| abstract |
The invention provides a joined body of a first member 7 made of a metal and a second member 4 made of a ceramic or a cermet. The joined body comprises a joining portion 6 interposed between the first member 7 and the second member 4 for joining the member 7 and the member 4 . The joining portion 6 comprises main phase 14 contacting the first member 7 and an intermediate ceramic layer 13 existing between the second member and the main phase 14 as well as contacting the second member 4 . The main phase 14 is composed of a porous bone structure, with open pores and made of a sintered product of metal powder, and ceramic phase impregnated into the open pores in the porous bone structure. Herewith, the joined structure has resistance to fatigue and fracture, even when the structure is subjected to repeated thermal cycles between a high temperature, for example 1000° C. or higher, and room temperature. |