Yazar "Ayas, Erhan" için listeleme
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A Novel Approach For Preparing Electrically Conductive SiAlON-TiN Composites by Spark Plasma Sintering
Ayas, Erhan; Kara, Alpagut; Kara, Ferhat (Trans Tech Publications LTD, 2009)An effective approach for preparing electrically conductive SiAlON-TiN composites was developed. Granules of a designed composition of alpha-beta SiAlON was obtained by spray drying and coated with varying amounts of TiO(2) ... -
A novel approach for synthesis of monticellite based bioactive ceramic powders from boron derivative waste
Köroğlu, Levent; Butev, Ezgi; Esen, Ziya; Ayas, Erhan (Elsevier Science BV, 2017)Monticellite bioactive ceramics have a high usage potential as bone graft substitutes due to their superior mechanical properties compared to hydroxyapatite and excellent bioactivity. Turkey has almost 72% of the global ... -
Novel electrically conductive alpha-beta SiAlON/TiCN composites
Ayas, Erhan; Kara, Alpagut (Elsevier Sci LTD, 2011)Electrically conductive alpha-beta SiAlON/TiCN composites were produced in the form of a segregated network in a ceramic matrix structure. A continuous 3D network of conductive TiCN particles was successfully achieved by ... -
Optimization of the optical properties of alpha-SiAlON through a decrease in starting powder size
Kurama, Semra; Avcıoğlu, Suna; Ayas, Erhan (Elsevier Sci LTD, 2015)In the present work, the effects of initial powder size on the sintering behavior and optical properties of Dy-alpha-SiAlON ceramics produced by the SPS technique are investigated. The powders were prepared using high ... -
Oxidation behavior of electrically conductive alpha/beta SiAlON composites with segregated network of TiCN
Çelik, Ali; Ayas, Erhan; Halil, Etem; Kara, Alpagut (Elsevier Sci LTD, 2012)The oxidation behavior of novel electrically conductive alpha/beta SiAlON composites with a continuous network of 2.5-10 vol% TiCN particulates was investigated. Composites, produced by coating spray dried granules with ... -
Pressureless sintering of Al2O3-TiCN composites
Ayas, Erhan; Kara, Alpagut (Trans Tech Publications LTD, 2004)A composition of 70 wt % Al2O3 + 30 wt % TiCN was prepared and pressureless-sintered at temperatures ranging from 1700 to 1840degreesC. In order to achieve densification, a powder bed was also employed. The resultant ... -
Proceedings of the International Symposium on Nitrides V
Mandal, Hasan; Kurama, Semra; Ayas, Erhan (2007)[No abstract available] -
Production of alpha-beta SiAlON-TiN/TiCN composites by gas pressure sintering
Ayas, Erhan; Kara, Alpagut; Mandal, Hasan; Turan, Servet; Kara, Ferhat (Belgian Ceramic Society, 2004)Due to the favorable properties possessed by novel alpha-beta SiAlONs, they are attractive materials for cutting tool applications. Such applications require materials with high hardness, high fracture toughness and high ... -
Reaktif organobentonit katkıların sert poliüretan köpüğün bazı performans özellikleri üzerine etkisi
Erdem, Murat; Ortaç, Kübra; Erdem, Bilge; Türk, Hayrettin (2017)Bu çalışmada; bentonit, amin ve hidroksil fonksiyonelliğine sahip bileşikler ile modifiye edilmiş ve eldeedilen organobentonitler sert poliüretan köpük nanokompozit (SPKN) sentezinde katkı olarakkullanılmışlardır. Poliüretan ... -
Si3N4 esaslı kompozit malzemelerin elektriksel ve ısıl iletkenliklerinin geliştirilmesi
Ayas, Erhan (Anadolu Üniversitesi, 2010)Bu doktora tezinin temel amacı, yalıtkan özelliğe sahip Si3N4 esaslı seramiklerin elektriksel iletkenliğinin arttırılarak fonksiyonel kullanım alanlarını genişletmektir. Bu amaçla çeşitli elektriksel iletkenlik teorileri ... -
