Análisis de recubrimientos superficiales mediante espectroscopia de plasmas inducidos por laser

F. C. ALVIRA; D. J. O. ORZI,; G. M. BILMES

Ensayos No Destructivos y Estructurales

Sociedad Argentina de Ensayos No destructivos

Lugar: Neuquen; Año: 2005 p. 247 - 251

Laser Induced Breakdown Spectroscopy (LIBS) is a fast and versatile technique that allow in-situ determination of the elementary composition of different materials. One of the most outstanding aspects of LIBS is its unique ability for carry out depth profile analysis facilitating the identification of layers composition in coatings of different thickness. Superficial coatings can be originated in artificial treatments carried out to modify properties and to improve the quality of the materials or being consequence of natural processes. The knowledge of the coating composition is a problem of great importance in fields so varied as industry; materials science, art or archaeology, among others. In this work we show how LIBS allows to carry out a deep profile analysis of different materials. In particular we study the composition of layered coatings of beared. Study were performed analyzing the optical spectrum of the plasma generated by nanosecond laser ablation with a Nd:YAG at 1064 nm. For the detection two types of systems were used: an Echelle spectrometer and a CCD camera that allows to detect several elements at the same time and a Czerwny-Turner spectrograph with a temporized intensified CCD camera that allows to carry out studies of temporal evolution of the spectral lines.