Chemical and Biomolecular Engineering

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  • Inventor(s):
    Allen H. Simpson, Slawomir T. Fryska, Mark L. La Forest, Roger L. Klinedinst, Alexander Mukasyan
    Patent Number:
    US 7922845 B2
    Description:

    An apparatus for bonding a first carbon composite to a second carbon composite through a reactant layer includes a housing, and a pair of conductive press plates electrically isolated from the housing. The press plates are adapted to position the two parts to be bonded with a reactant layer therebetween. The press plates are subjected to an electrical potential and a clamping force, sufficient to initiate a combustion reaction that creates a molten ceramic to bond together the carbon-carbon c…

    Date Issued:
    2011-04-12
    Resource Type
    Patent
  • Inventor(s):
    Allen H. Simpson, Mark L. La Forest, Alexander Mukasyan
    Patent Number:
    US 8178212 B2
    Description:

    Method for chemical bonding of fiberglass fibers to steel surfaces to prepare the steel for bonding with carbon composite material. This fiber-bonding step greatly increases the strength of the subsequent metal-composite bond. The fiberglass fibers which are chemically bonded to the steel provide a high surface area interface to entangle with carbon fibers in the composite component, and thereby inhibit crack formation on the boundary surface between the steel and composite components when th…

    Date Issued:
    2012-05-15
    Resource Type
    Patent
  • Inventor(s):
    Allen H. Simpson, Mark L. La Forest, Alexander Mukasyan
    Patent Number:
    US 8574470 B2
    Description:

    Method of joining a carbon-carbon composite piece 30 together with a metal insert 20, e.g. in the manufacture of aircraft brake discs 10. The method includes the steps of: providing a carbon-carbon composite piece 30 and a metal insert 20, wherein the metal insert 20 has a surface that is complementary to a surface of said carbon-carbon composite piece 30; providing a layer of a mixture of titanium powder and carbon powder on the first complementary mating surface; arranging the powder layer …

    Date Issued:
    2013-11-05
    Resource Type
    Patent
  • Inventor(s):
    Manuel Koucouthakis, Douglas J. Steinke, Alexander Mukasyan, Jeremiah D. E. White
    Patent Number:
    US 9321692 B2
    Description:

    Production of pore-free carbon/carbon-silicon carbide composite materials with mechanical properties making them suitable for use in such applications as the production of aircraft landing system brake components including brake discs. The method includes: providing a porous carbon-carbon composite preform; surrounding the porous carbon-carbon composite preform with silicon powder to form an intermediate construct; applying a uniaxial load to the construct; applying direct electrical current …

    Date Issued:
    2016-04-26
    Resource Type
    Patent
  • Inventor(s):
    Allen H. Simpson, Mark L. La Forest, Alexander Mukasyan, Douglas J. Steinke
    Patent Number:
    US 7588179 B2
    Description:

    Resin-impregnated carbon fiber composites containing metal inserts. Carbon fibers or a carbon fiber preform are bonded to a metal structural member. Once the carbon fiber-metal bond is established, the fiber-metal assembly or hybrid preform is impregnated with resin, to form an article in which bonding between the metal structural member and the composite remainder of the article is greatly enhanced. In a process embodiment, a metal insert, e.g. a steel insert, is provided in contact with par…

    Date Issued:
    2009-09-15
    Resource Type
    Patent
  • Inventor(s):
    Arvind Varma, Alexander Mukasyan, Bing-Yun Li
    Patent Number:
    US 6896846 B2
    Description:

    A method for synthesis of biomedical alloys has been developed based on combustion phenomena. This low pressure combustion synthesis (LPCS) technique may be used for production of Co-based and other metal-based alloys, which cover the entire range of orthopaedic implants, including total hip and knee replacements, as well as hone screws, plates, and wires. A unique aspect of the method is that combustion synthesis under low ambient gas pressure allows one to produce pore-free (>99% theoret…

    Date Issued:
    2005-05-24
    Resource Type
    Patent
  • Inventor(s):
    Mark L. La Forest, Allen H. Simpson, Slawomir T. Fryska, Alexander Mukasyan
    Patent Number:
    US 8383197 B2
    Description:

    A metal powder is applied to the surface of the area of a carbon-carbon composite brake disc to be protected against migration of antioxidant. The metal powder may be titanium powder or tungsten powder. A chemical reaction between the metal powder and carbon is then initiated by heating the powder-coated brake to the ignition temperature via application of electric current (Joule preheating) or by heating it in a furnace. Upon combustion, the metal particles react with carbon in the composite…

    Date Issued:
    2013-02-26
    Resource Type
    Patent
  • Inventor(s):
    Allen H. Simpson, Slawomir T. Fryska, Mark L. La Forest, Roger L. Klinedinst, Alexander Mukasyan, Charles D. D'Amico
    Patent Number:
    US 8448685 B2
    Description:

    An apparatus for bonding a first carbon composite to a second carbon composite through a reactant layer includes a housing, and a pair of conductive press plates electrically isolated from the housing. The press plates are adapted to position the two parts to be bonded with a reactant layer therebetween. The press plates are subjected to an electrical potential and a clamping force, sufficient to initiate a combustion reaction that creates a molten ceramic to bond together the carbon-carbon c…

    Date Issued:
    2013-05-28
    Resource Type
    Patent
  • Inventor(s):
    Alexander Mukasyan, Khachatur Manukyan
    Patent Number:
    US 9580323 B2
    Description:

    The invention provides methods for the combustion synthesis (CS) of graphene by a novel exothermic self-sustained reaction between a refractory ceramic compound and a carbon-containing polymer under an inert gas atmosphere. The synthesis of graphene was confirmed by both transmission electron microscopy and Raman spectroscopy. The graphene produced has very low (<1 wt. %) oxygen content. Fluorocarbon gases released due to decomposition of the carbon-containing polymer in the combustion wav…

    Date Issued:
    2017-02-28
    Resource Type
    Patent
  • Inventor(s):
    Allen H. Simpson, Slawomir T. Fryska, Mark L. La Forest, Alexander Mukasyan
    Patent Number:
    US 7858187 B2
    Description:

    Method of joining carbon-carbon composite pieces together, e.g. in the refurbishment of aircraft brake discs. The method includes the steps of: providing a first carbon-carbon composite piece and a second carbon-carbon composite piece, wherein the second carbon-carbon composite piece has a surface that is complementary to a surface of said first carbon-carbon composite piece; providing a layer of a mixture of titanium powder and carbon powder on the first complementary mating surface; arrangi…

    Date Issued:
    2010-12-28
    Resource Type
    Patent
  • Inventor(s):
    Allen H. Simpson, Gregory Vanderheyden, Alexander Mukasyan, Mark L. La Forest
    Patent Number:
    US 10100889 B2
    Description:

    A brake disc rotor or stator is manufactured with slots in the interior face of the disc. A paste comprised of a fine powder of a carbide-forming metal along with fine carbon powder, suspended in an organic binder, is applied to the force-bearing areas in the rotor slot faces or the stator slot faces. The disc is then placed into a furnace in a nitrogen atmosphere and heated to the ignition temperature. When the furnace reaches the ignition temperature, a combustion reaction begins that creat…

    Date Issued:
    2018-10-16
    Resource Type
    Patent