抄録
It was previously reported by the present authors that the white ceramics with fine grain size of about 0.8μm showed an excellent transverse-rupture strength as high as about 1.3GPa. Then, the cutting performance of this fine grained ceramics tools was studied comparing with that of commercially available coarse grained white ceramics ones. The cutting performance of Al2O3 -30mass%TiC or Al2O3 -40mass%ZrO2 ceramics tools was also studied for comparison. It was found that the fine grained ceramics tools showed the smallest flank wear among four sorts of tools in turning tests of gray cast iron and carbon steel, and that they were superior to commercially available ceramics tools from the viewpoint of resistance to fracture in different cutting tests.
