Irradiation growth of zirconium single crystals
Irradiation growth of zirconium single crystals has been studied during neutron irradiation at 353 K and 553 K at fluences up to 2× 10 25 n/m 2. The results may be summarized as follows: (a) there was an expansion parallel to the a-axis and a c-axis contraction; (b) the growth strains were small (~1...
Saved in:
Published in | Journal of nuclear materials Vol. 101; no. 1; pp. 28 - 37 |
---|---|
Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
Elsevier B.V
01.10.1981
|
Online Access | Get full text |
Cover
Loading…
Summary: | Irradiation growth of zirconium single crystals has been studied during neutron irradiation at 353 K and 553 K at fluences up to 2× 10
25 n/m
2. The results may be summarized as follows: (a) there was an expansion parallel to the
a-axis and a
c-axis contraction; (b) the growth strains were small (~10
−4), (c) growth saturated at fluences less than ~5× 10
24 n/m
2, (d) the growth behaviour was only weakly dependent on temperature for the range studied, (e) there was a calculated volume increase of the same order as the growth strain, and (f) single crystals prepared from stock of iodide and zone-refined purity showed similar growth behaviour at 553 K. The
a-axis expansion is attributed to the annihilation of an excess of interstitials at <
a>-type dislocations and interstitial loops. The
c-axis contraction may be caused by: (1) elastic relaxation around vacancies or small vacancy clusters, (2) non-linear elastic effects at the dislocation cores of small 〈
a〉-type loops, or (3) sub-microscopic vacancy loops with 〈
c〉-component Burgers vectors. Comparison with data from polycrystalline zirconium confirms that grain boundaries can play an important role in the irradiation growth of zirconium. |
---|---|
Bibliography: | ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 |
ISSN: | 0022-3115 1873-4820 |
DOI: | 10.1016/0022-3115(81)90441-4 |