Details

Autor(en) / Beteiligte

• KIM, Y. W
• OH, Y. W
• YOON, S. Y
• STEVENS, R
• PARK, H. C

Titel

Thermal diffusivity of reaction-sintered AlON/Al2O3 particulate composites

Ist Teil von

• Ceramics international, 2008-12, Vol.34 (8), p.1849-1855

Ort / Verlag

Kidlington: Elsevier Science

Erscheinungsjahr

2008

Quelle

ScienceDirect

Beschreibungen/Notizen

• The thermal diffusivity of particulate composites prepared by sintering compacts of Al2O3 with additions of 1-25 mol% AlN under 1-atm nitrogen gas pressure at 1600-1800 C was measured over the range 25-1000 C using the laser flash method. The diffusivity of reaction-sintered materials decreased on addition of AlN, mainly due to the formation of an AlON phase. This effect was less pronounced with increasing temperature and it appeared to be related to the temperature-dependence of thermal resistance. The influence of crystalline phase, microstructure and physical properties on the thermal diffusivity of AlON/Al2O3 was characterised. The thermal conductivity of the sintered materials at room temperature behaved in a similar manner to the thermal diffusivity. 21 refs.