Quenching of Liquid Carbon on the Surface of a Diamond Substrate

被引：1

作者：

Dozhdikov, V. S. ^{[1
]}

Basharin, A. Yu. ^{[1
]}

Levashov, P. R. ^{[1
]}

机构：

[1] Russian Acad Sci, Joint Inst High Temp, Moscow, Russia

来源：

HIGH TEMPERATURE | 2022年 / 60卷 / SUPPL 2期

关键词：

MELTING-POINT; GRAPHITE;

D O I：

10.1134/S0018151X21050047

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Amorphous carbon is obtained for the first time by quenching liquid carbon. The implementation of the laser melting of graphite flakes pressed onto a diamond substrate makes it possible to implement a scheme for a drop of liquid carbon to fall onto cold diamond. Diamond, due to its uniquely high thermal conductivity, ensures rapid cooling of the resulting melt. The quenching rate is one of the most important para-meters affecting the formation and properties of amorphous materials. To calculate the real values of the quenching rate obtained in the experiment, a nonstationary one-dimensional heat conduction equation was solved taking into account the geometric dimensions of the experimental samples. The distribution of liquid carbon quenching rates is determined in the range 10(14)-10(12) K/s depending on the distance from the substrate. The research results showed that diamond can serve as a unique quenching medium for molten liquid carbon with an extremely high temperature of 5000 to 6000 K.

引用

页码：S248 / S254

页数：7

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