Durability of silica-protected ceramics in combustion atmospheres

Conference · Fri Dec 01 00:00:00 EST 1995

OSTI ID:135752

Jacobson, N S; Smialek, J L; Fox, D S ^[1]; Opila, E J ^[2]

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1. NASA Lewis Research Center, Cleveland, OH (United States)
2. Cleveland State Univ., OH (United States)

Silicon-based ceramics and composites are unstable air and rely on a thin silica film for protection. Limited interaction of these materials with their operating environment is essential. This paper is divided into two parts: (I) External effects dealing with the stability of the silica film and (II) Internal effects dealing with attack of oxygen on internal components such as the fiber and fiber coating. These are shown schematically in Figure 1. Most of the emphasis is on a SiC fiber reinforced SiC matrix, however the conclusions apply to other silica protected materials such as Si{sub 3}N{sub 4} and MoSi{sub 2}.

• OSTI ID: 135752
• Report Number(s): CONF-9508127-; TRN: 95:006889-0015
• Resource Relation: Conference: 2. international conference on high temperature ceramic matrix composites, Santa Barbara, CA (United States), 21-25 Aug 1995; Other Information: PBD: 1995; Related Information: Is Part Of Ceramic transactions: High-temperature ceramic-matrix composites I: Design, durability, and performance. Volume 57; Evans, A.G.; Naslain, R. [eds.]; PB: 517 p.
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
SILICON NITRIDES
CORROSION
OXIDATION
MOLYBDENUM SILICIDES
SILICON CARBIDES
AIR
CERAMICS
COMBUSTION
SILICA
STABILITY
THIN FILMS
PROTECTIVE COATINGS
TEMPERATURE DEPENDENCE
MICROSTRUCTURE