21-111 INFLUENCE OF GRAİN SİZE ON MECHANICAL PROPERTIES OF Al2O3 – SiC COMPOSİTES


INFLUENCE OF GRAIN SIZE ON MECHANICAL
PROPERTIES OF Al2O3 – SiC COMPOSITES
Composite material of Al2O3/SiC was prepared by pressing Al2O3 and
SiC powders. The mechanical properties, including flexural strength,
compression strength, hardness, and resilience were studied. The amount of
SiC was 20, 30, and 40 vol. %. Sintering was done at 1650 oC for 1 h soaking
time in air. Porosity decreases as grain size of SiC is increasing. As increasing
the particle size the resistance of flexion decreases, the resistance of
compression is decreasing, HRA is highest for 20 % vol. SiC, and resilience is
highest for 40 vol.% SiC.
Keywords: Al2O3/SiC composites, flexural strength
Cuvinte cheie: compozite Al2O3/SiC, rezistenţă la încovoiere

111 INFLUENCE OF GRAİN SİZE ON MECHANICAL