The Properties of Hydroxyapatite and Titanium Oxide Coatings Obtained by Suspension Plasma Spraying PDF Download
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Author: Roman Jaworski
Publisher:
ISBN:
Category :
Languages : en
Pages : 46
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Book Description
La thèse est consacrée, d'abord, au développement de la technologie de la projection plasma de suspension de matériaux céramiques : l'hydroxyapatite et l'oxyde de titane et, ensuite, à la caractérisation de propriétés de dépôts obtenus. Le développement de la technologie inclut l'optimisation de la formulation de poudre initiales et notamment la synthèse de l'hydroxyapatite pure. Le plan d'expérience était utilisé pour optimiser cette synthèse. Les suspensions de poudres qui ont été formulées à l'aide de l'eau, de l'alcool et de leurs mélanges sont par la suite injectées à l'aide de différents types d'injecteurs dans le jet du plasma à l'arc. La microstructure des dépôts obtenus a été caractérisée à l'aide de microscope électronique à transmission et à balayage. La microsonde électronique et la spectroscopie de Raman ont permis d'obtenir les profils de la composition chimique et notamment le rapport de Ca/P à l'intérieur de dépôts de l'hydroxyapatite le site riche en rutile et anatase respectivement. La diffraction par rayons X a permis de trouver les phases de décomposition de l'hydroxyapatite ainsi que le contenu de rutile et d'anatase dans ces dépôts. La composition de phases était liée par les équations de régression avec les paramètres opérationnels du procédé de la projection. Finalement, les propriétés électriques de dépôts en hydroxyapatite ont été testées à l'aide de la spectroscopie d'impédance et les propriétés mécaniques de dépôts d'oxyde de titane ont été testées à l'aide de test de rayure.
Author: Roman Jaworski
Publisher:
ISBN:
Category :
Languages : en
Pages : 46
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Book Description
La thèse est consacrée, d'abord, au développement de la technologie de la projection plasma de suspension de matériaux céramiques : l'hydroxyapatite et l'oxyde de titane et, ensuite, à la caractérisation de propriétés de dépôts obtenus. Le développement de la technologie inclut l'optimisation de la formulation de poudre initiales et notamment la synthèse de l'hydroxyapatite pure. Le plan d'expérience était utilisé pour optimiser cette synthèse. Les suspensions de poudres qui ont été formulées à l'aide de l'eau, de l'alcool et de leurs mélanges sont par la suite injectées à l'aide de différents types d'injecteurs dans le jet du plasma à l'arc. La microstructure des dépôts obtenus a été caractérisée à l'aide de microscope électronique à transmission et à balayage. La microsonde électronique et la spectroscopie de Raman ont permis d'obtenir les profils de la composition chimique et notamment le rapport de Ca/P à l'intérieur de dépôts de l'hydroxyapatite le site riche en rutile et anatase respectivement. La diffraction par rayons X a permis de trouver les phases de décomposition de l'hydroxyapatite ainsi que le contenu de rutile et d'anatase dans ces dépôts. La composition de phases était liée par les équations de régression avec les paramètres opérationnels du procédé de la projection. Finalement, les propriétés électriques de dépôts en hydroxyapatite ont été testées à l'aide de la spectroscopie d'impédance et les propriétés mécaniques de dépôts d'oxyde de titane ont été testées à l'aide de test de rayure.
Author: Robert B. Heimann
Publisher: John Wiley & Sons
ISBN: 3527614842
Category : Technology & Engineering
Languages : en
Pages : 354
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Book Description
Over the past two decades, thermal spraying of metallic, ceramic and composite coatings has emerged as a powerful tool for surface engineering, with many new applications and markets continually being developed. This book will help materials scientists and engineers to choose the most appropriate combination of materials, equipment, and operation parameters for the design of high-performance coatings with new functional properties and improved service life. Includes: * a thorough treatment of the fundamental physical processes governing plasma spray technology; * a critical assessment of advantages and disadvantages of the method compared with other suface coating techniques; * a discussion of basic equipment requirements and limitations; * case studies and typical applications to solve industrial problems. Plasma-Spray Coating offers a stimulating combination of basic concepts and practical applications. Materials scientists and engineers, as well as graduate students will find this book of enormous value.
Author: Rafal Tomaszek
Publisher:
ISBN:
Category :
Languages : en
Pages : 12
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Book Description
The thesis aims at development of titanium oxide and hydroxyapatite coatings with the use of suspension plasma spraying. This new technique enables obtaining the coatings with very fine crystal grains being smaller than 100 nm (nanostructured). To attain this objective, two type of suspension feeder were developed: (i) with a pressurized vessel and, (ii) with two peristaltic pumps. The suspension were formulated using very fine pigment, surfactant and distilled water. The spraying process was optimized to obtain continuous coatings having thickness ranging from 5 to 25 μm. The coatings microstructure was tested using X-ray photelectrons spectroscopy, Raman spectroscopy, Xray diffraction, optical and scanning electron microscope. Electron emission from the surface of titania sprayed coatings was also tested and explained by the microstructure. This coating were prepared with a gradient of crystal grain size by spraying initially coarse powder deposit and, on the top, suspension sprayed one: Hydroxyapatite deposits were sprayed staring from suspension formulated from crushing of spray-dried powder. This coatings were realized using a gradient of chemical composition by simultaneous deposition of titania suspension. Titania coatings were chosen in order to improve adhesion to metallic titanium substrate.
