Effect of ZrB2 on the microstructure, mechanical and tribological properties of Mo–Si–B matrix composites
Effect of ZrB2 on the microstructure, mechanical and tribological properties of Mo–Si–B matrix composites
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DOI：
10.1016/j.ceramint.2023.04.082
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发表时间：
2023-04
影响因子：
5.2
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中科院分区：
文献类型：
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具有良好力学性能和摩擦学性能的复合材料在工程上有着很高的应用需求。为此，制备了zrb2陶瓷含量为2.5 ~ 10 wt%的Mo-12Si-8.5B合金。研究了zrb2含量对合金显微组织、力学性能和摩擦学性能的影响。由于zrb2颗粒的弥散强化，复合材料的密度降低，硬度和强度提高，从而提高了耐磨性。摩擦性能高度依赖于zrb2含量和对应材料。与GCr15钢结合使用时，磨粒磨损和粘接磨损较轻；因此，它具有较好的抗磨性能。当zrb2含量为7.5 wt%时，复合材料的磨损率最小为2.71 × 10−7mm3N−1m−1。
Composites with good mechanical and tribological properties are in high demand for engineering applications. Toward this aim, the Mo–12Si–8.5B alloy with 2.5–10 wt% ZrB2ceramic was prepared. The effects of the ZrB2content on the microstructure, mechanical properties, and tribological behavior were thoroughly investigated. The composites exhibited reduced density and enhanced hardness and strength owing to the dispersion strengthening of ZrB2particles, thus resulting in improved wear resistance. The frictional properties are highly dependent on the ZrB2content and counterpart materials. When coupled with GCr15 steel, it shows much slighter abrasive and adhesive wear; therefore, it presents a more preferable anti-wear performance. The wear rate of the composite with 7.5 wt% ZrB2showed a minimum value of 2.71 × 10−7mm3N−1m−1.