Controlled fiber distribution technique for glass matrix composi

Details Controlled fiber distribution technique for glass matrix composi Controlled fiber distribution technique for glass matrix composi

1986-09-02

1988-10-25

Dixon, Jr., William R.

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

501 35, 501 95, 264DIG19, C03C 100, C03C 1400

Patent

active

047804327

ABSTRACT:
A method for manufacturing a discontinuous fiber reinforced glass matrix composites by injection molding using an injection nozzle that separates substantially all of a multifilament yarn into individual fibers resulting in a composite having greater crack resistance. The method comprises impregnating continuous filament yarn with glass matrix powders comprising glass, glass-ceramic powders or a mixture thereof. The impregnated multifilament yarn is chopped into discontinuous lengths and exposed to a temperature sufficient so that the matrix material softens. Pressure is applied to the heated impregnated multifilament yarn sufficient to displace the yarn into a mold through an injection nozzle contoured such that sufficient die-wall shear forces are generated to separate substantially all of the multifilament yarn into individual filaments. A mold pressure is maintained sufficient to prevent relaxation of the composite until the strain point of the glass is reached.

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