Compressibility of Nb2AsC to 41 GPa -: art. no. 111904

被引：64

作者：

Kumar, RS ^{[1
]}

Rekhi, S

Cornelius, AL

Barsoum, MW

机构：

[1] Univ Nevada, Dept Phys, Las Vegas, NV 89154 USA

[2] Univ Nevada, HiPSEC, Las Vegas, NV 89154 USA

[3] Harvard Univ, Cambridge, MA 02138 USA

[4] MIT, EAPS, Mineral Phys Lab, Cambridge, MA 02139 USA

[5] Drexel Univ, Dept Mat Sci & Engn, Philadelphia, PA 19104 USA

来源：

APPLIED PHYSICS LETTERS | 2005年 / 86卷 / 11期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1063/1.1884261

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Room temperature synchrotron x-ray diffraction experiments were performed on the layered hexagonal ternary carbide Nb2AsC in a diamond anvil cell to a pressure of 41 GPa. The structure is stable with no phase transitions observed in this pressure range. The bulk modulus is 224 +/- 2 GPa, with a pressure derivative of 4; the former is the highest bulk modulus for a M(n+1)AX(n) (MAX) phase, including Ti3SiC2, measured to date. Nb2AsC is also the first MAX phase for which the compressibility along the a direction is higher than along the c direction; in other words, the c/a ratio increases strongly with applied pressure. (C) 2005 American Institute of Physics.

引用

页码：1 / 3

页数：3

共 19 条

[1] FP-LAPW investigations of electronic structure and bonding mechanism of NbC and NbN compounds [J].