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Title: Coating formulation and method for refinishing the surface of surface-damaged graphite articles

Abstract

The described development is directed to a coating formulation for filling surface irregularities in graphite articles such as molds, crucibles, and matched die sets used in high-temperature metallurgical operations. The coating formulation of the present invention is formed of carbon black flour, thermosetting resin and a solvent for the resin. In affixing the coating to the article, the solvent is evaporated, the resin cured to bond the coating to the surface of the article and then pyrolyzed to convert the resin to carbon. Upon completion of the pyrolysis step, the coating is shaped and polished to provide the article with a surface restoration that is essentially similar to the original or desired surface finish without the irregularity.

Inventors:
;
Issue Date:
OSTI Identifier:
7166838
Patent Number(s):
4786524 A
Application Number:
PPN: US 7-071102
Assignee:
Dept. of Energy, Washington, DC (United States) PTO; EDB-94-116955
DOE Contract Number:  
W-7405-ENG-26
Resource Type:
Patent
Resource Relation:
Patent File Date: 8 Jul 1987
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; COATINGS; CHEMICAL COMPOSITION; DEPOSITION; GRAPHITE; SURFACE FINISHING; CARBON BLACK; PYROLYSIS; RESINS; ROUGHNESS; CARBON; CHEMICAL REACTIONS; DECOMPOSITION; ELEMENTAL MINERALS; ELEMENTS; MINERALS; NONMETALS; ORGANIC COMPOUNDS; ORGANIC POLYMERS; PETROCHEMICALS; PETROLEUM PRODUCTS; POLYMERS; SURFACE PROPERTIES; THERMOCHEMICAL PROCESSES; 360601* - Other Materials- Preparation & Manufacture

Citation Formats

Ardary, Z.L., and Benton, S.T. Coating formulation and method for refinishing the surface of surface-damaged graphite articles. United States: N. p., 1988. Web.
Ardary, Z.L., & Benton, S.T. Coating formulation and method for refinishing the surface of surface-damaged graphite articles. United States.
Ardary, Z.L., and Benton, S.T. Tue . "Coating formulation and method for refinishing the surface of surface-damaged graphite articles". United States.
@article{osti_7166838,
title = {Coating formulation and method for refinishing the surface of surface-damaged graphite articles},
author = {Ardary, Z.L. and Benton, S.T.},
abstractNote = {The described development is directed to a coating formulation for filling surface irregularities in graphite articles such as molds, crucibles, and matched die sets used in high-temperature metallurgical operations. The coating formulation of the present invention is formed of carbon black flour, thermosetting resin and a solvent for the resin. In affixing the coating to the article, the solvent is evaporated, the resin cured to bond the coating to the surface of the article and then pyrolyzed to convert the resin to carbon. Upon completion of the pyrolysis step, the coating is shaped and polished to provide the article with a surface restoration that is essentially similar to the original or desired surface finish without the irregularity.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1988},
month = {11}
}