Author: Maher I. Boulos
Publisher: Springer Nature
ISBN: 3030706729
Category : Technology & Engineering
Languages : en
Pages : 1147
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Book Description
This fully revised, industry-standard resource offers practical details on every aspect of the fundamentals necessary for understanding thermal spray technology, from powder all the way to the final part. The second edition is presented in a reader-friendly format that is split into four parts. Part I presents a review of thermal spray coating and its position in the broad field of surface modification technologies. Highlights of combustion and thermal plasmas are given with an expanded treatment of in-flight plasma-particle interactions. The second and third parts deal respectively with an updated presentation of thermal spray technologies and coating formation, including solution and suspension plasma spraying. The last part of the book includes a comparative analysis of different thermal spray processes, which is essential for the optimal selection of the appropriate thermal spray process in a given application. Coverage of system integration has been expanded with the addition of a detailed discussion of online instrumentation and process diagnostics and numerous examples of industrial scale spray booth designs. Attention is also given to coating finishing and health and safety issues. An extensive review is presented of thermal spray applications grouped in terms of process objectives and present use in different industrial sectors. This book will serve as an invaluable resource as a textbook for graduate courses in the field and as an exhaustive reference for professionals involved in the thermal spray field.
Author: Pierre L. Fauchais
Publisher: Springer Science & Business Media
ISBN: 0387689915
Category : Technology & Engineering
Languages : en
Pages : 1587
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Book Description
This book provides readers with the fundamentals necessary for understanding thermal spray technology. Coverage includes in-depth discussions of various thermal spray processes, feedstock materials, particle-jet interactions, and associated yet very critical topics: diagnostics, current and emerging applications, surface science, and pre and post-treatment. This book will serve as an invaluable resource as a textbook for graduate courses in the field and as an exhaustive reference for professionals involved in thermal spray technology.
Author: Robert B. Heimann
Publisher: John Wiley & Sons
ISBN: 3527337431
Category : Technology & Engineering
Languages : en
Pages : 493
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Book Description
Reflecting the progress in recent years, this book provides in-depth information on the preparation, chemistry, and engineering of bioceramic coatings for medical implants. It is authored by two renowned experts with over 30 years of experience in industry and academia, who know the potentials and pitfalls of the techniques concerned. Following an introduction to the principles of biocompatibility, they present the structures and properties of various bioceramics from alumina to zirconia. The main part of the work focuses on coating technologies, such as chemical vapor deposition, sol-gel deposition and thermal spraying. There then follows a discussion of the major interactions of bioceramics with bone or tissue cells, complemented by an overview of the in-vitro testing methods of the biomineralization properties of bioceramics. The text is rounded off by chapters on the functionalization of bioceramic coatings and a look at future trends. As a result, the authors bring together all aspects of the latest techniques for designing, depositing, testing, and implementing improved and novel bioceramic coating compositions, providing a full yet concise overview for beginners and professionals.
Author: Arjun Dey
Publisher: CRC Press
ISBN: 1482250942
Category : Technology & Engineering
Languages : en
Pages : 272
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Book Description
There has been enormous growth in the use of medical implants. However, in the case of hip replacement, loosening of metallic prosthesis fixed with polymethylmethylacrylate bone cement has resulted in painstaking revision surgery, which is a major problem for the patient, surgeon, and biomedical technology itself. In fact, global recognition of thi
Author: Alberto D'Amore
Publisher: CRC Press
ISBN: 9047425715
Category : Science
Languages : en
Pages : 434
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Book Description
This volume collects selected papers presented and discussed during the 9th National Conference organized by the Italian Association of Materials Engineering, AIMAT from 2008 at Piano di Sorrento (Napoli, Italy). It gives a valuable representation of highlights of the research and development activities running in 21 Italian universities and resear
Author: Marta Mohedano
Publisher: MDPI
ISBN: 3036505520
Category : Science
Languages : en
Pages : 172
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Book Description
Plasma electrolytic oxidation (PEO), also known as micro-arc oxidation (MAO), functionalizes surfaces, improving the mechanical, thermal, and corrosion performance of metallic substrates, along with other tailored properties (e.g., biocompatibility, catalysis, antibacterial response, self-lubrication, etc.). The extensive field of applications of this technique ranges from structural components, in particular, in the transport sector, to more advanced fields, such as bioengineering. The present Special Issue covers the latest advances in PEO‐coated light alloys for structural (Al, Mg) and biomedical applications (Ti, Mg), with 10 research papers and 1 review from leading research groups around the world.
Author: Mike Driver
Publisher: Elsevier
ISBN: 0857093673
Category : Science
Languages : en
Pages : 381
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Book Description
The biomaterials sector is rapidly expanding and significant advances have been made in the technology of biomedical coatings and materials, which provide a means to improve the wear of joints, change the biological interaction between implant and host and combine the properties of various materials to improve device performance. Coatings for biomedical applications provides an extensive review of coating types and surface modifications for biomedical applications.The first part of the book explores a range of coating types and their biomedical applications. Chapters look at hydrophilic, mineral and pyrolytic carbon coatings in and ex vivo orthopaedic applications and finally at surface modification and preparation techniques. Part two presents case studies of orthopaedic and ophthalmic coatings, and biomedical applications including vascular stents, cardiopulomonary by-pass equipment and ventricular assist devices.With its clear structure and comprehensive review of research, Coatings for biomedical applications is a valuable resource to researchers, scientists and engineers in the biomedical industry. It will also benefit anyone studying or working within the biomedical sector, particularly those specialising in biomedical coatings. - Provides an extensive review of coating types and surface modifications for biomedical applications - Chapters look at hydrophilic coatings for biomedical applications in and ex vivo, mineral coatings for orthopaedic applications, pyrolytic carbon coating and other commonly-used biomedical coatings - Presents case studies of orthopaedic and ophthalmic coatings, and biomedical applications including vascular stents, cardiopulomonary by-pass equipment and ventricular assist devices
