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Mechanical Properties of Transition-Metal Osmium under High Pressure
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Xiao-Mei LIU1, Yong-Cheng LIANG2, Qiu-Hong SONG2
Chinese Journal of High Pressure Physics | 2008, 22(3) : 253 - 258
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Chinese Journal of High Pressure Physics | 2008, 22(3): 253-258
Mechanical Properties of Transition-Metal Osmium under High Pressure
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Xiao-Mei LIU1, Yong-Cheng LIANG2, Qiu-Hong SONG2
Affiliations
  • 1.College of Fundamental Studies, Shanghai University of Engineering Science, Shanghai 201620, China
  • 2.College of Engineering Science and Technology, Shanghai Fisheries University, Shanghai 200090, China
Published: 2008-09-05
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The equation of states, elastic constants and other mechanical properties of transition-metal osmium under high-pressure are studied by the first-principles plane-wave pseudopotential calculations based on the density functional theory (DFT). The calculated results indicate that osmium has high bulk modulus B0 (423.9 GPa) and large elastic constants C11 (771.3 GPa) and C33 (852.0 GPa) comparable to diamond (B0=452.8 GPa, C11=C33=1 082.9 GPa), so it is an ultralow-compressible material. However, its elastic constant C44 (269.8 GPa) and shear modulus G (276.8 GPa), which indirectly measure hardness, are half of those of diamond (C44=586.9 GPa, G=537.5 GPa). Because of its pure metallic bonds, it may not be superhard material. The microscopic mechanism of high bulk modulus and low hardness can be understood from the analysis for electronic structures, and it helps to design and synthesize new superhard material.

transition-metal osmium  /  mechanical properties  /  high-pressure  /  first-principles calculations
刘小妹, 梁拥成, 宋秋红. 过渡金属锇在高压下的力学特性. 高压物理学报, 2008 , 22 (3) : 253 -258 .
Xiao-Mei LIU, Yong-Cheng LIANG, Qiu-Hong SONG. Mechanical Properties of Transition-Metal Osmium under High Pressure[J]. Chinese Journal of High Pressure Physics, 2008 , 22 (3) : 253 -258 .
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Article Info
  • Receive Date：2007-10-10
  • Online Date：2026-10-30
  • Published：2008-09-05
Article Data
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History
  • Received：2007-10-10
  • Revised：2008-01-09
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Affiliations
    1.College of Fundamental Studies, Shanghai University of Engineering Science, Shanghai 201620, China
    2.College of Engineering Science and Technology, Shanghai Fisheries University, Shanghai 200090, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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