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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.« less
Inventors:
 [1];  [2]
  1. (Knoxville, TN)
  2. (Norris, TN)
Issue Date:
OSTI Identifier:
870237
Assignee:
Martin Marietta Energy Systems, Inc. (Oak Ridge, TN) ORNL
Patent Number(s):
US 5482257
Contract Number:
AC05-84OR21400
Research Org:
LOCKHEED MARTIN ENRGY SYST INC
Country of Publication:
United States
Language:
English
Subject:
non-graphite; crucible; temperature; applications; multi-piece; comprises; tubular; wall; lip; inside; surface; bottom; forming; container; containing; melt; material; melt-casting; operations; design; prevents; cracking; leakage; operation; supports; contacting; surfaces; contacts; contains; ceramic; sealing; forms; seal; sufficient; prevent; leaking; process; chemically; inert; structural; integrity; melting; coated; contained; thermal; assembly; induction; furnace; embodiment; vertical; slot; filled; provide; expansion; ceramic sealing; temperature applications; chemically inert; sealing material; inside surface; structural integrity; contacting surfaces; multi-piece crucible; casting process; material forms; provide expansion; applications comprises; casting operation; non-graphite crucible; contacting surface; vertical slot; induction furnace; temperature induction; ceramic seal; temperature application; crucible comprises; /266/432/

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