Multiscale aspects of the influence of yttrium on microstructure, sintering and creep of alumina

被引：55

作者：

Lartigue-Korinek, S

Carry, C

Priester, L

机构：

[1] CNRS, Ctr Etud Chim Met, UPR 2801, F-94407 Vitry Sur Seine, France

[2] ENSEEG, UJF, INPG, LTPCM,CNRS,UMR 5614, F-38042 St Martin Dheres, France

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2002年 / 22卷 / 9-10期

关键词：

Al2O3; creep; electron microscopy; grain boundaries; sintering;

D O I：

10.1016/S0955-2219(01)00471-X

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Yttrium doping induces modifications of the microstructural features and properties of polycrystalline alumina. This paper presents a review of most results on this topic. Experimental and calculated results on yttrium grain boundary (GB) segregation are first described. They include yttrium distribution as a function of grain size and atomic structural configurations around yttrium in GBs. The role of yttrium on the overall microstructure, GB structure, GB defects and grain growth is discussed. The discussion provides a basis for the understanding of sintering phenomena and creep behaviour. Attention is particularly focussed on the effect of the transition between GB yttrium segregation and the occurrence of GB precipitates on the properties of yttria doped alumina. (C) 2002 Elsevier Science Ltd. All rights reserved.

引用

页码：1525 / 1541

页数：17

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