Download or read book Influence du renforcement sur le comportement en fatigue statique et cyclique des c ramiques monolithiques de type alumine et zircone written by Hassan El Attaoui and published by . This book was released on 2003 with total page 143 pages. Available in PDF, EPUB and Kindle. Book excerpt: L'étude porte sur l'influence du renforcement (effet de courbe R) sur la fatigue des matériaux céramiques, nous avons choisi deux types de matériaux présentant les deux principaux mécanismes de renforcement intervenant dans les céramiques monolithiques : - l'alumine qui peut être renforcée par pontage dont l'importance dépend de la taille de grains, - une zircone stabilisée à l'oxyde de cérium CeO2 (Ce-TZP), pour laquelle la transformation de phase quadratique - monoclinique peut induire un renforcement important, suivant la composition. Dans un premier temps, les nuances présentant une résistance à la propagation de fissure ont été identifiées en déterminant les courbes R en flexion. Cela a été réalisé en utilisant des éprouvettes entaillées. Pour étudier le comportement en fatigue de l'alumine, des essais de chargement statique et cyclique combinés à des mesures de complaisance ont été réalisés sur des éprouvettes de double torsion. Les résultats montrent clairement une diminution de la résistance à la propagation de fissure pour la nuance à gros grains. Cela a pour effet de diminuer le facteur d'intensité de contrainte effectif en fond de fissure et par suite d'accélérer la propagation. Par ailleurs, l'utilisation de la fonction de complaisance introduite dans notre étude a permis de quantifier l'efficacité du pontage lors de la fatigue cyclique L'étude montre qu'au niveau du seuil de propagation de fissure, le pontage de la nuance à gros grains (la plus renforcée) est presque entièrement dégradé. Cela veut dire que l'effet bénéfique du renforcement, acquis lors d'un chargement monotone, est perdu en fatigue cyclique. Pour la zircone Ce-TZP, l'étude a montré que le renforcement est d'autant plus important que le taux d'oxyde de cérium est faible ou la taille de grain est grossière. Ceci entraîne un décalage des diagrammes V-KI vers les fortes valeurs de facteur d'intensité de contrainte. induisant une grande tolérance vis via des défauts. La dégradation des nuances 12Ce-TZP et 16Ce-TZP sous chargement cyclique a été mise en évidence. Nous avons observé une augmentation des vitesses de propagation de fissure et une diminution de la valeur du seuil en fatigue cyclique comparées à celles mesurées en fatigue statique. Il est donc certain que les cycles de chargement et de déchargement affectent les mécanismes de renforcement en entraînant une chute de la résistance à la propagation de fissure des 12Ce-TZP et 16Ce-TZP.
Download or read book Degradation of Implant Materials written by Noam Eliaz and published by Springer Science & Business Media. This book was released on 2012-08-21 with total page 521 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book reviews the current understanding of the mechanical, chemical and biological processes that are responsible for the degradation of a variety of implant materials. All 18 chapters will be written by internationally renowned experts to address both fundamental and practical aspects of research into the field. Different failure mechanisms such as corrosion, fatigue, and wear will be reviewed, together with experimental techniques for monitoring them, either in vitro or in vivo. Procedures for implant retrieval and analysis will be presented. A variety of biomaterials (stainless steels, titanium and its alloys, nitinol, magnesium alloys, polyethylene, biodegradable polymers, silicone gel, hydrogels, calcium phosphates) and medical devices (orthopedic and dental implants, stents, heart valves, breast implants) will be analyzed in detail. The book will serve as a broad reference source for graduate students and researchers studying biomedicine, corrosion, surface science, and electrochemistry.
