Patents Represented by Attorney Herbert W. Mylius
  • Patent number: 4943301
    Abstract: Magnesia pellets are formed from finely-divided, highly reactive, lightburned magnesia (MgO) particles by granulating such powders in conventional equipment using either an organic liquid or an organic liquid-binder mixture. The organic liquid may be an alcohol or a ketone the alkyl groups of which, independently, can have from 1 to 4 carbon atoms. Magnesium chloride and water are among disclosed binders which may be used in combination with said organic liquid. The organic liquid should be more than about 80% of any admixtures with water.
    Type: Grant
    Filed: August 1, 1988
    Date of Patent: July 24, 1990
    Assignee: Martin Marietta Magnesia Specialties Inc.
    Inventors: Dennis C. Nagle, Richard H. Van de Walle
  • Patent number: 4917964
    Abstract: 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 medium to provide a porous composite of finely-dispersed second phase particles in the metal matrix. Exemplary materials include titanium carbide or titanium diboride in an aluminum matrix.
    Type: Grant
    Filed: August 30, 1989
    Date of Patent: April 17, 1990
    Assignee: Martin Marietta Corporation
    Inventors: William C. Moshier, John M. Brupbacher, Leontios Christodoulou, Dennis C. Nagle
  • Patent number: 4915902
    Abstract: 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 TiNbMoB. Exemplary complex carbide whiskers include TiNbC, TiVC, TiZrC, TiHfC, and TiTaC. A method for the in-situ formation of complex boride and complex carbide whiskers within metallic matrices is disclosed which involves reacting a mixture of individual complex ceramic-forming constituents in the presence of a metal to precipitate the desired complex ceramic whiskers in a metal matrix.
    Type: Grant
    Filed: February 17, 1988
    Date of Patent: April 10, 1990
    Assignee: Martin Marietta Corporation
    Inventors: John M. Brupbacher, Leontios Christodoulou, Dennis C. Nagle
  • Patent number: 4916030
    Abstract: 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 may be obtained. The invention may utilize the reaction of the second phase-forming constituents in a solvent metal medium to provide an intermediate material of finely-dispersed second phase particles in an intermediate metal matrix, in the form of a porous mass or sponge. Any desired loading of second phase in the final composite may be achieved by the admixture of this preformed intermediate material having a relatively high content of particulate material, with a molten host metal. Exemplary materials include titanium diboride in an aluminum matrix and titanium carbide in an aluminum matrix.
    Type: Grant
    Filed: September 29, 1987
    Date of Patent: April 10, 1990
    Assignee: Martin Marietta Corporation
    Inventors: Leontios Christodoulou, Dennis C. Nagle, John M. Brupbacher
  • Patent number: 4915904
    Abstract: 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.
    Type: Grant
    Filed: September 26, 1988
    Date of Patent: April 10, 1990
    Assignee: Martin Marietta Corporation
    Inventors: Leontios Christodoulou, James C. Williams, Michael A. Riley
  • Patent number: 4915908
    Abstract: 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 phase-forming constituents and solvent metal are directly added to a molten metal bath to precipitate the second phase in-situ. Exemplary materials include titanium diboride or titanium carbide in an aluminum matrix.
    Type: Grant
    Filed: November 5, 1986
    Date of Patent: April 10, 1990
    Assignee: Martin Marietta Corporation
    Inventors: Dennis C. Nagle, John M. Brupbacher, Leontios Christodoulou
  • Patent number: 4915905
    Abstract: 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 a metastable flake form dispersed in an intermetallic matrix.
    Type: Grant
    Filed: September 26, 1988
    Date of Patent: April 10, 1990
    Assignee: Martin Marietta Corporation
    Inventors: Stephen L. Kampe, John M. Brupbacher, Leontios Christodoulou, Dennis C. Nagle
  • Patent number: 4915903
    Abstract: 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 of the first composite into an additional amount of metal to form a second composite comprising a lower loading of second phase particles within an intermediate metal matrix, and introduction of the second composite into another metal which is reactive with the intermediate metal matrix of the composite to form an intermetallic. A final intermetallic-second phase composite is thereby formed comprising a dispersion of discrete second phase particles throughout a final intermetallic matrix. The final intermetallic matrix may comprise a wide variety of intermetallic materials, with particular emphasis drawn to the aluminides and silicides. Exemplary intermetallics include Ti.sub.3 Al, TiAl, TiAl.sub.3, Ni.sub.3 Al, NiAl, Nb.sub.
    Type: Grant
    Filed: May 5, 1988
    Date of Patent: April 10, 1990
    Assignee: Martin Marietta Corporation
    Inventors: John M. Brupbacher, Leontios Christodoulou, Dennis C. Nagle
  • Patent number: 4916029
    Abstract: 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.
    Type: Grant
    Filed: September 29, 1987
    Date of Patent: April 10, 1990
    Assignee: Martin Marietta Corporation
    Inventors: Dennis C. Nagle, John M. Brupbacher, Leontios Christodoulou
  • Patent number: 4909608
    Abstract: Certain benzophenone derivatives having acentric crystalline space groups are disclosed as second-order nonlinear optical materials. The second harmonic signal of such derivatives is enhanced for compounds containing an electron-donating group attached to one of the benzene rings and which is para relative to the carbonyl group of the benzophenone derivative. Benzophenone hydrazone, 4-aminobenzophenone, and 4-amino-3-nitrobenzophenone are exemplary benzophenone derivatives according to the invention. Also disclosed are nonlinear optical devices which include single crystals of the benzophenone derivatives.
