抄録
Cr2B, CrB and CrB2 ceramics were prepared by hot-pressing of the powders synthesized via the solid state reactions between metallic chromium and amorphous boron powders. Cr2B ceramics were prepared in the temperature range of 1200-1600°C. CrB ceramics were prepared in the temperature range of 1500-1900°C. CrB2 ceramics were prepared in the temperature range of 1400-1900°C. It was observed that CrB2 possesses more excellent sinterability than Cr2B amd CrB. The hardness of CrB2 ceramics increased with the sintering temperature up to 1700°C and then decreased owing to grain coarsening. As an excellent etching method of CrB2 ceramics, the electrolytic etching method was developed.
