology, 2016. http://hdl.handle.net/1721.1/104131.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2016.<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Cataloged from student-submitted PDF version of thesis.<br>Includes bibliographical references (pages 193-211).<br>Crystalline silicon is the dominant technology in the rapidly-growing photovoltaics (PV) industry, but significant cost reduction is still required before widespread grid parity is achieved. One-quarter of the cost of a PV module is

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3

Milovich, F. O., N. Y. Tabachkova, V. T. Bublik, et al. "The Influence of Stabilizing Impurities and Annealing on the Structure and Mechanical Properties of Partially Stabilized Zirconia." Thesis, Sumy State University, 2012. http://essuir.sumdu.edu.ua/handle/123456789/35071.

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The phase composition and evolution of the twin structure of PSZ crystals, depending of the concentration stabilizing impurities have been investigated by X-ray diffraction and transmission electron microscopy. The measurements of hardness and fracture toughness by microindentation have been carried out. In work is shown that the high mechanical characteristics of PSZ crystals are related to features of their phase composition and structure, namely the degree of tetragonality the phase and the presence of domains ranging in size from tens to hundreds of nanometers. When you are citing the

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4

Orovets, Christine M. "Search for Resonant Impurities in Bismuth and Bismuth-Antimony Alloys: Lithium, Magnesium, and Sodium." The Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1337715464.

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5

Паккі, Г. В., та Л. М. Ульєв. "Фільтрування закручених потоків рідини від механічних домішок". Thesis, Видавництво СумДУ, 2010. http://essuir.sumdu.edu.ua/handle/123456789/13342.

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6

Chatelain, Marc. "Modélisation des phénomènes de transport solutal et étude d’un dispositif de brassage pour la purification du silicium photovoltaïque." Thesis, Lyon, 2016. http://www.theses.fr/2016LYSEI105/document.

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Cette étude s’intéresse à la modélisation de la ségrégation des impuretés lors des procédés de solidification dirigée du silicium pour l’industrie photovoltaïque. Il s’agit d’un problème multi-physiques et multi-échelles qui nécessite des modèles efficaces pour pouvoir traiter des configurations industrielles en 3D. La première partie de l’étude porte sur le développement de fonctions de paroi solutales dans le but d’estimer la ségrégation sans résoudre numériquement la couche limite solutale. Un modèle analytique est alors utilisé pour estimer le paramètre convecto-diffusif à partir de la con

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7

Bouzidi, Nedjima. "Influence des impuretés des kaolins sur les propriétés des produits de cuisson." Phd thesis, Ecole Nationale Supérieure des Mines de Saint-Etienne, 2012. http://tel.archives-ouvertes.fr/tel-00847400.

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Ce travail concerne l'étude de l'effet des impuretés sur les phénomènes physico-chimiques apparaissant durant le frittage des kaolins entre 900 et 1600 °C et les propriétés physiques qui en découlent. Le kaolin est utilisé dans le domaine des céramiques : céramique traditionnelle, porcelaine, céramiques réfractaires (mullite, chamotte), porcelaines électrotechniques, etc... Il est d'usage de contrôler la teneur et la nature des impuretés car leur présence peut limiter leurs applications.Sept kaolins ont été choisis pour les impuretés qu'ils contiennent à savoir ;* Feldspaths, quartz et oxydes

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8

El, Ghani Nouhayla. "Modélisation expérimentale du transfert de masse en croissance cristalline par des méthodes électrochimiques en présence d'ultrasons." Thesis, Lyon, 2020. http://www.theses.fr/2020LYSEI037.

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Le brassage acoustique présente une alternative prometteuse pour l'amélioration des procédés de purification pendant la solidification du silicium photovoltaïque. Dans cette étude, on s'intéresse à la caractérisation de l'efficacité d'un brassage par acoustic streaming pour favoriser le phénomène de ségrégation. Nous avons ainsi développé une approche expérimentale originale basée sur des démonstrateurs en eau des phénomènes présents lors de la solidification. Cette démarche s'appuie sur une analogie entre d'une part la diffusion solutale des impuretés à travers la couche limite, au niveau du

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9

Ferreira, Antonio Cesar. "CORRECAO DO POTENCIAL MUFFIN-TIN: ANTISITIO EM GaAs." Universidade de São Paulo, 1990. http://www.teses.usp.br/teses/disponiveis/43/43133/tde-08062015-155921/.

