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Synthesis and Characterization of High-Purity, High-Entropy Diboride Ceramic Powders by a Liquid Phase Method.
- Source :
- Materials (1996-1944); Dec2023, Vol. 16 Issue 23, p7431, 11p
- Publication Year :
- 2023
-
Abstract
- A nano-dual-phase powder with ultra-fine grain size was synthesized by the liquid precursor method at 1200 °C. A series of single-phase high-entropy ceramic powders ((Ti, Zr, Hf, Nb)B<subscript>2</subscript>, (Ti, Zr, Hf, Nb, Ta)B<subscript>2</subscript>, (Ti, Zr, Hf, Nb, Mo)B<subscript>2</subscript>, (Ti, Zr, Hf, Nb, Ta, Mo)B<subscript>2</subscript>) with high purity (C content less than 0.9 wt% and O content less than 0.7 wt%) and ultrafine (average grain sizes of 340–570 nm) were successfully synthesized at 1800 °C. The sample of (TiZrHfNbTa)B<subscript>2</subscript> exhibited a hexagonal close-packed (HCP) structure, and the metal elements were uniformly distributed at the nanoscale, microscale, and macroscale. This method did not apply to the preparation of all high-entropy ceramic powders and was unfavorable for the formation of single-phase high-entropy borides when the size difference factor exceeded 3.9%. The present work provides a guide for the development of ceramic-based composites through precursor impregnation pyrolysis. [ABSTRACT FROM AUTHOR]
- Subjects :
- CERAMIC powders
LIQUIDS
GRAIN size
ALLOY powders
POWDERS
PYROLYSIS
BORIDES
TANTALUM
Subjects
Details
- Language :
- English
- ISSN :
- 19961944
- Volume :
- 16
- Issue :
- 23
- Database :
- Complementary Index
- Journal :
- Materials (1996-1944)
- Publication Type :
- Academic Journal
- Accession number :
- 174112425
- Full Text :
- https://doi.org/10.3390/ma16237431