Issue 10 Volume 41 May 16, 2003

This paper summarizes the inspections and inspection results in conjunction with the corrosion experience of
aluminum-clad SNF in basin storage.
NTIS
Aluminum; Corrosion; Fuel Systems
20030036950 Helsinki Univ. of Technology, Espoo (Finland)
Effect of Dissolved Ozone on the Corrosion Behavior of Some Stainless Steels
Pehkonen, A.; Dec. 2001; 122 pp.
Report No.(s): PB2003-102635; TKK-MK-97; Copyright; Avail: National Technical Information Service (NTIS)
The corrosion behavior of some stainless steels and pure metals has been investigated in solutions with dissolved ozone.
The pH of the test solution was 1, 2, 3 and neutral (adjusted by H2SO4). 2.3 and 23 g/l Na2SO4 was added to increase the
conductivity in anodic and cathodic polarisation measurements. The temperature of the test solution was 20, 50 and 75 degrees
C. Test materials were four different stainless steels: ferritic stainless steel Polarit 815 and austenitic stainless steels Polarit
720, Polarit 752 and Ralloy 654MO. Also Armco iron, pure Mo, Ni and Cr were tested. The general electrochemical behavior
of stainless steels and pure metals was studied with potentiodynamic cyclic polarization experiments at scanning rates 1, 10
and 100 mV/min and pitting behavior at 10 mV/min. Potentiostatic experiments were also used. Immersion tests were also
carried out mainly to produce test samples for surface examination but also to measure the weight losses. The structure and
thickness of the oxidized surfaces were examined and analysed using optical microscope, SEM, GDOS, ESCA and X-ray
diffractometer methods. Dissolved ozone increases the redox-potential of test solutions to about +1200 mV vs. SCE and the
corrosion potential of stainless steel to the transpassive region, below the oxygen evolution potential. The current densities of
stainless steels in this region increase as the amount of alloying elements increases. On the other hand, dissolved ozone
increases current densities only slightly compared to oxygen bubbled solution. Higher ozone concentration obtained under
high pressure has no effect on the corrosion behavior of stainless steels.
NTIS
Corrosion; Ozone; Stainless Steels
20030037003 National Renewable Energy Lab., Golden, CO
Cu(In,Ga)Se(2) Thin-Film Evolution During Growth: A Photoluminescense Study
Keyes, B. M.; Dippo, P.; AbuShama, J.; Noufi, R.; May 2002; In English
Report No.(s): DE2002-15000986; No Copyright; Avail: National Technical Information Service (NTIS)
This conference paper describes the in-depth understanding of the defect formation and resulting changes in material
quality occurring during the Cu(In, Ga)Se2 growth process is vital to the successful and widespread use of this photovoltaic
material. In an attempt to develop such an understanding, we investigated the growth of Cu(In,Ga)Se2 thin-films from
(In,Ga)2Se3 precursors. This was achieved by using energy- and time-resolved photoluminescence spectroscopies to
characterize a series of thin-films, each removed at a different point along the reaction pathway of the ‘three-stage’ growth
process. The resulting thin-films are representative of the absorber layer as it proceeds from a Cu-rich to In(Ga)-rich state. The
experimental results support a growth model incorporating defect changes in the dominant defect states and improvement in
the recombination lifetime during this final stage of the growth process as the material transitions to a Cu-poor phase.
NTIS
Growth; Photoluminescence; Defects; Thin Films; Copper Alloys
20030037011 Lawrence Livermore National Lab., Livermore, CA
Microstructure Evolution in Irradiated Materials
Caturla, M. J.; Nov. 30, 1999; 12 pp.; In English
Report No.(s): DE2002-15002353; UCRL-ID-136990; No Copyright; Avail: Department of Energy Information Bridge
We will study the interaction of defects produced during irradiation or deformation of a metal with the microstructure of
that particular material, such as dislocations and grain boundaries. In particular we will study the interaction of dislocation
with interstitial loops and stacking fault tetrahedral, and the production of displacement cascades close to dislocations and
grain boundaries. The data obtained from these simulations will be used as input to diffusion models and dislocation dynamics
models.
NTIS
Microstructure; Irradiation; Radiation Effects
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