Article
Thermophysical Properties of Materials
2004. V. 42. № 1. P. 60–67
Basharin A.Yu., Brykin M.V., Marin M.Yu., Pakhomov I.S., Sitnikov S.F.
Methods of increasing the measurement accuracy during the experimental determination of the melting point of graphite
Annotation
The experimental procedure involving pulsed laser heating is realized, which enables one to investigate phase transformations in graphite and eliminates the homogeneous condensation of carbon vapor over a sample. Data are obtained on the melting point of graphite and the temperature of crystallization of liquid carbon at a pressure of 15 MPa. The absence of a difference between the melting point of graphite at a heating rate of 100 MK/s and the temperature of crystallization of liquid carbon at the cooling rate of the melt bath of 1.6 MK/s is revealed, which is indicative of the quasi-equilibrium of the melting process. In view of this, the temperature data are averaged by a unified value of 4800±100 K. It is shown that, during the crystallization of carbon melt, highly ordered graphite with crystallites up to 250μm in size is formed in a liquid film 5μm thick on a graphite substrate.
Article reference:
Basharin A.Yu., Brykin M.V., Marin M.Yu., Pakhomov I.S., Sitnikov S.F. Methods of increasing the measurement accuracy during the experimental determination of the melting point of graphite, High Temp., 2004. V. 42. № 1. P. 60
Basharin A.Yu., Brykin M.V., Marin M.Yu., Pakhomov I.S., Sitnikov S.F. Methods of increasing the measurement accuracy during the experimental determination of the melting point of graphite, High Temp., 2004. V. 42. № 1. P. 60