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Inventor:
Christodoulou; Leontios
Address:
Baltimore, MD
No. of patents:
25
Patents:




Patent Number Title Of Patent Date Issued
5458701 Cr and Mn, bearing gamma titanium aluminides having second phase dispersoids October 17, 1995
An article comprises a Cr-bearing, predominantly gamma titanium aluminide matrix including second phase dispersoids, such as TiB.sub.2, in an amount effective to increase both the strength and the ductility of the matrix.
5433799 Method of making Cr-bearing gamma titanium aluminides July 18, 1995
An article comprises a Cr-bearing, predominantly gamma titanium aluminide matrix including second phase dispersoids, such as TiB.sub.2, in an amount effective to increase both the strength and the ductility of the matrix.
5354351 Cr-bearing gamma titanium aluminides and method of making same October 11, 1994
An article comprises a Cr-bearing, predominantly gamma titanium aluminide matrix including second phase dispersoids, such as TiB.sub.2, in an amount effective to increase both the strength and the ductility of the matrix.
5217816 Metal-ceramic composites June 8, 1993
A method is taught for the in-situ precipitation of ceramic materials in a metal matrix. By means of the solvent assisted reaction, metal-ceramic composites having highly superior properties may be obtained. The invention involves the reaction of the ceramic forming constituents in a
5212343 Water reactive method with delayed explosion May 18, 1993
Devices and methods are disclosed for contacting a hot reaction mass with water to initiate an explosive reaction. The reaction mass comprises a ceramic or intermetallic material that is produced by exothermically reacting a mixture of reactive elements. Suitable reaction masses include
5093148 Arc-melting process for forming metallic-second phase composites March 3, 1992
An arc-melting method is taught for the formation of metallic-second phase composite materials. The method involves the formation of an intermediate composite material comprising a relatively high loading of second phase particles dispersed in a metal matrix. This intermediate material i
5059490 Metal-ceramic composites containing complex ceramic whiskers October 22, 1991
The present invention relates to the formation of whisker reinforced metal matrix composites in which complex boride or carbide whiskers having an aspect ratio of greater than 10:1 are distributed throughout a metal, metal alloy, or intermetallic matrix. Exemplary complex boride whiskers
5015534 Rapidly solidified intermetallic-second phase composites May 14, 1991
This invention relates to a rapidly solidified product comprising a second phase in both a stable particulate form and a metastable flake form dispersed in an intermetallic matrix.
4985202 Process for forming porous metal-second phase composites January 15, 1991
A method is taught for the in-situ precipitation of second phase materials, such as ceramic or intermetallic particles, in a substantial volume fraction of solvent metal matrix. The invention involves the propagating reaction of the second phase-forming constituents in a solvent metal
4921531 Process for forming fine ceramic powders May 1, 1990
The present invention relates to a process for the production of fine powder materials and the products of that process. The process involves the in-situ precipitation of second phase particles, such as ceramic or intermetalics, within a metal matrix, followed by separation of the pa
4917964 Porous metal-second phase composites April 17, 1990
A method is taught for the in-situ precipitation of second phase materials, such as ceramic or intermetallic particles, in a substantial volume fraction of solvent metal matrix. The invention involves the propagating reaction of the second phase-forming constituents in a solvent metal
4916030 Metal-second phase composites April 10, 1990
A method is taught for the introduction of in-situ precipitated second phase materials, such as ceramic or intermetallic particles in a metal matrix, to a host metal. When an initial solvent-assisted reaction is utilized, metal-second phase composites having highly superior properties
4916029 Composites having an intermetallic containing matrix April 10, 1990
This invention relates to a composite material comprising an in-situ precipitated second phase in an intermetallic matrix, and to the process for making such a composite.
4915908 Metal-second phase composites by direct addition April 10, 1990
A method is taught for the in-situ precipitation of second phase materials, such as ceramic or intermetallic particles, in a metallic matrix. By means of the Direct Addition Process, metal-second phase composites having highly superior properties may be obtained. Compacts of second p
4915905 Process for rapid solidification of intermetallic-second phase composites April 10, 1990
This invention relates to a process for making in-situ precipitated second phase in an intermetallic matrix, which composite is rapidly solidified to form a product. The invention also relates to a rapidly solidified product comprising a second phase in both a stable particulate form and
4915904 Process for stabilization of titanium silicide particulates within titanium aluminide containing April 10, 1990
This invention relates to a metallic-second phase composites comprising a matrix of titanium aluminide with discrete titanium silicide particles dispersed therein. The second phase dispersoid is stabilized during the process of in-situ formation by the presence of zirconium.
4915903 Process for forming composites having an intermetallic containing matrix April 10, 1990
A method is taught for the formation of intermetallic-second phase composite materials. The method involves the formation of a first metal-second phase composite comprising a relatively high loading of discrete, second phase particles distributed throughout a metal matrix, dilution o
4915902 Complex ceramic whisker formation in metal-ceramic composites April 10, 1990
The present invention relates to the formation of whisker reinforced metal matrix composites in which complex boride or carbide whiskers are distributed throughout a metal, metal alloy, or intermetallic matrix. Exemplary complex boride whiskers include TiNbB, TiTaB, TiVB, NbHfB, and
4836982 Rapid solidification of metal-second phase composites June 6, 1989
This invention relates to a process for making in-situ precipitated second phase in a metal matrix which mixture is rapidly solidified to form a product. The invention also relates to a rapidly solidified product.
4800065 Process for making ceramic-ceramic composites and products thereof January 24, 1989
This invention relates to ceramic-ceramic composites comprising a dispersion of ceramic particles in a ceramic matrix. The production of these composites involves the in-situ precipitation of ceramic particles in a solvent metal matrix and the conversion of the matrix to a ceramic by
4774052 Composites having an intermetallic containing matrix September 27, 1988
This invention relates to a composite material comprising an in-situ precipitated second phase in an intermetallic matrix, and to the process for making such a composite.
4772452 Process for forming metal-second phase composites utilizing compound starting materials September 20, 1988
This invention relates to a process for making composite materials involving the in-situ precipitation of second phase particles in a metal matrix, and the products thereof. The process involves the use of initial compound materials as a source of second phase-forming reactants in the
4751048 Process for forming metal-second phase composites and product thereof June 14, 1988
A method is taught for the introduction of in-situ precipitated second phase materials, such as ceramic or intermetallic particles in a metal matrix, to a host metal. When an initial solvent-assisted reaction is utilized, metal-second phase composites having highly superior properties
4738389 Welding using metal-ceramic composites April 19, 1988
A method for welding metal composite materials, including metal-ceramic composites, whereby a weld or filler material is prepared by the in-situ precipitation of ceramic in a metallic matrix. The filler material may comprise boride, carbide, oxide, nitride, silicide, etc., while the matr
4710348 Process for forming metal-ceramic composites December 1, 1987
A method is taught for the in-situ precipitation of ceramic materials in a metal matrix. By means of the solvent assisted reaction, metal-ceramic composites having highly superior properties may be obtained. The invention involves the reaction of the ceramic forming constituents in a


 
 
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