Download or read book tude de la cristallisation de quelques verres m talliques base de fer et base d aluminium written by André Bildé and published by . This book was released on 1986 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Verre m tallique base de Fer Etudes thermiques et structurales written by Abderrezak Bouchareb and published by Editions Universitaires Europeennes. This book was released on 2016-01-04 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: Les verres metalliques sont des materiaux recents, obtenus par refroidissement rapide d'un alliage en fusion. Ces materiaux presentent des caracteristiques uniques des hautes proprietes physiques, chimiques et mecaniques. L'objectif de ce travail est d'elaborer et caracteriser un verre metallique a base de Fer dans le systeme Fe-Cr-Mo-C-B sous la forme de plaquette, conique et cylindrique de differents diametres et epaisseurs et de rubans avec et sans ajout d'une petite quantite de terre rare (Y/Gd) ainsi que l'etude de l'aptitude a la vitrification (Glass Forming Ability, GFA). Apres l'illustration de l'effet de la vitesse de trempe de l'alliage liquide dans le moule en cuivre sur l'aptitude a la vitrification de chaque partie du plaquette, on s'interessera a l'etude de la cinetique de cristallisation par diffraction de rayon X a haute temperature (in situ-XRD) puis par calorimetre differentiel a balayage (DSC) afin de comparer la temperature de debut et fin de cristallisation de chaque technique."
Download or read book ELABORATION ET CARACTERISATION DE VERRES METALLIQUES A BASE D ALUMINIUM written by DENIS.. BECHET and published by . This book was released on 1992 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: CERTAINS ALLIAGES D'ALUMINIUM PEUVENT ETRE OBTENUS SOUS FORME AMORPHE LORSQU'ILS SONT SOLIDIFIES RAPIDEMENT. DES ETUDES RECENTES A L'INSTITUTE FOR MATERIALS RESEARCH (SENDAI, JAPON) ONT PERMIS DE DRESSER UNE LISTE ASSEZ COMPLETE DES ALLIAGES BINAIRES ET TERNAIRES AMORPHISABLES PAR LA TECHNIQUE DU MELT SPINNING. L'OBJET DE CETTE ETUDE EST DE COMPRENDRE LES MECANISMES DE FORMATION DES VERRES D'ALUMINIUM. APRES UNE REVUE DES CONSEQUENCES DE LA SOLIDIFICATION RAPIDE SUR LA MICROSTRUCTURE, EXPRIMEES EN TERMES DE DEPLACEMENT DE L'EUTECTIQUE ET DE FORMATION DE SOLUTIONS SOLIDES ETENDUES, UNE ILLUSTRATION CONCRETE EST DONNEE SUR LES BINAIRES AL-SI, AL-CU, AL-FE, AL-Y, AL-NI. L'AMORPHISATION DES ALLIAGES D'ALUMINIUM EST EXPRIMEE EN TERMES DE CROISSANCE COUPLEE. L'ADDITION DE METAUX DE TRANSITION ZR, HF OU TI PERMET D'AMELIORER LA CAPACITE A FORMER DES AMORPHES DU BINAIRE AL-NI, PAR AUGMENTATION DE LA TEMPERATURE DE TRANSITION VITREUSE OU DESTABILISATION DE LA SOLUTION SOLIDE. CONTRAIREMENT A LA PLUPART DES AMORPHES METALLIQUES GENERALEMENT DUCTILES, LES AMORPHES BASE ALUMINIUM NE SONT DUCTILES QUE DANS UN FAIBLE DOMAINE DE COMPOSITION. L'OBSERVATION DE LA MICROSTRUCTURE EN MICROSCOPIE ELECTRONIQUE A TRANSMISSION DE VERRES DU SYSTEME AL-NI-ZR MONTRE QU'IL N'Y A PAS DE STRUCTURE CRISTALLINE D'UNE TAILLE SUPERIEURE A 20 A. CETTE TECHNIQUE N'A TOUTEFOIS PAS PERMIS DE METTRE EN EVIDENCE LA RELATION ENTRE MICROSTRUCTURE ET DUCTILITE
Download or read book Contribution l tude de la fragilisation thermique de verres m talliques base de fer et de nickel written by Denis Bijaoui and published by . This book was released on 1987 with total page 235 pages. Available in PDF, EPUB and Kindle. Book excerpt: 02ETUDE DU PHENONMENE DE FRAGILISATION DANS DES ALLIAGES AMORPHES DU SYSTEME FE-NI-B ET FE-NI-P ELABORES PAR FILAGE DEPUIS L'ETAT LIQUIDE ET SOUMIS A UN RECUIT ENTRE LA TEMPERATURE AMBIANTE ET LA TEMPERATURE DE CRISTALLISATION. CORRELATION ENTRE LA FRAGILISATION ET LA CRISTALLISATION SUPERFICIELLE DES RUBANS APRES TRAITEMENT THERMIQUE. EXPLICATION DES DONNEES DE FRAGILISATION A PARTIR D'UN MODELE DE VOLUME LIBRE CONJUGUE AUX MODELES DE STRUCTURE
