Abstract
The method of generation and selection of small nanoparticles in the airflow is considered in this paper. To melt the material (stainless steel), a concentrated energy flow – a pulsed solid‐state laser beam – was used. Using the Mossbauer spectroscopy method, the particle sizes and their chemical composition at various distances from the melting place were determined. The influence of parameters of the laser beam power and the airflow on the size of particles and their chemical composition was investigated.
Highlights
Production of micro dispersive material or nanoparticles is a technically complicated and economically expensive process
The idea is based on the fact that particles of a desirable size and chemical composition can be generated from the laser cutting erosion products in the airflow
It is known that material destruction under the action of the laser beam occurs at 2000-3000K
Summary
Production of micro dispersive material or nanoparticles is a technically complicated and economically expensive process. The aim of this work is to consider and propose a method of production and selection of small particles of stainless steel using laser beam power. The idea is based on the fact that particles of a desirable size and chemical composition can be generated from the laser cutting erosion products in the airflow. The laser beam is used as the concentrated energy source that destroys the material, and the airflow activates the erosion process and particle oxidation. The synthesized particles possess properties of magnetites or supermagnetites. By admixing the hydraulic liquids with particles, it is possible to change the viscosity of these liquids by a remote method. Magnetic liquids are successfully used in the production of dampers of powerful vehicles and elsewhere
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