Metal/Ceramic Interfaces: Relationships Between Structure and Chemistry
Abstract
Studies have been conducted on interfaces between Al2O3, and three different metals; Nb, Pd and Ni. The objectives have been to establish orientation relationships and to understand the atomistic structure along the interface. In the case of Ni, the formation of a spinel reaction product has also been explored. For Nb/Al2O3, it has been found that the orientation relationships and the atomic arrangements depend on the temperature at which the interface was formed. Those formed at high temperature by diffusion bonding have (110) planes in the Nb parallel to the interface. There are also misfit dislocations which 'stand-off' the interface. Conversely, interfaces formed at lower temperatures by molecular beam epitaxy have (111) planes in the Nb parallel to the interface. Moreover, the misfit dislocations are located at the interface itself. The differences are attributed to diffusional effects, such as dislocation climb, that can occur at the higher temperatures.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 31, 1992
- Accession Number
- ADA268792
Entities
People
- M. Ruhle
Organizations
- University of California, Santa Barbara