期刊
CERAMICS INTERNATIONAL
卷 47, 期 12, 页码 16882-16890出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2021.02.264
关键词
Spark plasma sintering; Carbides; Mechanical properties; Modulus of elasticity; Grain size
资金
- National Natural Science Foundation of China [11905194]
- China National Science and Technology Major Special Project Research on Accident Tolerant Fuels Key Technologies [2015ZX06004001]
The study found that high-entropy compositions lead to higher mechanical properties in metal carbides. However, the variations in hardness, strength, toughness, and modulus of carbide solid solutions show different trends under different compositions.
Equiatomic multicomponent transition metal carbides containing different metal element numbers and carbide components were prepared from monocarbides by spark plasma sintering. The compositional effect on their mechanical properties were investigated in detail. Results indicate that all solid solutions exhibit higher hardness, strength, and modulus values than those obtained from rule of mixture, and it is prone to obtain higher mechanical properties in high-entropy compositions. Nevertheless, the variations of hardness, strength, toughness, and modulus show diverse trends upon the change of composition in carbide solid solutions. By comparison and analysis, it was concluded that entropy-related solid solution effect is a crucial parameter influencing the mechanical properties of metal carbides, however, other parameters such as microstructure, type of base monocarbides, phase purity are also negligible parameters which can have big influence on the overall mechanical properties.
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