Accession Number : ADD017296

Title :   Self-Supporting Diamond Filaments.

Descriptive Note : Patent, Filed 6 Jun 91, patented 20 Dec 94,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Morrish, Arthur A ; Natishan, Paul M ; Maruyama, Benji ; Pehrsson, Pehr E

Report Date : 20 Dec 1994

Pagination or Media Count : 7

Abstract : Filamentous substrates are coated with diamond by a chemical vapor deposition process. The substrate may then be etched away to form a diamond filament. In a preferred embodiment, the substrate is copper-coated graphite. The copper initially passivates the graphite, permitting diamond nucleation thereon. As deposition continues, the copper-coated graphite is etched away by the active hydrogen used in the deposition process. As a result a substrateless diamond tubule is formed. Diamond-coated and diamond filaments are useful as reinforcement materials for composites, as filtration media in chemical and purification processes, in biomedical applications as probes and medicinal dispensers, and in such esoteric areas as chaff media for jamming RF frequencies. (jg)

Descriptors :   *DIAMONDS, *CHEMICAL VAPOR DEPOSITION, *FILAMENTS, *PATENTS, *SELF SUPPORTING STRUCTURES, GRAPHITE, SUBSTRATES, NUCLEATION, ETCHING, HYDROGEN, COATINGS, MEDICINE, PURIFICATION, COPPER, CHEMICAL REACTIONS, TUBULAR STRUCTURES, JAMMING, MEDIA, RADIOFREQUENCY, CHAFF, REINFORCING MATERIALS, BIOMEDICINE, DISPENSERS, FILTRATION

Subject Categories : Inorganic Chemistry
      Physical Chemistry
      Coatings, Colorants and Finishes
      Laminates and Composite Materials

Distribution Statement : APPROVED FOR PUBLIC RELEASE