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首页> 外文期刊>CERAMICS INTERNATIONAL >Spark plasma sintering of B4C-TiB2-SiC composite ceramics using B4C, Ti3SiC2 and Si as starting materials
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Spark plasma sintering of B4C-TiB2-SiC composite ceramics using B4C, Ti3SiC2 and Si as starting materials

机译：使用B4C，Ti3SIC2和Si作为起始材料的B4C-TIB2-SIC复合陶瓷的火花血浆烧结

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摘要

Almost fully dense B4C-TiB2-SiC composite ceramics with high flexure strength and good fracture toughness were fabricated through in-situ reaction between B4C, Ti3SiC2 and Si using spark plasma sintering method at a relatively low temperature of 1650 degrees C. The intergranular and intragranular structure containing nanoparticles with different phase were introduced into the composite ceramic. The nano and micro particles in the microstructure formed a multi-scale particles reinforced structure. The refined matrix grains and the multi-scale reinforcing particles had a synergetic effect on improving the mechanical properties of the composite ceramics. As a result, B4C-TiB2-SiC composite ceramic with 30 wt% (TiB2 + SiC) exhibits low density and optimum mechanical properties with high flexural strength of 531.2 MPa, good fracture toughness of 5.77 MPa m(1/2) and moderate micro-hardness of 28.6 GPa.
机译：通过在1650℃的相对低温下使用火花等离子体烧结方法在B4C，Ti3SIC2和Si之间的原位反应来制造具有高弯曲强度和良好断裂韧性的具有高弯曲强度和良好断裂韧性的完全致密的B4C-Tib2-SiC复合陶瓷。 将含有不同相纳米颗粒的结构引入复合陶瓷中。 微结构中的纳米和微颗粒形成了多尺度颗粒增强结构。 精制基质晶粒和多级增强颗粒对改善复合陶瓷的力学性能具有协同作用。 结果，具有30wt％（Tib2 + SiC）的B4C-Tib2-SiC复合陶瓷具有低密度和最佳机械性能，具有531.2MPa的高弯曲强度，良好的断裂韧性为5.77MPam（1/2）和中等微量 - 28.6 GPA的硬度。

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