Melting diamond in the diamond cell by laser-flash heating

IF 1.2 4区物理与天体物理 Q3 PHYSICS, MULTIDISCIPLINARY

High Pressure Research Pub Date : 2022-12-27 DOI:10.1080/08957959.2022.2160246

L. Yang, A. Karandikar, T. Shiell, B. A. Cook, S. Wong, M. Field, J. Bradby, B. Haberl, D. G. McCulloch, R. Boehler

引用次数: 3

Abstract

ABSTRACT The phase behavior of carbon at high pressure and the search for carbon structures denser than diamond has been explored for decades showing large discrepancies, with many fundamental questions remaining unresolved. Here we show evidence of melting above the graphite-diamond-liquid (GDL) triple point (∼13 GPa, 4000 K) up to 50 GPa on samples recovered from single flash-heating events using spectroscopic and electron microscopic methods. The results show that for all pressures, diamond melts below the triple point temperature contradicting previous studies, most of which predict a positive slope of the melting curve.

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用激光闪光加热在金刚石槽中熔化金刚石

摘要几十年来，人们一直在探索碳在高压下的相行为和寻找比金刚石更致密的碳结构，但发现了很大的差异，许多基本问题仍未解决。在这里，我们展示了使用光谱和电子显微镜方法从单次闪光加热事件中回收的样品在石墨-金刚石液体（GDL）三点（~13GPa，4000K）以上高达50GPa的温度下熔化的证据。结果表明，对于所有压力，金刚石在三点温度以下熔化，这与之前的研究相矛盾，其中大多数研究预测了熔化曲线的正斜率。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

High Pressure Research 物理-物理：综合

CiteScore

3.80

自引率

5.00%

发文量

审稿时长

2 months

期刊介绍： High Pressure Research is the leading journal for research in high pressure science and technology. The journal publishes original full-length papers and short research reports of new developments, as well as timely review articles. It provides an important forum for the presentation of experimental and theoretical advances in high pressure science in subjects such as: condensed matter physics and chemistry geophysics and planetary physics synthesis of new materials chemical kinetics under high pressure industrial applications shockwaves in condensed matter instrumentation and techniques the application of pressure to food / biomaterials Theoretical papers of exceptionally high quality are also accepted.