Oxygen diffusion in nanocrystalline yttria-stabilized zirconia: the effect of grain boundaries

被引：132

作者：

De Souza, Roger A. ^{[1
]}

Pietrowski, Martha J. ^{[1
]}

Anselmi-Tamburini, Umberto ^{[2
]}

Kim, Sangtae ^{[2
]}

Munir, Zuhair A. ^{[2
]}

Martin, Manfred ^{[1
]}

机构：

[1] Rhein Westfal TH Aachen, Inst Phys Chem, D-52056 Aachen, Germany

[2] Univ Calif Davis, Dept Chem Engn & Mat Sci, Davis, CA 95616 USA

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2008年 / 10卷 / 15期

关键词：

D O I：

10.1039/b719363g

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The transport of oxygen in dense samples of yttria- stabilized zirconia ( YSZ), of average grain size d approximate to 50 nm, has been studied by means of O-18/O-16 exchange annealing and secondary ion mass spectrometry ( SIMS). Oxygen diffusion coefficients ( D*) and oxygen surface exchange coefficients ( k*) were measured for temperatures 673 <= T/K <= 973 at an oxygen partial pressure of 900 mbar. No evidence is found for fast diffusion along grain boundaries. Rather, the analysis indicates that grain boundaries hinder oxygen transport.

引用

页码：2067 / 2072

页数：6

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