Ti3SiC2 MAX FAZININ ELEMENTEL TOZ KULLANILARAK SENTEZİ

Year 2018, Volume: 13 Issue: 3, 156 - 166, 23.07.2018

Ahmet Atasoy Emre Saka Abdullah Koşar

Abstract

MAX seramik ailesinde en dikkat çeken ve
üzerinde en fazla araştırma yapılan sistem Ti-Si-C sistemi ve 312 yapısıdır. Ti₃SiC₂
fazı farklı başlangıç malzemeleri kullanılarak üretilmektedir. Kullanılan
malzemelere bağlı olarak, üretim parametreleri ve yöntemleri farklılık
göstermektedir. Bu çalışmada, titanyum, silisyum ve karbon kullanılarak,
hazırlanan stiokiometrik karışımdan yüksek safiyette Ti₃SiC₂
fazının sentezi çalışılmıştır. Kullanılan başlangıç karışımları ve elde edilen
reaksiyon ürünleri SEM, XRD, XRF, TG/DTA gibi analiz yöntemleriyle analiz
edilmiştir. Deneysel sonuçlara göre, başlangıç karışımında bulunan silisyum
miktarı önemlidir. X-ışınları analizi göstermiştir ki; 1350˚C'de ve iki saat
sinterleme süresinden sonra yapıda 312 MAX fazı oluşmaktadır. Ortamda bulunan
karbon kilit role sahiptir ve fazla karbonun bulunması halinde oluşan MAX fazı,
yüksek sıcaklılarda ikili karbür yapısına dönüşmektedir. 

Keywords

MAX Fazı, Seramik Sistemler, İşlenebilir Seramikler, Ti3SiC2, SEM

SYNTHESIS OF Ti3SiC2 MAX PHASE FROM ELEMENTAL POWDERS

Abstract

In MAX phase material
family, Ti-Si-C system and especially 312 Ti₃SiC₂ phase
is the most attracted and investigated structure. It can be produced from
different methods. As expected, each method differs processing methods,
experimental conditions and parameters depending on the starting composition. In
this article, the processing of high purity Ti₃SiC₂ phase
was studied using Ti, Si and C powders. The powders were mixed in
stoichiometric ratio to obtain pure Ti₃SiC₂ phase. Both
of the initial and the obtained product samples were characterised using SEM,
XRD, XRF, TG/DTA methods. The results showed
that, the silicon content was important and carbon plays critical role. X-ray
diffraction analysis showed that the 312 TiSiC phases was formed after the
sintering at temperature of 1350 ˚C for 2 h. If excess carbon is present in the system,
the formed MAX phase was converted into binary carbide phases. 

Keywords

MAX Phase, Ceramic Systems, Machinable Ceramics, Ti3SiC2, SEM

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