Effect of substrate temperature on the resistance to wear for Nitec coatings deposited via thermal flame-spraying technique
DOI:
https://doi.org/10.18041/1794-4953/avances.2.267Keywords:
Flame thermal spraying, Wear, Abrasión, sand blasting, deposition temperaturaAbstract
Results for the deposition of nickel-based coatings on iron substrates using the thermal flame-spraying technique, with surface preparation by sand blasting, are presented. Basically, we studied the influence of the temperature of the substrate on the structural, morphological, and wear resistance properties. The coatings were structurally characterized via X-ray diffraction (XRD), and the surface morphology was characterized through scanning electron microscopy (SEM) and confocal laser microscopy (MLC). The chemical composition was determined by means of Xray fluorescence (XRF), and wear was evaluated by testing three-body abrasive wear, ball-on-disk and scratch tester. Through XRD results, it was established that the coatings are polycrystalline and have a bodycentered cubic (BCC) crystal structure at all deposition temperatures. SEM analysis determined that the surfaces of the films decrease their porosity as the deposit temperature increases, and wear tests showed that the coatings are more resistant to this test than is the substrate.
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