Internal zone growth method for producing metal oxide metal eutectic composites

Patent · Tue Jan 01 00:00:00 EST 1980

OSTI ID:863707

Clark, Grady W ^[1]; Holder, John D ^[2]; Pasto, Arvid E ^[1]

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1. Oak Ridge, TN
2. Knoxville, TN

An improved method for preparing a cermet comprises preparing a compact having about 85 to 95 percent theoretical density from a mixture of metal and metal oxide powders from a system containing a eutectic composition, and inductively heating the compact in a radiofrequency field to cause the formation of an internal molten zone. The metal oxide particles in the powder mixture are effectively sized relative to the metal particles to permit direct inductive heating of the compact by radiofrequency from room temperature. Surface melting is prevented by external cooling or by effectively sizing the particles in the powder mixture.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4231796
• OSTI ID: 863707
• Country of Publication: United States
• Language: English

Related Subjects

internal
zone
growth
method
producing
metal
oxide
eutectic
composites
improved
preparing
cermet
comprises
compact
85
95
percent
theoretical
density
mixture
powders
containing
composition
inductively
heating
radiofrequency
field
formation
molten
particles
powder
effectively
sized
relative
permit
direct
inductive
temperature
surface
melting
prevented
external
cooling
sizing
metal particle
producing metal
eutectic composition
theoretical density
metal particles
improved method
metal oxide
oxide particles
oxide powder
oxide powders
powder mixture
permit direct
percent theoretical
comprises preparing
growth method
frequency field
oxide particle
/419/