| 摘要 |
PURPOSE:To improve toughness, transverse rupture strength, hightemperature hardness, thermal and electrical conductivity without any Ti-W-B-based embrittled phase by mixing TiB2 with W, CrB2 and/or B4C, forming the resultant mixture and then sintering the formed compact under ordinary pressure. CONSTITUTION:TiB2 having <=20/mum grain diameter is mixed with W having >=20/mum grain diameter and CrB2 and/or B4C having <=20mum grain diameter and the resultant mixture is then formed and sintered at <=2000 deg.C under ordinary pressure to afford high-hardness titanium boride-based ceramics, containing 25-80wt.% TiB(2-x), 19-60wt.% WB and 1-20wt.% CrB(2-y) and/or B(4-z)C (x, y and z are the amounts of B consumed by reaction with W) and having a structure without any existing Ti-W-B-based embrittled phase. |
