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 | |
【 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.
【 授权许可】
Free
【 预 览 】
Files | Size | Format | View |
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10_1016_j_scriptamat_2017_05_030.pdf | 344KB | download |