In situ probing of fast defect annealing in Cu and Ni with a high-intensity positron beam |
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Authors: | Oberdorfer Bernd Steyskal Eva-Maria Sprengel Wolfgang Puff Werner Pikart Philip Hugenschmidt Christoph Zehetbauer Michael Pippan Reinhard Würschum Roland |
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Institution: | Institute of Materials Physics, Graz University of Technology, A-8010 Graz, Austria. |
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Abstract: | A high-intensity positron beam is used for specific in?situ monitoring of thermally activated fast defect annealing in Cu and Ni on a time scale of minutes. The atomistic technique of positron-electron annihilation is combined with macroscopic high-precision length-change measurements under the same thermal conditions. The combination of these two methods as demonstrated in this case study allows for a detailed analysis of multistage defect annealing in solids distinguishing vacancies, dislocations, and grain growth. |
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