NDLI: Electrical resistance technique to monitor sic composite detection

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Electrical resistance technique to monitor sic composite detection

Content Provider	NASA Technical Reports Server (NTRS)
Author	Xia, Zhenhai Smith, Craig Morscher, Gregory
Copyright Year	2008
Description	Ceramic matrix composites are suitable for high temperature structural applications such as turbine airfoils and hypersonic thermal protection systems. The employment of these materials in such applications is limited by the ability to process components reliable and to accurately monitor and predict damage evolution that leads to failure under stressed-oxidation conditions. Current nondestructive methods such as ultrasound, x-ray, and thermal imaging are limited in their ability to quantify small scale, transverse, in-plane, matrix cracks developed over long-time creep and fatigue conditions. Electrical resistance of SiC/SiC composites is one technique that shows special promise towards this end. Since both the matrix and the fibers are conductive, changes in matrix or fiber properties should relate to changes in electrical conductivity along the length of a specimen or part. The effect of matrix cracking on electrical resistivity for several composite systems will be presented and some initial measurements performed at elevated temperatures under stress-rupture conditions. The implications towards electrical resistance as a technique applied to composite processing, damage detection (health monitoring), and life-modeling will be discussed.
File Size	1036434
Page Count	24
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20090008400
Archival Resource Key	ark:/13960/t86h9j693
Language	English
Publisher Date	2008-10-07
Access Restriction	Open
Subject Keyword	Composite Materials Ceramic Matrix Composites Creep Properties Electrical Resistance Oxidation High Temperature Matrix Materials Ultrasonics Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Presentation

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