1. Preparation and mechanical properties of (MoCrVMn)2FeB2 based high-entropy cermets.
- Author
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Wang, Tianyu, Ma, Shiqing, Yang, Luhao, Li, Shangxin, Liu, Yang, Li, Bochao, and Hu, Lianhai
- Subjects
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CERAMIC metals , *METAL bonding , *FRACTURE toughness , *POWDERS , *MICROSTRUCTURE , *SINTERING - Abstract
A novel (MoCrVMn) 2 FeB 2 based high-entropy cermets were prepared by two-steps method and the microstructure and mechanical properties were investigated. The single-phase (MoCrVMn) 2 FeB 2 powders were synthesized at 1400 °C for 2 h, and subsequently the (MoCrVMn) 2 FeB 2 based high-entropy cermets were prepared via pressureless sintering technique. The results revealed that the phase evolution was as follows: (Mo, Cr, V, Mn, Fe, B) → (Fe 2 B, V 2 B 3 , MoB) → ((FeVMn) 2 B, (FeVMnCr) 2 B, Mo 2 FeB 2) → (MoCrVMn) 2 FeB 2. The (MoCrVMn) 2 FeB 2 based high-entropy cermets sintered at 1250 °C showed good denseness and the ceramic phases were uniformly distributed in the metal bond, with the optimal mechanical properties of hardness 1355 HV 30 and fracture toughness 19.09 MPa m1/2. With the increase of temperature, the hardness increased first and then decreased, and the fracture toughness was basically unchanged first and then increased, and then decreased. This study provides a new route to further optimize the performance of Mo 2 FeB 2 based cermets. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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