Nanostructured surfaces

Laser ablation of Fe-Al-C alloys containing a diamond phase
I. Dzevin1, O. Bavol1
G.V. Kurdyumov Institute for Metal Physics NAS of Ukraine
Vernadsky blvd., 36, Kyiv-03680, Ukraine
E-mail: dzevin@i.ua

	The features of the structural-and-phase state of Fe-Al-C alloys after high temperature – high pressure and subsequent pulsed laser treatment with surface melting have been investigated by means of scanning electron microscopy and Raman spectroscopy.
	It was established that the graphite spherical formations as well as ultrafine and nanosized spherical particles of iron and aluminum oxides are formed after pulsed laser treatment of the surface of Fe-Al-C alloys containing diamond crystals.
	Because the ultrafine and nanosized spherical oxide particles are inside the laser crater and along its perimeter on undisturbed diamond crystals, but are absent on the surface of graphite formations, it can be concluded that the deposition of matter from the plasma after laser pulse onto the sample surface occurs gradually: after laser ablation, firstly the precipitation of particles of the Fe and Al oxides, and then the carbon spherical formations, which in turn consist of a nanoscale carbon particles, are deposited.