Characterization of High Temperature Strength of Si3N4Composite Ceramics According to the Amount of SiO2Nano Colloidal Added
SiO2나노 콜로이달 첨가량에 따른 Si3N4의 고온강도 특성

Ki-Woo Nam, Kun-Chan Lee
2009 Transactions of the Korean Society of Mechanical Engineers A  
This study analyzed the characterization of high temperature strength of Si3N4 composite ceramics additive based on variations in the amount of nano colloidal SiO2 added. Semi-elliptical cracks about 100 m length were obtained from a Vickers indenter using a load of 24.5 N. The results showed μ that the heat-treated smooth specimens with SiO2 nano colloidal coating exhibited the highest bending strength at 0.0 wt% SiO2 nano colloidal added, which is amounted to a 187 % increase over that of
more » ... se over that of smooth specimen. Limiting temperature for bending strength of crack-healed zone for bending strength was about 1273 K. However, the bending strength of SSTS-3 and SSTS-4 was considerably increased while that of SSTS-1 and SSTS-2 was decreased at a temperature of 1,573K.
doi:10.3795/ksme-a.2009.33.11.1233 fatcat:a2zahu4axnah7fkjrfxjxjq5he