Joining particulate and whisker ceramic composites by plastic flow.
Joining of bulk ceramics by plastic flow has been demonstrated for several fine-grained ceramics. We have joined, for example, submicrometer 3 mol% Y2O3 partially stabilized ZrO{sub 2} (YSZ) and YSZ-toughened Al{sub 2}O{sub 3}. The interlayers in these cases consisted of dense, submicrometer-grain-sized pieces of ceramics that have been shown to exhibit superplastic flow. We have extended the joining work to include incorporation of 15 vol.% SiC or 20 vol.% TiC whiskers within the bond layer. Unlike YSZ/Al{sub 2}O{sub 3}, because of the presence of the whiskers, YSZ/Al{sub 2}O{sub 3}/SiC and YSZ/Al{sub 2}O{sub 3}/TiC do not deform superplastically. However, virtually perfect YSZ/Al{sub 2}O{sub 3} joints with and without whiskers could be made by compressing at 1300-1350 C and stresses of <20 MPa.
- Research Organization:
- Argonne National Laboratory (ANL)
- Sponsoring Organization:
- EE
- DOE Contract Number:
- AC02-06CH11357
- OSTI ID:
- 949475
- Report Number(s):
- ANL/ET/JA-41336
- Journal Information:
- Compos. Struct., Journal Name: Compos. Struct. Journal Issue: 1-4 ; Jul./Sep. 2002 Vol. 57; ISSN 0263-8223; ISSN COMSE2
- Country of Publication:
- United States
- Language:
- ENGLISH
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