Claims
- 1. A high temperature resistant filter for use in filtering molten metals, said filter comprising:
- a rigid porous alumina foam substrate material having an open cell structure characterized by a plurality of interconnecting voids; and
- a substantiall uniform, relatively thin silicon carbide coating throughout said substrate material, said silicon carbide coating improving the strength and thermal conductivity of said substrate material, reducing the friability of said substrate material, and being formed from a slurry having a viscosity of about 1 to 50 centipoise and containing silicon carbide havig a maximum settling rate of about 0.1 mm/min.
Parent Case Info
This application is a division of application Ser. No. 691,618, filed Jan. 14, 1985, now U.S. Pat. No. 4,708,740, which is a continuation-in-part of Ser. No. 599,098, filed Apr. 11, 1984, now U.S. Pat. NO. 4,537,627.
US Referenced Citations (20)
Divisions (1)
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Number |
Date |
Country |
Parent |
691618 |
Jan 1985 |
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Continuation in Parts (1)
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Number |
Date |
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Parent |
599098 |
Apr 1984 |
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