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Elaboration Et Caracterisation Dalliages Magnetiques Fe Si Et Fe Si Al Enrichis Par Depot Chimique A Partir Dune Phase Gazeuse Pour Des Applications A Basses Et Moyennes Frequences
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Book Synopsis Elaboration et caractérisation d'alliages magnétiques Fe-Si et Fe-Si-Al enrichis par dépôt chimique à partir d'une phase gazeuse pour des applications à basses et moyennes fréquences by : Serge Crottier-Combe
Download or read book Elaboration et caractérisation d'alliages magnétiques Fe-Si et Fe-Si-Al enrichis par dépôt chimique à partir d'une phase gazeuse pour des applications à basses et moyennes fréquences written by Serge Crottier-Combe and published by . This book was released on 1994 with total page 520 pages. Available in PDF, EPUB and Kindle. Book excerpt: LE BUT DE CE TRAVAIL CONSISTE A ELABORER DES MATERIAUX MAGNETIQUES DOUX FER-SILICIUM-ALUMINIUM ET FER-SILICIUM PAR DEPOT CHIMIQUE EN PHASE GAZEUSE ET DE COMPARER LEURS PROPRIETES MAGNETIQUES A CELLES D'ALLIAGES INDUSTRIELS. LES INTERACTIONS SURFACE METALLIQUE-PHASE GAZEUSE HALOGENEE CONDUISENT DES LES PREMIERS INSTANTS A UNE GERMINATION EPITAXIQUE DES COMPOSES FER-SILICIUM-ALUMINIUM PUIS A UNE SOLUTION SOLIDE SOUS-JACENTE APRES DIFFUSION. LES TENEURS EN SILICIUM ET/OU EN ALUMINIUM AINSI QUE LES GRADIENTS DE CONCENTRATION OBTENUS DEPENDENT DES CONDITIONS DE DEPOT (PROCEDES STATIQUE ET DYNAMIQUE, NATURE ET COMPOSITION DES GAZ, TEMPERATURE, DUREE DE TRAITEMENT ET NATURE DES SUBSTRATS). DES ETUDES CINETIQUES ONT ETE REALISEES ET LEURS INTERPRETATIONS SONT BASEES SUR LES OBSERVATIONS EFFECTUEES PAR MICROSCOPIE OPTIQUE ET ELECTRONIQUE ET RADIOCRISTALLOGRAPHIE. LES PROPRIETES MAGNETIQUES ET MAGNETOMECANIQUES DE CES ALLIAGES SONT DONNEES. L'ENRICHISSEMENT EN SILICIUM ET/OU EN ALUMINIUM PERMET DE REDUIRE CONSIDERABLEMENT LES PERTES MAGNETIQUES, LES CONSTANTES DE MAGNETOSTRICTION ET LES EFFETS MAGNETOMECANIQUES (CAPACITE D'AMORTISSEMENT DE VIBRATIONS, EMISSION MAGNETOACOUSTIQUE)
Book Synopsis L'ELABORATION PAR LA TECHNIQUE C.V.D D'ALLIAGES FER-SILICIUM 6.5% EN POIDS ET L'ETUDE DE LEURS PROPRIETES MAGNETIQUES by : FARZAD.. KHOMAMIZADEH
Download or read book L'ELABORATION PAR LA TECHNIQUE C.V.D D'ALLIAGES FER-SILICIUM 6.5% EN POIDS ET L'ETUDE DE LEURS PROPRIETES MAGNETIQUES written by FARZAD.. KHOMAMIZADEH and published by . This book was released on 1997 with total page 155 pages. Available in PDF, EPUB and Kindle. Book excerpt: LE BUT DE CE TRAVAIL A CONSISTE D'UNE PART A ELABORER DES ALLIAGES FER-SILICIUM A 6.5% MASSE DE SI PAR LA TECHNIQUE DE DEPOT CHIMIQUE A PARTIR D'UNE PHASE GAZEUSE, D'AUTRE PART A LES CARACTERISER TANT DU POINT DE VUE STRUCTURAL QUE MAGNETIQUE. NOUS AVONS UTILISE COMME GAZ SILICIURANT LE SILANE (SIH4) ET COMME ECHANTILLON INITIAL DES ALLIAGES FER-SILICIUM A 3.2% DE SILICIUM LAMINES A 100 M PUIS RECUITS. LA QUALITE DES COUCHES OBTENUES DEPEND DES CONDITIONS DE DEPOT (TEMPERATURE, DUREE DE TRAITEMENT, COMPOSITION ET DEBIT DES GAZ ET NATURE DES SUBSTRATS). DES ETUDES CINETIQUES ONT ETE REALISEES ET LEURS INTERPRETATIONS SONT BASEES SUR LES OBSERVATIONS EFFECTUEES PAR MICROSCOPIE OPTIQUE ET ELECTRONIQUE ET RADIOCRISTALLOGRAPHIE. LES PROPRIETES MAGNETIQUES DE CES ALLIAGES ONT ETE ETUDIEES. L'ENRICHISSEMENT EN SILICIUM PERMET DE REDUIRE CONSIDERABLEMENT LES PERTES CLASSIQUES. CEPENDANT, L'AUGMENTATION DU NOMBRE DES GRAINS PENDANT LE TRAITEMENT CVD CONDUIT A UNE CROISSANCE DES PERTES TOTALES A BASSES ET MOYENNES FREQUENCES (0.5-5000 HZ). AUX HAUTES FREQUENCES (5-10 KHZ) LES PERTES TOTALES SONT SIMILAIRES A CELLES MESUREES AVANT LA SILICIURATION. L'EFFET DE LA STRUCTURE ET DES IMPERFECTIONS DE SURFACE EST MIS EN EVIDENCE.
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.
