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Keywords = β-rhombohedral boron

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8 pages, 1910 KiB  
Article
Morphology and Growth Mechanism of β-Rhombohedral Boron and Pentagonal Twins in Cu Alloy
by Junqing Han, Wentao Yuan, Yihan Wen, Zuoshan Wei, Tong Gao, Yuying Wu and Xiangfa Liu
Crystals 2022, 12(11), 1516; https://doi.org/10.3390/cryst12111516 - 25 Oct 2022
Viewed by 2583
Abstract
In this work, boron particles with β-rhombohedral structure were prepared in Cu-4B alloy. The morphology and growth mechanism of β-B and pentagonal twins were analyzed. Results show that boron crystals possessed an approximate octahedral structure which consisted of two planes belonging to {001} [...] Read more.
In this work, boron particles with β-rhombohedral structure were prepared in Cu-4B alloy. The morphology and growth mechanism of β-B and pentagonal twins were analyzed. Results show that boron crystals possessed an approximate octahedral structure which consisted of two planes belonging to {001} facet and a rhombohedron formed by {101} planes. The morphology of the boron crystal was determined by the position and size of {001} planes. During growth, parts of boron crystal formed twins to reduce surface energy. Five particular single crystals can shape a pentagonal twin. The morphological distinction between pentagonal twins mainly came from the difference in morphology of single crystal. When the {001} exposed planes were large and showed a hexagonal shape, the boron crystal often formed parallel groupings and polysynthetic twins to reduce surface energy. Full article
(This article belongs to the Special Issue Intermetallic Compound (Volume II))
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