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Title: Non-graphite crucible for high temperature applications

A multi-piece crucible for high temperature applications comprises a tubular side wall member having a lip on the inside surface and a bottom member or members forming a container for containing a melt of a material during a high temperature melt-casting operations. The multi-piece design prevents cracking of the crucible or leakage of the melt from the crucible during the melt-casting operation. The lip of the tubular member supports the bottom member. The contacting surfaces where the lip of the tubular side wall member contacts the bottom member of the multi-piece crucible contains a ceramic sealing material. The ceramic sealing material forms a seal sufficient to prevent the melt of the material from leaking out of the multi-piece crucible during the melt-casting process. The multi-piece crucible is made of a material which is chemically inert to the melt and has structural integrity at the melting point temperature of the melt, or of a material coated with such a material. The multi-piece crucible is contained in a thermal can assembly of a high temperature induction furnace during a high temperature melt-casting operation. One embodiment of the multi-piece crucible comprises a tubular member having a vertical slot filled with a ceramic sealingmore » material to provide expansion of the tubular member without cracking during the high temperature melt-casting operation. 9 figs.« less
Inventors:
;
Issue Date:
OSTI Identifier:
170475
Assignee:
Martin Marietta Energy Systems, Inc., Oak Ridge, TN (United States) PTO; SCA: 360101; 360201; 360601; PA: EDB-96:027598; SN: 96001517589
Patent Number(s):
US 5,482,257/A/
Application Number:
PAN: 8-186,837
Contract Number:
AC05-84OR21400
Resource Relation:
Other Information: PBD: 9 Jan 1996
Research Org:
Lockheed Martin Energy Syst Inc
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CRUCIBLES; DESIGN; MATERIALS; CASTING; HEAT RESISTANT MATERIALS; THERMAL EXPANSION; CRACK PROPAGATION; FOUNDRIES

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