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Electrical resistance as a nde technique to monitor processing and damage accumulation in sic/sic composites
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Xia, Zhenhai Smith, Craig Morscher, Gregory N. |
| 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. Initial efforts to quantify the electrical resistance of different fiber and different matrix SiC/SiC composites will be presented. Also, the effect of matrix cracking on electrical resistivity for several composite systems will be presented. The implications towards electrical resistance as a technique applied to composite processing, damage detection, and life-modeling will be discussed. |
| File Size | 286898 |
| Page Count | 17 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20080047465 |
| Archival Resource Key | ark:/13960/t1rg0qd75 |
| Language | English |
| Publisher Date | 2008-01-27 |
| Access Restriction | Open |
| Subject Keyword | Composite Materials Hypersonics Nondestructive Tests Ceramic Matrix Composites Thermal Protection Electrical Resistance Silicon Carbides Airfoils Detection Damage Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
