Resumen

ORTIZ, M. F.; ALFONSO, J. E.; OLAYA, J. J.  y  RODIL, S. E.. PRODUCCIÓN Y CARACTERIZACIÓN DE RECUBRIMIENTOS DE BISMUTO PRODUCIDOS CON MAGNETRÓN DESBALANCEADO PULSADO. Rev. acad. colomb. cienc. exact. fis. nat. [online]. 2013, vol.37, n.143, pp.245-251. ISSN 0370-3908.

In this work present the results obtained in the growth of Bi coatings onto common glass, silicon and stainless steel 316 L substrates through dc unbalanced magnetron sputtering and evaluation of the microstructure, morphology, chemical superficial composition and electrochemical properties was made as a function of the frequency pulse of the power supply are presented. The microstructure of the coatings was evaluated through x-ray diffraction (XRD); the morphology was evaluated through atomic force microscopy (AFM); the superficial chemical composition was analyzed by x-ray photoelectrons spectroscopy (XPS), electrochemical test was evaluated by means of corrosion windows and the adherence between coating and substrate was evaluated by streaked test. The XRD analysis shows that the coatings are polycrystalline, the AFM analysis determined that the mean rugosity of Bi coatings was of the 25 nm. The XPS analysis shows that there are binding energies associated to metallic bismuth and oxide bismuth. The electrochemical test established that the Bi coatings show a range of potential between -0,315 y 1,49 mV. Finally, the adherence test show that the coatings failure occurs when is subjected to a load of 4.5 N.

Palabras clave : Coatings; DC sputtering; Photoelectrons; adherence.

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