Download or read book Applications of Photonic Technology 2 written by George A. Lampropoulos and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 894 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a current review ofphotonic technologies and their applications. The papers published in this book are extended versions of the papers presented at the Inter national Conference on Applications ofPhotonic Technology (ICAPT'96) held in Montreal, Canada, on July 29 to August 1, 1996. The theme of this event was "Closing the Gap Between Theory, Developments and Applications. " The term photonics covers both optics and optical engineering areas of growing sci entific and commercial importance throughout the world. It is estimated that photonic tech nology-related applications to increase exponentially over the next few years and will play a significant role in the global economy by reaching a quarter of a trillion of US dollars by the year 2000. The global interest and advancements of this technology are represented in this book, where leading scientists of twenty-two countries with advanced technology in photon ics present their latest results. The papers selected herein are grouped to address six distinct areas ofphotonic tech nology. The reader will find throughout the book a combination of invited and contributed papers which reflect the state of the art today and provide some insight about the future of this technology. The first two papers are invited. They discuss business aspects ofphotonic engineer ing. One examines if chip-to-chip interconnections by means of optical technology are a good economic choice, while the other discusses the photonic technology from entre preneurial viewpoint. Papers related to materials and considered for photonic applications, e. g.
Download or read book Journal de Physique written by and published by . This book was released on 1991 with total page 1012 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book REALISATION D ALLIAGES DE SURFACE SOUS FAISCEAU LASER written by GUO QIANG.. SONG and published by . This book was released on 1995 with total page 183 pages. Available in PDF, EPUB and Kindle. Book excerpt: UN RECENSEMENT DES DIFFERENTES ETUDES REALISEES DANS LE DOMAINE DE L'ALLIAGE DE SURFACE PAR LASER, NOUS A TOUT D'ABORD PERMIS DE FAIRE LE LIEN ENTRE LES DIFFERENTES MICROSTRUCTURES RENCONTREES DANS LES ACIERS CONSTITUANT LES OUTILS DE COUPE ET LEURS PROPRIETES MECANIQUES, ENTRE LE CHOIX DES DIVERS MATERIAUX UTILISES EN MODIFICATION DE SURFACE ET LA NATURE DES LIAISONS CHIMIQUES ENTRE PARTICULES D'APPORT ET MATRICES. A LA SUITE DE CE TRAVAIL, NOUS AVONS REALISE, A L'AIDE D'UN LASER CO#2, DES ALLIAGES DE SURFACE EN INJECTANT TROIS TYPES DE POUDRES: DU CARBURE DE TUNGSTENE ENROBE DE NICKEL, DU CARBURE DE BORE, ET UN MELANGE DE CARBURE DE BORE ET DE ZIRCONE, DANS DEUX TYPES DE SUBSTRAT: ACIER RAPIDE M42 ET ACIER 35CD4. CHAQUE COUCHE TRAITEE PAR LASER A ETE CARACTERISEE PAR DES MESURES DE MICRODURETE, DE CONTRAINTES RESIDUELLES, DES OBSERVATIONS METALLOGRAPHIQUES REALISEES AU MICROSCOPE