EXPERIMENTAL INVESTIGATION OF THE HIGH-RATE INTERACTION OF A CLOUD OF MICROPARTICLES WITH A METAL WITH THE USE OF A RAIL ACCELERATOR

A new electrodynamic method of deposition of microparticles of a solid material (tungsten carbide) on the surface of a steel target is considered. A tungsten carbide powder enclosed in a plastic container was accelerated with the use of a rail accelerator, and a "plasma piston" was used as a current-carrying pusher. A signifi cant infl uence of the attendant gasdynamic processes on the fl ow of the indicated particles, moving with a velocity of about 1400 m/s, is demonstrated. It is shown with the use of the electron-microscopy and nanoindentation methods that the microparticles deposited on the surface of a steel target substantially infl uence its structure and the mechanical properties of the near-surface layer: the microhardness of the material of the target increases by 1.4 times. It was established that a thin layer of microparticles is formed on the surface of a metal treated with them and that these particles are embedded in its structure
   
Author:  V. M. Fomin, T. A. Brusentseva, A. A. Filippov, M. A. Yadrenkin, P. E. Tyustin
Keywords:  electrodynamic rail accelerator, tungsten carbide, steel target, coating, nanoindentation, electron microscopy
Page:  1659