The evaluation of environmental effects in toughened ceramics for advanced heat engines investigation of selected SiC and Si sub 3 N sub 4 ceramics

Technical Report · Wed Aug 01 00:00:00 EDT 1990

DOI:https://doi.org/10.2172/6412493· OSTI ID:6412493

Hecht, N L; Graves, G A; McCullum, D E; Berens, A P; Goodrich, S; Wolf, J D; Hoenigman, J R; Yaney, P; Grant, D; Hilton, S ^[1]

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1. Dayton Univ., OH (USA). Research Inst.

The primary focus of this project is an investigation of the effects of environment on the mechanical behavior of commercially available ceramic materials being considered for use in heat engines. Based on results from an earlier study, three materials, two Si{sub 3}N{sub 4} and one SiC, were selected for further characterization and evaluation. Microstructure, chemistry, physical characteristics, and mechanical properties at 25{degree}C and 1450{degree}C were investigated. 25 refs., 32 figs., 27 tabs.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Dayton Univ., OH (USA). Research Inst.
• Sponsoring Organization: DOE/CE
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 6412493
• Report Number(s): ORNL/Sub-84-00221/2; ON: DE91005638
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
36 MATERIALS SCIENCE
SILICON CARBIDES
MECHANICAL PROPERTIES
SILICON NITRIDES
CRACK PROPAGATION
FLEXURAL STRENGTH
FRACTURE PROPERTIES
HEAT ENGINES
MICROSTRUCTURE
PROGRESS REPORT
THERMAL EXPANSION
X-RAY DIFFRACTION
YOUNG MODULUS
CARBIDES
CARBON COMPOUNDS
COHERENT SCATTERING
CRYSTAL STRUCTURE
DIFFRACTION
DOCUMENT TYPES
ENGINES
EXPANSION
NITRIDES
NITROGEN COMPOUNDS
PNICTIDES
SCATTERING
SILICON COMPOUNDS
330603* - Vehicle Design Factors- Engine System
360203 - Ceramics
Cermets
& Refractories- Mechanical Properties