期刊论文详细信息
SCRIPTA MATERIALIA 卷:138
Evaluating boron-carbide constituents with simulated Raman spectra
Article
Kunka, Cody1  Awasthi, Amnaya1  Subhash, Ghatu1 
[1] Univ Florida, Gainesville, FL 32611 USA
关键词: Boron carbide;    Raman spectroscopy;    Polymorphism;    Density functional theory;   
DOI  :  10.1016/j.scriptamat.2017.05.030
来源: Elsevier
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【 摘 要 】

Boron carbide exhibits extraordinary mechanical, thermal, and chemical properties but also has a complex structure due to extensive polymorphism. In particular, each fabricated sample of boron carbide likely comprises a collection of crystal structures mixed at the nanoscale. Development of methods to quantify these polymorphic variants would facilitate understanding and tailoring of properties. Hence, the current investigation provides a methodology to approximate the distribution of Raman-active constituents through comparison of an experimental Raman scan with a superposition of simulated Raman spectra. For boron carbide, the results indicate that hot pressing yields a different distribution of crystal structures than spark-plasma sintering. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

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