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  • Küçük Resim
    Öğe
    Effect Of B4C Addıtıon On The Mıcrostructure,Hardness And Dry-Slıdıng-Wear Performance Of AZ91 Composıtes Produced Wıth Hot Pressıng
    (IMT, 2019) Özdemir Öge, Tuba; Öge, Mecit; Yılmaz, Volkan Murat; Özdemir, Firdevs Banu
    metallurgy and hot pressing to examine their microstructure, hardness and dry-sliding-wear performance. Powder compositions were verified with XRD and the microstructure of the sintered composites was evaluated using SEM (Scanning Electron Microscope) and EDS analyses. Hardness measurements and dry-sliding-wear tests were performed to evaluate the effect of reinforcement addition on the hardness and wear performance of the fabricated composites. Hot pressing of the composite with 50 w/% B4C required a significantly higher sintering pressure at the same sintering temperature. Increasing the B4C addition resulted in increased hardness values for all the composites, whereas the lowest worn volume and coefficient of friction were obtained with 10 w/% B4C.
  • Küçük Resim
    Öğe
    Spectroscopic and Theoretical Investigation of Pioglitazone with FT-IR, Raman, UV-Vis. and NMR
    (Erzincan Üniversitesi, 2022) Özdemir, Firdevs Banu; Özdemir Öge, Tuba; Sağlam, Adnan; Öge, Mecit; Keskiner, Ali Ünsal
    Geometric structures, bond lengths, bond angles, vibrational frequencies, dipole moments, proton and carbon-13 NMR isotropic chemical shifts, UV-Vis. Parameters, HOMO and LUMO energies of pioglitazone molecules were studied using Gaussian09 program with DFT/B3LYP method at the 6-311G++(2d,2p) basis set. The assignments of theoretical vibrational modes were obtained using VEDA 4 software in terms of potential energy distribution (PED). The spectroscopic characterizations of pioglitazone molecule were performed using FT-IR, Laser-Raman, and NMR chemical shift and UV-vis. experimental methods. Theoretically obtained geometric parameters, vibrational wavenumbers and NMR chemical shifts will also be compared with the experimental results.