Mechanical properties of magnesia and magnesia-chromite refractory materials

Köksal N., Toparli M., Altun I.

Proceedings of the 8th Conference and Exhibition of the European Ceramic Society, İstanbul, Turkey, 29 June - 03 July 2003, pp.1779-1782 identifier

  • Publication Type: Conference Paper / Full Text
  • Volume:
  • Doi Number: 10.4028/
  • City: İstanbul
  • Country: Turkey
  • Page Numbers: pp.1779-1782
  • Keywords: Fracture toughness, Mechanical properties, Refractory materials, Surface energy
  • Dokuz Eylül University Affiliated: Yes


In this study, modulus of rupture, elastic modulus and fracture toughness values were investigated at elevated temperature for magnesia and magnesia-chromite content of chromite between 6% and 20%. Modulus of rupture and elastic modulus values were calculated by three point bending test at temperatures 400, 600, 800 and 1400°C. Modulus of rupture and Young's modulus values decreased when temperature and content of chromite increased. Modulus of rupture and Young's modulus values at room temperature were compared to the values at 400, 600, 800 and 1400°C. Young's modulus values decreased to about 40% and modulus of rupture values decreased to about 25% of the values at room temperature. The samples were notched as a/h = 0.3 by cutting tool of 0.2 mm thickness. Fracture toughness values were calculated at each temperature. Fracture toughness value at room temperature was compared to the values at 400, 600, 800 and 1400°C. It was seen that fracture toughness values had decreased by the increase at temperature.