Hydrogen terminal solid solubility determinations in Zr-2.5Nb pressure tube microstructure in an extended concentration range

被引：18
|
作者：
Giroldi, J. P. [1 ]
Vizcaino, P. [1 ,2 ]
Flores, A. V. [1 ]
Banchik, A. D. [1 ]
机构：
[1] Ctr Atom Ezeiza, LMFAE, Buenos Aires, DF, Argentina
[2] Consejo Nacl Invest Cient & Tecn, RA-1033 Buenos Aires, DF, Argentina
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2009年 / 474卷 / 1-2期
关键词：
Nuclear reactor materials; Thermodynamic properties; Thermal analysis; TEM; ZIRCONIUM ALLOYS;
D O I：
10.1016/j.jallcom.2008.06.104
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
In the present work the temperature of terminal solid solubility of hydrogen in the zirconium alloy Zr-2.5Nb was measured for material taken from a CANDU type pressure tube. The measurements were made in a wide concentration range (50-463 wppm) using two techniques, differential scanning calorimetry and differential dilatometry, with the additional purpose of checking the coincidence of the TSS points in both techniques. The work was complemented by microstructural studies pursuing the (beta-Zr) -> (alpha-Zr + beta-Zr-enr + beta-Nb) transformation. This transformation is accelerated if the material remains at temperatures higher than 400 degrees C, which corresponds to a hydrogen solubility of about 180 wppm. Thus, microstructural studies were made by transmission electron microscopy and energy dispersive analysis, which allowed to relate changes in the solubility with these microstructural transformations. (C) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码：140 / 146
页数：7
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