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Title: 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 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. Finally, 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.
Authors:
ORCiD logo [1] ; ORCiD logo [1] ; ORCiD logo [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Grant/Contract Number:
AC05-00OR22725
Type:
Accepted Manuscript
Journal Name:
Journal of Nuclear Materials
Additional Journal Information:
Journal Volume: 509; Journal Issue: C; Journal ID: ISSN 0022-3115
Publisher:
Elsevier
Research Org:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org:
USDOE Office of Nuclear Energy (NE)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Zirconium hydrides; Thermal expansion coefficient; Lattice parameter; δ hydrides; Synchrotron radiation; Mechanical strain; Dissolution and precipitation
OSTI Identifier:
1462875

Cinbiz, Mahmut N., Hu, Xunxiang, and Terrani, Kurt A.. Thermal expansion behavior of δ-zirconium hydrides: Comparison of δ hydride powder and platelets. United States: N. p., Web. doi:10.1016/j.jnucmat.2018.07.026.
Cinbiz, Mahmut N., Hu, Xunxiang, & Terrani, Kurt A.. Thermal expansion behavior of δ-zirconium hydrides: Comparison of δ hydride powder and platelets. United States. doi:10.1016/j.jnucmat.2018.07.026.
Cinbiz, Mahmut N., Hu, Xunxiang, and Terrani, Kurt A.. 2018. "Thermal expansion behavior of δ-zirconium hydrides: Comparison of δ hydride powder and platelets". United States. doi:10.1016/j.jnucmat.2018.07.026.
@article{osti_1462875,
title = {Thermal expansion behavior of δ-zirconium hydrides: Comparison of δ hydride powder and platelets},
author = {Cinbiz, Mahmut N. and Hu, Xunxiang and Terrani, Kurt A.},
abstractNote = {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. Finally, 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.},
doi = {10.1016/j.jnucmat.2018.07.026},
journal = {Journal of Nuclear Materials},
number = C,
volume = 509,
place = {United States},
year = {2018},
month = {7}
}