Download or read book D veloppement d alliages de surface labor s sous faisceau laser sur substrat aluminium written by Laurent Dubourg and published by . This book was released on 2002 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt: L'étude a été menée selon 2 axes : le développement du rechargement laser sur aluminium et l'amélioration des propriétés mécaniques des revêtements. L'originalité du travail a résidé dans la mise en œuvre de lasers Nd:YAG couplés avec une buse d'injection coaxiale et dans la pluralité des alliages étudiés (base Al avec addition de 1 ou 2 éléments : Cu, Co, Cr, Fe, Mo, Ni, Si et Sn, élaboration de matériaux composites avec renfort de carbures : WC, TiC ou SiC).En premier lieu, une technique d'alliage de surface par prédépôt a été utilisée sur un substrat d'aluminium 1050. Des alliages binaires ont ainsi été réalisés avec des teneurs en soluté de 0 à 50 wt.%. Selon l'élément et sa proportion, les matériaux présentent des microstructures variées (hypoeutectique, eutectique ou hypereutectique), un durcissement important (250-300 HV0,2) et une amélioration de la tenue à l'usure adhésive. La nanoindentation nous a permis d'analyser l'isotropie mécanique de ces alliages et d'appréhender leur comportement élastique et plastique (module d'élasticité, retour élastique et index plastique). En considérant l'ensemble de ces propriétés, les éléments les plus performants pour l'alliation de l'aluminium sous faisceau laser nous a semblé être le cuivre, le molybdène, le nickel et le silicium. Dans un deuxième temps, deux ensembles optique/tête d'injection ont été mis au point avec des lasers Nd:YAG de 2 et 4 kW pour l'opération de rechargement sur un substrat AS7G. Le travail a alors été poursuivi selon trois voies :L'élaboration d'alliages ternaires d'aluminium avec les éléments retenus précédemment (Cu, Mo, Ni, Si). Ces matériaux ont révélé un durcissement proche de 500 HV5 sans fissure et une meilleure résistance à l'usure adhésive que les alliages binaires.L'étude des déformations du substrat et des contraintes résiduelles au sein du revêtement.La fabrication de composites à matrice métallique avec renfort de carbures (WC, SiC et TiC). L'ajout de renforts et de silicium augmente la dureté globale du CMM et influence fortement le régime d'usure.
Download or read book Surface Engineering for Wear Resistance written by Kenneth G. Budinski and published by . This book was released on 1988 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt: Very Good,No Highlights or Markup,all pages are intact.
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:
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 Surface Modification Technologies XIV written by T. S. Sudarshan and published by . This book was released on 2001 with total page 672 pages. Available in PDF, EPUB and Kindle. Book excerpt: Surface Modification Technologies XIV presents the reviewed and edited proceedings of the SMT conference held September 2000, in Paris. The proceedings describe state-of-the-art surface engineering work in thermal spray, high-performance coatings, biomaterials, PVD, CVD, testing, wear resistance, laser-assisted surface modification, corrosion, and other topics. Contents include: Thermal spraying; High performance coatings; Bio materials; Testing and analysis; PVD and CVD; Wear; Laser processing; Corrosion and fatigue; Arts and surfaces; Plasma-assisted and advanced processes; Modeling; and Poster presentations.
Download or read book Metallic Magnetism written by I. A. Campbell and published by Springer. This book was released on 1987 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book ZnO Thin Films written by Paolo Mele and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Zinc oxide (ZnO) is an n-type semiconductor with versatile applications such as optical devices in ultraviolet region, piezoelectric transducers, transparent electrode for solar cells and gas sensors. This book "ZnO Thin Films: Properties, Performance and Applications" gives a deep insight in the intriguing science of zinc oxide thin films. It is devoted to cover the most recent advances and reviews the state of the art of ZnO thin films applications involving energy harvesting, microelectronics, magnetic devices, photocatalysis, photovoltaics, optics, thermoelectricity, piezoelectricity, electrochemistry, temperature sensing. It serves as a fundamental information source on the techniques and methodologies involved in zinc oxide thin films growth, characterization, post-deposition plasma treatments and device processing. This book will be invaluable to the experts to consolidate their knowledge and provide insight and inspiration to beginners wishing to learn about zinc oxide thin films.
Download or read book Electrons in Molecules written by Jean-Pierre Launay and published by Oxford University Press, USA. This book was released on 2014 with total page 511 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this book is to provide the reader with essential keys to a unified understanding of the rapidly expanding field of molecular materials and devices: electronic structures and bonding, magnetic, electrical and photo-physical properties, and the mastering of electrons in molecular electronics. Chemists will discover how basic quantum concepts allow us to understand the relations between structures, electronic structures, and properties of molecular entities and assemblies, and to design new molecules and materials. Physicists and engineers will realize how the molecular world fits in with their need for systems flexible enough to check theories or provide original solutions to exciting new scientific and technological challenges. The non-specialist will find out how molecules behave in electronics at the most minute, sub-nanosize level. The comprehensive overview provided in this book is unique and will benefit undergraduate and graduate students in chemistry, materials science, and engineering, as well as researchers wanting a simple introduction to the world of molecular materials.
Download or read book Magnetoelectric Interaction Phenomena in Crystals written by Manfred Fiebig and published by Springer Science & Business Media. This book was released on 2013-11-09 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the quest for higher data density in information technology manipulation of magnetization by other means than magnetic fields has become an important challenge. This lead to a startling revival of the magnetoelectric effect, which characterizes induction of a polarization by a magnetic field or of a magnetization by an electric field. The magnetoelectric crosslink of material properties opens just those degrees of freedom which are needed for the mutual control of magnetic and electric states. The book gives a state-of-the-art review on magnetoelectrics research, classifies current research tendencies, and points out possible future trends. Novel compounds and growth techniques and new theoretical concepts for the understanding of magnetoelectric coupling phenomena are introduced. Highlights are the discovery of "gigantic" magnetoelectric effects which are strong enough to trigger electric or magnetic phase transitions; the concept of magnetochirality; and development "structural" magnetoelectric effects in artificial multiphase compounds. The book is addressed to condensed-matter physicists with a particular focus on experts in highly correlated systems.
Download or read book Modern Aspects of Small Angle Scattering written by H. Brumberger and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 470 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of the NATO Advanced Study Institute, Como, Italy, May 12--22, 1993
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:
Download or read book Scientific Canadian Mechanics Magazine and Patent Office Record written by Canada. Patent Office and published by . This book was released on 1966-03 with total page 1070 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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.
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
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.
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 High Performance Materials in Engine Technology written by P. Vincenzini and published by Techna Group. This book was released on 1995 with total page 558 pages. Available in PDF, EPUB and Kindle. Book excerpt:
