Cermets and method for making same

Aaron, W Scott; Kinser, Donald L; Quinby, Thomas C

Title: Cermets and method for making same

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Abstract

The present invention is directed to a method for making a wide variety of general-purpose cermets and for radioactive waste disposal from ceramic powders prepared from urea-dispersed solutions containing various metal values. The powders are formed into a compact and subjected to a rapid temperature increase in a reducing atmosphere. During this reduction, one or more of the more readily reducible oxides in the compact is reduced to a selected substoichiometric state at a temperature below the eutectic phase for that particular oxide or oxides and then raised to a temperature greater than the eutectic temperature to provide a liquid phase in the compact prior to the reduction of the liquid phase forming oxide to solid metal. This liquid phase forms at a temperature below the melting temperature of the metal and bonds together the remaining particulates in the cermet to form a solid polycrystalline cermet.

Inventors:

Aaron, W Scott ^[1]; Kinser, Donald L ^[2]; Quinby, Thomas C ^[3]

Clinton, TN
Brentwood, TN
Kingston, TN

Issue Date:: 1983-01-01

Research Org.:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

OSTI Identifier:: 864554

Patent Number(s):: 4383855

Assignee:: United States of America as represented by United States (Washington, DC)

Patent Classifications (CPCs):: Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10S - TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

C - CHEMISTRY C22 - METALLURGY C22C - ALLOYS

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Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10S - TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
Y10S75/951 - Oxide containing, e.g. dispersion strengthened

C - CHEMISTRY C22 - METALLURGY C22C - ALLOYS
C22C29/12 - based on oxides

G - PHYSICS G21 - NUCLEAR PHYSICS G21F - PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT
G21F9/302 - {in an inorganic matrix}

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Resource Type:: Patent

Country of Publication:: United States

Language:: English

Subject:: cermets; method; directed; wide; variety; general-purpose; radioactive; waste; disposal; ceramic; powders; prepared; urea-dispersed; solutions; containing; various; metal; values; formed; compact; subjected; rapid; temperature; increase; reducing; atmosphere; reduction; readily; reducible; oxides; reduced; selected; substoichiometric; below; eutectic; phase; particular; oxide; raised; provide; liquid; prior; forming; solid; forms; melting; bonds; remaining; particulates; cermet; form; polycrystalline; waste disposal; ceramic powder; metal values; ceramic powders; reducing atmosphere; melting temperature; temperature below; liquid phase; radioactive waste; solutions containing; wide variety; solid metal; rapid temperature; various metal; eutectic temperature; temperature increase; /419/75/252/976/

Citation Formats


                    Aaron, W Scott, Kinser, Donald L, and Quinby, Thomas C. Cermets and method for making same.  United States: N. p., 1983. 
        Web.

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                    Aaron, W Scott, Kinser, Donald L, & Quinby, Thomas C. Cermets and method for making same.  United States.

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                    Aaron, W Scott, Kinser, Donald L, and Quinby, Thomas C. Sat .  
        "Cermets and method for making same".  United States.  https://www.osti.gov/servlets/purl/864554.

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@article{osti_864554,

  title        = {Cermets and method for making same},

  author       = {Aaron, W Scott and Kinser, Donald L and Quinby, Thomas C},

  abstractNote = {The present invention is directed to a method for making a wide variety of general-purpose cermets and for radioactive waste disposal from ceramic powders prepared from urea-dispersed solutions containing various metal values. The powders are formed into a compact and subjected to a rapid temperature increase in a reducing atmosphere. During this reduction, one or more of the more readily reducible oxides in the compact is reduced to a selected substoichiometric state at a temperature below the eutectic phase for that particular oxide or oxides and then raised to a temperature greater than the eutectic temperature to provide a liquid phase in the compact prior to the reduction of the liquid phase forming oxide to solid metal. This liquid phase forms at a temperature below the melting temperature of the metal and bonds together the remaining particulates in the cermet to form a solid polycrystalline cermet.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {1983},

  month        = {1}

}

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