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High-entropy M2AlC-MC (M=Ti, Zr, Hf, Nb, Ta) composite: Synthesis and microstructures.
- Source :
-
Scripta Materialia . Jul2020, Vol. 183, p33-38. 6p. - Publication Year :
- 2020
-
Abstract
- A high-entropy M 2 AlC-MC (M=Ti, Zr, Hf, Nb, Ta) composite was produced by reactive hot pressing using Ti, Zr, Hf, Nb, Ta, Al, and graphite as raw materials. Successful solution of the five transition metals in both hexagonal M 2 AlC and cubic MC was confirmed by XRD, SEM, atom-resolved STEM and EDS elemental analyses. The high-entropy M 2 AlC shows larger delocalization of atoms and higher lattice strain than the high-entropy MC along with considerable amount of Al vacancies. The formation mechanism of the high-entropy composite has been discussed. The Vickers hardness of the composite is measured to be 11.1 ± 1.1 GPa. Image, graphical abstract [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 13596462
- Volume :
- 183
- Database :
- Academic Search Index
- Journal :
- Scripta Materialia
- Publication Type :
- Academic Journal
- Accession number :
- 142766114
- Full Text :
- https://doi.org/10.1016/j.scriptamat.2020.03.015