Preliminary communication

Gass presure sintered Si₃N₄ – MgSiN₂ composites

V. Pečínková ; VŠB – Technical University of Ostrava, Faculty of Metallurgy and Materials Engineering, Czech Republic
Z. Lenčéš ; Slovak Academy of Sciences, Institute of Inorganic Chemistry, 849 36, Bratislava, Slovak republic
Z. Jonšta ; VŠB – Technical University of Ostrava, Faculty of Metallurgy and Materials Engineering, Czech Republic

Abstract

Si₃N₄ and MgSiN₂-based ceramic composites have excellent thermo-physical and mechanical properties, however with limited industrial applications. In this paper the preparation of Si₃N₄/ MgSiN₂ composite by gas pressure sintering (GPS) is described and some of the mechanical properties like Vickers hardness and indentation fracture are characterised and compared with hot pressed (HP) samples. The 15,3 GPa hardness and 7,6 MPa∙m1/2 fracture toughness of GPS composites was slightly lower compared to HP samples (16,5 GPa, 8 MPa∙m1/2).

Keywords

ceramic; powder; composites; nitridation; mechanical properties

Hrčak ID:

157465

URI

https://hrcak.srce.hr/157465

Publication date:

1.10.2016.

Visits: 1.303 *