@article{RymarczykCzerwoszRichter2011, author = {Rymarczyk, Joanna and Czerwosz, Elzbieta and Richter, Asta}, title = {Topography and nanomechanical properties of Pd-C films}, series = {Central European Journal of Physics}, volume = {9}, journal = {Central European Journal of Physics}, number = {2}, issn = {2391-5471}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:526-opus4-9649}, pages = {300 -- 306}, year = {2011}, abstract = {Atomic force microscopy (AFM) topographical studies and results of nanoindentation experiment for several palladium-carbon films (Pd-C film) deposited on various substrates and with varying palladium content are presented. Pd-C films were prepared by a physical vapor decomposition (PVD) process and next were modified by a chemical vapor decomposition (CVD) method to obtain carbonaceous porous structure with dispersed palladium nanograins and a variation in roughness. The dependence of film topography on the kind of substrate such as Al2O3, Mo polycrystalline foil and fused silica was studied by AFM. Nanomechanical properties such as hardness and the reduced indentation modulus were determined by nanoindentation. A comparison of these values for films with different Pd content deposited on various substrates is presented.}, language = {en} } @misc{RichterChenKoegleretal.2011, author = {Richter, Asta and Chen, Chun-Liang and K{\"o}gler, Reinhard and Talut, Georg}, title = {Irradiation effects in nanostructured FeCrAl oxide dispersion strengthened steel}, series = {Wissenschaftliche Beitr{\"a}ge 2011}, volume = {15}, journal = {Wissenschaftliche Beitr{\"a}ge 2011}, issn = {0949-8214}, doi = {10.15771/0949-8214_2011_1_10}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:526-opus-1112}, pages = {73 -- 79}, year = {2011}, abstract = {Nanostructured ferritic oxide dispersion strengthened (ODS) alloy is an ideal candidate for fission/fusion power plant materials, particularly in the use of a first-wall and blanket structure of a next generation reactor. These steels usually contain a high density of Y-Al-O nanoparticles, high dislocation densities and fine grains. The material contains nanoparticles with an average diameter of 21 nm. Irradiation of these alloys was performed with a dual beam irradiation of 2.5 MeV Fe+/31 dpa and 350 keV He+/18 appm/dpa. Irradiation causes atomic displacements resulting in vacancy and self-interstitial lattice defects and dislocation loops. Additionally to structural changes, the effect of the irradiation generated defects on the mechanical properties of the ODS is investigated by nanoindentation. A clear hardness increase in the irradiated area is observed, which reaches a maximum at a close surface region. This feature is attributed to synergistic effects between the displacement damage and He implantation resulting in He filled vacancies.}, language = {en} }