Effect of CuO additives on the reversibility of zirconia crystalline phase transitions

We have studied the influence of the differents atmospheres on the sintering of CuO-doped-zirconia ceramics. After an annealing treatment in a reducing atmosphere, we have found nanoparticles of metallic copper in triple points and in the grains of the sintered zirconia. Furthermore, the influence o...

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Veröffentlicht in:	Journal of materials science 1999-05, Vol.34 (9), p.2207-2215
Hauptverfasser:	LEMAIRE, L, SCHOLZ, S. M, BOWEN, P, DUTTA, J, HOFMEISTER, H, HOFMANN, H
Format:	Artikel
Sprache:	eng
Schlagworte:	Additives Applied sciences Building materials. Ceramics. Glasses Ceramic industries Chemical industry and chemicals Copper oxides Crystal structure Crystallinity Crystals Differential thermal analysis Ductile-brittle transition Exact sciences and technology Fracture mechanics Materials science Miscellaneous Nanoparticles Phase transitions Raman spectroscopy Technical ceramics Transmission electron microscopy Zirconium dioxide
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Zusammenfassung:	We have studied the influence of the differents atmospheres on the sintering of CuO-doped-zirconia ceramics. After an annealing treatment in a reducing atmosphere, we have found nanoparticles of metallic copper in triple points and in the grains of the sintered zirconia. Furthermore, the influence of the intergranular Y2Cu2O5 phase on the tetragonal to monoclinic phase transition and the crystalline structure of zirconia is discussed with respect to results obtained from X-ray diffraction, differential thermal analysis, Raman spectroscopy and High Resolution Transmission Electron Microscopy.
ISSN:	0022-2461 1573-4803 1573-4803
DOI:	10.1023/A:1004500918830