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  • Oxygen diffusion in the non-evaporable getter St 707 during heat treatment = Difuzija kisika v getru St 707 med toplotno obdelavo
    Avdiaj, Sefer ...
    The oxygen diffusion and microstructure were investigated in specimens of commercial Non Evaporable Getter under the trademark of St 707, which is an alloy of Zr(70)-V(24.6)-Fe(5.4) using EDS, AES ... and XRD. Specimens were in the form of tablets compressed from St 707 powder of typical particle size from 50 m to 100 m. To obtain an observable amount of oxygen in the bulk material,we loaded the getter specimen at 450 °C at oxygen partial pressure of 1.2 10-4 Pa for 1 h. Using AES and EDS we investigated the distribution ofoxygen in different phases of the alloy. From the concentration profile, we can see the considerable diffusion length of the oxygen into the getter. This diffusion length is much larger in the Laves phase compared to the zirconium phase. On the zirconium phase two different layers are formed, an oxide layer composed of ZrO2 followed by a diffusion layer, while on the Laves phase only a diffusion layer can be found. In this paper, we also determined the phases present in our materials, as well as the changes of these phases after oxidation.
    Vir: Materiali in tehnologije = Materials and technology. - ISSN 1580-2949 (Letn. 45, št. 1, jan.-feb. 2011, str. 33-37)
    Vrsta gradiva - članek, sestavni del
    Leto - 2011
    Jezik - angleški
    COBISS.SI-ID - 850602

    Povezava(-e):

    Digitalna knjižnica Slovenije - dLib.si

vir: Materiali in tehnologije = Materials and technology. - ISSN 1580-2949 (Letn. 45, št. 1, jan.-feb. 2011, str. 33-37)

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