Stock material or miscellaneous articles – All metal or with adjacent metals – Macroscopically anomalous interface between layers
Patent
1989-06-29
1990-10-09
Zimmerman, John J.
Stock material or miscellaneous articles
All metal or with adjacent metals
Macroscopically anomalous interface between layers
29447, 29238, 29800, 403 30, B23P 1902, F16B 400
Patent
active
049620029
ABSTRACT:
Ceramic-metal composite bodies and a process for the production thereof are disclosed. The ceramic-metal composite body includes a metallic member and a ceramic member which are integrally joined together by fitting a projection formed on the ceramic member to a recess formed in the metallic member. The projection of the ceramic member is fitted and joined into the recess of the metallic member in a vessel of which the inside is kept at an atmosphere having a pressure lower than an atmospheric pressure. The pressure of air remaining in a space left between the recess and the fitted projection is lower than that of the air in the space when the projection is fitted into the recess in the atmospheric pressure. An apparatus for fitting and joining the projection of the ceramic member to the recess of the metallic member is also disclosed, which includes a pressure-reducible vessel which is provided with a space for receiving at least the projection of the ceramic member and the recess of the metallic member, a sealing structure including O-rings or the like, a pipe opening for exhausting air inside the vessel, and a movable push rod for pressing and fitting the projection of the ceramic member into the recess of the metallic member.
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Nakasuji Yoshizumi
Yoshida Akihiko
NGK Insulators Ltd.
Zimmerman John J.
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