skip to main content
DOE Patents title logo U.S. Department of Energy
Office of Scientific and Technical Information

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:
 [1];  [2];  [3]
  1. Farragut, TN
  2. Oak Ridge, TN
  3. Knoxville, TN
Issue Date:
Research Org.:
LOCKHEED MARTIN ENRGY SYST INC
OSTI Identifier:
870980
Patent Number(s):
5635254
Assignee:
Martin Marietta Energy Systems, Inc. (Oak Ridge, TN)
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.
Holcombe, Cressie E, Seals, Roland D, & Price, R Eugene. Plasma spraying method for forming diamond and diamond-like coatings. United States.
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.
@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}
}

Patent:

Save / Share: