Physics / Fizik

Permanent URI for this collectionhttps://hdl.handle.net/11147/6

Browse

Filters

2007 - 200912010 - 20181

Settings

Subject: search.filters.subject.MgB2

Search Results

Now showing 1 - 2 of 2
  • Article
    Citation - WoS: 2
    Citation - Scopus: 2
    The Synthesis of Super-Hydrophilic and Hard Mgb2 Coatings as an Alternative To Electroless Nickel Coatings
    (Slovenska Akademia Vied, 2018) Bülbüll, Ferhat; Güney, M.; Jafarpour, Somaiyeh
    In this study, we report the electroless deposition using an alternative technique for the fabrication of hard and super-hydrophilic MgB2 films. MgB2 films on AZ91 magnesium alloys were prepared using an electroless bath containing magnesium diboride nanopowders, sodium hypophosphite, sodium succinate, sodium acetate, and dimethyl sulfoxide. The electroless deposition was carried out in a bath kept at a bath temperature of 95 degrees C for 60 min. After deposition, the coated samples were annealed at 300 degrees C for 60 min to investigate crystallization, morphology, and the changes in the hardness and wettability. The phase composition, morphology, the hardness, and the contact angle of produced coatings were studied by X-ray diffractometer, scanning electron microscopy, microhardness tester, and contact angle measurement system, respectively. The coatings exhibited a dense and nodular structure with strong grain connections. As-deposited and annealed MgB2 films showed an orientation with the (101) reflection, and the highest hardness value (500 HV0.01) was obtained from the annealed coating. Both synthesized coatings had a super-hydrophilic surface.
  • Article
    Citation - WoS: 3
    Citation - Scopus: 3
    Mgb2 Superconducting Thin Films Grown by Magnetron Sputtering
    (National Institute of Optoelectronics, 2007) Ulucan, Savaş; Özyüzer, Lütfi; Okur, Salih
    In this study, we report the growth and properties of MgB2 thin films on polycrystalline Al2O3 substrates. A composite MgB2 target was produced by MgB2 and Mg powder mixing, using a hot pressing technique. MgB2 thin films were grown on Al 2O3 substrates by d.c. magnetron sputtering, without heating the substrate. To enhance the superconducting properties of the as-grown films and to increase the crystal quality, an ex-situ anneal process was applied. The crystal structure of the thin films was determined by X-ray diffraction. The resistivity versus temperature of the deposited MgB2 thin films was studied to examine the transition temperatures of the films under various magnetic fields. The effects of the annealing temperature and annealing time on the electrical properties of MgB2 thin films are revealed.