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US 4,396,445 AGranted
Method of making a ceramic turbine rotor unit
AssigneeNissan Motor Co., Ltd.
InventorsNaoto Sasaki, Kenji Nakayama, Tadayoshi Hirao
Life of this patent
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Abstract
The turbine rotor unit comprises a ceramic rotor and a ceramic shaft. Connection or bonding of the rotor and the shaft is made by applying a slip of ceramic material to engaging sections of the rotor and the shaft and baking them for solidification of the slip. If metal-silicone is used as a material for the rotor and the shaft, the connection or bonding of them can be made without the slip.
Claims3
A method of producing a turbine rotor unit of ceramic comprising the procedural combination of steps of:
- (a) separately preparing first and second articles from a ceramic material in green condition which are respectively formed into a rotor proper and a shaft proper, said first article having therethrough a bore defined by a bore-bounding wall and having a size which matches substantially with a surface of an end of said second article;
- (b) heating said first and second articles to allow them to be incompletely sintered;
- (c) applying a slip of the same ceramic material as the first and second articles to at least one of the bore-bounding wall of said first article and the surface of said end of said second article;
- (d) disposing said end of said second article into said bore of said first article in such a manner that the surface of said end of said second article contacts with the bore-bounding wall of said first article;
- and
- (e) firing the temporarily connected first and second articles to allow the same to be sintered so that upon completion of this step, said first and second articles thus sintered are securely bonded with each other.
3 more elements
Dependencies are inferred from the claim text.