Download or read book Influence de la relaxation structurale et de la cristallisation sur les propri t s microm caniques de verres m talliques base fer written by Françoise Michalet-Guyot and published by . This book was released on 1982 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book ETUDE DE LA CRISTALLISATION DES VERRES METALLIQUES NI 8 1 B 1 9 ET FECR 7 7 B 2 3 PAR DIFFUSION DE NEUTRONS ET SIMULATIONS NUMERIQUES written by Christophe Back and published by . This book was released on 1995 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt: LE VERRE METALLIQUE NI#8#1B#1#9 CRISTALLISE EN UNE SEULE ETAPE PAR FORMATION SIMULTANEE DES PHASES CRISTALLINES NI ET NI#3B DE TYPE CEMENTITE LE VERRE METALLIQUE (FECR)#7#7B#2#3 FORME DE FACON POLYMORPHE LA PHASE (FECR) . LA FORME DES CRISTALLITES EST OVOIDE. ET L'AMORPHE EST CONSTITUE D'UNE MULTITUDE DE DOMAINES D'UN NANOMETRE D'EXTENSION ORDONNES MAIS DESORIENTES LES UNS PAR RAPPORT AUX AUTRES. LA DIFFUSION NEUTRONIQUE AUX PETITS ANGLES MET EN EVIDENCE LA PRESENCE D'INHOMOGENEITES CHIMIQUES DEJA PRESENTES DANS L'AMORPHE QUI S'AMPLIFIENT PENDANT LA CRISTALLISATION. LES SIMULATIONS NUMERIQUES DE NI#8#1 B#1#9 AMORPHE PAR LA TECHNIQUE DE MONTE CARLO INVERSE ONT PERMIS DE CONSTRUIRE DES AMAS EN EXCELLENT ACCORD AVEC LES PARTIELLES DE LAMPARTER. DANS CES AMAS, LES ATOMES DE BORE OCCUPENT SOIT LE CENTRE D'UN TETRAKAIDECAEDRE SOIT LE CENTRE D'UN ANTIPRISME D'ARCHIMEDE. CES ENVIRONNEMENTS DE TYPE PRISMATIQUE SONT CONNECTES LES UNS AUX AUTRES PAR DES ARETES. L'ORDRE A COURTE DISTANCE (PRISME DE NICKEL AUTOUR DU BORE) ET A MOYENNE DISTANCE (CONNEXION PAR LES ARETES) DU CRISTAL NI#3B EST PRESENT, MAIS PAS L'ORDRE A LONGUE DISTANCE. DE PLUS, UNE STRUCTURE AMORPHE PRESENTANT DES INHOMOGENEITES CHIMIQUES (ZONES SANS ATOME DE BORE) EST COMPATIBLE AVEC LES DONNEES EXPERIMENTALES. CES SIMULATIONS VALIDENT LE MODELE DU MACLAGE CHIMIQUE. EN PARTICULIER, LA PARTITION DES ELEMENTS AURAIT LIEU PENDANT L'AMORPHISATION OU MEME AVANT, DANS L'ETAT LIQUIDE. LA CRISTALLISATION PEUT DONC SE PRODUIRE SANS FAIRE APPEL A LA DIFFUSION A LONGUE DISTANCE. LA TECHNIQUE DE MONTE CARLO INVERSE SANS LES CONDITIONS PERIODIQUES A PERMIS DE FAIRE CROITRE DES CRISTALLITES AU SEIN DE L'AMORPHE. LES DONNEES ISSUES DE DIFFUSION NEUTRONIQUE NE SONT PAS UTILISEES POUR CONTROLER L'OPTIMISATION MAIS ELLES SONT GLOBALEMENT REPRODUITES
Download or read book Etudes Et Documentation Metallurgiques written by and published by . This book was released on 1956 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Journal of the Iron and Steel Institute written by Iron and Steel Institute and published by . This book was released on 1920 with total page 880 pages. Available in PDF, EPUB and Kindle. Book excerpt: Includes sect. "A survey of literature on the manufacture and properties of iron and steel, and kindred subjects" (title varies)
Download or read book Climate in Museums written by Gael de Guichen and published by . This book was released on 1980 with total page 77 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Analytical Methods in the Nuclear Fuel Cycle written by and published by . This book was released on 1972 with total page 610 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A German English Dictionary for Chemists written by Austin M 1876-1956 Patterson and published by Scholar Select. This book was released on 2015-08-08 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Download or read book La sid rurgie ancienne de l Est de la France dans son contexte europ en written by Michel Mangin and published by Belles Lettres. This book was released on 1994 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt: Eisenindustrie - Hüttenwesen - Ostfrankreich.
