Equation of state of bcc-Mo by static volume compression to 410 GPa

被引：22

作者：

Akahama, Yuichi ^{[1
]}

Hirao, Naohisa ^{[2
]}

Ohishi, Yasuo ^{[2
]}

Singh, Anil K. ^{[3
]}

机构：

[1] Univ Hyogo, Grad Sch Mat Sci, Kamigori, Hyogo 6781297, Japan

[2] Japan Synchrotron Radiat Res Inst JASRI, Mikazuki, Hyogo 6795198, Japan

[3] Natl Aerosp Labs, Div Mat Sci, Bangalore 560017, Karnataka, India

来源：

JOURNAL OF APPLIED PHYSICS | 2014年 / 116卷 / 22期

基金：

日本学术振兴会;

关键词：

X-RAY-DIFFRACTION; STRUCTURAL PHASE-TRANSITIONS; SHOCK COMPRESSION; LATTICE STRAINS; PRESSURE; MOLYBDENUM; GOLD; CR; VELOCITIES; PLATINUM;

D O I：

10.1063/1.4903940

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Unit cell volumes of Mo and Pt have been measured simultaneously to approximate to 400GPa by x-ray powder diffraction using a diamond anvil cell and synchrotron radiation source. The body-centered cubic (bcc) phase of Mo was found to be stable up to 410 GPa. The equation of state (EOS) of bcc-Mo was determined on the basis of Pt pressure scale. A fit of Vinet EOS to the volume compression data gave K-0 = 262.3(4.6) GPa, K-0' = 4.55(16) with one atmosphere atomic volume V-0 = 31.155(24) A(3). The EOS was in good agreement with the previous ultrasonic data within pressure difference of 2.5%-3.3% in the multimegabar range, though the EOS of Mo proposed from a shock compression experiment gave lower pressure by 7.2%-11.3% than the present EOS. The agreement would suggest that the Pt pressure scale provides an accurate pressure value in an ultra-high pressure range. (C) 2014 AIP Publishing LLC.

引用

页数：5

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