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Title: Carbon-free induction furnace

Abstract

An induction furnace for melting and casting highly pure metals and alloys such as uranium and uranium alloys in such a manner as to minimize contamination of the melt by carbon derived from the materials and the environment within the furnace. The subject furnace is constructed of carbon free materials and is housed within a conventional vacuum chamber. The furnace comprises a ceramic oxide crucible for holding the charge of metal or alloy. The heating of the crucible is achieved by a plasma-sprayed tungsten susceptor surrounding the crucible which, in turn, is heated by an RF induction coil separated from the susceptor by a cylinder of inorganic insulation. The furnace of the present invention is capable of being rapidly cycled from ambient temperatures to about 1650.degree. C. for effectively melting uranium and uranium alloys without the attendant carbon contamination problems previously encountered when using carbon-bearing furnace materials.

Inventors:
 [1];  [1];  [2]
  1. (Knoxville, TN)
  2. (Norris, TN)
Issue Date:
Research Org.:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN
OSTI Identifier:
865659
Patent Number(s):
4550412
Assignee:
United States of America as represented by United States (Washington, DC) ORNL
DOE Contract Number:  
W-7405-ENG-26
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
carbon-free; induction; furnace; melting; casting; highly; pure; metals; alloys; uranium; manner; minimize; contamination; melt; carbon; derived; materials; environment; subject; constructed; free; housed; conventional; vacuum; chamber; comprises; ceramic; oxide; crucible; holding; charge; metal; alloy; heating; achieved; plasma-sprayed; tungsten; susceptor; surrounding; heated; rf; coil; separated; cylinder; inorganic; insulation; capable; rapidly; cycled; ambient; temperatures; 1650; degree; effectively; attendant; previously; encountered; carbon-bearing; uranium alloy; induction coil; vacuum chamber; ambient temperature; ceramic oxide; uranium alloys; highly pure; ambient temperatures; carbon contamination; pure metal; pure metals; minimize contamination; furnace comprises; conventional vacuum; induction furnace; carbon free; /373/219/

Citation Formats

Holcombe, Cressie E., Masters, David R., and Pfeiler, William A. Carbon-free induction furnace. United States: N. p., 1985. Web.
Holcombe, Cressie E., Masters, David R., & Pfeiler, William A. Carbon-free induction furnace. United States.
Holcombe, Cressie E., Masters, David R., and Pfeiler, William A. Tue . "Carbon-free induction furnace". United States. https://www.osti.gov/servlets/purl/865659.
@article{osti_865659,
title = {Carbon-free induction furnace},
author = {Holcombe, Cressie E. and Masters, David R. and Pfeiler, William A.},
abstractNote = {An induction furnace for melting and casting highly pure metals and alloys such as uranium and uranium alloys in such a manner as to minimize contamination of the melt by carbon derived from the materials and the environment within the furnace. The subject furnace is constructed of carbon free materials and is housed within a conventional vacuum chamber. The furnace comprises a ceramic oxide crucible for holding the charge of metal or alloy. The heating of the crucible is achieved by a plasma-sprayed tungsten susceptor surrounding the crucible which, in turn, is heated by an RF induction coil separated from the susceptor by a cylinder of inorganic insulation. The furnace of the present invention is capable of being rapidly cycled from ambient temperatures to about 1650.degree. C. for effectively melting uranium and uranium alloys without the attendant carbon contamination problems previously encountered when using carbon-bearing furnace materials.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1985},
month = {1}
}

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