    Type: Grant
    Filed: November 17, 1987
    Date of Patent: March 20, 1990
    Assignee: Martin Marietta Corporation
    Inventor: Claude C. Frazier, III
  • Patent number: 4883541
    Abstract: Smut may be removed from the surface of aluminum or aluminum alloys by a deoxidizer comprising nitric acid, a halate salt, and, optionally, an activator.
    Type: Grant
    Filed: January 17, 1989
    Date of Patent: November 28, 1989
    Assignee: Martin Marietta Corporation
    Inventor: Maher E. Tadros
  • Patent number: 4879479
    Abstract: The present invention relates to a device for optical switching, frequency conversion, and protection of sensory organs and optical and electronic sensors which comprises at least one layer comprising a polymerized transition metal poly-yne.
    Type: Grant
    Filed: August 5, 1987
    Date of Patent: November 7, 1989
    Assignee: Martin Marietta Corporation
    Inventors: Claude C. Frazier, Shekhar Guha, Wenpeng Chen
  • Patent number: 4865666
    Abstract: Intermetallics capable of use as structural elements, exhibiting relatively high ductility and low brittleness, comprise ternary and quaternary TiAl.sub.3 alloys of the general formulae Al--Ti--M and Al--Ti--M--M', wherein M is selected from Cu, Ni, and Fe, M' is selected from V, Nb, and Ta. Such materials exhibit cubic, Ll.sub.2 crystal structures.
    Type: Grant
    Filed: October 14, 1987
    Date of Patent: September 12, 1989
    Assignee: Martin Marietta Corporation
    Inventors: K. Sharvan Kumar, Walter Precht
  • Patent number: 4836982
    Abstract: 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.
    Type: Grant
    Filed: June 13, 1986
    Date of Patent: June 6, 1989
    Assignee: Martin Marietta Corporation
    Inventors: John M. Brupbacher, Leontios Christodoulou, Dennis C. Nagle
  • Patent number: 4834957
    Abstract: An aqueous magnesium oxide suspension is disclosed which comprises from about 15 to about 50 percent by weight MgO, based on the combined weight of water, MgO, suspension aid, and anti-hydration agent. Suspension aids such as Xzanthan gum and guar gum are utilized in the presence of a lignin sulfonate anti-hydration agents to provide a highly stable concentrated suspension, useful as a base for fertilizers, animal feeds, etc.
    Type: Grant
    Filed: April 21, 1987
    Date of Patent: May 30, 1989
    Assignee: Martin Marietta Corporation
    Inventor: Richard H. Van de Walle
  • Patent number: 4824495
    Abstract: A combustible coating for providing a delay barrier to intrusion into an object. The coating contains a source of fuel as a metal and/or a polymer and a source of oxygen such as an oxidizer. The coating is ignitable at a temperature in excess of about 300.degree. C., during combustion is resistant to the effects of common fire extinguishing materials, and is capable of sustaining combustion for at least five minutes with a burn rate of no more than about six inches per minute.
    Type: Grant
    Filed: April 10, 1987
    Date of Patent: April 25, 1989
    Assignee: Martin Marietta Corporation
    Inventor: Vencatesh R. P. Verneker
  • Patent number: 4800065
    Abstract: 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 reacting it with a matrix reactive species. Exemplary ceramic dispersoids include TiB.sub.2, ZrB.sub.2, TiC and TiN. Exemplary ceramic matrices include AlN, Al.sub.2 O.sub.3 and SiO.sub.2.
    Type: Grant
    Filed: November 18, 1987
    Date of Patent: January 24, 1989
    Assignee: Martin Marietta Corporation
    Inventors: Leontios Christodoulou, Dennis C. Nagle, John M. Brupbacher
  • Patent number: 4775539
    Abstract: This invention constitute a novel binder composition for pelleted and compressed animal feeds, comprising a mixture of a reactive metal salt and a reactive metal oxide or hydroxide.
    Type: Grant
    Filed: August 26, 1986
    Date of Patent: October 4, 1988
    Assignee: Martin Marietta Corporation
    Inventor: Richard H. Van de Walle
  • Patent number: 4774052
    Abstract: 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.
    Type: Grant
    Filed: June 13, 1986
    Date of Patent: September 27, 1988
    Assignee: Martin Marietta Corporation
    Inventors: Dennis C. Nagle, John M. Brupbacher, Leontios Christodoulou
  • Patent number: 4772452
    Abstract: 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 production of metal-second phase composites. The composites produced may comprise distributions of either single or multiple second phase materials. Exemplary initial compound precursors include boron nitride, boron carbide, boron oxide, aluminum nitride, aluminum carbide, aluminum boride, iron oxide and copper oxide.
    Type: Grant
    Filed: April 3, 1987
    Date of Patent: September 20, 1988
    Assignee: Martin Marietta Corporation
    Inventors: John M. Brupbacher, Leontios Christodoulou, Dennis C. Nagle