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Relative sliding durability of two candidate high temperature oxide fiber seal materials
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Dellacorte, Christopher Steinetz, Bruce M. |
| Copyright Year | 1991 |
| Description | A test program to determine the relative sliding durability of two candidate ceramic fibers for high temperature sliding seal applications is described. Pin on disk tests were used to evaluate potential seal materials. Friction during the tests and fiber wear, indicated by the extent of fibers broken in a test bundle or yarn, was measured at the end of a test. In general, friction and wear increase with test temperature. This may be due to a reduction in fiber strength, a change in the surface chemistry at the fiber/counterface interface due to oxidation, adsorption and/or desorption of surface species and, to a lesser extent, an increase in counterface surface roughness due to oxidation at elevated temperatures. The relative fiber durability correlates with tensile strength indicating that tensile data, which is more readily available than sliding durability data, may be useful in predicting fiber wear behavior under various conditions. A simple model developed using dimensional analysis shows that the fiber durability is related to a dimensionless parameter which represents the ratio of the fiber strength to the fiber stresses imposed by sliding. |
| File Size | 2723372 |
| Page Count | 22 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19920000846 |
| Archival Resource Key | ark:/13960/t70w3d17m |
| Language | English |
| Publisher Date | 1991-09-01 |
| Access Restriction | Open |
| Subject Keyword | Temperature Dependence Ceramic Fibers Durability Oxides High Temperature Research Desorption Surface Roughness Tensile Strength Seals Stoppers Fiber Strength Adsorption Surface Reactions Wear Reinforcing Fibers Oxidation Yarns Sliding Friction Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
