Preparation of boron-doped silicon carbide fibers

Details Preparation of boron-doped silicon carbide fibers Preparation of boron-doped silicon carbide fibers

1996-07-18

1998-08-11

Derrington, James

Plastic and nonmetallic article shaping or treating: processes

Outside of mold sintering or vitrifying of shaped inorganic...

Using organometallic or organosilicon intermediate

264627, 264639, C04B 35565

Patent

active

057924163

ABSTRACT:
A method of preparing polymer derived silicon fibers comprising the steps of providing a spin dope solution comprising a silicon carbide forming organosilicon polymer, preferably polycarbosilane, a solvent, a soluble boron precursor, preferably solid boron hydride, and a nitrogen containing precursor, preferably polyvinylsilazane; spinning the solution to form high strength green fibers; and heat treating the green fibers to produce high strength, homogeneously doped, boron containing fibers. The fibers produced are high strength, homogeneously boron doped silicon carbide fibers with average tensile strength in the range of from about 2.0 to 4.0 GPa at room temperature.

REFERENCES:
patent: 4942011 (1990-07-01), Bolt et al.
patent: 5171722 (1992-12-01), Toreki et al.
patent: 5279780 (1994-01-01), Lipowitz et al.
patent: 5298467 (1994-03-01), Hartado et al.

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