Compositions: ceramic – Ceramic compositions – Refractory
Patent
1988-01-25
1991-02-26
Dixon, Jr., William R.
Compositions: ceramic
Ceramic compositions
Refractory
501152, C04B 3550
Patent
active
049961756
ABSTRACT:
A method and process for producing a yttrium oxide metal casting refractory composition is disclosed. Powdered Y.sub.2 O.sub.3 is combined with a sintering agent (preferably V.sub.2 O.sub.5) and an organic binder. The mixture is sintered and ground to produce a stable Y.sub.2 O.sub.3 flour. The flour is added to another binder having specific SiO.sub.2, hydrolysis and viscosity levels in order to produce a slurry. Slurries prepared in accordance with the invention avoid problems traditionally associated with Y.sub.2 O.sub.3 hydration and/or carbonation, and have long storage lives. In addition, the material costs associated with the slurries are low in comparison with products using fused Y.sub.2 O.sub.3. The Y.sub.2 O.sub.3 slurries may also find application as solid preformed cores formed by any conventional injection molding, transfer molding, or slurry casting process.
REFERENCES:
patent: 3545987 (1970-12-01), Anderson
patent: 3873657 (1975-03-01), Toda et al.
patent: 3955616 (1976-05-01), Gigliotti, Jr. et al.
patent: 4063954 (1977-12-01), Brown
patent: 4115134 (1978-09-01), Rhodes
patent: 4166831 (1979-09-01), Rhodes et al.
patent: 4174973 (1979-11-01), Rhodes et al.
patent: 4407970 (1983-10-01), Komatsu et al.
patent: 4578487 (1986-03-01), Barfurth et al.
patent: 4703806 (1987-11-01), Lassow et al.
patent: 4787439 (1988-11-01), Feagin
patent: 4799532 (1989-01-01), Mizuhara
Calvert, E. D., "An Investment Mold for Titanium Casting", Bureau of Mines Report of Investigation No. 8541 (1981).
Helferich, R. L. et al., "An Investigation of Yttrium Oxide as a Crucible Material for Melting Titanium", Dept. of Navy, Naval Ship Research & Development Center, Jan. 1973, Report 3911.
"Third Interim Technical Report Development of Titanium Alloy Casting Technology", Airesearch Mfg. Co. of Ariz., Jan. 1975.
Feagin, R. C., "Casting of Reactive Metals into Ceramic Molds", Sixth World Conference on Investment Casting (date unknown).
"Development of Titanium Alloy Casting Technology", Airesearch Manufacturing Company of Arizona, Aug. 1976.
Searle, Alfred B., "Refractory Materials: Their Manufacture and Uses", Charles Griffin & Co., Ltd., London, England, p. 122 (1917).
Searle, Alfred B., "Refractory Materials: Their Manufacture and Uses", Charles Griffin & Co., Ltd., London, England, 2nd Ed., pp. 194-196 (1924).
Norton, F. H., "Refractories", McGraw-Hill Book Company, Inc., 3rd Ed., pp. 302-339 (1949).
Dixon Jr. William R.
Green Anthony J.
Precision Castparts Corp.
LandOfFree
Refractory composition and method for metal casting does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Refractory composition and method for metal casting, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Refractory composition and method for metal casting will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-293883