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  1. No Access

    Article

    Laser nitriding of iron: Nitrogen profiles and phases

    Armco iron samples were surface nitrided by irradiating them with pulses of an excimer laser in a nitrogen atmosphere. The resulting nitrogen depth profiles measured by Resonant Nuclear Reaction Analysis (RNRA...

    C. Illgner, P. Schaaf, K. P. Lieb, E. Schubert, R. Queitsch… in Applied Physics A (1995)

  2. No Access

    Article

    Structural changes during Ar-ion irradiation of laser-deposited Fe/Ag multilayers

    During 350 keV Ar+ irradiation at 77K, laser-deposited Fe−Ag multilayers first show stress relaxation and demixing processes at the interfaces followed by grain coarsening and a supersaturation of the bcc α-Fe ph...

    H. U. Krebs, Y. Luo, M. Störmer, A. Crespo, P. Schaaf, W. Bolse in Applied Physics A (1995)

  3. No Access

    Article

    Laser nitriding of iron: Influence of the laser parameters on the nitriding efficiency

    Laser nitriding of Armco iron in nitrogen was studied for KrF-excimer-laser irradiation. The influence of the energy density and number of pulses on the nitrogen take-up and the nitride phases formed was inves...

    C. Illgner, K. -P. Lieb, P. Schaaf, H. Köster, K. Mann, G. Marowsky in Applied Physics A (1996)

  4. No Access

    Article

    Structural and magnetic properties of La/Fe multilayers

    The structural and magnetic properties of La/Fe multilayers were investigated by X-ray diffraction, RHEED, magnetometry and57Fe Mössbauer spectroscopy. Comparison is made with previous results obtained for Ce/Fe ...

    F. Rose, O. Schulte, P. Schaaf, W. Lohstroh, W. Felsch in Applied Physics A (1996)

  5. No Access

    Article

    Analysis of laser-nitrided stainless steel via nuclear methods

    Laser nitriding of iron and other metals is governed by the complicated interplay of the laser–plasma–liquid surface interactions which lead to a superposition of several mechanisms. This article reports on t...

    M. Han, F. Landry, K.-P. Lieb, P. Schaaf in Applied Physics A (1999)

  6. No Access

    Article

    Direct synthesis of β-FeSi2 by ion beam mixing of Fe/Si bilayers

    The iron di-silicide β-FeSi2 is a promising direct band gap semiconductor but difficult to produce. Here, the successful direct synthesis of this phase by ion beam mixing of Fe/Si bilayers at temperatures in the ...

    M. Milosavljevic, S. Dhar, P. Schaaf, N. Bibic, M. Han, K.-P. Lieb in Applied Physics A (2000)

  7. No Access

    Article

    Ion-beam mixing in Fe/Si bilayers by singly and highly charged ions: evolution of phases, spike mechanism and possible effects of the ion-charge state

    Silicide formation and ion beam mixing of Fe/Si bilayers due to Ar-, Xe- and Au-ion irradiations at room and liquid-nitrogen temperatures were investigated. For the study of silicide phase formation, the Fe/Si...

    S. Dhar, P. Schaaf, N. Bibić, E. Hooker, M. Milosavljević, K.P. Lieb in Applied Physics A (2003)

  8. No Access

    Article

    Laser hydriding of crystalline and amorphous silicon

    Crystalline and ion-beam-amorphized silicon samples were irradiated with a pulsed nanosecond excimer laser in a pure hydrogen atmosphere. The hydrogen concentration was determined via the 1H(15N,αγ)12C nuclear re...

    M. Schwickert, E. Carpene, M. Uhrmacher, P. Schaaf, K.P. Lieb in Applied Physics A (2003)

  9. No Access

    Article

    Variation of the mechanical properties of pulsed laser deposited PMMA films during annealing

    The structural and mechanical properties of polymethyl methacrylate (PMMA) thin films produced by pulsed laser deposition in ultra-high vacuum were investigated by infrared spectroscopy, electron microscopy, s...

    E. Süske, T. Scharf, P. Schaaf, E. Panchenko, D. Nelke, M. Buback… in Applied Physics A (2004)

  10. No Access

    Article

    Nitrogen irradiation of Fe/Si bilayers: nitride versus silicide phase formation

    In the course of a systematic investigation of heavy ion-irradiated Fe/Si layers, we have studied atomic transport and phase formation induced by 22-keV 14N2+ ion implantation in 57Fe(30 nm)/Si bilayers at high f...

    V. Milinovic, N. Bibic, S. Dhar, M. Siljegovic, P. Schaaf, K.P. Lieb in Applied Physics A (2004)

  11. No Access

    Article

    Synthesis of highly oriented TiNx coatings by free-electron laser processing of titanium in nitrogen gas

    Titanium substrates were irradiated in pure nitrogen gas by means of a free-electron laser. The treatment resulted in the formation of δ-TiNx coatings, with surface stoichiometry x≈1 and thickness of about 15 μm....

    E. Carpene, M. Shinn, P. Schaaf in Applied Physics A (2005)

  12. No Access

    Article

    The influence of rf plasma time on the carbonitriding treatment of titanium

    Inductively coupled radio frequency plasma surface treatment was applied to commercially pure titanium sheets. The goal was to increase the efficiency of the carbonitriding process, i.e., to decrease the plasm...

    M. Raaif, F.M. El-Hossary, N.Z. Negm, S.M. Khalil, P. Schaaf in Applied Physics A (2007)

  13. Article

    Open Access

    Microstructure of TiN coatings synthesized by direct pulsed Nd:YAG laser nitriding of titanium: Development of grain size, microstrain, and grain orientation

    Pure titanium was irradiated by pulsed Nd:YAG laser irradiation in nitrogen atmosphere. As a result, nitrogen uptake and diffusion occurred and a TiN layer was synthesized at the titanium surface. These TiN co...

    D. Höche, H. Schikora, H. Zutz, R. Queitsch, A. Emmel, P. Schaaf in Applied Physics A (2008)

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