| 摘要 |
PURPOSE:To obtain the subject material having improved density, strength, hardness and toughness by mixing titanium carbonitride, chromium carbide and (partially) stabilized ZrO2 powder or fiber and sintering the mixture. CONSTITUTION:A mixture is produced by mixing (A) a titanium carbonitride having an average particle diameter of <=2mum and a carbon:nitrogen ratio of 10:90 to 90:10, (B) 1-10wt.% of a chromium carbide (e.g. Cr3C2) having an average particle diameter of <=2mum and (C) 5-80wt.% of (partially) stabilized ZrO2 powder (having an average particle diameter of <=0.2mum) or fiber (having fiber diameter of <=10mum) or mixing the component A with 3-50wt.% of the component B, 10-80wt.% of the component C and (D) 0.5-5wt.% of B4C. The mixture is filled in a graphite mold and hot-pressed at 1300-1600 deg.C for 30-120min in vacuum or in neutral or reducing gas atmosphere under a compressive force of 100-300kg/cm<2>. |
