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Single-source precursor derived high-entropy metal–carbide nanowires:Microstructure and growth evolution

作     者:Junhao Zhao Yulei Zhang Hui Chen Yanqin Fu Qing Miao Jiachen Meng Jiachen Li 

作者机构:Shaanxi Key Laboratory of Fiber Reinforced Light Composite MaterialsNorthwestern Polytechnical UniversityXi’an 710072China Henan Key Laboratory of High Performance Carbon Fiber Reinforced CompositesInstitute of Carbon Matrix CompositesHenan Academy of SciencesZhengzhou 450046China 

出 版 物:《Journal of Advanced Ceramics》 (先进陶瓷(英文))

年 卷 期:2023年第12卷第11期

页      面:2041-2052页

核心收录:

学科分类:0809[工学-电子科学与技术(可授工学、理学学位)] 08[工学] 

基  金:supported by the National Key R&D Program of China(Grant No.2021YFA0715803) the National Natural Science Foundation of China(Grant Nos.52293373 and 52130205) ND Basic Research Funds of Northwestern Polytechnical University(Grant No.G2022WD) 

主  题:(Ti_(0.2)Zr_(0.2)Hf_(0.2)Nb_(0.2)Ta_(0.2))C nanowires high-entropy metal carbides(HECs) (Ti,Zr,Hf,Nb,Ta)-containing precursors vapor–liquid–solid(VLS)mechanism 

摘      要:In recent years,high-entropy metal carbides(HECs)have attracted significant attention due to their exceptional physical and chemical *** combination of excellent performance exhibited by bulk HEC ceramics and distinctive geometric characteristics has paved the way for the emergence of one-dimensional(1D)HECs as novel materials with unique development ***,we successfully fabricated novel(Ti_(0.2)Zr_(0.2)Hf_(0.2)Nb_(0.2)Ta_(0.2))C nanowires derived via Fe-assisted single-sourced precursor *** to the synthesis of the nanowires,the composition and microstructure of(Ti,Zr,Hf,Nb,Ta)-containing precursor(PHECs)were analyzed,and divinylbenzene(DVB)was used to accelerate the conversion process of the precursor and contribute to the formation of HECs,which also provided a partial carbon source for the nanowire ***,multi-branched,single-branched,and single-branched bending nanowires were synthesized by adjusting the ratio of PHECs to *** obtained single-branched(Ti_(0.2)Zr_(0.2)Hf_(0.2)Nb_(0.2)Ta_(0.2))C nanowires possessed smooth surfaces with an average diameter of 130–150 nm and a length of several tens of micrometers,which were a single-crystal structure and typically grew along the[11¯1]***,the growth of the(Ti_(0.2)Zr_(0.2)Hf_(0.2)Nb_(0.2)Ta_(0.2))C nanowires was in agreement with top-type vapor–liquid–solid *** work not only successfully achieved the fabrication of HEC nanowires by a catalyst-assisted polymer pyrolysis,but also provided a comprehensive analysis of the factors affecting their yield and morphology,highlighting the potential application of these attractive nano-materials.

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