Abstract Spherical instrumented scratch behavior of ZrB2-SiC composites with and without hybrid boron nitride nanotubes (BNNTs) and boron nitride nanoplatelets (BNNPs) was investigated in this research. Typical brittle fracture such as microcracks both in and beyond the residual groove and grain dislodgement was observed in ZrB2-SiC composite, while hybrid BN nanofiller reinforced ZrB2-SiC composite exhibited predominantly ductile deformation. The peculiar three-dimensional hybrid structure in which BNNPs retain their high specific surface area and de-bundled BNNTs extend as tentacles contributes to the improved tolerance to brittle damage. Additionally, easier grain sliding due to BN hybrid nanofillers located at grain boundaries and these BN hybrid nanofillers attached on the scratch surface would provide significant self-lubricating effect to reduce lateral force during scratch and to alleviate contact damage.

中文翻译：

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氮化硼纳米管/氮化硼纳米片杂化增强ZrB 2 -SiC复合材料的划痕行为

摘要 本研究研究了含有和不含混合氮化硼纳米管 (BNNTs) 和氮化硼纳米片 (BNNPs) 的 ZrB2-SiC 复合材料的球形划痕行为。在 ZrB2-SiC 复合材料中观察到典型的脆性断裂，例如残余凹槽内外的微裂纹和晶粒移位，而混合 BN 纳米填料增强的 ZrB2-SiC 复合材料主要表现出延性变形。BNNPs 保持其高比表面积和解束的 BNNTs 作为触手延伸的特殊三维混合结构有助于提高对脆性损伤的耐受性。此外，