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Corrosion Performance of Ceramic Materials in Slagging Environments

Corrosion Performance of Ceramic Materials in Slagging Environments
Author:
Publisher:
Total Pages: 16
Release: 1996
Genre:
ISBN:

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Conceptual designs of advanced combustion systems that use coal as feedstock require high-temperature furnaces and heat transfer surfaces that can operate at temperatures much higher than in current coal-fired power plants. Combination of elevated temperatures and hostile combustion environments requires advanced ceramics. Objectives of this program are to evaluate the (a) chemistry of gaseous and condensed products arising during coal combustion, (b) corrosion behavior of candidate materials in air, slag, and salt environments, and (c)residual mechanical properties of the materials after corrosion. Temperatures in the range of 1000-1400 C for ceramics and 600-1000 C for metallic alloys are emphasized. Coal/ash chemistries developed on the basis of thermodynamic/kinetic calculations, together with slags from actual combustors, are used. Materials being evaluated include monolithic Si carbides from several sources: Si nitride, Si carbide in alumina composites, Si carbide fibers in a Si carbide-matrix composite, and some advanced Ni-base alloys. This paper presents results from an ongoing program on corrosion performance of candidate ceramic materials exposed to air, salt, and slag environments and their effect on flexural strength and energy absorbed during fracture of these materials. 10 figs, 4 tabs, 8 refs.


Ceramics in Severe Environments

Ceramics in Severe Environments
Author: Wurth W. Kriegel
Publisher: Springer Science & Business Media
Total Pages: 621
Release: 2012-12-06
Genre: Technology & Engineering
ISBN: 1468431412

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Corrosion of High-Performance Ceramics

Corrosion of High-Performance Ceramics
Author: Yury G. Gogotsi
Publisher: Springer Science & Business Media
Total Pages: 192
Release: 2012-12-06
Genre: Science
ISBN: 3642773907

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"Corrosion of High-Performance Ceramics" is a comprehensive survey of the state of the art of this new field of research. It presents the first generalized description of the corrosion of engineering ceramics and its effect on their mechanical properties (based on Si3N4, SiC, AlN, B4C, BN, Al2O3, ZrO2). Researchers, engineers and graduate students are provided with a guide to the performance of non-oxide and oxide ceramicsin corrosive environments. Keywords: high-temperature oxidation; hot corrosion; corrosion in acids, alkalis and molten salts; effects of corrosion on the physico-mechanical properties of ceramics; stress corrosion; corrosion protection; development of oxidation-resistant ceramics; role of purity, donations and microstructure.


Corrosion and Its Effect on Mechanical Properties of Materials for Advanced Combustion Systems

Corrosion and Its Effect on Mechanical Properties of Materials for Advanced Combustion Systems
Author:
Publisher:
Total Pages: 13
Release: 1996
Genre:
ISBN:

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Conceptual designs of advanced combustion systems that utilize coal as a feedstock require high-temperature furnaces and heat transfer surfaces that can operate at temperatures much higher than those prevalent in current coal-fired power plants. The combination of elevated temperatures and hostile combustion environments necessitates development and application of advanced ceramic materials in these designs. The objectives of the present program are to evaluate (a) the chemistry of gaseous and condensed products that arise during combustion of coal; (b) the corrosion behavior of candidate materials in air, slag and salt environments for application in the combustion environments; and (c) the residual mechanical properties of the materials after corrosion. The program emphasizes temperatures in the range of 1000-1400°C for ceramic materials and 600-1000°C for metallic alloys. Coal/ash chemistries developed on the basis of thermodynamic/kinetic calculations, together with slags from actual combustors, are used in the program. The materials being evaluated include monolithic silicon carbide from several sources: silicon, nitride, silicon carbide in alumina composites, silicon carbide fibers in a silicon carbide- matrix composite, and some advanced nickel-base alloys. The paper presents results from an ongoing program on corrosion performance of candidate ceramic materials exposed to air, salt and slag environments and their affect on flexural strength and energy absorbed during fracture of these materials.


Corrosion of Ceramic and Composite Materials, Second Edition

Corrosion of Ceramic and Composite Materials, Second Edition
Author: Ronald A. McCauley
Publisher: CRC Press
Total Pages: 432
Release: 2004-06-23
Genre: Mathematics
ISBN: 9780824753665

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Corrosion of Ceramic and Composite Materials, Second Edition is a primary source of guidance for the assessment, interpretation, and inhibition of corrosion phenomena. This book discusses all aspects of corrosion of ceramics, including environments, mechanisms, and materials, and the means to minimize or eliminate corrosion. The author compiles key findings and literature highlights from nearly a decade of scientific advancement, covering emerging techniques in corrosion analysis, characterization, and prediction. He provides at-a-glance coverage of national and international testing procedures for the evaluation of materials stability. The book covers the fundamentals of corrosion by gases, liquids, and solids of several ceramic materials including crystalline materials, glasses, composites, bioceramics, and advanced ceramics. It also discusses property/corrosion relationships and testing. The book collects a generous number of models, figures, and studies illustrating techniques to minimize and reduce the effects of various mechanisms contributing to the corrosion of civil, aerospace, and military structures. The second edition includes a review of all the current literature since publication of the first edition, an additional chapter on composites, and major sections added on bioceramics and weathering of construction materials. Corrosion of Ceramic and Composite Materials, Second Edition explains existing corrosion problems and offers an excellent guide to the design and development of corrosion-resistant structures.


Mechanical Properties and Performance of Engineering Ceramics and Composites III, Volume 28, Issue 2

Mechanical Properties and Performance of Engineering Ceramics and Composites III, Volume 28, Issue 2
Author: Edgar Lara-Curzio
Publisher: John Wiley & Sons
Total Pages: 532
Release: 2007-11-12
Genre: Technology & Engineering
ISBN: 0470196335

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Papers from The American Ceramic Society's 31st International Conference on Advanced Ceramics and Composites, held in Daytona Beach, Florida, January 21-26, 2007. Content includes fundamental links among processing, microstructure, properties and performance of ceramics and composites, and how these change as a function of time, temperature and environment. Reviews progress on ternary compounds, ultra-high temperature ceramics, innovative processing techniques to achieve multifunctional properties and materials for power generation and nuclear energy applications.