OPTIQUE ET AU MICROSCOPE ELECTRONIQUE AU BALAYAGE, DES ANALYSES DE PHASES PAR DIFFRACTION DE RAYONS X ET PAR SPECTROSCOPIE ELECTRONIQUE AUGER. TROIS SERIES D'ESSAIS ONT ETE EFFECTUEES: A. INJECTION DE CARBURE DE TUNGSTENE ET DE CARBURE DE BORE DANS L'ACIER RAPIDE M42 L'ACIER RAPIDE M42 REFONDU PAR LASER SANS INJECTION DE POUDRE ATTEINT UNE DURETE DE 1000 HV ; UNE INJECTION DE POUDRE DE CARBURE DE TUNGSTENE PERMET, A CONDITION DE MAINTENIR UN DEBIT DE POUDRE INFERIEUR A 3 G/MN, D'OBTENIR APRES REVENU UNE DURETE DE 1200 HV, DUE A LA PRESENCE DE MARTENSITE ET DE CARBURES DE TYPE M#2#3C#6 ET M#1#2C. L'INJECTION DE CARBURE DE BORE DONNE UNE MICROSTRUCTURE PLUS HETEROGENE OU L'ON RENCONTRE DES PHASES DE FER ET FER , DE BORURE DE FER FE#2#3B ET FE#3B, DE CARBURE M#6C ET DU CARBURE DE BORE NON DISSOUS: UN DEBIT DE 0.8 G/MN A PERMIS D'OBTENIR DES VALEURS DE DURETE COMPRISES ENTRE 1300 HV ET 1900 HV DANS LA ZONE FONDUE. B. INJECTION DE CARBURE DE BORE DANS L'ACIER 35CD4 L'ACIER 35CD4 REFONDU PAR LASER A UNE DURETE DE 800 HV DUE A LA MARTENSITE ET NE PRESENTE NI FISSURE NI POROSITE. L'INJECTION DE CARBURE DE BORE AVEC DEBIT DE POUDRE OPTIMISE PERMET L'OBTENTION D'UN CORDON NON POREUX ET SANS FISSURE A CONDITION DE PRECHAUFFER PREALABLEMENT: DANS CE CAS, LA DURETE VARIANT DE 1400 A 1800 HV EST DUE A UNE STRUCTURE TRES FINE ET HOMOGENE OU LE CARBURE DE BORE BIEN DISSOUS PERMET LA DIFFUSION DU BORE ET DU CARBONE AINSI QUE LA FORMATION DE BORURE DE FER FE#2B (1800 HV) ET D'EUTECTIQUES TRES FINS. L'ACIER 35CD4 TRAITE PAR LASER VOIT AINSI SES PROPRIETES DE SURFACE REJOINDRE CELLES DES ACIERS RAPIDES PLUS CHERS ET GENERALEMENT PLUS PERFORMANTS. C. INJECTION D'UN MELANGE B#4C ET ZIRCONE ZRO#2 DANS L'ACIER 35CD4 LE BUT DE CETTE INJECTION EST D'OPTIMISER LES CONDITIONS OPERATOIRES RENCONTREES AVEC LE B#4C SEUL EN UTILISANT DE LA ZIRCONE PERMETTANT DE SUPPRIMER L'ETAPE DE PRECHAUFFAGE INDISPENSABLE A LA DISPARITION DES FISSURES: EN EFFET ZRO#2 INTRODUIT DES CONTRAINTES EN COMPRESSION DANS LA ZONE FONDUE QUI PERMET DE REFERMER LES FISSURES. ZRO#2 SE TROUVE ALORS A L'ETAT DE PHASE TETRAGONALE INSTABLE A L'INTERIEUR DE LA ZONE FONDUE QUI PRESENTE UNE DURETE CONSTANTE DE 1400 HV SUR UNE PROFONDEUR DE 1.8 MM. DES ALLIAGES DE SURFACE REMARQUABLES PAR LEUR DURETE ET LEURS PROPRIETES MECANIQUES ONT AINSI ETE REALISES PAR INJECTION DE CARBURE DE BORE ET OXYDE DE ZIRCONIUM ; LEUR MICROSTRUCTURE, TRES REPRODUCTIBLE DANS LES CONDITIONS EXPERIMENTALES UTILISEES, NE PRESENTE NI FISSURE NI POROSITE. LEUR UTILISATION DEVRAIT PRESENTER UN INTERET ECONOMIQUE CERTAIN DANS LE DOMAINE INDUSTRIEL. MAIS SURTOUT, D'UN POINT DE VUE THEORIQUE, CETTE ETUDE NOUS A PERMIS D'ETABLIR LE ROLE STABILISANT JOUE PAR L'OXYDE DE ZIRCONIUM AU NIVEAU DE LA REPARTITION DES CONTRAINTES OCCASIONNEES PAR L'INTRODUCTION DE PARTICULES DURES DANS UN SUBSTRAT SOUS FAISCEAU LASER ET DE PRECISER AINSI LES DIFFERENTS MECANISMES QUI ENTRENT EN JEU LORS DE LA SOLIDIFICATION DE TELS ALLIAGES
