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Title: Internal zone growth method for producing metal oxide metal eutectic composites

Abstract

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.

Inventors:
 [1];  [2];  [1]
  1. (Oak Ridge, TN)
  2. (Knoxville, TN)
Issue Date:
Research Org.:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN
OSTI Identifier:
863707
Patent Number(s):
4231796
Assignee:
United States of America as represented by United States (Washington, DC) ORNL
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
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/

Citation Formats

Clark, Grady W., Holder, John D., and Pasto, Arvid E. Internal zone growth method for producing metal oxide metal eutectic composites. United States: N. p., 1980. Web.
Clark, Grady W., Holder, John D., & Pasto, Arvid E. Internal zone growth method for producing metal oxide metal eutectic composites. United States.
Clark, Grady W., Holder, John D., and Pasto, Arvid E. Tue . "Internal zone growth method for producing metal oxide metal eutectic composites". United States. https://www.osti.gov/servlets/purl/863707.
@article{osti_863707,
title = {Internal zone growth method for producing metal oxide metal eutectic composites},
author = {Clark, Grady W. and Holder, John D. and Pasto, Arvid E.},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1980},
month = {1}
}

Patent:

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