<abstract xmlns="http://www.w3.org/1999/xhtml">

Advanced high-entropy (Hf-Ta-Zr-Nb-Ti)C ceramics were successfully fabricated by the combination of ball milling and a two-step sintering process at 2100 °C for 5, 10, and 20 minutes from commercially available powders. The microstructure characteristics and mechanical properties of the developed systems were investigated. The high-entropy ceramics exhibit: medium grain size from 8 μm to 11 μm, high compositional uniformity, and high relative density above 99.5 %. Vickers hardness for all systems decreased with increasing applied load, with the highest value HV1 = 22.0 GPa for the system sintered for 5 minutes, while the fracture toughness changed from 2.70 MPa.m1/2 to 3.50 MPa.m1/2. The highest four-point flexural strength of 284 MPa was measured for the system with the smallest grain size.
</abstract>

Advanced high-entropy (Hf-Ta-Zr-Nb-Ti)C ceramics were successfully fabricated by the combination of ball milling and a two-step sintering process at 2100 °C for 5, 10, and 20 minutes from commercially available powders. The microstructure characteristics and mechanical properties of the developed systems were investigated. The high-entropy ceramics exhibit: medium grain size from 8 μm to 11 μm, high compositional uniformity, and high relative density above 99.5 %. Vickers hardness for all systems decreased with increasing applied load, with the highest value HV1 = 22.0 GPa for the system sintered for 5 minutes, while the fracture toughness changed from 2.70 MPa.m1/2 to 3.50 MPa.m1/2. The highest four-point flexural strength of 284 MPa was measured for the system with the smallest grain size.

Effect of Sintering Time on Mechanical Properties of (Hf-Ta-Zr-Nb-Ti)C

Technical University of Kosice, Faculty of Materials, Metallurgy, and Recycling

Powder Metallurgy Progress

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

{"article-title":"Effect of Sintering Time on Mechanical Properties of (Hf-Ta-Zr-Nb-Ti)C"}

Advanced high-entropy (Hf-Ta-Zr-Nb-Ti)C ceramics were successfully fabricated by the combination of ball milling and a two-step sintering process at 2100 °C...

Effect of Sintering Time on Mechanical Properties of (Hf-Ta-Zr-Nb-Ti)C

Online veröffentlicht: 29. Dez. 2022

Seitenbereich: 50 - 57

DOI: https://doi.org/10.2478/pmp-2021-0006

Schlüsselwörter
high-entropy carbide, spark plasma sintering, XRD analysis, Vickers hardness, indentation fracture resistance, bending strength

© 2022 Lenka Dakova et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Effect of Sintering Time on Mechanical Properties of (Hf-Ta-Zr-Nb-Ti)C

Online veröffentlicht: 29. Dez. 2022

Seitenbereich: 50 - 57

DOI: https://doi.org/10.2478/pmp-2021-0006

Schlüsselwörterhigh-entropy carbide, spark plasma sintering, XRD analysis, Vickers hardness, indentation fracture resistance, bending strength

© 2022 Lenka Dakova et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Schlüsselwörter
high-entropy carbide, spark plasma sintering, XRD analysis, Vickers hardness, indentation fracture resistance, bending strength