Abstract—

We have studied the effect of ZrC and ZrO₂ additions on the microstructure and properties of ceramic composites based on ZrB₂–5% SiC, produced by pressure-sintering mechanically activated powders at a temperature of 1600°C. The results demonstrate that the addition of ZrO₂ increases the density, hardness, and fracture toughness of ceramic composites based on ZrB₂–5% SiC. In particular, the K_Ic of the ZrB₂–5% SiC ceramic is 4.6 ± 0.3 MPa m^1/2 and that of the composite containing 20% ZrO₂ is 7.3 ± 0.4 MPa m^1/2.

中文翻译：

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ZrC和ZrO 2的添加对ZrB 2 -SiC陶瓷的组织和性能的影响

摘要—

我们已经研究了ZrC和ZrO _2的添加对基于ZrB ₂ –5％SiC的陶瓷复合材料的微观结构和性能的影响，该陶瓷复合材料是通过在1600°C的温度下加压烧结机械活化的粉末而制得的。结果表明，添加ZrO _2可以提高基于ZrB ₂ -5％SiC的陶瓷复合材料的密度，硬度和断裂韧性。特别是ZrB ₂ -5％SiC陶瓷的K _Ic为4.6±0.3 MPa m ^1/2，而含20％ZrO ₂的复合材料的K _Ic为7.3±0.4 MPa m ^1/2。