Patents Assigned to Plasma Technology, Inc.
  • Thermal spray forming of a composite material having a particle-reinforced matrix
    Patent number: 6436480
    Abstract: To prepare a thermally sprayed composite material, a precomposited powder is first prepared and then thermally sprayed at an ambient pressure of no less than about 0.75 atmosphere in an oxidation-preventing atmosphere. The precomposited powder has a plurality of powder particles, and each powder particle is formed of a matrix and reinforcing particles distributed within and encapsulated by the matrix. The matrix has a composition of a matrix metal such as molybdenum, hafnium, zirconium titanium, vanadium, niobium, tantalum, or tungsten, and a matrix non-metal of silicon, boron, or carbon. The reinforcement particle is silicon carbide, boron carbide, silicon nitride, or boron nitride.
    Type: Grant
    Filed: June 29, 2000
    Date of Patent: August 20, 2002
    Assignee: Plasma Technology, Inc.
    Inventor: Kamleshwar Upadhya
  • Thermal spray forming of molybdenum disilicide-silicon carbide composite material
    Patent number: 6106903
    Abstract: A mass of molybdenum disilicide-silicon carbide composite material is prepared by providing a mixture of molybdenum disilicide-silicon carbide precomposited powder, and plasma spraying the precomposited powder onto a substrate using argon-shrouded plasma spray deposition, to form a plasma-sprayed mass. The plasma-sprayed mass may be subsequently heat treated.
    Type: Grant
    Filed: March 1, 1999
    Date of Patent: August 22, 2000
    Assignee: Plasma Technology, Inc.
    Inventor: Kamleshwar Upadhya
  • Plasma energy recycle and conversion (PERC) reactor and process
    Patent number: 5762009
    Abstract: Plasma energy recycle and conversion (PERC) reactor and process for disposal of energetics such as solid rocket propellants, liquid rocket fuel, chemical agents such as nerve gas, industrial waste such as paint sludge, medical waste or any aqueous/organic liquid or slurry that is pumpable and for separation/consolidation/conversion of low-level radioactive waste or mixed waste incorporating an induction coupled plasma heat source, insulated primary and secondary reaction chambers and associated peripheral control, process and filter devices.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: June 9, 1998
    Assignees: Alliant Techsystems, Inc., Plasma Technology, Inc.
    Inventors: Millard M. Garrison, John S. Vavruska
  • Induction steam plasma torch for generating a steam plasma for treating a feed slurry
    Patent number: 5611947
    Abstract: Steam plasma reactor incorporating an induction steam plasma torch where superheated steam is generated and passed through an induction coil or coils to generate high temperature steam plasma for conversion and disposal of waste products such as low level radioactive waste, energetics, such as solid rocket propellants, liquid rocket fuel, chemical agents such as nerve gas, industrial waste such as paint sludge, hazardous chemical waste, medical waste and other general wastes in a downstream conversion reactor referred to as a plasma energy recycle and conversion (PERC) reactor.
    Type: Grant
    Filed: September 7, 1994
    Date of Patent: March 18, 1997
    Assignees: Alliant Techsystems, Inc., Plasma Technology, Inc.
    Inventor: John S. Vavruska