In-situ investigation of hydrogen diffusion in Zircaloy-4 by means of neutron radiography

被引：19
|
作者：
Grosse, M. [1 ]
van den Berg, M. [1 ,2 ]
Goulet, C. [1 ,3 ]
Kaestner, A. [4 ]
机构：
[1] Karlsruhe Inst Technol, Inst Appl Mat, POB 3640, D-76021 Karlsruhe, Germany
[2] Fontys Hogsch, NL-5612 MA Eindhoven, Netherlands
[3] INSA Univ, F-31077 Toulouse 4, France
[4] PSI, Dept Spallat Source, CH-5232 Villigen, Switzerland
来源：
5TH EUROPEAN CONFERENCE ON NEUTRON SCATTERING | 2012年 / 340卷
关键词：
ZIRCONIUM ALLOYS;
D O I：
10.1088/1742-6596/340/1/012106
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The hydrogen diffusion from the gas phase into Zircaloy-4 solid cylinders was investigated at various temperatures between 823 and 1473 K. Diffusion coefficients were fitted using axial hydrogen distributions for all temperatures investigated. The activation energy of the hydrogen diffusion was calculated for temperatures at which the bcc beta phase is stable. The determined value of 48.3 kJ mol(-1) K-1 is significantly higher than values published by other authors. At lower temperatures the hydrogen uptake is connected with a phase transformation from the hcp alpha- to the bcc beta-phase. The spatial phase distribution and the hydrogen concentrations in the two phases were analysed.
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页数：8
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