Download or read book ALLIAGES DE SURFACE ET DE REVETEMENTS ELABORES SOUS FAISCEAU LASER PAR PROJECTION DE POUDRE SUR SUBSTRAT BASE ALUMINIUM written by PIERRE.. SALLAMAND and published by . This book was released on 1994 with total page 229 pages. Available in PDF, EPUB and Kindle. Book excerpt: DEVANT LA NECESSITE CROISSANTE DE TRAITER LA SURFACE DES MATERIAUX, NOUS AVONS CHOISI D'ETUDIER LA TECHNIQUE D'ELABORATION D'ALLIAGES OU DE REVETEMENTS DE SURFACE PAR PROJECTION DE POUDRE ASSISTEE PAR FAISCEAU LASER CO2. CETTE METHODE PRESENTE L'AVANTAGE D'OBTENIR UN DEPOT DE COMPOSITION DETERMINEE ET EN UNE SEULE ETAPE. DANS CE BUT, NOUS AVONS DEVELOPPE UN SYSTEME D'INJECTION DE LA POUDRE COAXIAL AU FAISCEAU LASER, PERMETTANT LA REALISATION DE TRAITEMENTS MULTIDIRECTIONNELS. CETTE BUSE EST BASEE SUR LE PRINCIPE DE DEUX VORTEX INTERAGISSANT POUR QUE LE JET DE POUDRE, A LA SORTIE DE LA BUSE, SOIT SOUS FORME CYLINDRIQUE AVEC UNE REPARTITION DES GRAINS HOMOGENES DANS TOUT LE VOLUME. LE BON FONCTIONNEMENT DU SYSTEME EST LA PIERRE ANGULAIRE DE LA TECHNIQUE. NOUS AVONS ALORS PU ELABORER DES ALLIAGES DE SURFACE BASE AL-NI, DES REVETEMENTS COMPOSITES A MATRICE METALLIQUE (MATRICE: AL-NI; RENFORTS: CARBURE DE TITANE), AINSI QUE DES ALLIAGES QUASICRISTALLINS (AL-CU-FE) SUR DES SUBSTRATS BASE ALUMINIUM. LES CARACTERISATIONS MICROSTRUCTURALE ET MECANIQUE MONTRENT QUE LA MICROSTRUCTURE DES ALLIAGES ALNI EST CONSTITUE DE DENDRITES D'AL3NI ET AL3NI2, CONFERANT A L'ALLIAGE UNE DURETE POUVANT ATTEINDRE 600 HV ET UN MODULE D'ELASTICITE DE 130 GPA; L'AJOUT DE CARBURE DE TITANE ENTRAINE PEU DE CHANGEMENT DE MICROSTRUCTURE MAIS ELEVE LA DURETE MOYENNE VERS 800 HV ET LE MODULE A 180 GPA. LA CARACTERISATION TRIBOLOGIQUE DE CES DERNIERS, REVELE UN COMPORTEMENT DES PLUS INTERESSANT NOTAMMENT EN REGIME DE GLISSEMENT TOTAL. LES ALLIAGES QUASICRISTALLINS POSSEDENT UNE DURETE ELEVEE (700 HV), MAIS POSENT ENCORE QUELQUES PROBLEMES D'ELABORATION. NOUS AVONS MONTRE PAR NOS RESULTATS, QUE CETTE TECHNIQUE EST ADAPTEE POUR OBTENIR DES TRAITEMENTS DE SURFACE DE FORTES EPAISSEURS (1 MM) AVEC DE HAUTES PROPRIETES, PAR UN CHOIX APPROPRIE DU MATERIAU D'APPORT
Download or read book International Congress on High Speed Photography and Photonics written by and published by . This book was released on 1996 with total page 1154 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Alliages de surface et revetements elabores sous faisceau laser par projection de poudre sur subtrat base aluminium written by Pierre Sallamand and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book FORMATION D ALLIAGE DE SURFACE FER CHROME FER NICKEL PAR REFUSION SOUS FAISCEAU LASER written by HASSINA.. DJABI BOUDOUKHA and published by . This book was released on 1990 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: LE LASER, UTILISE COMME SOURCE D'ENERGIE, PERMET DE REALISER LA PLUPART DES TRAITEMENTS SUPERFICIELS ENVISAGEABLES. NOTRE ETUDE PORTE SUR LA FORMATION D'ALLIAGES FER-CHROME ET FER-NICKEL OBTENUS PAR FUSION SUPERFICIELLE D'UN ECHANTILLON DE FER PREALABLEMENT REVETU D'UN DEPOT ELECTROLYTIQUE DE NICKEL OU DE CHROME. L'ANALYSE METALLURGIQUE A PERMIS DE DEFINIR LES PARAMETRES DU TRAITEMENT (PUISSANCE LASER, VITESSE DE DEPLACEMENT, EPAISSEUR DE CHROME OU DE NICKEL...) POUR L'OBTENTION D'ALLIAGE HOMOGENE A TENEUR CONTROLEE EN ELEMENT D'ADDITION. DES SURFACES DE PLUSIEURS CM#2 ONT ETE ELABOREES PAR UN TRAITEMENT MULTIPASSES. L'HOMOGENEITE DES ALLIAGES EST PRESENTEE AINSI QUE DES RESULTATS D'ESSAI DE CORROSION EN MILIEU D'ACIDE SULFURIQUE
