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Contribution A Lelaboration Et A Loptimisation Dalliages Magnetiques Permanents Sm Co Cu Fe
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Book Synopsis CONTRIBUTION A L'ELABORATION ET A L'OPTIMISATION D'ALLIAGES MAGNETIQUES PERMANENTS SM-CO-CU-FE by : LAURENT.. CATALDO
Download or read book CONTRIBUTION A L'ELABORATION ET A L'OPTIMISATION D'ALLIAGES MAGNETIQUES PERMANENTS SM-CO-CU-FE written by LAURENT.. CATALDO and published by . This book was released on 1996 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt: L'ETUDE CONCERNE L'ELABORATION D'ALLIAGES SM-CO-FE-CU-ZR UTILISES POUR LA FABRICATION D'AIMANTS PERMANENTS. L'OBJECTIF POURSUIVI A ETE UNE OPTIMISATION DES PROPRIETES MAGNETIQUES A TRAVERS LA MISE AU POINT DES CONDITIONS D'ELABORATION. LES AIMANTS PERMANENTS A BASE DE CO-SM-CU-FE ET ZR SONT ENCORE ACTUELLEMENT LES SEULS MATERIAUX SUSCEPTIBLES DE TRAVAILLER A HAUTE TEMPERATURE (300\C) SANS ALTERATION NOTABLE DE LEURS PROPRIETES MAGNETIQUES (TEMPERATURE DE CURIE, COERCITIVITE ELEVEE, PRODUIT ENERGETIQUE 28MGOE). LE PROCESSUS D'ELABORATION DE CES ALLIAGES EST COMPLEXE ET COMPORTE TROIS ETAPES : UNE ETAPE D'HOMOGENEISATION A HAUTE TEMPERATURE DESTINEE A OBTENIR UN MATERIAU MONOPHASE, UN RECUIT A BASSE TEMPERATURE AU COURS DUQUEL SE FORME LA MICROSTRUCTURE CELLULAIRE RESPONSABLE DES BONNES PROPRIETES MAGNETIQUES DE CES ALLIAGES, UN DURCISSEMENT MAGNETIQUE PRODUIT PAR UN REFROIDISSEMENT LENT. L'OBJECTIF DU TRAVAIL A ETE DE DEFINIR LES LIMITES DES DOMAINES MONOPHASES DES PHASES CONSTITUTIVES DE CES AIMANTS. CES DEUX PHASES DERIVENT DES COMPOSES SM 2CO 1 7 ET SMCO 5. LA SUBSTITUTION PAR CU, FE ET ZR CONDUIT A DES COMPOSES DE TYPE 2:17 RHOMBOEDRIQUES OU HEXAGONAUX SUIVANT QUE LA PHASE EST ISSUE DE SM 2CO 1 7 OU SMCO 5. EN RAISON DU MANQUE DE DONNEES COHERENTES DE LA LITTERATURE, UNE ETUDE SYSTEMATIQUE DES SOUS SYSTEMES LIMITES DU SYSTEME QUINAIRE CO-SM-CU-FE-ZR A ETE ENTREPRISE. SYSTEME BINAIRE CO-SM DANS LE DOMAINE RICHE EN COBALT : IL A ETE MIS EN EVIDENCE QUE DANS CE SYSTEME IL EXISTE UNE SOLUBILITE IMPORTANTE VERS 1370\C DU SAMARIUM DANS LE COBALT. LES DIFFERENTES PHASES EXISTANT DANS LE DOMAINE RICHE EN COBALT (SM 2CO 1 7, SMCO 5, SM 5CO 1 9, SM 2CO 7) ONT ETE ETUDIEES DU POINT DE VUE DE LEUR PROPRIETES PHYSICOCHIMIQUES (FUSION, REACTION DE FORMATION, SPECTRE DE DIFFRACTION DE RX, STOECHIOMETRIE). SYSTEMES TERNAIRE CO-SM-CU ET QUATERNAIRE CO-SM-CU-FE : LES DOMAINES MONOPHASES DES PHASES 2:17 RHOMBOEDRIQUE ET 1:5 ONT ETE DETERMINES EN COMPOSITION ET EN TEMPERATURE. SYSTEME QUINAIRE CO-SM-CU-FE-ZR : A LA STOECHIOMETRIE 2:17 CORRESPONDENT DEUX FORMES CRISTALLINES, L'UNE RHOMBOEDRIQUE, L'AUTRE HEXAGONALE ISSUE DE LA PHASE 1:5 A TRAVERS UNE PHASE DESORDONNEE 1:7. DES ECHANTILLONS QUINAIRES ONT ETE ELABORES A 1150\C, LE DOMAINE MONOPHASE 1:5/1:7/2:17H A ETE DELIMITE POUR UNE TENEUR EN CUIVRE EGALE A 4 AT%, ET LES PHASES ADJACENTES SUSCEPTIBLES D'ETRE OBSERVEES DANS DES MATERIAUX EN FONCTION D'UNE MODIFICATION DE COMPOSITION ONT ETE DEFINIES. L'ETUDE A ETE COMPLETEE PAR LA RECHERCHE DE L'EVOLUTION DES MATERIAUX LORS DE L'ETAPE DE RECUIT BASSE TEMPERATURE. DANS CETTE ETUDE, LES MATERIAUX ONT ETE ELABORES PAR FUSION AU FOUR A ARC ET RECUITS SOUS ATMOSPHERE D'ARGON PURIFIE. LA COMPOSITION NOMINALE DES ECHANTILLONS A ETE DETERMINEE PAR SPECTROMETRIE D'EMISSION PLASMA. LES PHASES ONT ETE CARACTERISEES PAR DIFFRACTION DE RX, EXAMEN METALLOGRAPHIQUE ET LEUR COMPOSITION A ETE ANALYSEE PAR MICROSONDE. UNE ANALYSE PAR MOSSBAUER A PERMIS DE SITUER LES SITES SUBSTITUES PAR LE FER DANS LES PHASES 2:17R ET 1:5.
