Dynamic shock compaction of a ZrO2-RuO2electronic nanocomposite: toward functionally graded materials
✍ Scribed by van Zyl, Werner E. ;Carton, Erik P. ;Raming, Tomas P. ;ten Elshof, Johan E. ;Verweij, Henk
- Publisher
- John Wiley and Sons
- Year
- 2005
- Tongue
- English
- Weight
- 199 KB
- Volume
- 202
- Category
- Article
- ISSN
- 0031-8965
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✦ Synopsis
Abstract
An electronic ZrO~2~–RuO~2~ nanocomposite was fabricated by dynamic compaction (DC) at 1.5 GPa resulting in a maximum relative density of 88% in the material. The DC process formed pristine elongated conical‐shaped compacts 3 cm in length. The compacts retained their original nanometer‐sized grains (∼20 nm) of the original powder from which it was prepared, marking the densest RuO~2~‐based __nano__composite to date. A change by a remarkable factor of 10^7^ in electrical conductance was observed for two separate specimens, one processed by DC (σ = 1.1 × 10^–4^ S cm^–1^) and the other by conventional pressureless sintering (σ = 2.1 × 10^3^ S cm^–1^) both obtained from the same starting nanopowder and thus with a similar concentration of conductor phase at 10 mol% RuO~2~. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)