Effect Of WC Addition Research Articles

308 TiB_2-CeB_6-WC系固溶析出型硬質セラミックスの機械的性質(OS セラミックス,CMC及びMMC)

TiB_2 is expected to apply as machine element part and structures, because it has high melting point and high hardness. In this present study, (TiB_2-30vol%CeB_6) was added WC to progress its mechanical properties. After mixed TiB_2, CeB_6 and WC powder, hot-pressed at 2173K for 1.8ksec in vacuum with a pressure of 60MPa. And then effect of WC addition on microstructures and some mechanical properties of (TiB_230vol%CeB_6) composites were investigated. The result obtain are summarized follow :(1) The sinterability of (TiB_2-30vol%CeB_6)-WC hard materials is excellent showing approximatelytheoretical density. (2) Addition WC on (TiB_2-30vol%CeB_6) produced WB. These composites recognized existence of solid solution respectively. (3) (TiB_2-30vol%CeB_6)-WC hard materials made its mark on progress of some mechanical properties ; (TiB_2-30vol%CeB_6)-10vol%WC composite had micro-Vickers hardness were 25.2GPa and fracture toughness were 9.85MPam^<1/2>.