Thermal shock behaviour of α:β-SiAlON-TiN composites
Ceramics International, vol.40, no.2, pp.3611-3618, 2014 (SCI-Expanded, Scopus)
- Publication Type: Article / Article
- Volume: 40 Issue: 2
- Publication Date: 2014
- Doi Number: 10.1016/j.ceramint.2013.09.064
- Journal Name: Ceramics International
- Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Page Numbers: pp.3611-3618
- Keywords: Fracture toughness, Oxidation, SiAlON-TiN composites, Thermal shock
- Bilecik Şeyh Edebali University Affiliated: Yes
Abstract
α:β-SiAlON and 10, 17, and 25 wt% TiN particle reinforced composites were produced by a gas pressure sintering method. The densification behavior, phase and microstructural evolution, mechanical and thermal shock behavior of materials were investigated. The TiN incorporation had significant influence on the matrix microstructure and improved fracture toughness of the material. The highest fracture toughness was obtained for the composite with 25 wt% TiN (K1c: 8.2±0.2 MPa m1/2). SiAlON-TiN composites showed lower crack formation and propagation compared to the monolithic SiAlON. Above 700 C passive oxidation took place and provided crack healing by filling the cracks with TiO2, and the thermal shock resistance behavior was improved. © 2013 Elsevier Ltd and Techna Group S.r.l.