Thermal expansion behavior of δ-zirconium hydrides: Comparison of δ hydride powder and platelets

The thermal expansion coefficient of δ hydrides and the evolution of the d-spacing of δ hydride platelets in Zircaloy-4 during heat treatments were investigated by conducting synchrotron x-ray diffraction experiments. Identical experiments enabled a direct comparison of the d-spacing of δ zirconium...

Full description

Saved in:
Bibliographic Details
Published in:Journal of nuclear materials 2018-10, Vol.509 (C), p.566-576
Main Authors: Cinbiz, M. Nedim, Hu, Xunxiang, Terrani, Kurt
Format: Article
Language:English
Subjects:
Dissolution and precipitation
Lattice parameter
MATERIALS SCIENCE
Mechanical strain
Synchrotron radiation
Thermal expansion coefficient
Zirconium hydrides
δ hydrides
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The thermal expansion coefficient of δ hydrides and the evolution of the d-spacing of δ hydride platelets in Zircaloy-4 during heat treatments were investigated by conducting synchrotron x-ray diffraction experiments. Identical experiments enabled a direct comparison of the d-spacing of δ zirconium hydride platelets with the d-spacing of the powder δ hydrides. By analyzing the experimental data of this study and the data available in the literature, the thermal expansion coefficient of pure δ hydrides was determined as 14.1 10−6 °C−1. A direct comparison of the d-spacings of δ hydride platelets in CWSR Zry-4 sheet and the powder δ hydride samples showed an evolution of temperature-dependent strains within the δ hydride precipitates in which the strain components normal to the platelet edges exceed that normal to the platelet face during cooling/precipitation but not during heating/dissolution above approx. 200 °C.
ISSN:0022-3115
1873-4820
DOI:10.1016/j.jnucmat.2018.07.026