Berlin 2012 – wissenschaftliches Programm
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DS: Fachverband Dünne Schichten
DS 14: Ion irradiation effects
DS 14.2: Vortrag
Dienstag, 27. März 2012, 12:00–12:15, H 0111
Ion implantation-induced defects in Oxide Dispersion Strengthened (ODS) steel probed by positron annihilation spectroscopy — •Wolfgang Anwand1, Maik Butterling1, Gerhard Brauer1, Andreas Wagner1, Astrid Richter2, Reinhard Koegler3, and C.-L. Chen4 — 1HZDR, Institut für Strahlenphysik — 2Technische Hochschule Wildau — 3HZDR, Institut für Ionenstrahlphysik und Materialforschung — 4I-Shou University, Kaohsiung, Taiwan
ODS steel is a promising candidate for an application in fission and fusion power plants of a new generation because of its advantageous properties as stability and temperature resistance. A microscopic understanding of the physical reasons of the mechanical and thermal properties as well as the behaviour of the material under irradiation is an important pre-condition for such applications. The investigated ODS FeCrAl alloy *PM2000* has been produced in a powder metallurgical way. Neutron-induced damage at ODS steel was simulated by He+ and Fe2+ co-implantation with energies of 2.5 MeV and 400 keV, respectively, and different fluences. The implantation has been carried out with a dual ion beam which enables a simultaneous implantation of both ion types. Thereby the Fe2+ implantation was used for the creation of radiation defects, and He+ was implanted in order to reproduce He bubbles as they are expected to appear by neutron irradiation. The implantation-induced damage was investigated by depth dependent Doppler broadening measurements using a variable energy slow positron beam.