Melting diamond in the diamond cell by laser-flash heating

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

doi:10.1080/08957959.2022.2160246

Melting diamond in the diamond cell by laser-flash heating

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

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

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.

Original language	English
Pages (from-to)	1-14
Number of pages	14
Journal	High Pressure Research
Volume	43
Issue number	1
DOIs	https://doi.org/10.1080/08957959.2022.2160246
Publication status	Published - 2023

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10.1080/08957959.2022.2160246

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title = "Melting diamond in the diamond cell by laser-flash heating",

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.",

keywords = "Diamond cell, diamond melting, laser-heating",

author = "L. Yang and A. Karandikar and Shiell, {T. B.} and Cook, {B. A.} and S. Wong and Field, {M. R.} and Bradby, {J. E.} and B. Haberl and McCulloch, {D. G.} and R. Boehler",

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T1 - Melting diamond in the diamond cell by laser-flash heating

AU - Yang, L.

AU - Karandikar, A.

AU - Shiell, T. B.

AU - Cook, B. A.

AU - Wong, S.

AU - Field, M. R.

AU - Bradby, J. E.

AU - Haberl, B.

AU - McCulloch, D. G.

AU - Boehler, R.

PY - 2023

Y1 - 2023

N2 - 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.

AB - 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.

KW - Diamond cell

KW - diamond melting

KW - laser-heating

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DO - 10.1080/08957959.2022.2160246

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VL - 43

SP - 1

EP - 14

JO - High Pressure Research

JF - High Pressure Research

IS - 1

ER -

Melting diamond in the diamond cell by laser-flash heating

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