Ultra-incompressible High-Entropy Diborides

Zhang，Xiaoliang1; Li，Weiwei1; Tian，Hua1; Liu，Junxiu1; Li，Cong1; Dong，Hongliang1,2; Chen，Jian1,3; Song，Meng1; Chen，Bin1; Sheng，Hongwei1; Wang，Shanmin3; Zhang，Dongzhou4; Zhang，Hengzhong1

2021-04-01

10.1021/acs.jpclett.1c00399

The journal of physical chemistry letters   影响因子和分区

1948-7185

Transition metal borides are commonly hard and incompressible, offering great opportunities for advanced applications under extreme conditions. Recent studies show that the hardness of high-entropy borides may exceed that of their constituent simple borides due to the "cocktail effect". However, how high-entropy borides deform elastically remains largely unknown. Here, we show that two newly synthesized high-entropy diborides are ultra-incompressible, attaining ∼90% of the incompressibility of single-crystalline diamond and exhibiting a 50-60% enhancement over the density functional theory predictions. This unusual behavior is attributed to a Hall-Petch-like effect resulting from nanosizing under high pressure, which increases the bulk moduli through dynamic dislocation interactions and creation of stacking faults. The exceptionally low compressibility, together with their high phase stabilities, high hardness, and high electric conductance, renders them promising candidates for electromechanics and microelectronic devices that demand strong resistance to environmental impacts, in addition to traditional grinding and abrading.

SCI ; EI

英语

NI论文

其他

WOS:000636950500012

20211810303419

Density functional theory ; Entropy ; Environmental impact ; Hardness ; High pressure effects ; Microelectronics ; Transition metals

Environmental Impact and Protection:454.2 ; Metallurgy and Metallography:531 ; Thermodynamics:641.1 ; Inorganic Compounds:804.2 ; Probability Theory:922.1 ; Materials Science:951

2-s2.0-85103683594

Scopus

1.Center for High Pressure Science and Technology Advanced Research,201203,China
2.State Key Laboratory of High Performance Ceramics and Superfine Microstructure,Shanghai Institute of Ceramics,Chinese Academy of Sciences,201899,China
3.Department of Physics,Southern University of Science and Technology,Shenzhen,518055,China
4.Partnership for Extreme Crystallography Program,University of Hawaii at Manoa,Honolulu,96822,United States

Zhang，Xiaoliang,Li，Weiwei,Tian，Hua,et al. Ultra-incompressible High-Entropy Diborides[J]. The journal of physical chemistry letters,2021,12(12):3106-3113.

Zhang，Xiaoliang.,Li，Weiwei.,Tian，Hua.,Liu，Junxiu.,Li，Cong.,...&Zhang，Hengzhong.(2021).Ultra-incompressible High-Entropy Diborides.The journal of physical chemistry letters,12(12),3106-3113.

Zhang，Xiaoliang,et al."Ultra-incompressible High-Entropy Diborides".The journal of physical chemistry letters 12.12(2021):3106-3113.