Abstract
The three-dimensional atomic structure of low-energy NiO-ZrO2(cubic) interfaces is determined through a combination of electron imaging and spectroscopy techniques. High resolution electron microscopy, and Z-contrast STEM imaging with simultaneous electron energy loss spectroscopy are employed as complementary techniques for elucidating the structural and chemical aspects of the interface and associated interfacial relaxation mechaubic) interface. The planar interfaces show an atomically abrupt transition between the two phases which share a common oxygen plane at the boundary. Structural relaxations accommodating the lattice mismatch indicate that the boundary has relaxed to a low-energy configuration. The resulting interface structure is found to facilitate strong bonding across the boundary as is reflected in the fracture behavior of the composite system.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1801-1816 |
| Number of pages | 16 |
| Journal | Acta Materialia |
| Volume | 46 |
| Issue number | 5 |
| DOIs | |
| State | Published - Mar 2 1998 |
Funding
The authors would like to thank Alex Revcolevschi of the Université de Paris-Sud for supplying the DSE specimens. We would also like to extend sincere thanks to Manfred Rühle and the Max Planck Institute, Stuttgart for facilitating the ARM sessions and to Thomas Gemming for his assistance in operating the ARM. This material is based upon work supported under a National Science Foundation Graduate Research Fellowship (for E.C.D.) and NFS-DMR grant no. 95284888. This research was also supported by U.S. Department of Energy contract No. DE-AC05-96OR22464, as part of the ORNL HTML Fellowship Program with Lockheed Martin Energy Research Corp. (for E.C.D.) and ORNL Postdoctoral Program administered by Oak Ridge Institute for Science Education (for P.N.).
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Ceramics and Composites
- Polymers and Plastics
- Metals and Alloys