Download or read book ICREEC 2019 written by Ahmed Belasri and published by Springer Nature. This book was released on 2020-06-10 with total page 659 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights peer reviewed articles from the 1st International Conference on Renewable Energy and Energy Conversion, ICREEC 2019, held at Oran in Algeria. It presents recent advances, brings together researchers and professionals in the area and presents a platform to exchange ideas and establish opportunities for a sustainable future. Topics covered in this proceedings, but not limited to, are photovoltaic systems, bioenergy, laser and plasma technology, fluid and flow for energy, software for energy and impact of energy on the environment.
Book Synopsis Flexoelectricity in Liquid Crystals by : Agnes Buka
Download or read book Flexoelectricity in Liquid Crystals written by Agnes Buka and published by World Scientific. This book was released on 2013 with total page 299 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book intends to give a state-of-the-art overview of flexoelectricity, a linear physical coupling between mechanical (orientational) deformations and electric polarization, which is specific to systems with orientational order, such as liquid crystals. Chapters written by experts in the field shed light on theoretical as well as experimental aspects of research carried out since the discovery of flexoelectricity. Besides a common macroscopic (continuum) description the microscopic theory of flexoelectricity is also addressed. Electro-optic effects due to or modified by flexoelectricity as well as various (direct and indirect) measurement methods are discussed. Special emphasis is given to the role of flexoelectricity in pattern-forming instabilities. While the main focus of the book lies in flexoelectricity in nematic liquid crystals, peculiarities of other mesophases (bent-core systems, cholesterics, and smectics) are also reviewed. Flexoelectricity has relevance to biological (living) systems and can also offer possibilities for technical applications. The basics of these two interdisciplinary fields are also summarized.
Download or read book Power Reactor Technology written by and published by . This book was released on 1957 with total page 586 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Carbon Alloys written by E. Yasuda and published by Elsevier. This book was released on 2003-03-05 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt: In recent years the Japanese have funded a comprehensive study of carbon materials which incorporate other elements including boron, nitrogen and fluorine, hence the title of the project "Carbon Alloys". Coined in 1992, the phrase "Carbon Alloys" can be applied to those materials mainly composed of carbon materials in multi-component systems. The carbon atoms of each component have a physical and/or chemical interactive relationship with other atoms or compounds. The carbon atoms of the components may have different hybrid bonding orbitals to create quite different carbon components. Eiichi Yasuda and his team consider the definition of Carbon Alloys, present the results of the Carbon Alloys projects, describe typical Carbon Alloys and their uses, discuss recent techniques for their characterization, and finally, illustrate potential applications and future developments for Carbon Alloy science. The book contains over thirty chapters on these studies from as many researchers. The most modern of techniques, particularly in the area of spectroscopy, were used as diagnostic tools, and many of these are applicable to pure carbons also. Porosity in carbons received considerable attention.
Book Synopsis Neutron Data Booklet by : A. J. Dianoux
Download or read book Neutron Data Booklet written by A. J. Dianoux and published by Old City Pub Incorporated. This book was released on 2003-01-01 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Nonlinear Optical Materials by : Jerome V. Moloney
Download or read book Nonlinear Optical Materials written by Jerome V. Moloney and published by Springer Science & Business Media. This book was released on 1998-08-13 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mathematical methods play a significant role in the rapidly growing field of nonlinear optical materials. This volume discusses a number of successful or promising contributions. The overall theme of this volume is twofold: (1) the challenges faced in computing and optimizing nonlinear optical material properties; and (2) the exploitation of these properties in important areas of application. These include the design of optical amplifiers and lasers, as well as novel optical switches. Research topics in this volume include how to exploit the magnetooptic effect, how to work with the nonlinear optical response of materials, how to predict laser-induced breakdown in efficient optical devices, and how to handle electron cloud distortion in femtosecond processes.
