Autor: |
Yipeng Zhao, Hongwei Li, Guoqing Chen, Yakun Wang, Kang Wang, Xuesong Fu, Wenlong Zhou |
Jazyk: |
angličtina |
Rok vydání: |
2023 |
Předmět: |
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Zdroj: |
Journal of Materials Research and Technology, Vol 22, Iss , Pp 3108-3114 (2023) |
Druh dokumentu: |
article |
ISSN: |
2238-7854 |
DOI: |
10.1016/j.jmrt.2022.12.134 |
Popis: |
A two-step sintering experiment of (MgCoNiCuZn)O high entropy oxide was performed to lower the flash onset temperature and shorten the process time. The flash onset temperature was efficiently minimized by regulating the first step heating process due to the variation of the conductivity and density of the compacts. The lowest onset temperature was only 307 °C at a 300 °C first step sintering. Subsequently, the as-sintered material with mainly rock-salt structure can be obtained in just 20 s soaking time after the field-assisted flash sintering procedure. The unusual densification was mainly caused by the higher configuration entropy and significant temperature gradients resulted from the preferential Joule heating of grain boundaries. This novel two-step sintering method would promote the rapid synthesize of high entropy oxides. |
Databáze: |
Directory of Open Access Journals |
Externí odkaz: |
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