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Devido à inconfiabilidade do modelo EM-X?, no cálculo da energia total, consideramos uma correção na densidade de carga \"muffin-tin\". Com esta correção podemos ajustar a energia total, a partir de parâmetros definidos na teoria. O objetivo deste trabalho é o estudo da curva da energia total associada ao estado excitado do sistema GaAs: AsGa, quando o átomo substitucional de As se desloca na direção . Partindo de cálculos de primeiros princípios (LARGE UNIT CELL APPROACH), reproduzimos a curva da energia total do estado fundamental. A partir dos parâmetros encontrados na correção não \"muffin

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10

"ROLE OF IMPURITIES ON DEFORMATION OF HCP CRYSTAL: A MULTISCALE APPROACH." Doctoral diss., 2014. http://hdl.handle.net/2286/R.I.27423.

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abstract: Commercially pure (CP) and extra low interstitial (ELI) grade Ti-alloys present excellent corrosion resistance, lightweight, and formability making them attractive materials for expanded use in transportation and medical applications. However, the strength and toughness of CP titanium are affected by relatively small variations in their impurity/solute content (IC), e.g., O, Al, and V. This increase in strength is due to the fact that the solute either increases the critical stress required for the prismatic slip systems ({10-10}<1-210>) or activates another slip system ((0001)<11-20

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11

Kannuchamy, Vasanth Kumar. "Transfer of impurities into crystals in industrial processes : mechanics and kinetics." Master's thesis, 2010. http://hdl.handle.net/10216/61311.

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Kannuchamy, Vasanth Kumar. "Transfer of impurities into crystals in industrial processes : mechanics and kinetics." Dissertação, 2010. http://hdl.handle.net/10216/61311.

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13

Huzayyin, Ahmed. "Effect of Chemical Impurities on the Solid State Physics of Polyethylene." Thesis, 2011. http://hdl.handle.net/1807/31787.

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Computational quantum mechanics in the frame work of density functional theory (DFT) was used to investigate the effect of chemical impurities on high field conduction in polyethylene (PE). The impurity states in the band gap caused by common chemical impurities were characterized in terms of their “depth”, i.e. energy relative to their relevant band edge (valence band or conduction band), and in terms of the extent to which their wavefunctions were localized to a single polymer chain or extended across chains. It was found that impurity states can affect high field phenomena by providing “tra

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14

(10703055), Guodong Jiang. "INTERPLAY OF GEOMETRY WITH IMPURITIES AND DEFECTS IN TOPOLOGICAL STATES OF MATTER." Thesis, 2021.

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The discovery of topological quantum states of matter has required physicists to look beyond Landau’s theory of symmetry-breaking, previously the main paradigm for<br>studying states of matter. This has led also to the development of new topological theories for describing the novel properties. In this dissertation an investigation in this<br>frontier research area is presented, which looks at the interplay between the quantum geometry of these states, defects and disorder. After a brief introduction to the topological quantum states of matter considered herein, some aspects of my work in this

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15

Chen, Antony Szu-Han. "Experiments on the Growth and Form of Icicles." Thesis, 2014. http://hdl.handle.net/1807/44105.

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Icicles are a ubiquitous and picturesque feature of cold winter weather. Their familiar form emerges from a subtle interplay between the solidification dynamics of ice and the gravity-driven flow of the thin water film flowing over their evolving surface. The latent heat released by freezing is advected by the water film and ultimately carried away by the surrounding sub-zero air, which is also flowing. Like many processes far from equilibrium, icicle growth can exhibit nonlinear pattern formation. While scaling theory predicts that icicles converge to `platonic', self-similar shapes, natu

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