Download or read book Advances in Ceramic Biomaterials written by Paola Palmero and published by Woodhead Publishing. This book was released on 2017-09-15 with total page 501 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bioceramics are an important class of biomaterials. Due to their desirable attributes such as biocompatibility and osseointegration, as well as their similarity in structure to bone and teeth, ceramic biomaterials have been successfully used in hard tissue applications. In this book, a team of materials research scientists, engineers, and clinicians bridge the gap between materials science and clinical commercialization providing integrated coverage of bioceramics, their applications and challenges. The book is divided into three parts. The first part is a review of classes of medical-grade ceramic materials, their synthesis and processing as well as methods of property assessment. The second part contains a review of ceramic medical products and devices developed, their evolution, their clinical applications and some of the lessons learned from decades of clinical use. The third part outlines the challenges to improve performance and the directions that novel approaches and advanced technologies are taking, to meet these challenges. With a focus on the dialogue between surgeons, engineers, material scientists, and biologists, this book is a valuable resource for researchers and engineers working toward long-lasting, reliable, customized biomedical ceramic and composites devices. - Edited by a team of experts with expertise in industry and academia - Compiles the most relevant aspects on regulatory issues, standards and engineering of bioceramic medical devices as inspired by commercial and clinical needs - Introduces bioceramics, their evolution and applications in hard tissue engineering and medical devices
Download or read book ETUDE DE LA RESISTANCE A LA PROPAGATION DE FISSURE DANS DES CERAMIQUES MONOLITHIQUES DE TYPE ALUMINE ET ZIRCONE written by MALIKA.. SAADAOUI and published by . This book was released on 1991 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: NOUS AVONS ETUDIE LA RESISTANCE A LA PROPAGATION DE FISSURE DE DEUX TYPES DE CERAMIQUES MONOLITHIQUES: UNE ALUMINE COMMERCIALE ET UNE ZIRCONE PARTIELLEMENT STABILISEE A LA MAGNESIE (MG-PSZ), CONSTITUEE D'UNE MATRICE CUBIQUE CONTENANT DES PRECIPITES DE PHASE TETRAGONALE ET MONOCLINIQUE. LES COURBES DE RESISTANCE A LA PROPAGATION DE FISSURE (COURBE R) DE CES MATERIAUX ONT ETE DETERMINEES DANS DIFFERENTES CONDITIONS D'ESSAI: ENVIRONNEMENT, VITESSE DE DEFORMATION, FORME DE LA PREFISSURE, TEMPERATURE (HAUTE ET BASSE TEMPERATURE). LES RESULTATS SONT DISCUTES PAR RAPPORT A LA MICROSTRUCTURE DES MATERIAUX ET AUX MECANISMES DE RENFORCEMENT MIS EN JEU: TRANSFORMATION DE PHASE, MICROFISSURATION OU PONTAGE DE FISSURE. UNE CORRELATION ENTRE L'INFLUENCE DES CONDITIONS D'ESSAI ET LA MICROSTRUCTURE A ETE MISE EN EVIDENCE AINSI QUE L'EFFET DE LA CROISSANCE SOUS CRITIQUE SUR LES COURBES R
Download or read book CONTRIBUTION A L ETUDE DU COMPORTEMENT MECANIQUE DE COMPOSITES CERAMIQUES RENFORCES PAR DISPERSION DE ZIRCONE written by GILLES.. ORANGE and published by . This book was released on 1992 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: LE COMPORTEMENT MECANIQUE DE COMPOSITES CERAMIQUES A RENFORT ZIRCONE A ETE ETUDIE EN RELATION AVEC LA MICROSTRUCTURE DE CES MATERIAUX. NOTRE ETUDE S'EST INTERESSEE A LA FOIS A DES MATERIAUX CONTENANT DES PARTICULES DISPERSEES (ALUMINE-ZIRCONE, MULLITE-ZIRCONE) ET A DES MATERIAUX CONSTITUES DE GRAINS OU PRECIPITES A L'ETAT METASTABLE (ZIRCONE PARTIELLEMENT STABILISEE, ZIRCONE TETRAGONALE). L'ETUDE S'EST APPUYEE D'UNE PART SUR L'ANALYSE DES MODELES THEORIQUES RELATIFS AUX MECANISMES DE RENFORCEMENT, D'AUTRE PART SUR LES RESULTATS OBTENUS A PARTIR D'UN APPAREILLAGE REALISE AU LABORATOIRE (MESURE DES CARACTERISTIQUES MECANIQUES, EN FONCTION DE LA TEMPERATURE), AINSI QUE DES CARACTERISATIONS MICROSTRUCTURALES. LES COMPOSITES ALUMINE-ZIRCONE ONT FAIT L'OBJET D'UNE ETUDE PARTICULIERE, QUI A ETE RENDUE POSSIBLE PAR LA MAITRISE DES CONDITIONS D'ELABORATION. LES PRINCIPAUX MECANISMES DE RENFORCEMENT OPERANT DANS LES CONDITIONS D'ESSAI ETUDIES (TYPE DE CONTRAINTE, TEMPERATURE) ONT PU ETRE DETERMINES: 1) TRANSFORMATION DE PHASE INDUITE SOUS CONTRAINTE DANS LES MATERIAUX TYPE ZIRCONE TETRAGONALE; 2) MECANISMES MULTIPLES (COMBINES) DANS LE SYSTEME ALUMINE-ZIRCONE: TRANSFORMATION DE PHASE, MICROFISSURATION, DEVIATION DE FISSURE. LA DEPENDANCE DU COMPORTEMENT MECANIQUE DES MATERIAUX COMPOSITES A DISPERSOIDES AVEC LES CARACTERISTIQUES DE LA PHASE DISPERSEE EST CLAIREMENT MISE EN EVIDENCE
