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

Abstract

A method and composition is disclosed for the deposition of a thick layer of diamond or diamond-like material. The method includes high temperature processing wherein a selected composition 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. The softened or molten composition crystallizes on the substrate to form a thick deposition layer comprising at least a diamond or diamond-like material. The selected composition includes at least glassy carbon as a primary constituent and may include at least one secondary constituent. Preferably, the secondary constituents are selected from the group consisting of at least diamond powder, boron carbide (B{sub 4}C) powder and mixtures thereof. 9 figs.

Inventors:
; ;
Issue Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
489101
Patent Number(s):
5635254
Application Number:
PAN: 8-361,997
Assignee:
Martin Marietta Energy Systems, Inc., Oak Ridge, TN (United States)
DOE Contract Number:  
AC05-84OR21400
Resource Type:
Patent
Resource Relation:
Other Information: PBD: 3 Jun 1997
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; DIAMONDS; PLASMA ARC SPRAYING; CHEMICAL COMPOSITION; CRYSTALLIZATION; COATINGS

Citation Formats

Holcombe, C E, Seals, R D, and Price, R E. Plasma spraying method for forming diamond and diamond-like coatings. United States: N. p., 1997. Web.
Holcombe, C E, Seals, R D, & Price, R E. Plasma spraying method for forming diamond and diamond-like coatings. United States.
Holcombe, C E, Seals, R D, and Price, R E. Tue . "Plasma spraying method for forming diamond and diamond-like coatings". United States.
@article{osti_489101,
title = {Plasma spraying method for forming diamond and diamond-like coatings},
author = {Holcombe, C E and Seals, R D and Price, R E},
abstractNote = {A method and composition is disclosed for the deposition of a thick layer of diamond or diamond-like material. The method includes high temperature processing wherein a selected composition 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. The softened or molten composition crystallizes on the substrate to form a thick deposition layer comprising at least a diamond or diamond-like material. The selected composition includes at least glassy carbon as a primary constituent and may include at least one secondary constituent. Preferably, the secondary constituents are selected from the group consisting of at least diamond powder, boron carbide (B{sub 4}C) powder and mixtures thereof. 9 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1997},
month = {6}
}