Download or read book Glossary of Soil Science Terms 2008 written by Soil Science Society of America and published by ASA-CSSA-SSSA. This book was released on 2008 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt: More than 1800 terms are included in this revised glossary. Subject matter includes soil physics, soil chemistry, soil biology and biochemistry, pedology, soil and water management and conservation, forest and range soils, nutrient management and soil and plant analysis, mineralogy, wetland soils, and soils and environmental quality. Two appendices on tabular information and designations for soil horizons and layers also are included.
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 Critical Metals Handbook written by Gus Gunn and published by John Wiley & Sons. This book was released on 2014-01-06 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mankind is using a greater variety of metals in greater quantities than ever before. As a result there is increasing global concern over the long-term availability of secure and adequate supplies of the metals needed by society. Critical metals, which are those of growing economic importance that might be susceptible to future scarcity, are a particular worry. For many of these we have little information on how they are concentrated in the Earth’s crust, how to extract them from their ores, and how to use, recycle and dispose of them effectively and safely. Published with the British Geological Survey, the Critical Metals Handbook brings together a wealth of knowledge on critical metals and provides a foundation for improving the future security and sustainability of critical metal supplies. Written by international experts, it provides a unique source of authoritative information on diverse aspects of the critical metals, including geology, deposits, processing, applications, recycling, environmental issues and markets. It is aimed at a broad non-specialist audience, including professionals and academics working in the exploration and mining sectors, in mining finance and investment, and in mineral processing and manufacturing. It will also be a valuable reference for policy makers concerned with resource management, land-use planning, eco-efficiency, recycling and related fields.
Download or read book The Rare Earth Elements written by David A. Atwood and published by John Wiley & Sons. This book was released on 2013-02-19 with total page 994 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lanthanides are of great importance for the electronic industries, this new book (from the EIBC Book Series) provides a comprehensive coverage of the basic chemistry, particularly inorganic chemistry, of the lanthanoid elements, those having a 4f shell of electrons. A chapter is describing the similarity of the Group 3 elements, Sc, Y, La, the group from which the lanthanoids originate and the group 13 elements, particularly aluminum, having similar properties. Inclusion of the group 3 and 13 elements demonstrates how the lanthanoid elements relate to other, more common, elements in the Periodic Table. Beginning chapters describe the occurrence and mineralogy of the elements, with a focus on structural features observed in compounds described in later chapters. The majority of the chapters is organized by the oxidation state of the elements, Ln(0), Ln(II), Ln(III), and Ln(IV). Within this organization the chapters are further distinguished by type of compound, inorganic (oxides and hydroxides, aqueous speciation, halides, alkoxides, amides and thiolates, and chelates) and organometallic. Concluding chapters deal with diverse and critically important applications of the lanthanoids in electronic and magnetic materials, and medical imaging.
Download or read book On Induction written by Michael 1791-1867 Faraday and published by Legare Street Press. This book was released on 2021-09-09 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work has been selected by scholars as being culturally important and is part of the knowledge base of civilization as we know it. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. To ensure a quality reading experience, this work has been proofread and republished using a format that seamlessly blends the original graphical elements with text in an easy-to-read typeface. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
