Resumo

MINA, A.; CAICEDO, J.C.  e  APERADOR, W.. Study of dynamical properties in β-TCP/CH layers. Rev. mex. fis. [online]. 2015, vol.61, n.2, pp.137-148. ISSN 0035-001X.

β-Tricalcium phosphate/Chitosan (β-TCP/Ch) coatings were deposited on 316L stainless steel (316L SS) substrates by a cathodic electro-deposition technique at different coating compositions. The crystal lattice arrangements were analyzed by X-Ray diffraction (XRD), and the results indicated that the crystallographic structure of β-TCP was affected by the inclusion of the chitosan content. The changes in the surface morphology as a function ofincreasing chitosan in the coatings via scanning electron microscopy (SEM) and atomic force microscopy (AFM) showed the root-mean squares hardness of the β-TCP/Ch coatings decreased by further increasing chitosan percentage. The elastic-plastic characteristics of the coatings were determined by conducting nanoindentation test, indicating that the increase if chitosan percentage is directly related to increasing the hardness and elastic modulus of the β-TCP/Ch coatings. Tribological characterization was performed by scratch test and pin-on-disk test to analyze the changes in the surface wear the β-TCP/Ch coatings. Finally, the results indicated an improvement in the mechanical and tribological properties of the β-TCP/Ch coatings as a function of increasing of the chitosan percentage.

Palavras-chave : Surfaces; monolayers; coatings; electrochemical techniques; hardness.

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