Claims
- 1. A process for producing a ceramic-metal composite body by integrally joining a projection formed on a ceramic member to a recess formed in a metallic member through a fitting technique selected from the group consisting of press fitting, shrinkage fitting, expansion fitting, and a combination thereof, said process comprising fitting and joining the projection of the ceramic member into the recess of the metallic member while said members are disposed in a vessel maintained in an atmosphere having a pressure of not more than 400 Torr.
- 2. A ceramic-metal composite body comprising a ceramic member with a projection formed thereon and a metallic member with a recess formed therein, said projection being integrally joined to said recess through a fitting while the members are disposed in a vessel maintained in an atmosphere having a pressure of not more than 400 Torr, wherein a pressure of air remaining in a space between said recess and said projection fitted therein is lower than a pressure of air remaining in said space when the fitting is preformed in said atmospheric pressure.
- 3. A ceramic-metal composite body according to claim 2, wherein said composite body is a rotary shaft of a rotor selected from the group consisting of a turbocharger and a gas turbine.
- 4. A method of using an apparatus for joining a projection formed on a ceramic member to a recess in a metallic member,
- said apparatus comprising:
- (i) a sealing vessel consisting essentially of a unitary body which defines an internal volume for receiving at least the projection of the ceramic member and the recess of the metallic member, and a vessel lid sealed to an open top portion of said vessel body via a first O-ring member;
- (ii) a movable push rod for pressing and fitting the projection of the ceramic member into the recess member of the metallic member, said push rod being slidably supported through said vessel lid and being operable in a single, constant axial direction which is coaxial with said projection and said recess, said push rod being sealed to said vessel lid via a second O-ring member; and
- (iii) an exhausting pipe opening for exhausting air inside said internal volume;
- said method comprising:
- (a) maintaining an atmosphere contained in said internal volume at a pressure of not more than 400 Torr; and
- (b) joining the projection of the ceramic member to the recess of the metallic member by pressing the projection into the recess.
Priority Claims (1)
Number |
Date |
Country |
Kind |
61-285974 |
Dec 1986 |
JPX |
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Parent Case Info
This is a continuation of application Ser. No. 07/125,361 filed Nov. 25, 1987, now abandoned.
US Referenced Citations (15)
Foreign Referenced Citations (5)
Number |
Date |
Country |
0139406 |
May 1985 |
EPX |
0142334 |
May 1985 |
EPX |
683859 |
Nov 1939 |
DE2 |
1427284 |
Mar 1976 |
GBX |
2173138 |
Oct 1986 |
GBX |
Non-Patent Literature Citations (4)
Entry |
Japanese Patent Appln. Laid Open No. 60-77,180. |
Japanese Utility Model Appln. Laid-Open No. 61-43,901. |
Japanese Utility Model Appln. Laid-Open No. 60-45,833. |
Japanese Utility Model Appln. Laid-Open No. 59-8,730. |
Continuations (1)
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Number |
Date |
Country |
Parent |
125361 |
Nov 1987 |
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