Brazing graphite to graphite

Patent · Thu Jan 01 04:00:00 EST 1976

OSTI ID:862485

Peterson, George R ^[1]

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1. Andersonville, TN

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.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN
• DOE Contract Number: W-7405-ENG-26
• Assignee: United States of America as represented by United States Energy (Washington, DC)
• Patent Number(s): US 3946932
• OSTI ID: 862485
• Country of Publication: United States
• Language: English

Related Subjects

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annealing
annealing step
brazing
brazing graphite
brazing material
carbide
diffuses
dispersed
dissolved
employing
exhibiting
faying
faying surfaces
fine
form
found
graphite
joined
joint
material
melted
metal-free
molybdenum
molybdenum powder
operation
parent
placed
powder
precipitates
produce
properties
properties similar
provide
replacing
similar
step
subjected
surfaces
thereafter
virtually