Resumo

HINCAPIE-CAMPOS, Williams Steve; OLAYA, Jhon Jairo  e  ALFONSO-ORJUELA, Jose Edgar. Microstructural, mechanical and wear characterization of Cu _x Al _y coatings deposited via thermal projection. Dyna rev.fac.nac.minas [online]. 2017, vol.84, n.202, pp.155-163. ISSN 0012-7353.  http://dx.doi.org/10.15446/dyna.v84n202.64189.

In this work characterized the microstructure, adhesion and coefficient of wear of coatings of CuxAly deposited via thermal projection on brass substrates. In the study, the surface preparation of the substrate and an intermediate coating acting as an adhesive layer were used as evaluation parameters. The analysis of the chemical composition was done by X-ray fluorescence (FRX), structural analysis was performed by means of X-ray diffraction (XRD) and transmission electron microscopy (MET). Adhesion was determined by cross-hatching tests, the mechanical response was assessed by measuring the Knoop hardness and abrasive wear tests three bodies and "Pin on disk". The results permitted to establish that the coating without adhesive layer and prepared by metal blasting can be used in the recovery of pieces because it presents less cohesive failure.

Palavras-chave : Thermal spraying; abrasive wear; friction coefficient.

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