FORMATION OF DIFFUSIONLESSLY TRANSFORMED TETRAGONAL PHASES BY RAPID QUENCHING OF MELTS IN ZRO2 RARE EARTHSO1.5 SYSTEMS

被引：94

作者：

YOSHIMURA, M

YASHIMA, M

NOMA, T

SOMIYA, S

机构：

[1] Research Laboratory of Engineering Materials, Tokyo Institute of Technology, Yokohama, 227, Nagatsuta, Midori

来源：

JOURNAL OF MATERIALS SCIENCE | 1990年 / 25卷 / 04期

关键词：

D O I：

10.1007/BF01045757

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Rare-earth (Nd, Sm, Er, Yb, Sc)-doped zirconia was melted using an arc-imaging furnace, and rapidly quenched with a hammer and anvil apparatus (cooling rate >10 5 K sec -1 ). These ZrO 2 -RO 1.5 samples were investigated by X-ray diffraction and transmission electron microscopy. The existing region of metastable tetragonal zirconia is from 2 to 14 mol% of RO 1.5 regardless of the species of dopants, RO 1.5 . In the lattice parameters of the tetragonal phases, the unit cell volume corresponds to the ionic radii of dopants, whereas the tetragonality (c/a) is independent of the species of dopants, but dependent on the content of dopants. © 1990 Chapman and Hall Ltd.

引用

页码：2011 / 2016

页数：6

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