The morphology and anisotropic growth kinetics of cerium hydride reaction sites

被引：17

作者：

Knowles, John P. ^{[1
]}

Rule, Georgia ^{[1
,2
]}

Brierley, Martin ^{[1
]}

机构：

[1] AWE Plc, Reading RG7 4PR, Berks, England

[2] Univ Nottingham, Sch Chem, Nottingham NG7 2RD, England

来源：

CORROSION SCIENCE | 2013年 / 77卷

关键词：

Rare earth elements; Kinetic parameters; Pitting corrosion; MECHANICAL-PROPERTIES; METAL-HYDRIDES; HYDROGEN;

D O I：

10.1016/j.corsci.2013.07.020

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The lateral and penetrative growth velocities of cerium hydride reaction sites under 100 mbar of hydrogen at 30 degrees C have been determined from a combination of in situ imaging and post reaction optical and electron microscopy. Scanning electron microscopy resolved small hydride sites (<100 mu m) in the initial stages of growth and ion-etching revealed these sites to be comprised of a poly-crystalline core surrounded by a corona of deformed material. Extended-focus optical microscopy revealed larger reaction sites (>100 mu m) had grown with oblate hemispherical morphology as a consequence of anisotropic growth kinetics. Crown Copyright (C) 2013 Published by Elsevier Ltd. All rights reserved.

引用

页码：31 / 36

页数：6

共 24 条

[1] The effect of surface state on the kinetics of cerium-hydride formation [J].