Silicon based preceramic polymers as a matrix material in composite technology
Arıca, Tuğçe Aybüke (Anadolu Üniversitesi, 2017)Bu tez çalışmasında, farklı yan gruplara sahip iki öncül seramik polimer, polimetilsilseskioksan (PPSQ) ve polimetilsilseskioksan (PPSQ), matris malzeme olarak seçilmiş ve dört farklı bileşenin (çelik lif, silikon karbür, ... -
Sintering of 94Na(0.5)Bi(0.5)TiO(3)-6BaTiO(3) with SPS and conventional methods for crystal growth
Gürbüz, Mevlüt; Ayas, Erhan; Doğan, Aydın (Korean Assoc Crystal Growth, Inc, 2016)In this study, lead-free 94Na(0.5)Bi(0.5)TiO(3)-6BaTiO(3) (94NBT-6BT) piezoelectric ceramics and embedded single crystals in polycrystalline 94NBT-6BT matrix were sintered by conventional (CS) and spark plasma sintering ... -
Sintering of 94Na0.5Bi0.5TiO3-6BaTiO3 with SPS and conventional methods for crystal growth
Gürbüz, Mevlüt; Ayas, Erhan; Doğan, A. (Hanyang University, 2016)In this study, lead-free 94Na0.5Bi0.5TiO3-6BaTiO3 (94NBT-6BT) piezoelectric ceramics and embedded single crystals in polycrystalline 94NBT-6BT matrix were sintered by conventional (CS) and spark plasma sintering (SPS) ... -
Size evolution of nanomagnetic particles and magnetotransport properties of (Co 90Fe 10) 20Ag 80 nanogranular films: Influence of Cu 80Ag 15Au 5 underlayer
The influence of (Co 90Fe 10) 20Ag 80 film thickness and of Cu 80Ag 15Au 5 underlayer on nanomagnetic, magnetotransport and structural properties of (Co 90Fe 10) 20Ag 80 nanogranular films prepared by ultra-high vacuum ion ... -
Spark plasma sintering of Si3N4-B4C composites
Ayas, Erhan; Kalemtaş, Ayşe.; Arslan, Gökhan; Kara, Alpagut; Kara, Ferhat (Ceramic Soc Japan-Nippon Seramikkusu Kyokai, 2008)In this study the production Of Si3N4-B4C Composites using spark plasma sintering technique was studied. This technique was preferred in order to minimize the reactions between starting constituents. Fully dense Si3N4 ... -
Spark Plasma Sintering of Silicon Nitride-Boron Carbide Composites
Ayas, Erhan; Kalemtaş, Ayşe.; Arslan, Gökhan; Kara, Alpagut; Kara, Ferhat (Trans Tech Publications LTD, 2009)Si(3)N(4)-B(4)C composites containing fine and coarse B(4)C particles were produced using Al(2)O(3) and Y(2)O(3) as sintering additives via spark plasma sintering (SPS) technique. Phase assemblages of the produced composites ... -
Synthesis and characterization of monticellite (CaMgSiO4) based bioactive ceramic powders obtained from boron derivative waste
Köroğlu, Levent (Anadolu Üniversitesi, 2018)Bu tez çalışmasında, ekonomik ve çevreci bir yöntem ile bor türev atığından montiselit esaslı biyoaktif seramik tozlarının sentezlenmesi adına yeni bir yaklaşım sunmak istenmiştir. Bor türev atığından montiselit esaslı ... -
Yüksek sıcaklık uygulamalarına yönelik HfB2-SiC kompozitlerinin geliştirilmesi
Gürcan, Kübra (Anadolu Üniversitesi, 2017)Bu tez kapsamında HfO2, B ve SiC tozlarının spark plazma sinterleme yöntemi ile tek bir ısıl işlem prosesi uygulanarak, yüksek yoğunluk ile yüksek ısıl, mekanik ve oksitlenme direnci özelliği sergileyen HfB2-SiC esaslı ... -
?/ß SiAlON based composites incorporated with MoSi2 for electrical applications
Ayas, Erhan; Kara, Alpagut; Kara, Ferhat (2010)Electrically conductive ?-ß SiAlON composites containing 30 vol. % MoSi2 was prepared by gas pressure sintering (GPS). The effect of sintering atmosphere on phase formation, grain growth, mechanical and electrical properties ...