High-entropy metal carbide nanowires

被引：49
作者：
Ma, Mengdong [1 ,2 ]
Hu, Xiaofei [3 ]
Meng, Hong [1 ]
Zhao, Zhisheng [2 ]
Chang, Keke [3 ]
Chu, Yanhui [1 ]
机构：
[1] South China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510641, Peoples R China
[2] Yanshan Univ, Ctr High Pressure Sci CHiPS, State Key Lab Metastable Mat Sci & Technol, Qinhuangdao 066004, Peoples R China
[3] Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Key Lab Marine Mat & Related Technol, Zhejiang Key Lab Marine Mat & Protect Technol, Ningbo 315201, Peoples R China
来源：
CELL REPORTS PHYSICAL SCIENCE | 2022年 / 3卷 / 04期
基金：
中国博士后科学基金;
关键词：
THERMODYNAMIC ASSESSMENT; RAYLEIGH INSTABILITY; HYBRID STRUCTURES; SYSTEM; COMPOSITES;
D O I：
10.1016/j.xcrp.2022.100839
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The development of high-entropy ceramic nanomaterials has significant scientific and technological potential, yet studies on these materials are rare. Here, we successfully synthesize (Hf0.25Ta0.25Nb0.25Ti0.25)C high-entropy metal carbide (HEC-1) nanowires-a class of high-entropy ceramic nanomaterials-via a facile bamboo-based carbothermal method with an Fe-Ni catalyst. The growth of HEC-1 nanowires occurs through a classical vapor liquid-solid mechanism based on the solubility of metal, carbon, and HEC-1 in the Fe-Ni alloy. After high-temperature treatment, HEC-1 nanowires show good thermal stability without morphological evolution below 1,600?, while they evolve into "pearl necklace "'-like nanostructures or particles above 1,600? due to the Rayleigh instability mechanism. After high-pressure treatments, HEC-1 nanowires are broken into nanorods above 1 GPa, in which brittle fracture without any dislocations, slip bands, or amorphous shear bands is directly observed at nano and atomic scales.
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页数：15
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