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    Wyświetlanie 1-8 z 8
    Tytuł:
    Present status and prospects of research in SINS on the modification of surface properties by pulsed plasma streams
    Autorzy:
    Langner, J.
    Piekoszewski, J.
    Stanisławski, J.
    Werner, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/146758.pdf
    Data publikacji:
    2000
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    IONOTRON plasma injector
    pulsed plasma processing
    surface modification
    Opis:
    The paper presents examples of the most important results obtained in SINS during the last decade, interesting from the point of view of industrial applications. It also indicates some of the most prospective directions in research on modification of the surface properties of materials by means of pulsed plasma streams.
    Źródło:
    Nukleonika; 2000, 45, 3; 193-197
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An apparatus for sequential pulsed plasma beam treatment in combination with Arc PVD deposition
    Autorzy:
    Stanisławski, J.
    Piekoszewski, J.
    Richter, E.
    Werner, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/147034.pdf
    Data publikacji:
    2002
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    Arc-PVD
    interlayer
    pulse plasma treatment
    Opis:
    A hybrid type of apparatus is described which enables one to form a thin multi-layer film on the surface of any kind of solid substrate. In one process, the surface is treated with a high intensity pulse plasma beam which introduces the chosen kind of atoms into the near-surface layer of the substrate. In the second process, following the first without breaking the vacuum, the coating is formed by arc PVD (physical vapour deposition) process. Two examples of coatings formed on metallic and ceramic substrates are presented.
    Źródło:
    Nukleonika; 2002, 47, 3; 119-122
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigation of Plasma Focus discharges in the PF-360 facility with additional D2 gaspuffed targets
    Autorzy:
    Stanislawski, J.
    Baranowski, J.
    Sadowski, M.
    Zebrowski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/147013.pdf
    Data publikacji:
    2001
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    current sheath
    deuteron beams
    gas puffing
    neutron yield
    plasma focus
    Opis:
    The paper describes experimental studies of Plasma-Focus (PF) discharges carried out within the modernized PF- 360 facility, which was operated with an additional D2-gas puffing into the region of the collapsing current sheath and PF pinch formation, i.e. into space in front of the electrode outlet. The main aim of these studies was to increase a neutron yield from PF discharges by using fast deuteron beams, which are usually emitted from a pinch column and which can interact with additional D2-gas target.
    Źródło:
    Nukleonika; 2001, 46, suppl. 1; 73-75
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Electrode erosion mechanism in the rod plasma injector type of generator as deduced from the structure of irradiated substrates
    Autorzy:
    Piekoszewski, J.
    Stanisławski, J.
    Grotzschel, R.
    Matz, W.
    Jagielski, J.
    Szymczyk, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/147032.pdf
    Data publikacji:
    2002
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    plasma alloying
    plasma melting
    vapor ionization
    Opis:
    Titanium atoms were alloyed into a polycrystalline alundum substrate using a various number of intense pulses consisting of plasma of the working gas and vapor and low energy ions of Ti eroded from electrodes of the rod plasma injector type generator. It appears that at a single pulse titanium always forms a thin metallic film not mixed with the substrate material. With increasing number of pulses the amount of titanium atoms mixed into the substrate increases, whereas the thickness of the film - decreases. Analyses of phase composition and of structural properties, as well as computer simulations of thermal evolution brought the present authors to the conclusion that increase of number of pulses leads to decrease of melting temperature of the top layer of the substrate. It has also been confirmed that metallic ions eroded from electrodes do not undergo such acceleration like working gas ions do; their energy remains on the 200-300 eV level. It is concluded that erosion of the electrode material occurs during the last phase of the discharge via the vacuum arc mechanism.
    Źródło:
    Nukleonika; 2002, 47, 3; 113-117
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Surface modification of plasma-sprayed alumina deposits by high-energy ion beams
    Autorzy:
    Sadowski, M.
    Langner, J.
    Stanisławski, J.
    Matejícek, J.
    Kolman, B.
    Chráska, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/146704.pdf
    Data publikacji:
    2000
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    alumina coatings
    plasma-ion streams
    plasma spraying
    surface modification
    Opis:
    This paper reports on characteristics of alumina-type coatings deposited on steel substrates and treated with pulsed plasma streams containing high-energy ion beams (N, Ar, and Ti+N). Originally matted surfaces of the ceramic layers, which were created by plasma spraying of gray alumina, were changed into shiny ones, and splat boundaries disappeared due to the melting of a thin surface layer. The thickness of this modified layer did not exceed 1 žm. A higher content of Ti was found on the surfaces of the Ti- and N-treated samples only.
    Źródło:
    Nukleonika; 2000, 45, 3; 199-202
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Some problems of plasma-material interactions in fusion devices
    Autorzy:
    Glazunov, G.
    Volkov, E.
    Lapshin, V.
    Tereshin, V.
    Sadowski, M.
    Langner, J.
    Stanisławski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/146712.pdf
    Data publikacji:
    2000
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    boron-carbide erosion
    plasma-material interaction
    TiN-coated stainless-steel
    Opis:
    The paper concerns some questions connected with the interaction of high-temperature plasma-ion fluxes with solid materials inside experimental chambers used for fusion-oriented research, and particularly inside the Torsatron-type facilities. Mechanisms of the boron carbide erosion are described and discussed. Also described is the behaviour of TiN-coated stainlesssteel surfaces under the irradiation with hydrogen plasma-ion fluxes. In summary, there are described damages in the boron carbide layers and changes in the composition of the TiN-coatings.
    Źródło:
    Nukleonika; 2000, 45, 3; 209-213
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Interaction of nitrogen atoms in expanded austenite formed in pure iron by intense nitrogen plasma pulses
    Autorzy:
    Piekoszewski, J.
    Sartowska, B.
    Waliś, L.
    Werner, Z.
    Kopcewicz, M.
    Prokert, F.
    Stanisławski, J.
    Kalinowska, J.
    Szymczyk, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/147989.pdf
    Data publikacji:
    2004
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    alfa-to-gamma phase transformation in iron
    expanded austenite
    intense nitrogen plasma pulses
    Opis:
    The paper presents the results of experiments on modification of pure iron by high-intensity nitrogen pulsed-plasma treatment. The duration of nitrogen plasma pulses is approximately 1 mi s, and the energy density amounts to about 5 J/cm2. Such pulses are capable to melt the surface layer of the substrate (1- 2 mi m) and to introduce a significant concentration of nitrogen into the molten layer. Nuclear reaction analysis (NRA), X-ray diffraction (XRD) and conversion electron Mössbauer spectroscopy (CEMS) were used for characterisation of the treated samples. The main results of the data analysis are as follows: it has been stated that such treatment leads to gradual transformation of initial alfa-phase into austenitic gamma structure in which expanded austenite gammaN is present. Treatment with 20 pulses results in almost complete transformation and introduces a retained dose of nitrogen estimated as 5.5 × 1017 N/cm2. The susceptibility for expansion of the lattice transformed to austenite in this way is smaller than in the case when the steel subjected to conventional nitriding is originally of austenite type. The analysis of the ratio of alfa to gammaN as a function of the nitrogen content provides a firm evidence that strong repulsion forces act between the first and the second nearest-neighbour nitrogen atoms in the fcc austenitic structure formed as a result of nitriding of pure iron by intense nitrogen plasma pulses.
    Źródło:
    Nukleonika; 2004, 49, 2; 57-60
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

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