Sink Strength Evolution of Heavy Ion Irradiated Nickel

Author:

Fielitz P.,Macht M.-P.,Naundorf V.,Wollenberger H.

Abstract

AbstractAtom transport under irradiation is determined by the concentration of freely migrating defects, which depends on the dynamical equilibrium between production and annihilation rates. In order to determine effective values of both of these quantities for the case of ion irradiation, spatially resolved self-diffusion measurements were performed on single crystals of nickel which contained several thin tracer layers at different depths.For fixed depth the radiation-enhanced diffusion coefficient (DK) was determined as function of displacement rate (K0) and fluence (Φ). The DK essentially representing the ratio of the rates of production and annihilation was found to be proportional to K0 for 800 K irradiation temperature and to K00.4for Ni and K00.4for Kr irradiation at 950 K. It is independent of Φ for 800 K and decreases with increasing Φ for 950 K.

Publisher

Springer Science and Business Media LLC

Subject

General Engineering

Reference9 articles.

1. 8. Fielitz P. , Strahlungsinduzierte Diffusion in Nickel unter Schwerionenbestrahlung, Doktorarbeit (Ph.-D.-Thesis) TU Berlin, D83, 1997.

2. Atom transport in nickel by displacement cascades for spatially dependent displacement rate and sink strength

3. 5. Neutron Radiation Damage Simulation by Charged Particle Simulation, Report No. ASTM E 521-77.

4. Point defect sinks in self‐ion‐irradiated nickel: A self‐diffusion investigation

5. Limits of depth resolution for sputter sectioning: A secondary ion mass spectrometry investigation of 63Ni in nickel

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