Download or read book REALISATION ASSISTEE PAR LASER D ALLIAGES DE SURFACE BASE ALUMINIUM OU CUIVRE ASPECTS MECANIQUE PHYSIQUE THERMODYNAMIQUE ET STATISTIQUE written by AHMAD.. ISSA and published by . This book was released on 1992 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: NOUS NOUS SOMMES INTERESSES A LA REALISATION D'ALLIAGES DE SURFACE, PAR IRRADIATION A L'AIDE D'UN LASER CO#2, D'ECHANTILLONS CONSTITUES: SOIT D'UN SUBSTRAT BASE ALUMINIUM, ET D'UN DEPOT DE 30 A 200 MICRONS DE NICKEL OU D'UN DEPOT D'ALLIAGE BASE COBALT; LE BUT EST L'AMELIORATION DES PROPRIETES MECANIQUES ET TRIBOLOGIQUES DE LA SURFACE, SOIT D'UN SUBSTRAT BASE CUIVRE ET D'UN DOUBLE DEPOT DE NICKEL (20-30 MICRONS) ET DE CHROME (1-5 MICRONS); DANS CE CAS LA FINALITE RECHERCHEE EST L'ACCROISSEMENT DES PROPRIETES MECANIQUES ET PHYSICOCHIMIQUES, C'EST-A-DIRE LA RESISTANCE A LA CORROSION. LE PRINCIPE ADOPTE CONSISTE A PORTER LA SURFACE DE L'ECHANTILLON AU-DELA DU POINT DE FUSION, POUR PROVOQUER L'INTERDIFFUSION, EN PHASE LIQUIDE, DES DIFFERENTS ELEMENTS CHIMIQUES EN PRESENCE. APRES UNE PHASE D'OPTIMISATION DES PARAMETRES EXPERIMENTAUX, DES ALLIAGES DE SURFACE SAINS ET HOMOGENES SONT OBTENUS, PUIS CARACTERISES; UNE CORRELATION EST ETABLIE ENTRE LA MICROSTRUCTURE ET LES PROPRIETES MECANIQUES OU PHYSICOCHIMIQUES. EN PARALLELE, NOUS AVONS DEVELOPPE UN MODELE DE TRANSFERT THERMIQUE DANS LES ECHANTILLONS BI-COUCHES. TROIS TYPES DE PARAMETRES ENTRENT EN JEU, LIES AU FAISCEAU LASER LUI-MEME, A L'INTERACTION LASER-MATERIAU ET MATERIAU PROPREMENT DIT (PROPRIETES THERMIQUES ET PHYSICOCHIMIQUES). UNE COMPARAISON AVEC LES RESULTATS EXPERIMENTAUX PERMET DE VALIDER CE MODELE, SEMI-QUANTITATIVEMENT
Download or read book Surface Engineering of Metals written by Tadeusz Burakowski and published by CRC Press. This book was released on 1998-12-23 with total page 612 pages. Available in PDF, EPUB and Kindle. Book excerpt: Surface Engineering of Metals provides basic definitions of classical and modern surface treatments, addressing mechanisms of formation, microstructure, and properties of surface layers. Part I outlines the fundamentals of surface engineering, presents the history of its development, and proposes a two-category classification of surface layers. Discussions include the basic potential and usable properties of superficial layers and coatings, explaining their concept, interaction with other properties, and the significance of these properties for proper selection and functioning. Part II provides an original classification of the production methods of surface layers. Discussions include the latest technologies in this field, characterized by directional or beam interaction of particles or of the heating medium with the treat surface.
