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Oxidation of Ultra-High Temperature Ceramics in Water VaporUltra High Temperature Ceramics (UHTCs) including HfB2 + 20% SiC (HS), and ZrB2 + 20% SiC (ZC), and ZrB2 + 30% C + 14% SiC (ZCS) have been investigated for use as potential aeropropolsion engine materials. These materials were oxidized in water vapor (90%) using a cyclic vertical furnace at 1 atm. The total exposure time was 10 hours at temperature of 1200, 1300, and 1400 C. CVD SiC was also evaluate as a baseline for comparison. Weight change, X-ray diffraction analysis, surface and cross-sectional SEM and EDS were performed. These results are compared with tests conducted in a stagnant air furnace at temperatures of 1327 C for 100 minutes, and with high pressure burner rig (HPBR) results at 1100 and 1300 C at 6 atm for 50 h. Total recession measurements are also reported for the two tests environments.
Document ID
20040046148
Acquisition Source
Glenn Research Center
Document Type
Preprint (Draft being sent to journal)
Authors
Nguyen, QuynGiao N.
(NASA Glenn Research Center Cleveland, OH, United States)
Robinson, Raymond C.
(QSS Group, Inc. Cleveland, OH, United States)
Opila, Elizabeth J.
(NASA Glenn Research Center Cleveland, OH, United States)
Date Acquired
August 21, 2013
Publication Date
January 1, 2004
Subject Category
Composite Materials
Meeting Information
Meeting: 227th American Chemical Society National Meeting
Location: Anaheim, CA
Country: United States
Start Date: March 28, 2004
End Date: April 1, 2004
Sponsors: American Chemical Society
Funding Number(s)
WBS: WBS 22-714-20-09
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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