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Title: Brazing graphite to graphite

Abstract

Graphite is joined to graphite by employing both fine molybdenum powder as the brazing material and an annealing step that together produce a virtually metal-free joint exhibiting properties similar to those found in the parent graphite. Molybdenum powder is placed between the faying surfaces of two graphite parts and melted to form molybdenum carbide. The joint area is thereafter subjected to an annealing operation which diffuses the carbide away from the joint and into the graphite parts. Graphite dissolved by the dispersed molybdenum carbide precipitates into the joint area, replacing the molybdenum carbide to provide a joint of virtually graphite.

Inventors:
 [1]
  1. Andersonville, TN
Issue Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
OSTI Identifier:
862485
Patent Number(s):
3946932
Assignee:
United States of America as represented by United States Energy (Washington, DC)
Patent Classifications (CPCs):
C - CHEMISTRY C04 - CEMENTS C04B - LIME, MAGNESIA
B - PERFORMING OPERATIONS B23 - MACHINE TOOLS B23K - SOLDERING OR UNSOLDERING
DOE Contract Number:  
W-7405-ENG-26
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
brazing; graphite; joined; employing; fine; molybdenum; powder; material; annealing; step; produce; virtually; metal-free; joint; exhibiting; properties; similar; found; parent; placed; faying; surfaces; melted; form; carbide; thereafter; subjected; operation; diffuses; dissolved; dispersed; precipitates; replacing; provide; brazing material; annealing step; molybdenum powder; properties similar; faying surfaces; brazing graphite; /228/

Citation Formats

Peterson, George R. Brazing graphite to graphite. United States: N. p., 1976. Web.
Peterson, George R. Brazing graphite to graphite. United States.
Peterson, George R. Thu . "Brazing graphite to graphite". United States. https://www.osti.gov/servlets/purl/862485.
@article{osti_862485,
title = {Brazing graphite to graphite},
author = {Peterson, George R},
abstractNote = {Graphite is joined to graphite by employing both fine molybdenum powder as the brazing material and an annealing step that together produce a virtually metal-free joint exhibiting properties similar to those found in the parent graphite. Molybdenum powder is placed between the faying surfaces of two graphite parts and melted to form molybdenum carbide. The joint area is thereafter subjected to an annealing operation which diffuses the carbide away from the joint and into the graphite parts. Graphite dissolved by the dispersed molybdenum carbide precipitates into the joint area, replacing the molybdenum carbide to provide a joint of virtually graphite.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1976},
month = {1}
}

Patent:

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