Characterization and MEchanical Properties of Tetragonal Zirconia Reinforced Cr3C2Ni(Cr) Cermet Composites

Year 2014, Volume: 14 Issue: 3, 375 - 380, 01.12.2014

Ali Özer Yahya Kemal Tür

Abstract

Cermets are widely used in cutting tool industry. Commercial brands are also usable under different patents. In this study, the effect of 3Y-TZP reinforcements on the sintering behaviors and mechanical properties of Cr3C2-Ni(Cr) cermets were investigated. Sintering kinetics were studied by sintering at three different temperatures and formed phases were evaluated by XRD and SEM analysis. To investigate the effect of reinforcement on the mechanical properties, the elastic modulus, hardness and fracture toughness experiments were carried out. 1300°C was found as sintering temperature from sintering kinetic studies. Elastic modulus, hardness and fracture toughness values were found as 307 GPa, 10.5 GPa and 12.1 MPa.√m, respectively. © Afyon Kocatepe Üniversitesi

Keywords

3Y-TZP SEM Organo-Steric Entrapment Sintering Fracture

Tetregonal Zirkonya KAtkılı Cr3C2NiCr Sermet Kompozitlerin Karakterizasyonu ve Mekanik Özellikleri

Abstract

Sermetler yaygın olarak kesici takım ucu olarak kullanımlarıdır. Buna yönelik ticari markalar da farklı isimler altında patentlenmiş ve kullanıma sunulmuştur. Bu çalışmada, tetragonal zirkonya katkılı Cr3C2Ni(Cr) sermetlerin sinterlenme davranışları ve bu katkıların mekanik özelliklere etkileri incelenmiştir. Sinterlenme davranışlarının belirlenmesi için üç farklı sıcaklıkta kinetik çalışmaları yapılmış ve oluşan fazlar XRD ve SEM ile incelenmiştir. Katkıların mekanik özelliklere etkisini incelemek için elastik modül, sertlik ve kırılma tokluğu deneyleri yapılmıştır. Elde edilen veriler ışığında, sinterleme sıcaklığı 1300°C olarak belirlendi. Elastik modül, sertlik ve kırılma tokluğu değerleri de 1300°C'de yapılan sinterleme sonucunda %2 3Y-TZP katkılı sermette sırasıyla 307 GPa, 10.5 GPa ve 12.1 MPa.√m olarak belirlenmiştir

Keywords

3Y-TZP SEM Organik-Sterik Yakalama Sinterleme Kırılma

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