Author :Atomic Energy of Canada Limited Publisher :McGill-Queen's Press - MQUP ISBN 13 :9780773516014 Total Pages :466 pages Book Rating :4.5/5 (16 download)
Book Synopsis Canada Enters the Nuclear Age by : Atomic Energy of Canada Limited
Download or read book Canada Enters the Nuclear Age written by Atomic Energy of Canada Limited and published by McGill-Queen's Press - MQUP. This book was released on 1997 with total page 466 pages. Available in PDF, EPUB and Kindle. Book excerpt: The nuclear energy company has overseen the production of its own history, focusing on programs at its laboratories in Chalk River, Ontario, and Whiteshell, Manitoba between 1943 and 1985. The 16 scientists who wrote the narrative discuss the organization and operations of the laboratories, nuclear safety and radiation protection, radioisotopes, basic research, developing the CANDU reactor, managing the radioactive wastes, business development, and revenue generation. Canadian card order number: C97-900188-9. Annotation copyrighted by Book News, Inc., Portland, OR
Book Synopsis Time Machine Tales by : Paul J. Nahin
Download or read book Time Machine Tales written by Paul J. Nahin and published by Springer. This book was released on 2016-12-24 with total page 423 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains a broad overview of time travel in science fiction, along with a detailed examination of the philosophical implications of time travel. The emphasis of this book is now on the philosophical and on science fiction, rather than on physics, as in the author's earlier books on the subject. In that spirit there are, for example, no Tech Notes filled with algebra, integrals, and differential equations, as there are in the first and second editions of TIME MACHINES. Writing about time travel is, today, a respectable business. It hasn’t always been so. After all, time travel, prima facie, appears to violate a fundamental law of nature; every effect has a cause, with the cause occurring before the effect. Time travel to the past, however, seems to allow, indeed to demand, backwards causation, with an effect (the time traveler emerging into the past as he exits from his time machine) occurring before its cause (the time traveler pushing the start button on his machine’s control panel to start his trip backward through time). Time Machine Tales includes new discussions of the advances by physicists and philosophers that have appeared since the publication of TIME MACHINES in 1999, examples of which are the chapters on time travel paradoxes. Those chapters have been brought up-to-date with the latest philosophical thinking on the paradoxes.
Book Synopsis Universal Themes of Bose-Einstein Condensation by : Nick P. Proukakis
Download or read book Universal Themes of Bose-Einstein Condensation written by Nick P. Proukakis and published by Cambridge University Press. This book was released on 2017-04-27 with total page 663 pages. Available in PDF, EPUB and Kindle. Book excerpt: Covering general theoretical concepts and the research to date, this book demonstrates that Bose-Einstein condensation is a truly universal phenomenon.
Download or read book Quantum Measurement written by Paul Busch and published by Springer. This book was released on 2016-08-23 with total page 544 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is a book about the Hilbert space formulation of quantum mechanics and its measurement theory. It contains a synopsis of what became of the Mathematical Foundations of Quantum Mechanics since von Neumann’s classic treatise with this title. Fundamental non-classical features of quantum mechanics—indeterminacy and incompatibility of observables, unavoidable measurement disturbance, entanglement, nonlocality—are explicated and analysed using the tools of operational quantum theory. The book is divided into four parts: 1. Mathematics provides a systematic exposition of the Hilbert space and operator theoretic tools and relevant measure and integration theory leading to the Naimark and Stinespring dilation theorems; 2. Elements develops the basic concepts of quantum mechanics and measurement theory with a focus on the notion of approximate joint measurability; 3. Realisations offers in-depth studies of the fundamental observables of quantum mechanics and some of their measurement implementations; and 4. Foundations discusses a selection of foundational topics (quantum-classical contrast, Bell nonlocality, measurement limitations, measurement problem, operational axioms) from a measurement theoretic perspective. The book is addressed to physicists, mathematicians and philosophers of physics with an interest in the mathematical and conceptual foundations of quantum physics, specifically from the perspective of measurement theory.
Book Synopsis Forest Fire Research by : Universidade de Coimbra
Download or read book Forest Fire Research written by Universidade de Coimbra and published by . This book was released on 2010 with total page 355 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Precision Cosmology by : Bernard J. T. Jones
Download or read book Precision Cosmology written by Bernard J. T. Jones and published by Cambridge University Press. This book was released on 2017-04-20 with total page 1166 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cosmology seeks to characterise our Universe in terms of models based on well-understood and tested physics. Today we know our Universe with a precision that once would have been unthinkable. This book develops the entire mathematical, physical and statistical framework within which this has been achieved. It tells the story of how we arrive at our profound conclusions, starting from the early twentieth century and following developments up to the latest data analysis of big astronomical datasets. It provides an enlightening description of the mathematical, physical and statistical basis for understanding and interpreting the results of key space- and ground-based data. Subjects covered include general relativity, cosmological models, the inhomogeneous Universe, physics of the cosmic background radiation, and methods and results of data analysis. Extensive online supplementary notes, exercises, teaching materials, and exercises in Python make this the perfect companion for researchers, teachers and students in physics, mathematics, and astrophysics.
Book Synopsis An Introduction to Quantum Theory by : J Greensite
Download or read book An Introduction to Quantum Theory written by J Greensite and published by Myprint. This book was released on 2017-02-17 with total page 532 pages. Available in PDF, EPUB and Kindle. Book excerpt:
