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Interaction of NiO with yttria-stabilized zirconia

✍ Scribed by A. Kuzjukevics; S. Linderoth

Publisher
Elsevier Science
Year
1997
Tongue
English
Weight
992 KB
Volume
93
Category
Article
ISSN
0167-2738

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✦ Synopsis

As-prepared and heat treated plasma-produced 8 and 10 mol% yttria-stabilized zirconia (YSZ) powders doped with 0, 5, 10 and 75 mol% NiO have been investigated by XRD. The as-prepared powders are mixtures of metastable tetragonal and cubic phases but they transform to a single YSZ phase upon heat treatment above 1200Β°C. The solubility of NiO in yttria-stabilized zirconia is less than 2 mol% at 1600Β°C and varies little within the investigated yttria concentration range. The solubility increases with increasing temperature and the total NiO concentration. The activation energy of the solubility is about 0.25 eV.

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