Claims
- 1. A joined body of a first member made of a metal and a second member made of a ceramic or a cermet,wherein said joined body comprises a joining portion interposed between said first member and said second member for joining said first and second members, said joining portion comprising main phase contacting said first member and an intermediate ceramic composition layer contacting said second member and existing between said second member and said main phase, and said main phase comprising a porous bone structure with open pores and made of a sintered product of powder of a metal, and said main phase further comprising ceramic composition layer impregnated into said open pores in said porous bone structure each of said intermediate ceramic composition layer and said impregnated ceramic composition layer has a crystallinity of more than 50%.
- 2. The joined body of claim 1, wherein said intermediate ceramic composition layer and said impregnated ceramic composition layer contain a main component of said ceramic or said cerment constituting said second member.
- 3. The joined body of claim 1, wherein said metal constituting said porous bone structure contains a main component of said metal constituting said first member.
- 4. The joined body of claim 1, wherein said intermediate ceramic composition layer and said impregnated ceramic composition layer are made of ceramic materials comprising the same ingredient system.
- 5. The joined body of claim 1, wherein said porous bone structure has a porosity of open pores of not lower than 30% and not higher than 80%.
- 6. The joined body of claim 1, wherein each of said intermediate ceramic layer and said impregnated ceramic phase has a crystallinity of not lower than 60%.
- 7. The joined body of claim 6, wherein each of said intermediate ceramic layer and said impregnated ceramic phase has a crystallinity of not lower than 70%.
- 8. The joined body of claim 7, wherein each of said intermediate ceramic layer and said impregnated ceramic phase has a crystallinity of not lower than 80%.
- 9. The joined body of claim 1, wherein each of a ceramic constituting said intermediate ceramic composition layer and a ceramic constituting said impregnated ceramic composition layer comprises one or more oxide selected from the group consisting of Al2O3, Sc2O3, Y2O3, La2O3, Gd2O3, Dy2O3, Ho2O3, Tm2O3, SiO2, MoO2 and MoO3.
- 10. The joined body of claim 9, wherein each of a ceramic constituting said intermediate ceramic composition layer and a ceramic constituting said impregnated ceramic composition layer comprises three or more oxides selected from the group consisting of Al2O3, Sc2O3, Y2O3, La2O3, Gd2O3, Dy2O3, Ho2O3, Tm2O3, SiO2, MoO2 and MoO3.
- 11. The joined body of claim 10, wherein each ceramic has a content of SiO2 of not higher than 15 weight percent.
- 12. The joined body of claim 11, wherein each ceramic has a content of SiO2 of not lower than 5 ppm.
- 13. The joined body of claim 1, wherein said first member comprises one or more metal selected from the group consisting of molybdenum, tungsten, rhenium, niobium, tantalum and the alloys thereof.
- 14. The joined body of claim 1, wherein said second member comprises a ceramic selected from the group consisting of alumina, magnesia, yttria, lanthania and zirconia, or a cermet containing said ceramic.
- 15. The joined body of claim 1, wherein each of a material constituting said intermediate ceramic composition layer and a ceramic constituting said impregnated ceramic composition layer has a melting point not more than a temperature subtracted 200° C. from a melting point of a ceramic or a cerment constituting said second member.
Priority Claims (1)
Number |
Date |
Country |
Kind |
2000-200536 |
Jul 2000 |
JP |
|
CROSS REFERENCE TO RELATED APPLICATIONS
This application is a division of U.S application Ser. No. 09/847,058, filed May 1, 2001, now U.S. Pat. No. 6,642,654, which is a continuation-in-part of U.S. application Ser. No. 09/794,760, filed Feb. 27, 2001, now abandoned, which in turn is a continuation-in-part of U.S. application Ser. No. 09/631,419, filed Aug. 3, 2000, now U.S. Pat. No. 6,703,136, the entireties of which are incorporated herein by reference.
US Referenced Citations (5)
Number |
Name |
Date |
Kind |
4310773 |
Zukowski et al. |
Jan 1982 |
A |
4353623 |
Maier |
Oct 1982 |
A |
5404077 |
Eichelbrönner et al. |
Apr 1995 |
A |
5424608 |
Juengst et al. |
Jun 1995 |
A |
6465940 |
Ikeuchi et al. |
Oct 2002 |
B1 |
Foreign Referenced Citations (23)
Number |
Date |
Country |
0 452 275 |
Oct 1991 |
EP |
0 726 238 |
Aug 1996 |
EP |
0 751 549 |
Jan 1997 |
EP |
0 982 278 |
Mar 2000 |
EP |
220 173 |
Mar 1998 |
HU |
53-33209 |
Mar 1978 |
JP |
55-42228 |
Mar 1980 |
JP |
58-204880 |
Nov 1983 |
JP |
59-152275 |
Aug 1984 |
JP |
61-3809 |
Jan 1986 |
JP |
61-201676 |
Sep 1986 |
JP |
62-56380 |
Mar 1987 |
JP |
1-099775 |
Apr 1989 |
JP |
1-212283 |
Aug 1989 |
JP |
1-236573 |
Sep 1989 |
JP |
1-236575 |
Sep 1989 |
JP |
3-103369 |
Apr 1991 |
JP |
5-94945 |
Dec 1993 |
JP |
6-126472 |
May 1994 |
JP |
7-053278 |
Feb 1995 |
JP |
7-247188 |
Sep 1995 |
JP |
8-253373 |
Jan 1996 |
JP |
8-273616 |
Oct 1996 |
JP |
Non-Patent Literature Citations (2)
Entry |
Patent Abstracts of Japan, vol. 2000, No. 21, Aug. 3, 2001 (JP 2001 110340). |
Patent Abstracts of Japan, vol. 2000, No. 20, Jul. 10, 2001 (JP 2001 076678). |
Continuation in Parts (2)
|
Number |
Date |
Country |
Parent |
09/794760 |
Feb 2001 |
US |
Child |
09/847058 |
|
US |
Parent |
09/631419 |
Aug 2000 |
US |
Child |
09/794760 |
|
US |