Book Synopsis Guide to Nuclear Power Cost Evaluation: Equipment costs by : Kaiser Engineers
Download or read book Guide to Nuclear Power Cost Evaluation: Equipment costs written by Kaiser Engineers and published by . This book was released on 1962 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Properties of UO2 written by J. Belle and published by . This book was released on 1957 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fuel Cell Technology Handbook by : Gregor Hoogers
Download or read book Fuel Cell Technology Handbook written by Gregor Hoogers and published by CRC Press. This book was released on 2002-09-27 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fuel cell systems have now reached a degree of technological maturity and appear destined to form the cornerstone of future energy technologies. But the rapid advances in fuel cell system development have left current information available only in scattered journals and Internet sites. The even faster race toward fuel cell commercialization further
Book Synopsis Handbook of Membrane Separations by : Anil Kumar Pabby
Download or read book Handbook of Membrane Separations written by Anil Kumar Pabby and published by CRC Press. This book was released on 2015-04-09 with total page 868 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Handbook of Membrane Separations: Chemical, Pharmaceutical, Food, and Biotechnological Applications, Second Edition provides detailed information on membrane separation technologies from an international team of experts. The handbook fills an important gap in the current literature by providing a comprehensive discussion of membrane application
Author :International Atomic Energy Agency Publisher :International Atomic Energy Agency ISBN 13 :9789201063205 Total Pages :72 pages Book Rating :4.0/5 (632 download)
Book Synopsis In-Vessel Melt Retention and Ex-Vessel Corium Cooling: IAEA Tecdoc No. 1906 by : International Atomic Energy Agency
Download or read book In-Vessel Melt Retention and Ex-Vessel Corium Cooling: IAEA Tecdoc No. 1906 written by International Atomic Energy Agency and published by International Atomic Energy Agency. This book was released on 2020-08-06 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: This publication results from a technical meeting on phenomenology and technologies relevant to in-vessel melt retention (IVMR) and ex-vessel corium cooling (EVCC). The purpose of the publication is to capture the state of knowledge, at the time of that meeting, related to phenomenology and technologies as well as the challenges and pending issues relevant to IVMR and EVCC for water cooled reactors by summarizing the information provided by the meeting participants in a form useful to practitioners in Member States.
Book Synopsis Serial Reports on Start-up Experiments by : J. Chernick
Download or read book Serial Reports on Start-up Experiments written by J. Chernick and published by . This book was released on 1955 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis L'Esprit de L'Escalier by : Dominique / D. Bonten /
Download or read book L'Esprit de L'Escalier written by Dominique / D. Bonten / and published by CreateSpace. This book was released on 2014-01 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: L'esprit de L'escalier is a French term for when you think of what you should have said after it is too late. This is a collection of poetry; These are things you wish you said.
Book Synopsis The Evolution of Technology by : George Basalla
Download or read book The Evolution of Technology written by George Basalla and published by Cambridge University Press. This book was released on 1989-02-24 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents an evolutionary theory of technological change based upon recent scholarship in the history of technology and upon relevant material drawn from economic history and anthropology. It challenges the popular notion that technology advances by the efforts of a few heroic individuals who produce a series of revolutionary inventions owing little or nothing to the technological past. Therefore, the book's argument is shaped by analogies taken selectively from the theory of organic evolution, and not from the theory and practice of political revolution. Three themes appear, and reappear with variations, throughout the study. The first is diversity: an acknowledgment of the vast numbers of different kinds of made things (artifacts) that have long been available to humanity; the second is necessity: the belief that humans are driven to invent new artifacts in order to meet basic biological requirements such as food, shelter, and defense; and the third is technological evolution: an organic analogy that explains both the emergence of novel artifacts and their subsequent selection by society for incorporation into its material life without invoking either biological necessity or technological progress. Although the book is not intended to provide a strict chronological account of the development of technology, historical examples - including many of the major achievements of Western technology: the waterwheel, the printing press, the steam engine, automobiles and trucks, and the transistor - are used extensively to support its theoretical framework. The Evolution of Techology will be of interest to all readers seeking to learn how and why technology changes, including both students and specialists in the history of technology and science.
Book Synopsis Technology in Western Civilization: Technology in the twentieth century by : Melvin Kranzberg
Download or read book Technology in Western Civilization: Technology in the twentieth century written by Melvin Kranzberg and published by Oxford University Press, USA. This book was released on 1967 with total page 792 pages. Available in PDF, EPUB and Kindle. Book excerpt: A complete and well-planned account of the history of technology in Western civilization from pre-historic man to the present age of the computer.
Book Synopsis An Encyclopaedia of the History of Technology by : Ian McNeil
Download or read book An Encyclopaedia of the History of Technology written by Ian McNeil and published by . This book was released on 1996 with total page 1062 pages. Available in PDF, EPUB and Kindle. Book excerpt: Available for the first time in paperback, this volume includes twenty-two chapters by international experts covering the entire history of technology from humankind's earliest use of stone tools to the exploration of space. Written clearly and without unnecessary jargon, each chapter traces the development of its subject from earliest times to the present day, stressing the social context and its place in scientific thought. * Usefully drawn with over 150 tables, drawings and photographs * Two comprehensive indexes of names and subjects * Essential reading for teachers and students in the History and Philosophy of Science and Technology, Industrial History and Archaeology.
Book Synopsis A History of Technology: The Mediterranean civilizations and the Middle Ages, c. 700 B.C. to c. 1500 A.D by : Charles Singer
Download or read book A History of Technology: The Mediterranean civilizations and the Middle Ages, c. 700 B.C. to c. 1500 A.D written by Charles Singer and published by . This book was released on 1954 with total page 910 pages. Available in PDF, EPUB and Kindle. Book excerpt:
