Compositions: ceramic – Ceramic compositions – Refractory
Patent
1992-05-11
1993-06-29
Bell, Mark L.
Compositions: ceramic
Ceramic compositions
Refractory
501 90, 501 92, 264DIG19, C04B 3552
Patent
active
052234614
ABSTRACT:
The present invention concerns novel high strength ceramic fibers derived from boron, silicon, and carbon organic precursor polymers. The ceramic fibers are thermally stable at and above 1200.degree. C. in air. The method for preparation of the boron-silicon-carbon fibers from a low oxygen content organosilicon boron precursor polymers of the general formula Si(R.sub.2)BR.sup.1 by melt-spinning, crosslinking and pyrolysis. Specifically, the crosslinked (or cured) precursor organic polymer fibers do not melt or deform during pyrolysis to form the silicon-boron-carbon ceramic fiber. These novel silicon-boron-carbon ceramic fibers are useful in high temperature applications because they retain tensile and other properties up to 1200.degree. C., from 1200.degree. to 1300.degree. C., and in some cases higher than 1300.degree. C.
REFERENCES:
patent: 3853567 (1974-12-01), Verbeek
patent: 3892583 (1975-07-01), Winter et al.
patent: 4052430 (1977-10-01), Yajima et la.
patent: 4550151 (1977-10-01), Takamizawa
patent: 4604367 (1985-08-01), Takamizawa et al.
patent: 4767728 (1988-08-01), Riccitiello
patent: 4851491 (1989-07-01), Riccitiello
patent: 4942011 (1990-07-01), Bolt
patent: 4987201 (1991-01-01), Riccitiello
K. J. Wynne et al "Ceramics via Polymer Pyrolysis" Ann. Rev. Mat. Sci., vol. 14, (1984), pp. 297-334.
W. Toreki, "Polymeric Precursor to Ceramics-A Review", Polymer News, vol. 16 (#1):6 pp. 6 to 14 (1991).
L. Maya, "Aminoborane Polymers as Precursors of C-N-B Ceramic Materials":, J. Am. Ceram. Soc., vol. 71 (#12): p. 1104 (1988).
M. Zeldin et al., (ed.), Inorganic and Organomet, ACS Symposium, Series 360, Wash. D.C. 1988, Table of Contents.
M-T. S. Hsu et al. "Preceramic organoboron-Silicon Polymers", J. Applied Polymer Sci., vol. 42 (1991). pp. 851-861.
G. E. Legros et al., "Ceramics form Hydridoplysilazane", Am. Ceram. Soc. Bull., vol. 66 (1987), pp. 363-367.
B. G. Penn et al. "Preparation of Silicon Carbide and Silicon Nitride Fibers by the Controlled Pyrolysis of Polycarbosilazanes", J. Applied Polymer Sci., vol. 27 (1982), p. 3751.
Chen Timothy S.
Hsu Ming-Ta S.
Riccitiello Salvatore R.
Bell Mark L.
Brekke Darrell G.
Green Anthony J.
Manning John R.
Miller Guy
LandOfFree
Ceramic silicon-boron-carhon fibers from organic silicon-boron-p does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Ceramic silicon-boron-carhon fibers from organic silicon-boron-p, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ceramic silicon-boron-carhon fibers from organic silicon-boron-p will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1755197