Author: James C. Marra
Publisher:
ISBN:
Category : Ceramics
Languages : en
Pages : 278

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Book Description

Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 25

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Book Description
Seven commercially available yttria-tetragonal zirconia polycrystal (Y-TZP) materials were evaluated. Room temperature properties were measured before and after heat treatments at 1000C. Microstructure and phase stability were also examined. In all but one case, the Y-TZPs showed very little change in room temperature properties after long times at this temperature. Results show that pressure-assisted processing greatly improves the strength by reducing porosity and keeping the grain size extremely fine, but this reduces the toughness because finer grains are more difficult to transform. In addition, a small amount of cubic zirconia appears to enhance the toughness of fine-grained Y-TZP while maintaining good strength. During processing, a small amount of cubic zirconia is formed and allowed to grow. This creates regions poor in yttria which can transform spontaneously in the presence of a crack-tip stress field.

Author: Bikramjit Basu
Publisher: John Wiley & Sons
ISBN: 9781118037294
Category : Technology & Engineering
Languages : en
Pages : 504

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Book Description
This book covers the area of advanced ceramic composites broadly, providing important introductory chapters to fundamentals, processing, and applications of advanced ceramic composites. Within each section, specific topics covered highlight the state of the art research within one of the above sections. The organization of the book is designed to provide easy understanding by students as well as professionals interested in advanced ceramic composites. The various sections discuss fundamentals of nature and characteristics of ceramics, processing of ceramics, processing and properties of toughened ceramics, high temperature ceramics, nanoceramics and nanoceramic composites, and bioceramics and biocomposites.

Author: Jeffrey J. Swab
Publisher:
ISBN:
Category :
Languages : en
Pages : 28

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Book Description
Due to an unusual combination of high strength and toughness, tetragonal zirconia polycrystal (TZP) materials are candidates for use in advanced heat engines. The properties of these materials stem from the stress-assisted transformation of metastable tetragonal zirconia particles. However, after long times at elevated temperatures, this class of materials is susceptible to properties degradation due to the undesirable transformation of tetragonal zirconia to monoclinic zirconia upon cooling. Accordingly, a task was initiated to examine the extent and magnitude of this phenomenon's effect on the properties. Seven commercially available yttria-tetragonal polycrystal (Y-TZP) materials were evaluated. Room temperature properties were measured before and after heat treatments at 1000 C. Microstructure and phase stability were also examined. In all but one case, the Y-TZPs showed very little change in room temperature properties after long times at this temperature. Keywords: Ceramic materials, Zirconia, Zirconium compounds, Heat engines, Mechanical properties, High temperature, High strength. (jes).

Author:
Publisher:
ISBN:
Category : Ceramic materials
Languages : en
Pages : 664

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Book Description

Author: American Ceramic Society
Publisher:
ISBN:
Category : Ceramics
Languages : en
Pages : 1000

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Book Description

Author: Kevin Healy
Publisher: Elsevier
ISBN: 0081006926
Category : Technology & Engineering
Languages : en
Pages : 4865

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Book Description
Comprehensive Biomaterials II, Second Edition, Seven Volume Set brings together the myriad facets of biomaterials into one expertly-written series of edited volumes. Articles address the current status of nearly all biomaterials in the field, their strengths and weaknesses, their future prospects, appropriate analytical methods and testing, device applications and performance, emerging candidate materials as competitors and disruptive technologies, research and development, regulatory management, commercial aspects, and applications, including medical applications. Detailed coverage is given to both new and emerging areas and the latest research in more traditional areas of the field. Particular attention is given to those areas in which major recent developments have taken place. This new edition, with 75% new or updated articles, will provide biomedical scientists in industry, government, academia, and research organizations with an accurate perspective on the field in a manner that is both accessible and thorough. Reviews the current status of nearly all biomaterials in the field by analyzing their strengths and weaknesses, performance, and future prospects Covers all significant emerging technologies in areas such as 3D printing of tissues, organs and scaffolds, cell encapsulation; multimodal delivery, cancer/vaccine - biomaterial applications, neural interface understanding, materials used for in situ imaging, and infection prevention and treatment Effectively describes the many modern aspects of biomaterials from basic science, to clinical applications

Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 17

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Book Description
With the increasing demand of today's technology, there is a growing need for high temperature materials with improved fracture toughness. Whisker-reinforced ceramic composites are materials with potentially high fracture toughness. Many whisker-matrix systems are possible, but the choices for toughened composites are limited by such considerations as chemical compatibility and thermal expansion mismatch. In view of the high fracture toughness of tetragonal zirconia polycrystals (TZP) matrix, many investigators have successfully attempted to improve the mechanical properties of yttria stabilized tetragonal zirconia polycrystals (Y-TZP) with the addition of strong, single crystal SiC whiskers. The primary objective of this work was to place Al2O3 whiskers into an Y-TZP matrix and study the toughening effects on the new composite. This particular system was chosen because of the high strength and reasonably high toughness inherent within Y-TZP and potentially high strength obtainable within a single crystal alumina. This, combined with an agreeable thermal expansion mismatch, could theoretically produce a composite of exceptionally high toughness. 14 refs., 7 figs.

Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 934

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Book Description

Author: Tatsuki Ohji
Publisher: John Wiley & Sons
ISBN: 9780470456217
Category : Technology & Engineering
Languages : en
Pages : 249

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Book Description
This volume provides a one-stop resource, compiling current research on advanced processing and manufacturing technologies for structural and multifunctional materials. It is a collection of papers from The American Ceramic Society s 32nd International Conference on Advanced Ceramics and Composites, January 27-February 1, 2008. Topics include advanced processing and manufacturing technologies for a wide variety of non-oxide and oxide based structural ceramics, ultra-high temperature ceramics and composites, particulate and fiber reinforced composites, and multifunctional materials. This is a valuable, up-to-date resource for researchers in the field.