Listar por autor "Rodriguez Wilches, Luis Francisco"

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Obtaining and characterization of nanostructured coatings of zirconiaalumina- ceria by thermal spray flame

Peña Rodriguez, Gabriel; Ferrer, Martha; Rodriguez Wilches, Luis Francisco (Journal of Physics: Conference Series, 2019-11-19)

Zirconia, alumina and ceria powders were agglomerated, by granulator disk, to be used as raw material in the manufacture of coatings on red clay substrates by flame spray. Three mixtures of different compositions were made ...
Obtaining and characterizing of WC-Co coatings obtained from thermal spray by flame

Peña Rodriguez, Gabriel; Ferrer, Martha; Rodriguez Wilches, Luis Francisco (Journal of Physics: Conference SeriesLondres, Reino Unido, 2019-11-29)

Tungsten carbide is used in the production of cutting tools for steel and as protection against wear due to its extremely high hardness. High speed oxygen fuel spraying process has been widely used to deposit WC-Co coatings. ...

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Obtaining and characterization of nanostructured coatings of zirconiaalumina- ceria by thermal spray flame
...
Peña Rodriguez, Gabriel | 2019-11-19

Zirconia, alumina and ceria powders were agglomerated, by granulator disk, to be used as raw material in the manufacture of coatings on red clay substrates by flame spray. Three mixtures of different compositions were made to determine which of them produces the most homogeneous and best bonded coatings. Likewise, the phase transformations that occur in the thermal spraying process were evaluated. The morphology and microstructure of the powders and coatings were determined by scanning electron microscopy and X-ray diffraction, respectively. Bimodal coatings were obtained, preserving the nanometric structure of the powders, homogeneous, low porosity and good adhesion.

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Obtaining and characterizing of WC-Co coatings obtained from thermal spray by flame
...
Peña Rodriguez, Gabriel | 2019-11-29

Tungsten carbide is used in the production of cutting tools for steel and as protection against wear due to its extremely high hardness. High speed oxygen fuel spraying process has been widely used to deposit WC-Co coatings. However, the decomposition and oxidation of WC-Co has been reported during the process, where carbon and tungsten are released, resulting in the formation of an amorphous matrix with the cobalt of the compound. This is attributed to the high heating and cooling rates suffered by the raw material. An alternative method is the thermal spray by flame, which allows controlling the working temperature and the residence time of the particles in the hot flame, avoiding the decomposition of tungsten carbide, on the other hand, it is a versatile and a low cost method. In this study projection parameters of a WC-18Co coating sprayed with a thermal flame spraying process from a commercial feedstock powder were determined to decide the conditions under which compact coatings are obtained with low porosity, avoiding dissociation of the tungsten carbide. The composition of the powders and substrates was determined by X-ray fluorescence microscopy and optical emission, respectively, X-ray diffraction studies were performed to characterize compositions and microstructures the coatings sprayed; the morphology was by scanning electron microscope. It was found that the best condition for this type of coatings is a neutral flame at a projection distance of 12 cm.

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Listar por autor "Rodriguez Wilches, Luis Francisco"

Obtaining and characterization of nanostructured coatings of zirconiaalumina- ceria by thermal spray flame

Obtaining and characterizing of WC-Co coatings obtained from thermal spray by flame

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Obtaining and characterization of nanostructured coatings of zirconiaalumina- ceria by thermal spray flame

Obtaining and characterizing of WC-Co coatings obtained from thermal spray by flame

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Listar por autor "Rodriguez Wilches, Luis Francisco"

Obtaining and characterization of nanostructured coatings of zirconiaalumina- ceria by thermal spray flame ﻿

Obtaining and characterizing of WC-Co coatings obtained from thermal spray by flame ﻿

Envíos recientes

Obtaining and characterization of nanostructured coatings of zirconiaalumina- ceria by thermal spray flame

Obtaining and characterizing of WC-Co coatings obtained from thermal spray by flame

Portales Institucionales

Obtaining and characterization of nanostructured coatings of zirconiaalumina- ceria by thermal spray flame

Obtaining and characterizing of WC-Co coatings obtained from thermal spray by flame