Title:
DISSOLUTION OF CERAMIC MATEIAL
Document Type and Number:
Japanese Patent JPS5964136
Kind Code:
A
Abstract:
Ceramic core materials are selectively dissolved from light metal, e.g. Aluminium or light alloy, e.g. Aluminium alloy castings which are themselves susceptible to attack by caustic alkali solutions, by providing the core material with a substance containing Hydrogen donor group which is capable of producing nascent hydrogen and contacting the core with fused anhydrous caustic alkalis. By this means Silica cores can be removed from Aluminium alloy castings, or a ceramic containing a hydrogen donor group can be selectively dissolved from one that does not, e.g. a Silica disposable pattern from within an Alumina mould containing an integral Alumina core.
Inventors:
DEIBITSUDO MIRUZU
Application Number:
JP16309883A
Publication Date:
April 12, 1984
Filing Date:
September 05, 1983
Export Citation:
Assignee:
ROLLS ROYCE
International Classes:
B22D25/02; B22C1/00; B22C1/02; B22C9/10; B22D29/00; C04B35/622; (IPC1-7): B22C1/00; B22D25/02; C04B35/00
Attorney, Agent or Firm:
Kazuo Sato
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