Reinforceable sintered glass-ceramics

Details Reinforceable sintered glass-ceramics Reinforceable sintered glass-ceramics

1988-11-17

1990-01-09

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

Devitrified glass-ceramics

501 5, 501 69, 501 71, 501 73, 501 95, C03C 1004, C03C 1006

Patent

active

048928461

ABSTRACT:
A fibre-reinforced ceramic material is made by making a melt of glass of specified composition, cooling the melt rapidly enough for it to solidify as a glass, crushing the glass to a particle size not exceeding 70 .mu.m but preferably not exceeding 50 .mu.m mixing the powder with reinforcing fibres and heat-treating the mixture, preferably under pressure. The glass composition is: 100 parts by weight of base glass (0-30 CaO, 0-30 MgO, 5-35 Al.sub.2 O.sub.3, and 35-75 SiO.sub.2) plus 1/2-3 parts Cr.sub.2 O.sub.3 plus 1/2-10 parts of Fe.sub.2 O.sub.3 or the equivalent.
This ensures the ceramic contains both surface-nucleated and internally-nucleated crystals, enhancing its properties.

REFERENCES:
patent: 3901716 (1975-08-01), Rogers et al.
patent: 4615987 (1986-10-01), Chyung et al.
patent: 4769346 (1988-09-01), Gadkaree et al.

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