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 Dictionary of Civil Engineering written by Jean-Paul Kurtz and published by Springer Science & Business Media. This book was released on 2004-09-14 with total page 1520 pages. Available in PDF, EPUB and Kindle. Book excerpt: I am pleased to present a work which marks a milestone in the history of public works and, more precisely, in that of permanent structures—a comprehensive dictionary of Civil Engineering terms. Since the beginning of time, Man has always tried to find a means to clear the obstacles which nature erected to displace him. With the first tree trunk thrown across a river, man sought to improve the crossing structure. After the invention of the wheel, and to satisfy his thirst for conquest (Roman ways), and comfort (aqueducts), man built bridges that became a preremptory necessity to move quickly. Thus, Man started to build wooden and masonry works. With the passing centuries, the builders became masters in the art of building masonry works. Then came the Industrial Revolution and the advent of the steel (1864), which was closely followed by the invention of the reinforced concrete (1855). The need for railways and improving the road network inspired great works of crossing such as viaducts and tunnels. The boom of the railway network and the development of the car required the construction of an increasing number of new structures. This phenomenon continues today with hundreds of structures built each year throughout the world.
Download or read book Laser Additive Manufacturing written by Milan Brandt and published by Woodhead Publishing. This book was released on 2016-09-01 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt: Laser Additive Manufacturing: Materials, Design, Technologies, and Applications provides the latest information on this highly efficient method of layer-based manufacturing using metals, plastics, or composite materials. The technology is particularly suitable for the production of complex components with high precision for a range of industries, including aerospace, automotive, and medical engineering. This book provides a comprehensive review of the technology and its range of applications. Part One looks at materials suitable for laser AM processes, with Part Two discussing design strategies for AM. Parts Three and Four review the most widely-used AM technique, powder bed fusion (PBF) and discuss other AM techniques, such as directed energy deposition, sheet lamination, jetting techniques, extrusion techniques, and vat photopolymerization. The final section explores the range of applications of laser AM. Provides a comprehensive one-volume overview of advances in laser additive manufacturing Presents detailed coverage of the latest techniques used for laser additive manufacturing Reviews both established and emerging areas of application
Download or read book ASM Handbook written by ASM International and published by . This book was released on 2003 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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.
Download or read book Introduction to Surface Engineering written by P. A. Dearnley and published by Cambridge University Press. This book was released on 2017-01-16 with total page 798 pages. Available in PDF, EPUB and Kindle. Book excerpt: This highly illustrated reference work covers the three principal types of surface technologies that best protect engineering devices and products: diffusion technologies, deposition technologies, and other less commonly acknowledged surface engineering (SE) techniques. Various applications are noted throughout the text and additionally whole chapters are devoted to specific SE applications across the automotive, gas turbine engine (GTE), metal machining, and biomedical implant sectors. Along with the benefits of SE, this volume also critically examines SE's limitations. Materials degradation pathways - those which can and those which cannot be mitigated by SE - are rigorously explained. Written from a scientific, materials engineering perspective, this concise text is supported by high-quality images and photo-micrographs which show how surfaces can be engineered to overcome the limits of conventionally produced materials, even in complex or hostile operating environments. This book is a useful resource for undergraduate and postgraduate students as well as professional 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:
