INFLUENCE OF COPPER-DOPING AND IRON-DOPING ON CUBIC YTTRIA-STABILIZED ZIRCONIA

被引:21
作者
HARTMANOVA, M
POULSEN, FW
HANIC, F
PUTYERA, K
TUNEGA, D
URUSOVSKAYA, AA
ORESHNIKOVA, TV
机构
[1] NORWEGIAN INST TECHNOL,IND ELECTROCHEM LABS,N-7034 TRONDHEIM,NORWAY
[2] SLOVAK ACAD SCI,INST INORGAN CHEM,CS-84236 BRATISLAVA,SLOVAKIA
[3] RUSSIAN ACAD SCI,INST CRYSTALLOG,MOSCOW 117333,RUSSIA
[4] RISO NATL LAB,DK-4000 ROSKILDE,DENMARK
关键词
D O I
10.1007/BF01154694
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Cubic yttria-stabilized zirconias (YSZs) (15 mol% Y2O3) doped with 2 wt% CuO and 0.3 wt% Fe2O3, respectively, have been compared with undoped YSZ. The lattice constants were found to increase in the sequence: a(YSZ) < a(YSZ/Fe) < a(YSZ/Cu). Vickers microhardness of polycrystalline YSZ/Fe exceeds that of polycrystalline YSZ/Cu, whereas the hardness of the single crystalline materials YSZ/Fe and YSZ/Cu are nearly identical and consistently lower than the polycrystalline values. Raman and infrared spectra reveal a breakdown of the selection rules, i.e. these techniques probe the local, non-cubic arrangement of oxygen vacancies. The findings are discussed in terms of a substitutional versus an interstitial-doping model.
引用
收藏
页码:2152 / 2158
页数:7
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