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Evaluation of Ultra-High Temperature Ceramics for Aeropropulsion UseAmong the ultra-high temperature ceramics (UHTC) are a group of materials consisting of zirconium diboride or hafnium diboride plus silicon carbide, and in some instances, carbon. These materials offer a good combination of properties that make them candidates for airframe leading edges on sharp-bodied reentry vehicles. These UHTC perform well in the environment for such applications, i.e., air at low pressure. The purpose of this study was to examine three of these materials under conditions more representative of a propulsion environment, i.e., higher oxygen partial pressure and total pressure. Results of strength and fracture toughness measurements, furnace oxidation and high velocity thermal shock exposures are presented for ZrB2 plus 20 volume % SiC, ZrB2 plus 14 volume % SiC plus 30 volume % C, and SCS-9a SiC fiber reinforced ZrB2 plus 20 volume % SiC. The poor oxidation resistance of UHTCs is the predominant factor limiting their applicability to propulsion applications.
Document ID
20020024745
Acquisition Source
Glenn Research Center
Document Type
Preprint (Draft being sent to journal)
Authors
Levine, Stanley R.
(NASA Glenn Research Center Cleveland, OH United States)
Opila, Elizabeth J.
(NASA Glenn Research Center Cleveland, OH United States)
Halbig, Michael C.
(NASA Glenn Research Center Cleveland, OH United States)
Kiser, James D.
(NASA Glenn Research Center Cleveland, OH United States)
Singh, Mrityunjay
(NASA Glenn Research Center Cleveland, OH United States)
Salem, Jonathan A.
(NASA Glenn Research Center Cleveland, OH United States)
Date Acquired
September 7, 2013
Publication Date
January 1, 2001
Subject Category
Mechanical Engineering
Meeting Information
Meeting: Structural Ceramics and Ceramic Composites for High-Temperature Applications EuroConference
Location: Seville
Country: Spain
Start Date: October 7, 2001
End Date: October 12, 2001
Sponsors: United Engineering Foundation, Inc.
Funding Number(s)
PROJECT: RTOP 274-00-SR
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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