Electrodischarge-Machinable Silicon Carbide Ceramics Sintered with Yttrium Nitrate

摘要

A silicon carbide (SiC) powder compact was prepared with sub-micrometer p-SiC, yttrium nitrate as a sintering additive, and polysiloxane-phenol resin as precursors for nanosized SiC. By hot-pressing, fully dense SiC ceramics with good electrical conductivity, as high as 3 × 10~4 (Ω·m)~(-1) at room temperature, were obtained. The ceramics could be machined to complex shapes by electrodischarge machining.