@article{LUO2022, 
author = {Si-Chun LUO and Wei-Ming GUO and Kevin PLUCKNETT and Hua-Tay LIN},
title = {Low-temperature densification of high-entropy (Ti,Zr,Nb,Ta,Mo)C–Co composites with high hardness and high toughness},
year = {2022},
journal = {Journal of Advanced Ceramics},
volume = {11},
number = {5},
pages = {805-813},
keywords = {high-entropy carbide ceramics, liquid-phase sintering, microstructure, grain size, mechanical properties},
url = {https://www.sciopen.com/article/10.1007/s40145-022-0574-6},
doi = {10.1007/s40145-022-0574-6},
abstract = {In order to prepare high toughness (Ti,Zr,Nb,Ta,Mo)C ceramics at low temperatures while maintaining high hardness, a liquid-phase sintering process combined with Co-based liquid-phase extrusion strategy was adopted in this study. The densification temperature can be lowered to 1350 ℃, which is much lower than the solid-state sintering temperature (~2000 ℃) generally employed for high-entropy carbide ceramics. When sintered at 1550 ℃ and 30 MPa applied pressure, part of the Co-based liquid-phase was squeezed out of the graphite mold, such that only ~3.21 vol% of Co remained in the high-entropy ceramic. Compared to the Co-free solid-state sintered (Ti,Zr,Nb,Ta,Mo)C ceramics, prepared at 2000 ℃ and 35 MPa, the hardness was slightly decreased from 25.06±0.32 to 24.11±0.75 GPa, but the toughness was increased from 2.25±0.22 to 4.07±0.13 MPa·m1/2. This work provides a new strategy for low-temperature densification of high-entropy carbides with both high hardness and high toughness.}
}