On the anisotropic migration of point defects in h.c.p. zirconium

A. G. Mikhin; Yu N. Osetsky; V. G. Kapinos

doi:10.1080/01418619408242534

On the anisotropic migration of point defects in h.c.p. zirconium

A. G. Mikhin, Yu N. Osetsky, V. G. Kapinos

Research output: Contribution to journal › Article › peer-review

35 Scopus citations

Abstract

Point-defect calculations in h.c.p. zirconium have been carried out with a pair potential constructed in terms of the generalized pseudopotential theory. Two models of the h.c.p. lattice with either the ideal or the experimental c/a ratio were considered. It has been found with both models that the monovacancy has the same migration energy in and out of the basal plane, whereas the divacancy migration is anisotropic and favours out-of-plane mobility. A significant anisotropy for interstitial migration is observed, with greater in-plane mobility at the experimental c/a ratio. The di-interstitial migrates in the basal plane by the crowdion mechanism. The results of the calculations permit interpretation of some annealing stages of irradiated zirconium and allow conclusions to be drawn on the possibility of the diffusional anisotropy difference in h.c.p. zirconium.

Original language	English
Pages (from-to)	25-33
Number of pages	9
Journal	Philosophical Magazine A: Physics of Condensed Matter, Structure, Defects and Mechanical Properties
Volume	70
Issue number	1
DOIs	https://doi.org/10.1080/01418619408242534
State	Published - Jul 1994
Externally published	Yes

Access to Document

10.1080/01418619408242534

Cite this

@article{bcaee89a14ed4fb1b5e8275186ad4433,

title = "On the anisotropic migration of point defects in h.c.p. zirconium",

abstract = "Point-defect calculations in h.c.p. zirconium have been carried out with a pair potential constructed in terms of the generalized pseudopotential theory. Two models of the h.c.p. lattice with either the ideal or the experimental c/a ratio were considered. It has been found with both models that the monovacancy has the same migration energy in and out of the basal plane, whereas the divacancy migration is anisotropic and favours out-of-plane mobility. A significant anisotropy for interstitial migration is observed, with greater in-plane mobility at the experimental c/a ratio. The di-interstitial migrates in the basal plane by the crowdion mechanism. The results of the calculations permit interpretation of some annealing stages of irradiated zirconium and allow conclusions to be drawn on the possibility of the diffusional anisotropy difference in h.c.p. zirconium.",

author = "Mikhin, {A. G.} and Osetsky, {Yu N.} and Kapinos, {V. G.}",

year = "1994",

month = jul,

doi = "10.1080/01418619408242534",

language = "English",

volume = "70",

pages = "25--33",

journal = "Philosophical Magazine A: Physics of Condensed Matter, Structure, Defects and Mechanical Properties",

issn = "0141-8610",

number = "1",

}

TY - JOUR

T1 - On the anisotropic migration of point defects in h.c.p. zirconium

AU - Mikhin, A. G.

AU - Osetsky, Yu N.

AU - Kapinos, V. G.

PY - 1994/7

Y1 - 1994/7

N2 - Point-defect calculations in h.c.p. zirconium have been carried out with a pair potential constructed in terms of the generalized pseudopotential theory. Two models of the h.c.p. lattice with either the ideal or the experimental c/a ratio were considered. It has been found with both models that the monovacancy has the same migration energy in and out of the basal plane, whereas the divacancy migration is anisotropic and favours out-of-plane mobility. A significant anisotropy for interstitial migration is observed, with greater in-plane mobility at the experimental c/a ratio. The di-interstitial migrates in the basal plane by the crowdion mechanism. The results of the calculations permit interpretation of some annealing stages of irradiated zirconium and allow conclusions to be drawn on the possibility of the diffusional anisotropy difference in h.c.p. zirconium.

AB - Point-defect calculations in h.c.p. zirconium have been carried out with a pair potential constructed in terms of the generalized pseudopotential theory. Two models of the h.c.p. lattice with either the ideal or the experimental c/a ratio were considered. It has been found with both models that the monovacancy has the same migration energy in and out of the basal plane, whereas the divacancy migration is anisotropic and favours out-of-plane mobility. A significant anisotropy for interstitial migration is observed, with greater in-plane mobility at the experimental c/a ratio. The di-interstitial migrates in the basal plane by the crowdion mechanism. The results of the calculations permit interpretation of some annealing stages of irradiated zirconium and allow conclusions to be drawn on the possibility of the diffusional anisotropy difference in h.c.p. zirconium.

UR - http://www.scopus.com/inward/record.url?scp=21344498890&partnerID=8YFLogxK

U2 - 10.1080/01418619408242534

DO - 10.1080/01418619408242534

M3 - Article

AN - SCOPUS:21344498890

SN - 0141-8610

VL - 70

SP - 25

EP - 33

JO - Philosophical Magazine A: Physics of Condensed Matter, Structure, Defects and Mechanical Properties

JF - Philosophical Magazine A: Physics of Condensed Matter, Structure, Defects and Mechanical Properties

IS - 1

ER -

On the anisotropic migration of point defects in h.c.p. zirconium

Abstract

Access to Document

Other files and links

Fingerprint

Cite this