Compression behavior of NbC under nonhydrostatic conditions to 57 GPa

被引:12
|
作者
Liermann, H. P.
Singh, A. K.
Somayazulu, M.
Saxena, S. K.
机构
[1] Carnegie Inst Sci, Adv Photon Source, HPCAT, Argonne, IL 60439 USA
[2] Carnegie Inst Sci, Geophys Lab, Argonne, IL 60439 USA
[3] Natl Aeronaut Lab, Div Mat Sci, Bangalore 560017, Karnataka, India
[4] Carnegie Inst Sci, Geophys Lab, Washington, DC 20005 USA
[5] Florida Int Univ, CeSMEC, Miami, FL 33199 USA
基金
美国国家卫生研究院; 美国国家科学基金会;
关键词
niobium carbide; compressibility; elastic properties; bulk modulus;
D O I
10.1016/j.ijrmhm.2006.12.002
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The analysis of the diffraction data under nonhydrostatic stress condition created in a diamond anvil cell suggests that the compressive strength of NbC crystallites is at least 24 +/- 4 GPa at a confining pressure of 57 +/- 0.5 GPa. When using Al as a pressure transmitting medium in the diamond anvil cell pressure conditions become nearly hydrostatic. The bulk modulus derived from the compression data under quasi-hydrostatic pressure condition gives K-0 = 274 +/- 3 GPa when fixing K-0(1) = 4. This value agrees well with the value obtained from the first-principles numerical calculations. (C) 2007 Elsevier Ltd. All riahts reserved.
引用
收藏
页码:386 / 391
页数:6
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