Comparative study of U diffusion in Zry-4 and pure α-Zr

Materia

Pérez, Rodolfo Ariel¹  Iribarren, Manuel²  Gordillo, Jorge Apóstol³ 

[1] Comisión Nacional de Energía Atómica, San Martín, Argentina;Consejo Nacional de Investigaciones Científicas y Técnicas, Buenos Aires, Argentina;UNSAM, San Martín, Argentina

关键词: Diffusion;    α;    -spectrometry;    Uranium;    Zirconium;    Zircaloy.;   

DOI  :  10.1590/s1517-707620180002.0329

学科分类：工程和技术（综合）

来源: Universidade Federal do Rio de Janeiro * Coordenacao dos Programas de Pos-Graduacao de Engenharia

【 摘 要 】

Throughout the α-spectrometry U diffusion in pure Zry-4 was studied and compared with pure α-Zr in the temperature range 843-1093 K in order to analyze the diffusion process in both matrices. D values are systematically higher in Zry-4 and its temperature dependence obeys the Arrhenius law being: D0 = (3,2 ± 1,1) m2/s and Q = (316 ± 9) kJ mol-1, whereas in α-Zr U diffusion present an apart to this law, consistent in a downward curvature in the ln(D) vs 1/T plot. Below 873 K U solubility in Zry4 is lower than in pure Zr.

【 授权许可】

CC BY