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Profiling of Hydrogen in Zirconium Surfaces by Laser Ablation with Resonance Ionization

Published online by Cambridge University Press:  01 January 1992

G.A. Bickel ,
G.A. Mcrae  and
L.W. Green
G.A. Bickel
Affiliation:
AECL Research, Chalk River, Ontario, Canada KOJ IJO
G.A. Mcrae
Affiliation:
AECL Research, Chalk River, Ontario, Canada KOJ IJO
L.W. Green
Affiliation:
AECL Research, Chalk River, Ontario, Canada KOJ IJO
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Abstract

Elemental distributions in the bulk and metal oxide surface layers of zirconium alloys play key roles in the fracture toughness of the alloys. In particular, localized hydrogen build-up leads to hydride formation and delayed hydride cracking. Parts per million levels of H in Zr have been detected using the 1.06 μm or 355 nm output of a Nd:YAG laser for ablation followed by 2+1 resonance ionization detection of H and D. Analysis of the ablation plume has shown that it consists predominately of atomic species in thermal equilibrium between 2000 and 3600°C. Ablation of thin foils has shown that the ablation rate is on the order of mono-layers per shot and increases exponentially with increasing fluence. Laser ablation depth profiling results of H distributions in an anodically grown oxide film compare qualitatively with nuclear-reaction-analysis profiling of the same sample.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 285: Symposium I – Laser Ablation in Materials Processing–Fundamentals and Applications , 1992 , 221
Copyright
Copyright © Materials Research Society 1993

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References

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