| タイトル | Preceramic Polymers for Use as Fiber Coatings |
| 本文（外部サイト） | http://hdl.handle.net/2060/19970003316 |
| 著者（英） | Hurwitz, F. I.; Baranwal, R.; Eldridge, J.; Dickerson, R.; Heimann, P. J.; Wheeler, D. |
| 著者所属（英） | NASA Lewis Research Center |
| 発行日 | 1996-01-01 |
| 言語 | eng |
| 内容記述 | Polymeric precursors to Si-C-O, SI-B-N and Si-C were evaluated for use as ceramic interfaces in ceramic matrix composites. Use of the preceramic polymers allows for easy dip coating of fibers from dilute solutions of a polymer, which are then pyrolyzed to obtain the ceramic. SCS-0 fibers (Textron Specialty Materials, Lowell, MA) were coated with polymers from three systems: polysilsesquioxanes, polyborosilazanes and polycarbosilanes. The polysilsesquioxane systems were shown to produce either silicon oxycarbide or silicon oxynitride, depending on the pyrolysis conditions, and demonstrated some promise in an RBSN (reaction-bonded silicon nitride) matrix model system. Polyborosilazanes were shown, in studies of bulk polymers, to give rise to oxidation resistant Si-B-N ceramics which remain amorphous to temperatures of 1600 C, and should therefore provide a low modulus interface. Polycarbosilanes produce amorphous carbon-rich Si-C materials which have demonstrated oxidation resistance. |
| NASA分類 | Composite Materials |
| レポートNO | 97N12060
NASA-TM-111755
NAS 1.15:111755
E-9616 |
| 権利 | No Copyright |
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