| 摘要 |
Ceramic sintered body based on metal boride and having a high density, which consists essentially of the following three components: (A) one of the compounds TiB2, ZrB2, HfB2, VB2, TaB2, NbB2, MnB2, MoB2, YB2, AlB2, MgB2, CrB, VB, TaB, NbB, MoB, HfB, YB, ZrB, HfB, TiB, MnB, W2B5 and Mo2B5, (B) a metal binder comprising at least one of the borides cobalt boride, nickel boride and iron boride, and (C) from 0.1 to 10 % by weight of a total amount of at least one dicarbide containing Ti, Zr, W and C, a carbonitride or dicarbonitride removing TiCn and containing Ti, Zr, Hf and C, N. The sintered body does not easily oxidise, has an extremely small amount of pores and possesses a high impact strength, even when using a pulverulent raw material, since its (C) component has a deoxidising action.
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