Stock material or miscellaneous articles – Composite – Of silicon containing
Patent
1992-01-09
1994-08-23
Robinson, Ellis P.
Stock material or miscellaneous articles
Composite
Of silicon containing
428448, 428688, 428689, 428697, 428698, 428702, 501 89, 501 92, 501 93, 501 94, 501133, B32B 904
Patent
active
053406559
ABSTRACT:
In the present invention, there is provided a method for producing a self-supporting ceramic or ceramic composite body by the oxidation of a parent metal to form a polycrystalline ceramic material comprising the oxidation reaction product of said parent metal with an oxidant, including a vapor-phase oxidant, and optionally one or more metallic constituents dispersed throughout the polycrystalline ceramic material. The method comprises the steps of providing at least a portion of said parent metal with a barrier means at least partially spaced from said parent metal for establishing at least one surface of the ceramic body, and heating said parent metal to a temperature above its melting point but below the melting point of the oxidation reaction product to form a body of molten metal. At that temperature, the molten metal is reacted with the oxidant, thus forming the oxidation reaction product. At least a portion of the oxidation reaction product is maintained in contact with and between the molten metal and oxidant to transport the molten metal through the oxidation reaction product toward the barrier means and into contact with the oxidant so that fresh oxidation reaction product continues to form at an interface between the oxidant and previously formed oxidation reaction product. The reaction is continued until the oxidation reaction product contacts the barrier means to produce a ceramic body having the surface established by the barrier means. A shaped ceramic composite is formed by superimposing a barrier means onto either a loose mass of filler material or a self-supporting preform, and infiltrating the mass of filler or preform with the polycrystalline ceramic matrix, which grows until it contacts the barrier means.
REFERENCES:
patent: 1362237 (1920-12-01), Ros
patent: 2741822 (1956-04-01), Udy
patent: 3108887 (1963-10-01), Lenie
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
patent: 3437468 (1969-04-01), Seufert
patent: 3473938 (1969-10-01), Oberlin
patent: 3473987 (1969-10-01), Sowards
patent: 3538231 (1970-11-01), Newkirk
patent: 3551101 (1970-12-01), Matsuo
patent: 3692474 (1972-09-01), Arber
patent: 3789096 (1974-01-01), Church et al.
patent: 3796564 (1974-03-01), Taylor et al.
patent: 3864154 (1975-02-01), Gazza et al.
patent: 3973977 (1976-08-01), Wilson
patent: 4117096 (1978-07-01), Hosaka et al.
patent: 4824625 (1989-04-01), Claar et al.
patent: 4885199 (1989-12-01), Corbin
patent: 4923832 (1990-05-01), Newkirk et al.
A. J. Moulson, "Review: Reaction-Bonded Silicon Nitride: Its Formation and Properties", J. Mat. Science, 14, (1979), 1017-1051.
Drouzy et al., "Oxidation of Molten Aluminum Alloys", Reaction With Refractories, France, vol. 29, No. 332, pp. 121-128, Mar. 1974.
Clavaud et al., "Refractories for Aluminum Alloy Melting Furnaces," Sep. 25 & 26, 1980.
Moskovits, "The Kinetics of Oxidation of Molten Aluminum in Oxidation Streams", Oxidation of Metals, vol. 5, No. 1 (1972).
W. Kaiser and C. D. Thurmond, "Nitrogen in Silicon", Journal of Applied Physics, vol. 30, No. 3, pp. 427-431, Mar. 1959.
Kari Blegen, "Equilibria and Kinetics in the Systems Si-N and Si-N-O" pp. 223-244, Special Ceramics, vol. 6 (1975).
Y. W. Cho and J. A. Charles, "Synthesis of Nitrogen Ceramic Powders by Carbothermal Reduction and Nitridation, Part 1 Silicon Nitride", Materials Science and Technology Apr. 1991 vol. 7, pp. 289-298.
A. J. Moulson, "Review: Reaction-bonded Silicon Nitride: Its Formation and Properties", Journal of Materials Science 14 (1979) pp. 1017-1051.
R. A. Alliegro, "Processing and Fabrication of Non-Hot-Pressed Silicon Carbide", Ceramics For High Performance Applications, vol. 2 (1974) pp. 253-263.
Creber David K.
Johnson William B.
Newkirk Marc S.
Lanxide Technology Company, LP
Mortenson Mark G.
Ramberg Jeffrey R.
Robinson Ellis P.
Speer Timothy M.
LandOfFree
Method of making shaped ceramic composites with the use of a bar does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of making shaped ceramic composites with the use of a bar, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of making shaped ceramic composites with the use of a bar will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-501745