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Abstract

A sub-second laser heating technique has been successfully applied for graphite melting under controlled isobaric conditions. During the applied pulses, relatively large amounts of graphite were melted and subsequently solidified under good stability conditions of the liquid mass. The solid-liquid-vapour (SLV) triple point was determined. From metallographic analysis of the quenched liquid, the expansion upon melting could be estimated. A mathematical model was then applied to deduce the thermal conductivity of liquid carbon. Both experimental observations and calculation results indicate a non-metallic nature of liquid carbon in the pressure range of 110 bar to 2500 bar. Finally, an analysis of the melting line T(m)(p) based on Simon's empirical equation of state confirms the self-consistency of all results obtained.

Additional information

Authors: MUSELLA M, JRC Karlsruhe (DE);RONCH C, JRC Karlsruhe (DE);BRYKIN M, Russian Academy of Sciences, Moscow (RU);SHEINDLIN M, Russian Academy of Sciences, Moscow (RU)
Bibliographic Reference: Article: Journal of Applied Physics (1998)
Record Number: 199811185 / Last updated on: 1998-10-09
Category: PUBLICATION
Original language: en
Available languages: en