Journal
MATERIALS LETTERS
Volume 304, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.matlet.2021.130739
Keywords
RHEA; Composite materials; Mechanical properties; Microstructure
Funding
- National Natural Science Foundation of China [51932006, 51521001, 52001115]
- Major Program of the Specialized Technological Innovation of Hubei Province, China [2019AFA176]
- R&D projects in key areas of Guangdong Province, China [2019B121204001]
- [6141A02022255]
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A novel RHEA matrix MoNbW(TaC)0.9 composite with ultra-high compressive strength of 2.19 GPa at 1200 degrees C has been identified, showing great application prospects in the aerospace field. The composite has a eutectic-like microstructure composed of BCC phase and fine lamellar eutectoid structures.
In this letter, a novel RHEA matrix MoNbW(TaC)0.9 composite with ultra-high compressive strength of 2.19 GPa at 1200 degrees C have been identified after vacuum arc melting and annealing. The excellent high temperature strength and plasticity of MoNbW(TaC)x composites show great application prospects in the aerospace field. The MoNbW (TaC)x composites have eutectic-like microstructure composed of BCC phase and fine lamellar eutectoid structures. The fine lamellar eutectoid structures are composed of BCC phase and multi-component carbide FCC-MC phase rich in Nb and Ta. The MoNbW(TaC)0.9 composite with fully eutectic-like microstructure combines the advantages of second phase strengthening and grain refinement strengthening.
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