Journal
MATERIALS LETTERS
Volume 268, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.matlet.2020.127629
Keywords
Intermetallic alloys and compounds; Sintering; Microstructure; Crystal structure
Funding
- National Natural Science Foundation of China [51871012, 50871012]
- Open Fund of National Joint Engineering Research Center for Abrasion Control and Molding of Metal Materials [HKDNM201805]
- Fundamental Research Funds for the Central Universities [FRF-BR-17-031A]
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A novel of MSi2 high entropy silicide, (Mo0.2W0.2Cr0.2Ta0.2Nb0.2)Si-2, was successfully synthesized by insitu reactive synthesis with spark plasma sintering. The microstructure, sintering behavior and mechanical properties of this product were investigated in this study. X-ray diffraction confirmed that the main phase is C40 hexagonal structure. The distribution of the existent elements is basically uniform at the micrometer scale. The (Mo0.2W0.2Cr0.2Ta0.2Nb0.2)Si-2 exhibits higher Vickers hardness and fracture toughness than the average by rule of mixture due to the high entropy effect. These studies will significantly promote the improvement of low temperature toughness and high temperature strength of MoSi2 for aero-engine. (C) 2020 Elsevier B.V. All rights reserved.
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