Bor Karbür / Bor Karbür Silisyum Tabakalı Kompozitlerin Spark Plazma Sinterleme Tekniği İle Üretimi Ve Karakterizasyonu

dc.contributor.advisor Şahin, Filiz tr_TR
dc.contributor.author Çağlar, Ela tr_TR
dc.contributor.authorID 10065724 tr_TR
dc.contributor.department Metalurji ve Malzeme Mühendisliği tr_TR
dc.contributor.department Metallurgical and Materials Engineering en_US
dc.date 2015 tr_TR
dc.date.accessioned 2018-05-18T13:43:58Z
dc.date.available 2018-05-18T13:43:58Z
dc.date.issued 2015-02-17 tr_TR
dc.description Tez (Yüksek Lisans) -- İstanbul Teknik Üniversitesi, Fen Bilimleri Enstitüsü, 2015 tr_TR
dc.description Thesis (M.Sc.) -- İstanbul Technical University, Institute of Science and Technology, 2015 en_US
dc.description.abstract Bu çalışmada farklı hacim yüzdelerinde silisyum katkısı içeren tabakalı yapıdaki fonksiyonel dereceli kompozitler spark plazma sinterleme metoduyla 1300-1725°C sıcaklıkları arasında, vakum ortamında, 40 MPa basınç altında üretilmiştir. Saf bor karbür taban üzerine hacimce %5, %10, %15 oranlarında silisyum metal tozu katkılı bor karbür tabakası eklenerek, yüksek yoğunluk ve mekanik özelliklere sahip fonksiyonel dereceli kompozitlerin hangi sinterleme parametrelerinde elde edildiği gözlemlenmiştir. Elde edilen numunelerin yoğunluk, sertlik, kırılma tokluğu ölçümleri yapılıp, oluşan fazlar ve mikroyapılar X-ışınları analizi ve taramalı elektron mikroskobu kullanılarak incelenmiş, katkı maddesi ve sıcaklığın sinterleme davranışları üzerine etkisi araştırılmıştır. tr_TR
dc.description.abstract In this study, B4C/B4C-Si functional graded composites heve been produced by adding different volume amount of silicon powder to boron carbide powder on a pure B4C substrate by spark plasma sintering technique. It is preferred to sinter boron carbide with spark plasma system cause of advantages of this system such as sintering at lower temperatures, at lower pressure and accomplishment on materials which are hard to be densified due to their chemical properties. SPS process is basically a modification of hot pressing and the fundamental difference is that high electric current passes directly through the pressing mould and powder compact, whereas a powder compact in a diepunch assembly is heated by external heating source in hot. Typically, the die-punch assembly in hot pressing is heated by external heating with the heating coils being placed around the inner wall of the vacuum chamber. On the contrary, the sample and die in the SPS process are heated by Joule's heating with the current passing partly through die and rest through the powder compact, depending on temperature and thermophysical properties of the powder compact. As far as the characteristics of the starting powders are concerned, conducting powders are heated by Joule effect and by heat transfer from the die-punch, while the nonconductive powders are heated only through the heat transfer from the die-punch. The SPS process utilizes pulsed high DC along with uniaxial pressure to enhance consolidation of powders. During the process, the combination of a low-voltage, high intensity pulsed DC and uniaxial pressure are simultaneously applied, which in turn offers the possibilities of using rapid heating rates and very short holding times to obtain highly dense samples. en_US
dc.description.degree Yüksek Lisans tr_TR
dc.description.degree M.Sc. en_US
dc.identifier.uri http://hdl.handle.net/11527/15673
dc.publisher Fen Bilimleri Enstitüsü tr_TR
dc.publisher Institute of Science and Technology en_US
dc.rights Kurumsal arşive yüklenen tüm eserler telif hakkı ile korunmaktadır. Bunlar, bu kaynak üzerinden herhangi bir amaçla görüntülenebilir, ancak yazılı izin alınmadan herhangi bir biçimde yeniden oluşturulması veya dağıtılması yasaklanmıştır. tr_TR
dc.rights All works uploaded to the institutional repository are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. en_US
dc.subject Bor Karbür tr_TR
dc.subject Silisyum tr_TR
dc.subject Kompozit tr_TR
dc.subject Seramik tr_TR
dc.subject Tabakalı tr_TR
dc.subject Spark Plazma Sinterleme tr_TR
dc.subject Boron Carbide en_US
dc.subject Silicon en_US
dc.subject Composite en_US
dc.subject Ceramics en_US
dc.subject Fgm en_US
dc.subject Spark Plasma Sintering en_US
dc.subject Sps en_US
dc.title Bor Karbür / Bor Karbür Silisyum Tabakalı Kompozitlerin Spark Plazma Sinterleme Tekniği İle Üretimi Ve Karakterizasyonu tr_TR
dc.title.alternative Production And Characterization Of Boron Carbide / Boron Carbide Silicon Layered Composites By Spark Plasma Sintering en_US
dc.type Thesis en_US
dc.type Tez tr_TR
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