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Effect of hydrogen on the strength and microstructure of selected ceramicsCeramics in monolithic form and as composite constituents in the form of fibers, matrices, and coatings are currently being considered for a variety of high-temperature applications in aeronautics and space. Many of these applications involve exposure to a hydrogen-containing environment. The compatibility of selected ceramics in gaseous high-temperature hydrogen is assessed. Environmental stability regimes for the long term use of ceramic materials are defined by the parameters of temperature, pressure, and moisture content. Thermodynamically predicted reactions between hydrogen and several monolithic ceramics are compared with actual performance in a controlled environment. Morphology of hydrogen attack and the corresponding strength degradation is reported for silicon carbide, silicon nitride, alumina, magnesia, and mullite.
Document ID
19910005169
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Herbell, Thomas P.
(NASA Lewis Research Center Cleveland, OH., United States)
Eckel, Andrew J.
(NASA Lewis Research Center Cleveland, OH., United States)
Hull, David R.
(NASA Lewis Research Center Cleveland, OH., United States)
Misra, Ajay K.
(Sverdrup Technology, Inc., Brook Park OH., United States)
Date Acquired
September 6, 2013
Publication Date
January 1, 1990
Subject Category
Nonmetallic Materials
Report/Patent Number
E-5702
NAS 1.15:103674
NASA-TM-103674
Meeting Information
Meeting: Fall Meeting of the Metallurgical Society
Location: Detroit, MI
Country: United States
Start Date: October 7, 1990
End Date: October 11, 1990
Accession Number
91N14482
Funding Number(s)
PROJECT: RTOP 582-01-11
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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