FLEROV LABORATORY of NUCLEAR REACTIONS

Centre of Applied Physics

On Thursday, 7 July 2016, at 11.00 am in the FLNR Conference hall a seminar of the Centre of Applied Physics “Studies of irradiated materials – possibilities of LBM/NCBJ and areas of interest” will be held.

Speaker: Lukasz Kurpaska (National Center for Nuclear Research, st. A. Soltana 7/23, Otwock-Swierk, Poland)

Аннотация:

Number of studies has shown that ion irradiation can be successfully used to simulate the effects caused by neutron irradiation [1]. However, the problem of quantitative analysis of the level of ra-diation damage is a major issue in studies of materials exposed to radiation. Therefore, one could rise a question how to perform valuable experimental and theoretical analysis of irradiated samples.

A method of choice to study the damage level is Rutherford Backscattering channeling technique (RBS/C). Further one, Monte Carlo McChasy code can be used to study dislocation and dislocation loops in crystals. In my talk current status and materials of our interest will be given.

From the experimental point of view, the thickness of the ion irradiated layers usually does not ex-ceed few hundreds of nanometers? Therefore again, one could rise a question how to study irradiat-ed layers. Recent works indicate that nanoindentation technique is currently one of the most popular method for mechanical properties evaluation of thin films [2-3]. It is therefore beyond doubt that this technique can be very interesting for nuclear engineers working in the domain of ion beam irra-diation [4]. Since nanoindentation is a perfect tool to study mechanical properties of thin layers and ion irradiation modify few hundreds of nanometers of the material, the combination of both tech-niques seems to be a great idea to perform selective material study and investigate hardening effects caused by ions/neutrons.

The aim of my talk will be to present: capabilities of LBM/NCBJ, possible areas of interest, current-ly performed measurements and mechanical studies carried out on standard samples in Hot Cell lab. Finally, some examples of mechanical data performed on ion modified samples will be presented.

References:

[1]. J. Jagielski, L. Thome. P. Aubert, O. Maciejak, A. Piatkowska, M. Romaniec, S. Moll, Vacuum 83 (2009) S9
[2]. C. Heintze, F. Bergner, S. Akhmadaliev, E. Alstadt, Journal of Nuclear Materials 472 (2016) 196
[3]. J.M. Wheeler, D.E.J. Armstrong, W. Heinz, R. Schwaiger, Current Opinion in Solid State and Material Science 19 (2015) 354
[4]. L. Kurpaska, J. Jagielski, Nuclear Instruments and Methods in Physics Research B 379 (2016) 112