Pressureless sintering of hexagonal boron nitride powders

Ay N., Tore I.

5th International Symposium on Nitrides, Eskişehir, Turkey, 3 - 05 April 2006, vol.554, pp.207-208, (Full Text)

  • Publication Type: Conference Paper / Full Text
  • Volume: 554
  • Doi Number: 10.4028/www.scientific.net/msf.554.207
  • City: Eskişehir
  • Country: Turkey
  • Page Numbers: pp.207-208
  • Keywords: hexagonal boron nitride, pressureless sintering, additive, characterization, COMPOSITES, BEHAVIOR
  • Anadolu University Affiliated: Yes

Abstract

Pressureless sintering of hexagonal boron nitride (BN) with and without additives was performed using a powder which was previously nitrided at 900 degrees C and then heat treated at 1400 degrees C. Sintering additives were B2O3 (2, 4, 6 wt %) and Y2O3 (2, 4, 6 wt %) and sintering temperatures was 1900 degrees C. Sintered samples were characterized by XRD, SEM, micro hardness, density and mercury porosimeter measurements. Maximum density values of samples were 1.56 g/cm(3) without additives and 1.63 g/cm(3) with additives. Hardness values of samples were found to improve with the presence of additives.