期刊
RESULTS IN PHYSICS
卷 16, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.rinp.2019.102841
关键词
Amorphous boron; Electron beam irradiation; Crystallization; Boron nanospheres
资金
- National Natural Science Foundation of China [51001065, 51571133]
- Natural Science Foundation of Shandong Province [ZR201702200041]
- Key Research and Development Project in Shandong Province [2019GGX102013]
- Young Scholars Program of Shandong University (YSPSDU)
In this work, amorphous coralloid boron was successfully prepared in Cu-B-Mg alloy by adding magnesium and increasing cooling rate. Coralloid amorphous boron crystallized under electron beam irradiation and crystalline boron nanospheres were formed on amorphous substrate. The boron nanospheres possess a particle size between 5 and 20 nm. Boron nanospheres mainly exist as alpha-B structure. During the formation of boron sphere, a spherical black region was first formed in the amorphous boron substrate, and then the black region gradually crystallized and finally formed a complete boron sphere. Moreover, boron nanospheres were unstable in the initial stage and twin structure can be observed in this stage. As the electron beam irradiation time increased, the substrate gradually shrinked and the boron spheres gradually detached from the substrate.
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