Positron characterization of metastable phases in yttria stabilized zirconia

被引：1

作者：

Damonte, L. C.

Caracoche, M. C.

Lamas, D.

机构：

[1] Consejo Nacl Invest Cient & Tecn, IFLP, RA-1033 Buenos Aires, DF, Argentina

[2] CITEFA CONICET, CINSO Ctr Invest Solidos, RA-1603 Villa Martelli, Argentina

来源：

Physica Status Solidi C - Current Topics in Solid State Physics, Vol 4, No 10 | 2007年 / 4卷 / 10期

关键词：

D O I：

10.1002/pssc.200675841

中图分类号：

O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];

学科分类号：

070203 ; 070304 ; 081704 ; 1406 ;

摘要：

The thermal evolution of positron annihilation parameters in nanosized 10 mol % Y2O3 doped ZrO2 POWders is presented. Three positron lifetimes have been determined up to 900 degrees C annealing temperature. The two major ones have been interpreted, one as a mean between positron annihilation in the bulk and in vacancy-like open volume defects and the other, as due to annihilation in higher sized volume defects. The intensity ratio between the two defect structures depends on temperature and could be reflecting the thermal t'- to cubic metastable transformation known to occur in the studied system. (C) 2007 WILEYNCH Verlag GmbH & Co. KGaA, Weinheim.

引用

页码：3843 / 3846

页数：4

共 17 条

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Brandt W., 1983, POSITRON SOLID STATE

[2] Hyperfine characterization of the metastable t"-form of the tetragonal phase in ZrO2-10 mol % Y2O3 powders synthesized by gel combustion [J].