3 years ago

Structural Stability of Boron Carbide under Pressure Proven by Spectroscopic Studies up to 73 GPa

Structural Stability of Boron Carbide under Pressure Proven by Spectroscopic Studies up to 73 GPa
Yves-Laurent Mathis, Leonid Dubrovinsky, Biliana Gasharova, Irina Chuvashova, Natalia Dubrovinskaia
Being a material of choice for lightweight armor applications, boron carbide has been intensively studied. Its behavior under pressure was investigated using both theoretical and experimental methods, such as powder X-ray diffraction and vibrational spectroscopy. As there is a discrepancy in experimental observations, in the presented work we studied vibrational properties of commercially available, “nearly stoichiometric” B4C using IR and Raman spectroscopy up to 73 GPa. No phase transitions were found in the entire pressure range. Our results are at odds with the recent report of a phase transition in B4.3C at about 40 GPa.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/zaac.201700243

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