ATOMIC STRUCTURE OF BORON CARBIDE

Kolan Madhav Reddy*, Simanta Lahkar, Akihiko Hirata, Mingwei Chen

*この研究の対応する著者

研究成果: Chapter

1 被引用数 (Scopus)

抄録

Boron carbide is composed of only boron and carbon, two light solid elements. Due to the weak scattering power detection of light elements by using microscopes, the atomic structure of boron carbide, the third hardest naturally occurring material is unresolved and hotly debated. In this chapter we show the atomic structure of boron carbide by using stateof-the-art spherical abberation corrected scanning transmission electron microscopy combined with a newly developed annular bright field imaging mode. From the experiments, we found three different crosslinked linear chain structures i.e., C-B-C, C-V-C and C-C-C polytypes. The measurements from atomic images revealed presence of about 80-85% C-B-C cross-linked linear chains suggesting that this polytype unit is thermodynamically favorable in boron carbide ground state binary phase. The deviation from ideal C-B-C cross-linked linear chain structure may have been related to high temperature solid solubility.

本文言語English
ホスト出版物のタイトルBoron Carbide
ホスト出版物のサブタイトルStructure, Processing, Properties and Applications
出版社Nova Science Publishers, Inc.
ページ1-20
ページ数20
ISBN(電子版)9781536171228
ISBN(印刷版)9781536171211
出版ステータスPublished - 2020 1月 1
外部発表はい

ASJC Scopus subject areas

  • 工学(全般)
  • 材料科学(全般)

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