Dense skin ceramic structure and method of making the same

Details Dense skin ceramic structure and method of making the same Dense skin ceramic structure and method of making the same

1993-02-08

1995-04-18

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

Refractory

501103, 501134, 501154, C04B 3502

Patent

active

054078741

ABSTRACT:
The invention concerns self-supporting ceramic structures, including ceramic composite structures embedding a filler, and methods of making them. The ceramic structures comprise a polycrystalline material made by oxidation of a body of molten parent metal with an oxidant. The polycrystalline material has a first region substrate surmounted by a terminal region stratum which is integral with the first region. The terminal region stratum which is harder and of denser, finer crystalline structure than the first region substrate and is formed in a reaction stage subsequent to the reaction stage in which the first region of polycrystalline material is formed. Growth of the first stage is attained by by attenuating or interrupting the transport of molten parent metal to the first region under conditions which nonetheless leave or maintain therein enough oxidizable molten parent metal to form the polycrystalline material of the terminal region.

REFERENCES:
patent: 2741822 (1956-04-01), Udy
patent: 3255027 (1966-06-01), Talsma
patent: 3262763 (1966-07-01), Bechtold
patent: 3296002 (1967-01-01), Hare
patent: 3298842 (1967-01-01), Seufert
patent: 3419404 (1968-12-01), Mao
patent: 3421863 (1969-01-01), Bawa et al.
patent: 3437468 (1969-04-01), Seufert
patent: 3473938 (1969-10-01), Oberlin
patent: 3473987 (1969-10-01), Sowards
patent: 3789096 (1974-01-01), Church
patent: 3864154 (1975-02-01), Gazza et al.
patent: 3868267 (1975-02-01), Gazza et al.
patent: 3973977 (1976-08-01), Wilson
patent: 4837232 (1989-06-01), Luszcz et al.
patent: 4851375 (1989-07-01), Newkirk et al.
patent: 4853352 (1989-08-01), Newkirk et al.
patent: 5185302 (1993-02-01), Luszcz et al.
"Oxidation of Molten Aluminum Alloys, Reaction with Refractories"-M. Drouzy and M. Richard-Mar., 1974 Fonderie, France No. 332 pp. 121-128.
"Refractories for Aluminum Alloy Melting Furnaces"-no date B. Clavaud and V. Jost-Sep., 1980-Lillian Brassinga (from French) Jan., 1985.

Affiliated with

Also associated with

Rating

Dense skin ceramic structure and method of making the same does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Dense skin ceramic structure and method of making the same, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dense skin ceramic structure and method of making the same will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-66971