高压物理学报

在200 GPa冲击压强下铁是否会发生固-固相变？

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黄海军 ¹^,² , 蔡灵仓 ² , 田旭 ¹

高压物理学报 | 2007,21(2): 205-209

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高压物理学报 | 2007 , 21 (2) : 205 -209

在200 GPa冲击压强下铁是否会发生固-固相变？

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黄海军¹^,², 蔡灵仓², 田旭¹

作者信息

^1.武汉理工大学理学院，湖北武汉　430070

^2.中国工程物理研究院流体物理研究所冲击波物理与爆轰物理实验室，四川绵阳　621900

作者简介:

黄海军（1976—），男，博士，主要从事高压状态方程研究. E-mail：hhjgyp_cn@163.com

Does There Exist a Solid-Solid Transformation in Shocked Iron at around 200 GPa?

Hai-Jun HUANG¹^,², Ling-Cang CAI², Xu TIAN¹

Affiliations

^1.College of Science, Wuhan University of Technology, Wuhan 430070, China

^2.Laboratory for Shock Wave and Detonation Physics Research, Institute of Fluid Physics, CAEP, Mianyang 621900, China

出版时间: 2007-06-05

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摘要

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根据Grüneisen物态方程、Hugoniot内能守恒方程和最新发表的铁的热物理参数，计算了ε-（hcp）铁和液态铁的理论Hugoniot曲线。计算的Hugoniot曲线与最新修正的铁的实验数据[J Appl Phys，2000，88:5496]在总体上符合很好，并且可以细分为两个部分：在约低于200 GPa的压强区，用ε-铁模型的计算结果与实验结果符合很好；在约高于260 GPa的压强区，用液态铁模型的计算结果与实验数据也符合得比较好；对介于200~260 GPa之间的压强区，则归属于由ε-铁向液态铁转变的混合相区。这意味着铁的Hugoniot曲线在约200 GPa处出现的微小偏折是由固-液相变引起的，从而否定了Brown [Geophy Res Lett，2001，28：4339]提出的它是一次由ε-铁向另一个未知结构的某个固相铁的相转变的见解。

关键词

铁 / 高压相变 / 状态方程

Abstract

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A theoretical Hugoniot curve of iron has been calculated based on Grüneisen equation of state and internal energy conservation consideration, using a set of optimized or thermophysical parameters and both ε- and liquid-iron models. This determined Hugoniot curve is well in accord with the revised Hugoniot data [J Appl Phys, 2000, 88: 5496] on the whole, and could be further divided into two parts. The first one can well describe the revised data below ~200 GPa with ε-phase model, while the second can approximately replicate the revised data above ~260 GPa with liquid-phase model. It is thus convinced that the range between ~200 GPa and ~260 GPa should be in solid/liquid mixed state, i.e, a small kink appearing on the revised Hugoniot at ~200 GPa is due to a solid-liquid transition, rather than a solid-solid transition at ~200 GPa that was inferred from Brown's analysis [Geophys Res Lett, 2001, 28: 4339].

Key words

iron / high pressure phase transition / equation of state

引用本文

黄海军, 蔡灵仓, 田旭. 在200 GPa冲击压强下铁是否会发生固-固相变？. 高压物理学报, 2007 , 21 (2) : 205 -209 .

Hai-Jun HUANG, Ling-Cang CAI, Xu TIAN. Does There Exist a Solid-Solid Transformation in Shocked Iron at around 200 GPa?[J]. Chinese Journal of High Pressure Physics, 2007 , 21 (2) : 205 -209 .

基金

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国家自然科学基金重大项目(10299040)
面上项目(40604007)

参考文献

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2007年第21卷第2期

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接收时间：2007-02-15
首发时间：2026-11-01
出版时间：2007-06-05

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收稿日期：2007-02-15
修回日期：2007-03-30

基金

国家自然科学基金重大项目(10299040)

面上项目(40604007)

作者信息

^1.武汉理工大学理学院，湖北武汉　430070

^2.中国工程物理研究院流体物理研究所冲击波物理与爆轰物理实验室，四川绵阳　621900

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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
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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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