高圧力の科学と技術
Online ISSN : 1348-1940
Print ISSN : 0917-639X
ISSN-L : 0917-639X
特集:高圧メルトの実験最前線
内部抵抗加熱式ダイヤモンドアンビルセルを用いた鉄融点の決定
新名 良介廣瀬 敬大石 泰生
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2019 年 29 巻 2 号 p. 113-120

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The Earth's core is mainly composed of iron. Since liquid outer core coexists with solid at the inner core boundary (ICB), the melting temperature of iron provides a key constraint on the temperature of the core. In this article, we will introduce our recent progress on the experimental approach to determine the melting temperature of iron at high-pressure by using internal-resistance-heated diamond-anvil cell. We determined the melting temperature of pure iron up to 290 GPa, for the first time above 200 GPa by static compression experiments. A small extrapolation of the present experimental results yields a melting point of 5,500±220 K at the ICB.

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© 2019 日本高圧力学会
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