Effect of the Additive of Y2O3 on the Structure Formation and Properties of Composite Materials Based on AlN–SiC

Resumo

The results of studies on the strength at bending and volumetric electrical resistance of composite materials based on AlN–SiC with additions from 2 to 6 wt % Y₂O₃. It is shown that at increasing the content of Y2O3 in the mixture from 2 to 6 wt % the compaction of the composites intensifies their electrical resistance from (1.4–5.4) × 10⁶ to (1.8–5.94) × 10⁷ Ohm·cm (at 20°C), which at the increasing temperature decreases exponentially and at 800°C for all composites is (5–6) × 10⁴ Ohm·cm. It was determined that materials with the smaller content of Y₂O₃ have somewhat higher value of the ultimate strength during bending, namely, 110 MPa.