Yazar "Kilic, A." seçeneğine göre listele

Listeleniyor 1 - 5 / 5
  • Küçük Resim Yok
    Öğe
    Effect of Mo on the magnetic properties of martensitic phase in Fe-Ni-Mo alloys
    (ELSEVIER SCIENCE SA, 2006) Yasar, E.; Gungunes, H.; Kilic, A.; Durlu, T. N.
    The paramagnetic-magnetically ordered transition and the effect of Mo content on the magnetic properties of martensite phase in Fe-30% Ni-x% Mo alloys have been investigated by AC susceptibility and Mossbauer spectroscopy. The results show that martensitic transformation temperature (M(S)) indicates the magnetic transition from paramagnetic to magnetically ordered state. Hyperfine magnetic field, isomery shift and volume fractions of phases were determined by Mossbauer spectroscopy. It is also found that volume fraction of thermally induced martensite and M(S) temperature decreased with the increasing Mo content. (c) 2006 Elsevier B.V. All rights reserved.
  • Küçük Resim Yok
    Öğe
    Effect of Nb addition on the critical parameters of BSCCO superconductor
    (AMER INST PHYSICS, 2007) Sozeri, H.; Ghazanfari, N.; Oezkan, H.; Kilic, A.; Hasanli, N.; Salamin, YI; Hamdan, NM; AlAwadi, H; Jisrawi, NM; Tabet, N
    Pure and Nb2O5 added Bi1.6Pb0.4NbxSr2Ca2Cu3O delta superconductors (0 <= x <= 0.30) were synthesized by the ammonium nitrate melt route. Fraction of the high T-c 2223 phase increases with addition of small amounts of Nb. AC susceptibility and transport measurements showed the optimum Nb concentration as x = 0.10. Nb additions above x = 0.20 decrease significantly the fraction of the high-T-c phase and degrade the superconducting properties.
  • Küçük Resim Yok
    Öğe
    Low-field AC susceptibility in Pr1-xHoxMn2Ge2
    (PERGAMON-ELSEVIER SCIENCE LTD, 2007) Kilic, A.; Kervan, N.; Kervan, S.; Gencer, A.; Ozkan, H.
    We report the structure and magnetic properties of Pr1-xHoxMn2Ge2 (0.0 <= x <= 1.0) germanides by means of X-ray diffraction (XRD), differential scanning calorimetry (DSC) techniques and AC magnetic susceptibility measurements. All compounds crystallize in the ThCr2Si2-type structure with the space group I 4/mmm. Substitution of Ho for Pr leads to a linear decrease in the lattice constants and the unit cell volume. The samples with x = 0 and x = 0.8 have spin reorientation temperature. The results are collected in a phase diagram. (c) 2006 Elsevier Ltd. All rights reserved.
  • Küçük Resim Yok
    Öğe
    Martensitic transformation and magnetic properties of Fe-24.5%Ni-4.5%Si alloy
    (MANEY PUBLISHING, 2007) Gungunes, H.; Yasar, E.; Kilic, A.; Durlu, T. N.
    The effect of austenitising temperature and cooling rate on the morphology and magnetic properties of martensite in Fe-24-5%Ni-4-5%Si alloy has been studied by means of scanning electron microscopy, Mbssbauer spectroscopy and AC susceptibility. Martensite morphology was found to be closely dependent on the austenitising temperature and cooling rate. The changes in volume fraction of martensite and austenite phases, the internal magnetic field of martensite phase and the isomery shift values have been determined by Mbssbauer spectroscopy. The Mbssbauer study revealed that the martensite volume fractions increased with increasing austenitising temperature and cooling rate. Also internal magnetic field of martensite was decreased by increasing the martensite volume fractions. AC magnetic susceptibility measurements showed that the Neel temperatures T-N and the magnetic susceptibility X increase with increasing austenitising temperatures.
  • Küçük Resim Yok
    Öğe
    The influence of aggregate type on the strength and abrasion resistance of high strength concrete
    (ELSEVIER SCI LTD, 2008) Kilic, A.; Atis, C. D.; Teymen, A.; Karahan, O.; Ozcan, F.; Bilim, C.; Ozdemir, M.
    This paper examines the influence of aggregate type on the strength characteristics and abrasion resistance of high strength silica fume concrete. Five different aggregate types (gabbro, basalt, quartsite, limestone and sandstone) were used to produce high strength concrete containing silica fume. Silica fume replacement ratio with cement was 15% on a mass basis. Water-binder ratio was 0.35. The amount of hyperplasticizer was 4% of the binder content by mass. Gabbro concrete showed the highest compressive and flexural tensile strength and abrasion resistance, while sandstone showed the lowest compressive and flexural tensile strength and abrasion resistance. High abrasion resistant aggregate produced a concrete with high abrasion resistance. Three-month compressive strengths of concretes made with basalt, limestone and sandstone were found to be equivalent to the uniaxial compressive strengths of their aggregate rocks. However, the concretes made with quartsite and gabbro aggregate showed lower compressive strength than the uniaxial compressive strength of their aggregate rocks. (c) 2007 Elsevier Ltd. All rights reserved.