Transformation dynamics of a carbon particle on a quartz substrate in a laser field

Abstract

This paper presents the results of computational–experimental studies of the laser heating of carbon (graphite) particles having a size of about 500 μm, located on a quartz substrate in inert nitrogen and argon media in the intensity range of laser radiation from 0.35 to 3.5  kW/cm2. The temperature of the particles is experimentally measured in the field where the laser radiation acts. It is shown that heating the carbon particles damages the surface of the quartz substrate in virtually the entire zone of the laser spot, with the formation of a crater whose center coincides with the center of the particle. The LOGOS software package, developed at the Russian Federal Nuclear Center—All-Russia Scientific Research Institute of Experimental Physics, is used to numerically model the process by which the laser radiation interacts with the carbon (graphite) particle lying on the quartz substrate. The results indicate that a chemical reaction occurs between the carbon and the quartz with possible formation of a layer of silicon carbide on the substrate surface.