Thermoelastic properties of ReB2 at high pressures and temperatures and comparison with Pt, Os, and Re

被引：8

作者：

Kavner, Abby ^{[1
]}

Armentrout, Matthew M. ^{[1
]}

Rainey, Emma S. G. ^{[1
]}

Xie, Miao ^{[2
,3
]}

Weaver, Beth E. ^{[2
,3
]}

Tolbert, Sarah H. ^{[2
,3
]}

Kaner, Richard B. ^{[2
,3
]}

机构：

[1] Univ Calif Los Angeles, Dept Earth & Space Sci, Los Angeles, CA 90095 USA

[2] Univ Calif Los Angeles, Dept Chem & Biochem, Los Angeles, CA 90095 USA

[3] Univ Calif Los Angeles, Calif NanoSyst Inst, Los Angeles, CA 90095 USA

来源：

JOURNAL OF APPLIED PHYSICS | 2011年 / 110卷 / 09期

基金：

美国国家科学基金会;

关键词：

SUPERHARD RHENIUM DIBORIDE; DIAMOND-ANVIL CELLS; DIFFRACTION; SYSTEM;

D O I：

10.1063/1.3657776

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have measured the phase stability and thermoelastic equation of state of ultrahard rhenium diboride at pressures up to 30 GPa and temperatures up to 2500K using a laser heated diamond anvil cell in conjunction with synchrotron X-ray diffraction. ReB2 is shown to be stable throughout this pressure and temperature region. The ratio of the c-axis to the a-axis provides a monitor of the annealing of plastic stresses during compression. We show that ReB2 has a small thermal anisotropy but a large mechanical anisotropy. Combining this new data set with previously existing results from a large volume press yields a thermoelastic equation of state with a Gruneisen parameter of 2.4 (0.08) and a q of 2.7. A comparison of ReB2 with other high electron density incompressible metals-Os, Re, and Pt-shows that ReB2 has the lowest thermal pressure and the highest bulk modulus. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3657776]

引用

页数：5

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