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Interface control and mechanical property improvements in silicon carbide/titanium composites
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Brewer, W. D. Unnam, J. |
| Copyright Year | 1982 |
| Description | Several composite systems made of titanium matrix reinforced with silicon carbide fiber were investigated to obtain a better understanding of composite-degradation mechanisms and to develop techniques to minimize loss of mechanical properties during fabrication and in service. Emphasis was on interface control by fiber or matrix coatings. X-ray diffraction studies on planar samples showed that the formation of titanium silicides was greatly inhibited by the presence of aluminum or Ti3A1 layers at the fiber-matrix interface, with the Ti3A1 being more effective in reducing the reactions. Fiber studies showed that coating the fiber with a 1-micron-thick layer of aluminum improved the as-fabricated strength of a stoichiometric SiC fiber and reduced the fiber degradation during exposure to composite-fabrication conditions. Applying an interfacial barrier by coating the matrix foils instead of the fibers was found to be an effective method for improving composite strength. Reducing the fabrication temperature also resulted in significant improvements in composite strengths. Good-quality, well-consolidated composites were fabricated at temperatures well below those currently used for SiC-Ti composite fabrication. |
| File Size | 3041282 |
| Page Count | 28 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19820023575 |
| Archival Resource Key | ark:/13960/t1qg3j61b |
| Language | English |
| Publisher Date | 1982-08-01 |
| Access Restriction | Open |
| Subject Keyword | Composite Materials Degradation Fabrication Metal Coatings Aluminum Temperature Effects Fiber-matrix Interfaces Fiber Composites Mechanical Properties Titanium Silicon Carbides X Ray Diffraction Matrix Materials 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 |
