Plasma spraying method for forming diamond and diamond-like coatings

Holcombe, Cressie E; Seals, Roland D; Price, R Eugene

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Title: Plasma spraying method for forming diamond and diamond-like coatings

Abstract

A method and composition for the deposition of a thick layer (10) of diamond or diamond-like material. The method includes high temperature processing wherein a selected composition (12) including at least glassy carbon is heated in a direct current plasma arc device to a selected temperature above the softening point, in an inert atmosphere, and is propelled to quickly quenched on a selected substrate (20). The softened or molten composition (18) crystallizes on the substrate (20) to form a thick deposition layer (10) comprising at least a diamond or diamond-like material. The selected composition (12) includes at least glassy carbon as a primary constituent (14) and may include at least one secondary constituent (16). Preferably, the secondary constituents (16) are selected from the group consisting of at least diamond powder, boron carbide (B.sub.4 C) powder and mixtures thereof.

Inventors:

Holcombe, Cressie E ^[1]; Seals, Roland D ^[2]; Price, R Eugene ^[3]

Farragut, TN
Oak Ridge, TN
Knoxville, TN

Issue Date:: 1997-01-01

Research Org.:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

OSTI Identifier:: 870980

Patent Number(s):: 5635254

Assignee:: Martin Marietta Energy Systems, Inc. (Oak Ridge, TN)

Patent Classifications (CPCs):: C - CHEMISTRY C23 - COATING METALLIC MATERIAL C23C - COATING METALLIC MATERIAL

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C - CHEMISTRY C23 - COATING METALLIC MATERIAL C23C - COATING METALLIC MATERIAL
C23C16/26 - Deposition of carbon only
C23C16/276 - {using plasma jets}
C23C16/278 - {doping or introduction of a secondary phase in the diamond}
C23C16/30 - Deposition of compounds, mixtures or solid solutions, e.g. borides, carbides, nitrides
C23C4/04 - characterised by the coating material

Show less

DOE Contract Number:: AC05-84OR21400

Resource Type:: Patent

Country of Publication:: United States

Language:: English

Subject:: plasma; spraying; method; forming; diamond; diamond-like; coatings; composition; deposition; thick; layer; 10; material; temperature; processing; selected; 12; including; glassy; carbon; heated; direct; current; device; softening; inert; atmosphere; propelled; quickly; quenched; substrate; 20; softened; molten; 18; crystallizes; form; comprising; primary; constituent; 14; secondary; 16; preferably; constituents; consisting; powder; boron; carbide; mixtures; thick layer; plasma spray; boron carbide; direct current; inert atmosphere; plasma spraying; glassy carbon; selected temperature; temperature process; selected substrate; diamond-like material; selected composition; diamond powder; spraying method; current plasma; /427/

Citation Formats


                    Holcombe, Cressie E, Seals, Roland D, and Price, R Eugene. Plasma spraying method for forming diamond and diamond-like coatings.  United States: N. p., 1997. 
        Web.

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                    Holcombe, Cressie E, Seals, Roland D, & Price, R Eugene. Plasma spraying method for forming diamond and diamond-like coatings.  United States.

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                    Holcombe, Cressie E, Seals, Roland D, and Price, R Eugene. Wed .  
        "Plasma spraying method for forming diamond and diamond-like coatings".  United States.  https://www.osti.gov/servlets/purl/870980.

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@article{osti_870980,

  title        = {Plasma spraying method for forming diamond and diamond-like coatings},

  author       = {Holcombe, Cressie E and Seals, Roland D and Price, R Eugene},

  abstractNote = {A method and composition for the deposition of a thick layer (10) of diamond or diamond-like material. The method includes high temperature processing wherein a selected composition (12) including at least glassy carbon is heated in a direct current plasma arc device to a selected temperature above the softening point, in an inert atmosphere, and is propelled to quickly quenched on a selected substrate (20). The softened or molten composition (18) crystallizes on the substrate (20) to form a thick deposition layer (10) comprising at least a diamond or diamond-like material. The selected composition (12) includes at least glassy carbon as a primary constituent (14) and may include at least one secondary constituent (16). Preferably, the secondary constituents (16) are selected from the group consisting of at least diamond powder, boron carbide (B.sub.4 C) powder and mixtures thereof.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {1997},

  month        = {1}

}

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Works referenced in this record:

The physical and chemical character of graphite
journal, March 1963

Tee, Peter A. H.; Tonge, Brian L.
Journal of Chemical Education, Vol. 40, Issue 3
https://doi.org/10.1021/ed040p117

Single-Crystal Diffraction Patterns from Vitreous Carbon
journal, October 1974

Whittaker, A. Greenville; Tooper, B.
Journal of the American Ceramic Society, Vol. 57, Issue 10
https://doi.org/10.1111/j.1151-2916.1974.tb11378.x

Vitreous carbon — A new form of carbon
journal, November 1967

Cowlard, F. C.; Lewis, J. C.
Journal of Materials Science, Vol. 2, Issue 6
https://doi.org/10.1007/BF00752216

Newer Forms of Carbon and their Uses
journal, January 1969

Cahn, R. W.; Harris, B.
Nature, Vol. 221, Issue 5176
https://doi.org/10.1038/221132a0

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Similar Records

Title: Plasma spraying method for forming diamond and diamond-like coatings

Abstract

Citation Formats

The physical and chemical character of graphite journal, March 1963

Single-Crystal Diffraction Patterns from Vitreous Carbon journal, October 1974

Vitreous carbon — A new form of carbon journal, November 1967

Newer Forms of Carbon and their Uses journal, January 1969

The physical and chemical character of graphite
journal, March 1963

Single-Crystal Diffraction Patterns from Vitreous Carbon
journal, October 1974

Vitreous carbon — A new form of carbon
journal, November 1967

Newer Forms of Carbon and their Uses
journal, January 1969