Listar BA. Grupos de Investigación por autor "Ferrer Pacheco, Martha Yasmid"

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Coating of tricalcium phosphates by flame spray

Ferrer Pacheco, Martha Yasmid; García, I H; Rodríguez, L F (Journal of Physics: Conference SeriesInglaterra, 2019-11-29)

The metal alloys used for prostheses with high mechanical requirements are bioinerts, it means they have low integration with bone tissue, therefore, bioactive coatings are used in order to improve this integration. ...
Effect of concentration of starch in the properties morphological and structural of porous ceramic based on expansive clays

Peña Rodriguez, Gabriel; Dulce Moreno, Hector Jaime; Ferrer Pacheco, Martha Yasmid; Suarez, M; Bermudez, D (Journal of Physics: Conference SeriesLondres, Reino Unido, 2020-03-06)

In this article is used the sacrificial material method to generate different porosities between 44.42% and 69.14% in ceramics based on expansive clays from San Jose de Cúcuta metropolitan area, Colombia, to analyze the ...

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Coating of tricalcium phosphates by flame spray
...
Ferrer Pacheco, Martha Yasmid | 2019-11-29

The metal alloys used for prostheses with high mechanical requirements are bioinerts, it means they have low integration with bone tissue, therefore, bioactive coatings are used in order to improve this integration. Hydroxyapatite is one of the most studied materials for this application with good results, however, sometimes there are problems due to wear or tear of the coating leading prostheses loss. Tricalcium phosphate, Ca3(PO4)2, in its different phases shows osteoconductivity and higher solubility than hydroxyapatite, however, few studies have been carried out to determine its behavior as a coating for this type of applications. In this work, a study of the behavior of tricalcium phosphate as a coating on Ti6Al4V substrates obtained by flame spraying was carried out. As raw material were used tricalcium phosphate powders obtained by precipitation from calcium nitrate and ammonium phosphate dihydrogen solution, and subsequent calcination at 1,100°C. The Ca/P molar ratio obtained is 1.48 and the only present crystalline phase is beta -tricalcium phosphate. The coatings obtained have alpha tricalcium phosphate as only crystalline phase, they have compact morphology with low porosity and good wettability with the substrate, which is an index of good adhesion and good mechanical behavior. The transformation from beta- to alpha- tricalcium phosphate is product of the high temperatures used in the process, which are higher than 1,125°C where this transformation occurs.

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Effect of concentration of starch in the properties morphological and structural of porous ceramic based on expansive clays
...
Peña Rodriguez, Gabriel | 2020-03-06

In this article is used the sacrificial material method to generate different porosities between 44.42% and 69.14% in ceramics based on expansive clays from San Jose de Cúcuta metropolitan area, Colombia, to analyze the effect of concentration of starch (porogenic agent) in the morphological and structural properties using calcium carbonate as a stabilizer. The porous ceramics was characterized by X-ray diffraction, scanning electron microscopy and energy dispersive X-ray spectroscopy. Finally, the images were analyzed with the software Image J, Image Tool and Origin. The results showed that the weight concentration of starch has a relationship with the average pore size, the number of pores and the porous area of the samples where the percentage of porous area and the average pore size of the mixtures increases as starch is added due to the decay of the sacrificial material. The number of pores of the mixtures decreased by increasing the weight concentration of the starch due to the agglomeration of the starch.

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Listar BA. Grupos de Investigación por autor "Ferrer Pacheco, Martha Yasmid"

Coating of tricalcium phosphates by flame spray

Effect of concentration of starch in the properties morphological and structural of porous ceramic based on expansive clays

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Coating of tricalcium phosphates by flame spray

Effect of concentration of starch in the properties morphological and structural of porous ceramic based on expansive clays

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Listar BA. Grupos de Investigación por autor "Ferrer Pacheco, Martha Yasmid"

Coating of tricalcium phosphates by flame spray ﻿

Effect of concentration of starch in the properties morphological and structural of porous ceramic based on expansive clays ﻿

Envíos recientes

Coating of tricalcium phosphates by flame spray

Effect of concentration of starch in the properties morphological and structural of porous ceramic based on expansive clays

Portales Institucionales

Coating of tricalcium phosphates by flame spray

Effect of concentration of starch in the properties morphological and structural of porous ceramic based on expansive clays