Download or read book Bioceramics and their Clinical Applications written by Tadashi Kokubo and published by Elsevier. This book was released on 2008-03-25 with total page 785 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bioceramics have been used very successfully within the human body for many years. They are commonly used in orthopaedic surgery and dentistry but they are potentially suitable for a wide range of important applications within the medical device industry. This important book reviews the range of bioceramics, their properties and range of clinical uses.Chapters in the first section of the book discusses issues of significance to a range of bioceramics such as their structure, mechanical properties and biological interactions. The second part reviews the fabrication, microstructure and properties of specific bioceramics and glasses, concentrating on the most promising materials. These include alumina and zirconia ceramics, bioactive glasses and bioactive glass-ceramics, calcium sulphate, tricalcium phosphate-based ceramics, hydroxyapatite, tricalcium phosphate/hydroxyapatite biphasic ceramics, si-substrated hydroxyapatite, calcium phosphate cement, calcium phosphate coating, titania-based materials, ceramic-polymer composites, dental ceramics and dental glass-ceramics. The final group of chapters reviews the clinical applications of bioceramics in joint replacement, bone grafts, tissue engineering and dentistry.Bioceramics and their clinical applications is written by leading academics from around the world and it provides an authoritative review of this highly active area of research. This book is a useful resource for biomaterials scientists and engineers, as well as for clinicians and the academic community. - Provides an authoritative review of this highly active area of research - Discusses issues of significance of a range of bioceramics such as their structure, mechanical properties and biological interactions - Reviews the clinical applications of bioceramics in joint replacement, bone grafts, tissue engineering and dentistry
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 Glass Ceramic Technology written by Wolfram Holand and published by John Wiley & Sons. This book was released on 2012-06-08 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: Glass-ceramic materials share many properties with both glass and more traditional crystalline ceramics. This new edition examines the various types of glass-ceramic materials, the methods of their development, and their countless applications. With expanded sections on biomaterials and highly bioactive products (i.e., Bioglass and related glass ceramics), as well as the newest mechanisms for the development of dental ceramics and theories on the development of nano-scaled glass-ceramics, here is a must-have guide for ceramic and materials engineers, managers, and designers in the ceramic and glass industry.
Download or read book Transformation Toughening Of Ceramics written by David J. Green and published by CRC Press. This book was released on 2018-02-06 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: The aim of this book is to provide a coherent and up-to-date discussion of the scientific work concerning the transformation toughening of ceramics. We hope the book is useful to scientists, engineers and students who are new to these materials. It is intended both as a source of learning and information to those who are new to these materials. It is intended both as a source of learning behaviour and microstructural relationships in transformation-toughened ceramics. While it has been our aim to present a book that is current as possible at the time of publication, the subject is still expanding in many areas; so our hope is that the reader will also gain an insight into the direction of future advances.
