Seramik Mühendisliği by Institution Author "Turan, Servet"
Now showing items 21-32 of 32
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Novel SiAlON ceramics for cutting tool applications
Mandal, Hasan; Kara, Ferhat; Turan, Servet; Kara, Alpagut (Trans Tech Publications LTD, 2003)New alpha-beta SiAlON ceramics were produced in aqueous medium by Using Multiple oxides as densifying additives. The sintered materials were characterised using a combinations of techniques such as XRD, SEM and TEM. The ... -
Orientation-dependent equilibrium film thickness at interphase boundaries in ceramic-ceramic composites
Turan, Servet; Knowles, K. M. (IOP Publishing LTD, 1997)Theoretical considerations of the Hamaker constant for the interaction of two media across a third suggest that the highly anisotropic nature of the refractive indices of a medium such as h-BN will produce an orientation ... -
Performance of new ?-ß SiAlONs in turning operations
Mandal, Hasan; Kara, Ferhat; Turan, Servet; Kara, Alpagut (2001)New ?-ß SiAlON ceramics were produced, characterised and tested in turning operations of cast iron. Cutting speeds varied between 400-1200 m/min while feeding rates were between 0.3 to 0.5 mm/rev. The results were compared ... -
Performance of new alpha-beta SiAlONs in turning operations
Mandal, Hasan; Kara, Ferhat; Turan, Servet; Kara, Alpagut (Trans Tech Publications LTD, 2002)New alpha-beta SiAlON ceramics were produced, characterised and tested in turning operations of cast iron. Cutting speeds varied between 400-1200 m/min while feeding rates were between 0.3 to 0.5 mm/rev. The results were ... -
Phase studies of reactive infiltrated boron carbide-aluminium composites by quantitative XRD
Arslan, Gökhan; Kara, Ferhat; Turan, Servet (Trans Tech Publications LTD, 2002)Fully dense (> 98 % of theoretical) boron carbide (B4C)-aluminium (Al) composites were produced between 985 degrees and 1370 degreesC by pressureless melt infiltration of Al alloys into porous B4C compacts under an argon ... -
Reactions at ceramic-metal interfaces in capacitor-discharge joined ceramics
Turan, Servet (Transtec Publications LTD, 1999)A capacitor-discharge joining technique has been used to fabricate zirconia-AlxNiyYz zirconia (ZrO2) joints, in addition, the surface of the ZrO2 tiles were sputter coated with Ti and joined using Al as an interlayer ... -
Synthesis of an iron-chromium ceramic pigment by using limonite and chromite mixtures
Özel, Emel; Küçük, I; Turan, Servet (Belgian Ceramic Society, 2003)The pigments, which are important parts of ceramic industry, have been produced by a prolonged expensive process due to a necessity of using very expensive pure oxides. Therefore, it is important to produce pigments from ... -
Transmission electron microscopy of interfaces in structural ceramic composites
Knowles, KM; Turan, Servet; Kumar, A; Chen, SJ; Clegg, WJ (Blackwell Science LTD, 1999)Ceramic composites based either on a particulate, fibre or a lamellar architecture are potentially useful as damage-tolerant high-temperature engineering materials. The ability of the interfaces in such systems to deflect ... -
Transmission electron microscopy of SrO containing multi-cation doped ?-SiAlON ceramics
Turan, Servet; Mandal, Hasan; Kara, Ferhat (2002)An advantage of ?-SiAlON is that it can accommodate cations of sintering additives and hence reduces the amount of deleterious remnant intergranular amorphous phase. However, it is believed that relatively large cations ... -
Transmission electron microscopy of SrO containing multi-cation doped alpha-SiAlON ceramics
Turan, Servet; Mandal, Hasan; Kara, Ferhat (Trans Tech Publications LTD, 2002)An advantage of alpha-SiAlON is that it can accommodate cations of sintering additives and hence reduces the amount of deleterious remnant intergranular amorphous phase. However, it is believed that relatively large cations ... -
Transmission electron microscopy studies of La2O3-doped alpha-SiAlON ceramics
Turan, Servet; Mandal, Hasan; Kara, Ferhat; Knowles, KM (IOP Publishing LTD, 1999)alpha-SiAlON is able to accommodate cations into its crystal structure if the cations are sufficiently small in size, thus helping to reduce the volume of the remnant grain boundary phase after processing. In this study, ... -
Wetting and non-wetting behaviour of silicon carbide grain boundaries
Turan, Servet; Knowles, K. M. (Transtec Publications LTD, 1999)Silicon carbide (SiC) grain boundaries have been observed to be free from intergranular films. On the basis of equilibrium film thickness calculations, it has been proposed elsewhere that because SiC has very high refractive ...