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1 Materials Science Poland

1 2015

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Synthesis of multicomponent metallic layers during impulse plasma deposition

Nowakowska-Langier K., Chodun R., Zdunek K.

Materials Science Poland

2015

Vol. 33, No. 4

841--846

Pulsed plasma in the impulse plasma deposition (IPD) synthesis is generated in a coaxial accelerator by strong periodic electrical pulses, and it is distributed in a form of energetic plasma packets. A nearly complete ionization of gas, in these conditions of plasma generation, favors the nucleation of new phase of ions and synthesis of metastable materials in a form of coatings which are characterized by amorphous and/or nanocrystalline structure. In this work, the Fe-Cu alloy, which is immiscible in the state of equilibrium, was selected as a model system to study the possibility of formation of a non-equilibrium phase during the IPD synthesis. Structural characterization of the layers was done by means of X-ray diffraction and conversion-electron Mossbauer spectroscopy. It was found that supersaturated solid solutions were created as a result of mixing and/or alloying effects between the layer components delivered to the substrate independently and separately in time. Therefore, the solubility in the Fe-Cu system was largely extended in relation to the equilibrium conditions, as described by the equilibrium phase diagram in the solid state.