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Title: Method and apparatus for producing a carbon based foam article having a desired thermal-conductivity gradient

Abstract

A carbon based foam article is made by heating the surface of a carbon foam block to a temperature above its graphitizing temperature, which is the temperature sufficient to graphitize the carbon foam. In one embodiment, the surface is heated with infrared pulses until heat is transferred from the surface into the core of the foam article such that the graphitizing temperature penetrates into the core to a desired depth below the surface. The graphitizing temperature is maintained for a time sufficient to substantially entirely graphitize the portion of the foam article from the surface to the desired depth below the surface. Thus, the foam article is an integral monolithic material that has a desired conductivity gradient with a relatively high thermal conductivity in the portion of the core that was graphitized and a relatively low thermal conductivity in the remaining portion of the foam article.

Inventors:
 [1];  [2]
  1. Knoxville, TN
  2. Sanford, NC
Issue Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1014537
Patent Number(s):
7670682
Application Number:
US Patent Application 11/862,325
Assignee:
UT-Battelle, LLC (Oak Ridge, TN)
Patent Classifications (CPCs):
C - CHEMISTRY C04 - CEMENTS C04B - LIME, MAGNESIA
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10T - TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
DOE Contract Number:  
AC05-00OR22725
Resource Type:
Patent
Country of Publication:
United States
Language:
English

Citation Formats

Klett, James W, and Cameron, Christopher Stan. Method and apparatus for producing a carbon based foam article having a desired thermal-conductivity gradient. United States: N. p., 2010. Web.
Klett, James W, & Cameron, Christopher Stan. Method and apparatus for producing a carbon based foam article having a desired thermal-conductivity gradient. United States.
Klett, James W, and Cameron, Christopher Stan. Tue . "Method and apparatus for producing a carbon based foam article having a desired thermal-conductivity gradient". United States. https://www.osti.gov/servlets/purl/1014537.
@article{osti_1014537,
title = {Method and apparatus for producing a carbon based foam article having a desired thermal-conductivity gradient},
author = {Klett, James W and Cameron, Christopher Stan},
abstractNote = {A carbon based foam article is made by heating the surface of a carbon foam block to a temperature above its graphitizing temperature, which is the temperature sufficient to graphitize the carbon foam. In one embodiment, the surface is heated with infrared pulses until heat is transferred from the surface into the core of the foam article such that the graphitizing temperature penetrates into the core to a desired depth below the surface. The graphitizing temperature is maintained for a time sufficient to substantially entirely graphitize the portion of the foam article from the surface to the desired depth below the surface. Thus, the foam article is an integral monolithic material that has a desired conductivity gradient with a relatively high thermal conductivity in the portion of the core that was graphitized and a relatively low thermal conductivity in the remaining portion of the foam article.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2010},
month = {3}
}

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