Author: J. Mark RobertsPublisher:
ISBN:
Category :
Languages : en
Pages : 170
Book Description
The Fabrication and Characterization of an Al2O3-whisker/tetragonal Zirconia Polycrystals Composite
Author: J. Mark RobertsFabrication and Characterization of Al2O3/SiC-whisker Composites
Author: Stanley M. SmithMicrostructure and Properties of Alumina-whisker-reinforced Tetragonal Zirconia Polycrystal Matrix Composites
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 17
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.
Ceramic Abstracts
Author: American Ceramic SocietyPublisher:
ISBN:
Category : Ceramics
Languages : en
Pages : 1000
Book Description
Scientific and Technical Aerospace Reports
Author: Engineered Materials Abstracts
Author: Modern Ceramic Engineering
Author: David W. RichersonPublisher: CRC Press
ISBN: 1498716938
Category : Technology & Engineering
Languages : en
Pages : 1140
Book Description
Since the publication of its Third Edition, there have been many notable advances in ceramic engineering. Modern Ceramic Engineering, Fourth Edition serves as an authoritative text and reference for both professionals and students seeking to understand key concepts of ceramics engineering by introducing the interrelationships among the structure, properties, processing, design concepts, and applications of advanced ceramics. Written in the same clear manner that made the previous editions so accessible, this latest edition has been expanded to include new information in almost every chapter, as well as two new chapters that present a variety of relevant case studies. The new edition now includes updated content on nanotechnology, the use of ceramics in integrated circuits, flash drives, and digital cameras, and the role of miniaturization that has made our modern digital devices possible, as well as information on electrochemical ceramics, updated discussions on LEDs, lasers and optical applications, and the role of ceramics in energy and pollution control technologies. It also highlights the increasing importance of modeling and simulation.
International Aerospace Abstracts
Author: Properties of a TZP/Al2O3 Composite After Long-Term Exposure at 1000 Deg C.
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 19
Book Description
A commercially available tetragonal zirconia polycrystal ceramic was examined for potential use in advanced engines. Room temperature strength and toughness were determined, as well as the static fatigue life between 800 deg C and 1200 deg C. All of these properties were determined before and after a 100 hour exposure at 1000 deg C. The room temperature flexure strength was 1838 MPa before exposure and it decreased 23% after exposure. The toughness did not change with the exposure. Static fatigue testing revealed that fracture below 1100 deg C was due to the cracks created during machining. At 1100 deg C and higher slow crack growth became the dominant failure mechanism. Overall, the high temperature static fatigue life is better than yttria tetragonal zirconia polycrystal materials without Alumina but it still does not meet the strength at temperature requirements for use in advanced engines.
Author: