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High-temperature oxidation of CrN/AlN multilayer coatings

Bardi, U. ; Chenakin, S.P. ; Ghezzi, F. ; Giolli, C. ; Goruppa, A. ; Lavacchi, A. ; Miorin, E. ; Pagura, C. ; Tolstogouzov, A.

Applied surface science, 2005-12, Vol.252 (5), p.1339-1349 [Periódico revisado por pares]

Amsterdam: Elsevier B.V

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Título:
High-temperature oxidation of CrN/AlN multilayer coatings
Autor: Bardi, U. ; Chenakin, S.P. ; Ghezzi, F. ; Giolli, C. ; Goruppa, A. ; Lavacchi, A. ; Miorin, E. ; Pagura, C. ; Tolstogouzov, A.
Assuntos: Condensed matter: electronic structure, electrical, magnetic, and optical properties ; Condensed matter: structure, mechanical and thermal properties ; Cross-disciplinary physics: materials science; rheology ; Depth profiling ; Exact sciences and technology ; Mass-resolved ion scattering spectrometry (MARISS) ; Nitride multilayer coatings ; Physics ; Secondary ion mass spectrometry (SIMS) ; Unbalanced magnetron sputtering ; X-ray photoelectron spectroscopy (XPS)
É parte de: Applied surface science, 2005-12, Vol.252 (5), p.1339-1349
Notas: ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
Descrição: Experiments are reported on sputter depth profiling of CrN/AlN multilayer abrasive coatings by secondary ion mass spectrometry (SIMS) coupled with sample current measurements (SCM). The coatings were deposited by a closed-field unbalanced magnetron sputtering. It is shown that after oxidation tests, performed in air at 900 °C for 2 h and at 1100 °C for 4 h, the layered structure begins to degrade but is not destroyed completely. Oxidation at 1100 °C for 20 h causes total destruction of the coatings that can be attributed to a fast diffusion of oxygen, nickel, manganese and other elements along defect paths (grain boundaries, dislocations, etc.) in the coating. There are practically no nitrides in the near-surface layer after such a treatment and all the metallic components are in the oxidized form as follows from the data obtained by X-ray photoelectron spectroscopy (XPS). According to XPS and mass-resolved ion scattering spectrometry (MARISS), the surface content of Al in the heat-treated coatings has decreased in comparison with the as-received sample and that of Cr increased. Both XPS and MARISS data exhibit real increase in superficial concentration of the substrate materials (Mn and Ni) that is controversial if using SIMS alone. SCM turned out to be an informative depth profiling method complementary to more expensive and complicated SIMS, being particularly useful for structures with different secondary electron emission properties of the layers. SCM with predetermined SIMS calibration allows a routine characterization of coatings and other multilayer structures, particularly, in situations where the expenses of analysis can be justified.
Editor: Amsterdam: Elsevier B.V
Idioma: Inglês

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High-temperature oxidation of CrN/AlN multilayer coatings

Bardi, U. ; Chenakin, S.P. ; Ghezzi, F. ; Giolli, C. ; Goruppa, A. ; Lavacchi, A. ; Miorin, E. ; Pagura, C. ; Tolstogouzov, A.

Amsterdam: Elsevier B.V

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