Oxidation properties of Zr-Nb alloys at 500-600°C under low oxygen potentials

被引：30
|
作者：
Arima, T [1 ]
Miyata, K [1 ]
Inagaki, Y [1 ]
Idemitsu, K [1 ]
机构：
[1] Kyushu Univ, Fac Engn, Inst Environm Syst, Fukuoka 8128581, Japan
来源：
CORROSION SCIENCE | 2005年 / 47卷 / 02期
关键词：
Zr-Nb alloy; oxidation; XRD; EPMA;
D O I：
10.1016/j.corsci.2004.06.011
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Zr-Nb alloys with 1-10 wt.% Nb content were oxidized at 500-600degreesC in the CO-CO2 gas mixtures. The oxidation weight gain increased with Nb content and the kinetics except for Zr-1Nb alloy changed from cubic rate to linear one at 600degreesC for a long period of time, 7d. The cubic rate constant was almost insensitive to oxygen potential of oxidizing atmosphere. As the oxidation resistance deteriorated, the volume ratio of tetragonal to monoclinic zirconia phase and the relevant compressive stress in oxide film decreased with increase of Nb content. Before and after oxidation, Nb re-distribution could not be observed under the present experimental condition. (C) 2004 Elsevier Ltd. All rights reserved.
引用
收藏
页码：435 / 446
页数：12
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