STUDY OF MICROSTRUCTURE OF OXIDIZED Zr-2.5%Nb SUBJECTED TO THERMAL TRANSIENT TREATMENTS

被引：0
|
作者：
Mihalache, M. [1 ]
Ionescu, V. [1 ]
Meleg, T. [1 ]
Pavelescu, M. [2 ]
机构：
[1] Inst Nucl Res Pitesti, Pitesti, Romania
[2] Acad Scientists, Bucharest 050094, Romania
来源：
ROMANIAN JOURNAL OF PHYSICS | 2011年 / 56卷 / 7-8期
关键词：
oxide; electronic microscopy; thermal treatment; pressure tube; CANDU; NB;
D O I：
暂无
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Analysis of postulated Loss-Of-Cooling Accidents (LOCA) in CANDU 6 reactors has to consider oxidized state and Zr-2.5%wtNb alloy microstructure. During thermal transients, in oxidized alloy, microstructure changes in oxide layer and material base have been observed by optical microscopy, Scanning Electron Microscopy (SEM) and Energy Dispersive X-ray spectrometry (EDS). Samples isothermally oxidized at 700 degrees C, with variable thickness oxide layers, were subjected to the various temperature transients up to 1000 degrees C, at different controlled heating/cooling rates. The effects of oxide and alloy microstructure changes are correlated with the characteristics of thermal transients.
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页码：952 / 962
页数：11
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