Denso Corporation

Yasuyuki Ookouchi

Hideaki Shirai

Yasunori Kawamoto

Tomohiro Shimizu

A method of manufacturing a joint body of a ceramic body and a metal body includes a step of joining them together by passing a current to an abutment surface between them. The joining step includes a step of heating up the abutment surface to a temperature T1 within a temperature range between (Tr-220)&#xb0; C. and (Tr-50)&#xb0; C. in a period longer than 10 seconds, Tr being a recrystallization temperature of the metal body, a step of heating the abutment surface for a period longer than 5 seconds at a temperature T2 within a temperature range between Tm&#xd7;0.3&#xb0; C. and Tm&#xd7;0.45&#xb0; C., Tm being a melting point of the metal body, and a step of heating the abutment surface for a period longer than 3 seconds at a heating temperature higher than Tm&#xd7;0.48&#xb0; C. and lower than Tm&#xd7;0.6&#xb0; C.

Method of manufacturing joint body of conductive ceramic body and metal body

A method for producing a bonded body of ceramic and metal bodies includes stacking a ceramic body, metal body, gap layer capable of preventing oxidation and hindering heat conduction, first intermediate layer and second intermediate layer with the gap layer between the ceramic body and the metal body in the stacking direction. The first intermediate layer is between the ceramic body and gap layer, and the second intermediate layer is between the gap layer and metal body, linear expansion coefficients of the first and second intermediate layers being between those of the ceramic body and the metal body. Diffusion bonding is performed between the ceramic body and the first intermediate layer, and between the metal body and the second intermediate layer simultaneously. The gap layer is then removed from between the first and second intermediate layers. The first and second intermediate layers are then bonded to each other.

Growing community of inventors

Toyota, Japan

Yasuyuki Ookouchi