Download or read book Fracture Mechanics of Ceramics written by R.C. Bradt and published by Springer. This book was released on 2005-07-29 with total page 636 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 8th International Symposium on fracture mechanics of ceramics was held in on the campus of the University of Houston, Houston, TX, USA, on February 25-28, 2003. With the natural maturing of the fields of structural ceramics, this symposium focused on nano-scale materials, composites, thin films and coatings as well as glass. The symposium also addressed new issues on fundamentals of fracture mechanics and contact mechanics, and a session on reliability and standardization.
Download or read book Corrosion and Degradation of Implant Materials written by B. C. Syrett and published by ASTM International. This book was released on 1979 with total page 358 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mechanical Properties of Ceramics written by John B. Wachtman and published by John Wiley & Sons. This book was released on 2009-08-13 with total page 496 pages. Available in PDF, EPUB and Kindle. Book excerpt: A Comprehensive and Self-Contained Treatment of the Theory and Practical Applications of Ceramic Materials When failure occurs in ceramic materials, it is often catastrophic, instantaneous, and total. Now in its Second Edition, this important book arms readers with a thorough and accurate understanding of the causes of these failures and how to design ceramics for failure avoidance. It systematically covers: Stress and strain Types of mechanical behavior Strength of defect-free solids Linear elastic fracture mechanics Measurements of elasticity, strength, and fracture toughness Subcritical crack propagation Toughening mechanisms in ceramics Effects of microstructure on toughness and strength Cyclic fatigue of ceramics Thermal stress and thermal shock in ceramics Fractography Dislocation and plastic deformation in ceramics Creep and superplasticity of ceramics Creep rupture at high temperatures and safe life design Hardness and wear And more While maintaining the first edition's reputation for being an indispensable professional resource, this new edition has been updated with sketches, explanations, figures, tables, summaries, and problem sets to make it more student-friendly as a textbook in undergraduate and graduate courses on the mechanical properties of ceramics.
Download or read book World Tribology Forum in Arthroplasty written by Claude Rieker and published by . This book was released on 2001 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ceramics written by Dietrich Munz and published by Springer Science & Business Media. This book was released on 2013-03-07 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book gives a description of the failure phenomena of ceramic materials under mechanical loading, the methods to determine their properties, and the principles for material selection. The book presents fracture mechanical and statistical principles and their application to describe the scatter of strength and lifetime, while special chapters are devoted to creep behaviour, multiaxial failure criteria and thermal shock behaviour. XXXXXXX Neuer Text Describing how ceramic materials fracture and fail under mechanical loading, this book provides methods for determining the properties of ceramics, and gives criteria for selecting ceramic materials for particular applications. It also examines the fracture-mechanical and statistical principles and their use in understanding the strength and durability of ceramics. Special chapters are devoted to creep behavior, criteria for multiaxial failure, and behavior under thermal shock. Readers will gain insight into the design of reliable ceramic components.
Download or read book Handbook of Spine Technology written by Boyle C. Cheng and published by Springer. This book was released on 2021-04-01 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This handbook is the most authoritative and up-to-date reference on spine technology written for practitioners, researchers, and students in bioengineering and clinical medicine. It is the first resource to provide a road map of both the history of the field and its future by documenting the poor clinical outcomes and failed spinal implants that contributed to problematic patient outcomes, as well as the technologies that are currently leading the way towards positive clinical outcomes. The contributors are leading authorities in the fields of engineering and clinical medicine and represent academia, industry, and international government and regulatory agencies. The chapters are split into five sections, with the first addressing clinical issues such as anatomy, pathology, oncology, trauma, diagnosis, and imaging studies. The second section, on biomechanics, delves into fixation devices, the bone implant interface, total disc replacements, injury mechanics, and more. The last three sections, on technology, are divided into materials, commercialized products, and surgery. All appropriate chapters will be continually updated and available on the publisher’s website, in order to keep this important reference as up-to-date as possible in a fast-moving field.
Download or read book Fracture of Brittle Solids written by Brian R. Lawn and published by Cambridge University Press. This book was released on 1993-06-03 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a monograph on the brittle fracture of ceramic materials, in a unified continuum, microstructural and atomistic treatment.
Download or read book New Contributions to R curves and Bridging Stresses Applications of Weight Functions written by Theo Fett and published by . This book was released on 2012 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
