Using micrometer‐ and nano‐sized SiC particles as reinforcement phase, two ZrB₂‐SiC composites with high strength up to 1600°C were prepared using high‐energy ball milling, followed by hot pressing. The composite microstructure comprised finer equiaxed ZrB₂ and SiC grains and intergranular amorphous phase. The temperature dependency of flexure strength related to the initial particle size of SiC. In the case of micrometer‐sized SiC, the high‐temperature strength was improved up to 1500°C compared to room‐temperature strength, but the strength degraded at 1600°C, with strength values of 600‐770 MPa. In the case of nano‐sized SiC, the enhanced high‐temperature strength was observed up to 1600°C, with strength values of 680‐840 MPa.

中文翻译：

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具有微米级和纳米级SiC颗粒的ZrB2基复合材料的高温力学行为

使用微米级和纳米级SiC颗粒作为增强相，通过高能球磨，然后热压，制备了两种强度高达1600°C的ZrB ₂ -SiC复合材料。复合材料的微观结构包括更细的等轴ZrB ₂和SiC晶粒以及晶间无定形相。弯曲强度的温度依赖性与SiC的初始粒径有关。使用微米级SiC时，与室温强度相比，高温强度最高可提高到1500°C，但在1600°C时强度会下降，强度值为600-770 MPa。对于纳米级SiC，在1600°C时观察到高温强度有所增强，强度值为680-840 MPa。