P-V-T equation of state of boron carbide.
P-V-T equation of state of boron carbide.
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DOI:
10.1098/rsta.2022.0331
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发表时间:
2023-10-16
期刊:
影响因子:
5
通讯作者:
Hemley, Russell J.
中科院分区:
文献类型:
--
作者:
Somayazulu, Maddury;Ahart, Muhtar;Meng, Yue;Ciezak, Jennifer;Velisavlevic, Nenad;Hemley, Russell J.
We report the P-V-T equation of state measurements of B4C to 50 GPa and approximately 2500 K in laser-heated diamond anvil cells. We obtain an ambient temperature, third-order Birch–Murnaghan fit to the P-V data that yields a bulk modulus K0 of 221(2) GPa and derivative, (dK/dP)0 of 3.3(1). These were used in fits with both a Mie–Grüneisen–Debye model and a temperature-dependent, Birch–Murnaghan equation of state that includes thermal pressure estimated by thermal expansion (α) and a temperature-dependent bulk modulus (dK0/dT). The ambient pressure thermal expansion coefficient (α0 + α1T), Grüneisen γ(V) = γ0(V/V0)q and volume-dependent Debye temperature, were used as input parameters for these fits and found to be sufficient to describe the data in the whole P-T range of this study. This article is part of the theme issue ‘Exploring the length scales, timescales and chemistry of challenging materials (Part 1)’.
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