Yazarlar

• Aksakal, B.(1)
• Dikici, B.(1)
• Ilkiliç, Cumali(1)
• Islak, S.(1)
• Islak, Serkan(1)
• Kir, D.(1)
• Kir, Durmus(1)
• Nakai, M.(1)
• Niinomi, M.(1)
• Say, Y.(1)
• Topuz, M.(1)
• Yilmazer, H.(1)
• Çelik, E.(1)
• Çelik, Ertugrul(1)
• Özorak, C.(1)

• MakaleYalnız künye2018Scopus SJRQ3/r/munzur/3648
  Synthesis and Characterization of Hydroxyapatite/TiO2 Coatings on the β-Type Titanium Alloys with Different Sintering Parameters using Sol-Gel Method

  Dikici, B.; Niinomi, M.; Topuz, M.; Say, Y.; Aksakal, B.; Yilmazer, H.; Nakai, M.

  In this study, hydroxyapatite (HA) based composite films were successfully syntheses on the β-type Ti29Nb13Ta4.6Zr (TNTZ). The solutionized TNTZ substrates coated with HA and HA/Titania (TiO2) bioactive composite coatings by sol-gel method under various sintering parameters related to sintering temperatures and heating ramp rates. Microstructural observations of the coatings revealed that apatite was formed on the substrates. The hardness values of the coatings increase with increasing both the sintering temperature and the TiO2 concentration in the coatings layer. However, it was found that the heating ramp rate of the sintering was not affecting the hardness values so much. Also, the hardness values of the HA/TiO2 composite coatings at all sintering temperatures were higher than only HA coated TNTZ samples due to the existence TiO2 phases in the HA matrix. Results indicating that the doping of HA with TiO2, improve the physical consistency between the coating layer and the substrates and provide a better inter-particle bonding due to the existence TiO2 phases in the HA.

  AtıfScopus42·OpenAlex43

  İncele
• MakaleYalnız künye2016Scopus SJRQ3/r/munzur/4124
  Characterization of hot pressed CuAl-TiC composites with different TiC grain sizes

  Islak, S.; Çelik, E.; Kir, D.; Özorak, C.

  In this study, the CuAl-TiC composite materials were produced using hot pressing process. Effect of TiC grain size (0.2, 4 and 20 mu m) on some properties of these materials was investigated experimentally. Production of CuAl-TiC composites was carried out under pressure of 35 MPa, at 700A degrees C, and for a sintering time of 5 minutes. SEM-MAP studies showed that the TiC grains were relatively homogeneously distributed in the CuAl matrix. Microstructure analysis revealed that the composite materials consist of Cu, Al, Cu9Al4, CuAl2 and TiC phases. With the decreasing of TiC grain size, the hardness, transverse rupture strength, relative density and sintered density of composites increased.

  AtıfWoS7·OpenAlex8

  İncele
• MakaleYalnız künye2013Scopus SJRQ3/r/munzur/4238
  Microstructure and mechanical properties of PM Fe-Cu-Al2O3 alloys

  Çelik, Ertugrul; Islak, Serkan; Kir, Durmus; Ilkiliç, Cumali

  The purpose of this study was to investigate the effect of Cu addition on the microstructure and mechanical properties of PM Fe-Cu-Al2O3 alloys produced using hot-pressing method. Copper powder was added to iron powder at 5 wt.%, 10 wt.% and 15 wt.% rates. Production of Fe-Cu-Al2O3 alloys was carried out under pressure of 35 MPa, at 750, 800 and 850 degrees C, and for a sintering time of 4 minutes. Microstructure phase composition, relative density, hardness, and transverse rupture strength of the alloys were investigated. Phase composition and microstructure of the alloys were characterised by optical microscopy, X-ray diffraction and scanning electron microscope (SEM-EDS) techniques. The transverse rupture strength (TRS) of the samples was assessed by means of a three-point bending test. Hardness of Fe-Cu-Al2O3 alloys changed between 57 HB and 110 FIB depending on the amount of Cu and sintering temperature. Results show that the TRS of the alloys decreased together with the increase in the amount of copper, while it increased with increasing sintering temperature.

  AtıfWoS2

  İncele