Mechanical and tribological performance of (TiNbTaWMo)C high-entropy ceramics in a wide temperature range

• DOI: 10.1016/j.jmrt.2023.04.220
• Publication Date: 2023-04-27T01:30:04Z
• Authors: Yuan Fang; Shunqiang Zhao; Chen Li; Yan Wu; Jicheng Li; Hengzhong Fan
• Keywords: Spark Plasma Sintering; Atmospheric temperature range; High-Entropy Alloys; Vickers hardness test

High-entropy carbide ceramics have attracted extensive attentions for potential applications as high temperature structural materials, the mechanical and tribological performance of (TiNbTaWMo)C high-entropy carbides over wide range combined with oxidation behavior were investigated in present study. successfully prepared from five kinds powders by spark plasma sintering at 2000 °C. The properties room –800 °C studied. Vickers hardness, bending strength fracture toughness sintered are 21.31 ± 0.43 GPa, 477.15 34.17 MPa, 6.41 0.85 MPa m1/2, respectively. At temperature, friction coefficient is stable 0.35, wear rate low 3.39 × 10−7 mm3/Nm. With increasing, increases firstly decreases above 600 °C, which contributed formation oxide films temperatures. mechanisms different temperatures discussed detail microstructures phase analysis worn surfaces together behaviors 800