Peculiarity of Zr in the Neutron Absorption Cross-section and Corrosion Resistance in Water
International Journal of Materials Science and Applications
Volume 6, Issue 5, September 2017, Pages: 235-240
Received: Aug. 2, 2017;
Accepted: Aug. 15, 2017;
Published: Aug. 28, 2017
Views 2467 Downloads 115
Yoshiharu Mae, Maetech, Mimuro, Midori Ward, Saitama City, Japan
Follow on us
The elements Be, Bi, Mg, Pb, Zr, Al, Ca, Na, Sn, Rb and Ce are the metallic elements of small thermal neutron absorption cross section. Except Be and Zr, they are all soft metals. But the reasons for these small thermal neutron absorption cross-sections are not known. To clarify its mechanism, the thermal neutron absorption cross-sections of elements were plotted on the TC-YM diagram. They lie on a line connecting the elements of low Young’s modulus on the TC-YM diagram. The author at first considered that the neutron absorption characteristics of elements relate to the neutron multiple number which means the number of neutrons per proton in the nucleus. The absorption cross-section of elements roughly increases with increasing neutron multiple number. Among the elements of small neutron absorption cross section, only Zr and Be are the elements of high melting temperature. Zr should not show the small neutron absorption cross section inherently. But in fact, Zr is exceptional both on the TC-YM diagram and in the neutron multiple number. Zr has a small absorption cross-section against the general trends in both the TC-YM diagram and neutron multiple number. On the other hand, the corrosion resistance of Zircaloy is given by the anodic protection provided by the precipitates of metallic compounds containing Fe and Cr. It is fortunate that Fe and Cr belong to the element group of the metals nobler than Zr and that of no solubility in Zr on the TC-YM diagram.
Thermal Neutron Absorption Cross Section, Neutron, Proton, Young’s Modulus, Thermal Conductivity, Anodic Protection, Zr
To cite this article
Peculiarity of Zr in the Neutron Absorption Cross-section and Corrosion Resistance in Water, International Journal of Materials Science and Applications.
Vol. 6, No. 5,
2017, pp. 235-240.
Copyright © 2017 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/
) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
T. Isobe, T, Murai, and Y. Mae, “Anodic protection provided by precipitates in aqueous corrosion of Zircaloy,” Zirconium in the nuclear industry: 11th Symposium, ASTM, pp. 203-216, 1999.
Y. Mae, “What the Darken-Gurry plot means about the solubility of elements in metals,” Metall. Mater. Trans. A, vol. 47, pp. 6498-6506, Dec. 2016.
Y. Mae, “Anthropic principle observed in the material properties of Fe,” J. Mater. Sci. Res., vol. 6, No. 3, pp. 11-19, 2017.
Y. Mae, “Schematic Interpretation of anomalies in the Physical Properties of Eu and Yb among the lanthanides,” Int. J. Mater. Sci. App., vol. 6, pp. 165-170, 2017.
Y. Mae, “Neutron multiple number as a factor ruling both the abundance and some material properties of elements,” J. Mater. Sci. Res., Vol. 6, No. 3, pp. 37-42, 2017.
Y. Mae, “Correlation of the effects of alloying elements on the hardenability of steels to the diffusion coefficients of elements in Fe,” Int. J. Mater. Sci. App., Vol. 6, No. 4, pp. 200-206, 2017.
Japan Atomic Energy Research Institute, Data sheet JAERI 6010, 1962.
H. Sakurai, New knowledge about 111 elements, Koudan-sha, 1997, pp. 201.
S. Nagakura, etc., Dictionary of physics and chemistry, Iwanami, 1998, p. 667.
R. W. Bauer, J. D. Anderson, S. M. Grimes and V. A. Maden, “Application of Simple Ramsauer Model to Neutron Total Cross Section,” UCRL_JC_127199, 1997.