Now showing items 1-5 of 5

Evaluation of the wear-corrosion process in beta-tricalcium(β-TCP) films obtained by physical vapor deposition (PVD)

Bautista-Ruiz, Jorge; Caicedo, Julio; Aperador Chaparro, Willian (Tribology in IndustryBelgrado , Serbia, 2019)

A simultaneous evaluation was done of the wear-corrosion of the coatings of beta-tricalcium phosphate on titanium (Ti) substrate deposits obtained by the magnetron sputtering technique. The characterization was developed ...
Production of electroplated rhenium coatings using pulsating currents

Unknown author (Rasayan Journal of ChemistryIndia, 2021-06)

Rhenium was the most interesting material because it can be oxidized at high temperatures, so it is a promising applicant in biomedical applications. Its high melting point requires techniques such as electro-coating to ...
Sol-Gel Synthesis of Titanium/Bismuth Oxide Coatings for Biocompatibility Applications on 316L Stainless Steel

Aperador Chaparro, William Arnulfo; Bautista-Ruiz, Jorge; Caicedo, J. C. (Indian Journal of Science and TechnologyNueva Delhi, 2018-05)

Objectives: This study was carried out in order to establish the potential offered by the sol-gel method to obtain Titanium/ Bismuth oxide coatings on 316L Stainless Steel (SS) substrates in biocompatibility applications. ...
Synthesis and corrosion resistance evaluation of coatings of SiO2-TiO2-ZrO2-BiO2 on 316L stainless produced by sol-gel

Olaya, Jhon; Bautista-Ruiz, Jorge; Alfarez, Fabio Leonardo (Boletin de la Sociedad Espanola de Ceramica y VidrioMadrid , España, 2018-10)

En este trabajo se presenta la síntesis y la evaluación de la resistencia a la corrosión de recubrimientos de SiO2-TiO2-ZrO2-BiO2 depositados por la técnica de centrifugado sobre acero inoxidable AISI 316L. Los soles se ...
Tribocorrosion Behavior of Amorphous Carbon-Silicon Coated Titanium in Biological Medium

Bautista-Ruiz, Jorge; Aperador Chaparro, William Arnulfo; Caicedo, J.C. (Tribology in IndustrySerbia, 2018)

Studies of materials in biomedical applications have focused on the generation of new biomaterials and the development of surface modifications, mainly of metals. Amorphous silicon containing diamond like carbon DLC-Si ...

Envíos recientes

Evaluation of the wear-corrosion process in beta-tricalcium(β-TCP) films obtained by physical vapor deposition (PVD)
...
Bautista-Ruiz, Jorge | 2019

A simultaneous evaluation was done of the wear-corrosion of the coatings of beta-tricalcium phosphate on titanium (Ti) substrate deposits obtained by the magnetron sputtering technique. The characterization was developed by a tribometer system coupled to an electrochemical cell. This system allows the combination of corrosion and friction tests between the surface of the coating and the spherical bone pin. The synergy of the two wear phenomena was characterized, which were monitored by means of the electrochemical response as a function of the value of the friction coefficient. It was determined that the system generates a gradual film accumulation process, followed by an instantaneous loss after a critical period. Additionally, it is concluded that the increase in the coefficient of friction is not immediately followed by the increase in wear rate

LEER
Production of electroplated rhenium coatings using pulsating currents
...
| 2021-06

Rhenium was the most interesting material because it can be oxidized at high temperatures, so it is a promising applicant in biomedical applications. Its high melting point requires techniques such as electro-coating to produce it in thin-film formation, using a current of 40 mA/cm2 , in a cathode pulse and 4 mA/cm2 , in anodic form, the variation in temperature of the acid electrolytic bath being realized in a range of 60 to 85±2 °C. The temperature variation of the samples allowed to correlate their response to the degradation phenomenon. The topographical evaluation using atomic force microscopy on the surface of the samples permitted to indicate that a tendency of the roughness to reduce with the increase of the temperature up to 80 °C existed, an electrochemical evaluation was generated using Tafel polarization curves, immersed in a Ringer's lactate solution with a temperature of 37 °C, has now been subsequently performed using the scanning electron microscope, the surface analysis of the coatings, demonstrating that at deterioration is negligible, but when increasing the temperature to 80 °C, the deterioration is imperceptible when the type of surface damage is unobservable, however in the case of 85 °C the deterioration is observable.

LEER
Sol-Gel Synthesis of Titanium/Bismuth Oxide Coatings for Biocompatibility Applications on 316L Stainless Steel
...
Aperador Chaparro, William Arnulfo | 2018-05

Objectives: This study was carried out in order to establish the potential offered by the sol-gel method to obtain Titanium/ Bismuth oxide coatings on 316L Stainless Steel (SS) substrates in biocompatibility applications. Methods/Analysis: The stable sol was synthesized by using Bismuth nitrate (III) pentahydrate and Titanium (IV) butoxide. The coatings were deposited by spin-coating technique at 4000 rpm and characterized topographically by Scanning Electron Microscopy SEM and structurally by X-ray diffraction XRD. Through the techniques of polarization potentiodynamic curves and Electrochemical Impedance Spectroscopy (EIS), the anticorrosive response of the �ilms was evaluated. The thickness was then measured, and biocompatibility test was developed. Findings: It was found that the coatings with high composition of the precursor titanium (IV) butoxide offer the best results as an anticorrosive application. Likewise, the growth of cells was uniform on the �ilms indicating that the medium offered by the �ilms does not present active cytotoxicity and surpasses by a large number the cellular growth level compared to stainless steel. Applications /Improvement: 316L (SS) is very useful in implantology, for its low cost compared with other materials. The implanted steel suffers corrosion by the physiological �luids of body. Titanium/Bismuth coatings establish a barrier between body �luids and SS implant.

LEER
Synthesis and corrosion resistance evaluation of coatings of SiO2-TiO2-ZrO2-BiO2 on 316L stainless produced by sol-gel
...
Olaya, Jhon | 2018-10

En este trabajo se presenta la síntesis y la evaluación de la resistencia a la corrosión de recubrimientos de SiO2-TiO2-ZrO2-BiO2 depositados por la técnica de centrifugado sobre acero inoxidable AISI 316L. Los soles se prepararon a partir de una mezcla de precursores orgánicos, como el tetraetoxisilano (TEOS) al 98%, tetrabutóxido de titanio (TBT) al 97%, zirconio (IV) butóxido (TBZ) al 80% en solución 1-butanol y nitrato de bismuto penta-hidratado Bi(NO3)3*5H2O. La resistencia a la corrosión se determinó mediante ensayos de curvas de polarización potenciodinámica y de espectroscopia de impedancia electroquímica (EIS) en una solución electrolítica de 3,5% Wt de NaCl + 0,5 M de H2SO4. A los soles preparados se les caracterizó mediante estudio reológico, de pH en función del tiempo, mediciones de espectroscopia de infrarrojo por transformada de Fourier (FTIR) y calorimetría diferencial de barrido (DSC). Los recubrimientos se caracterizaron mediante difracción de rayos X (XRD), microscopia electrónica de barrido (MEB), espectroscopia de energías dispersivas (EDX), fluorescencia de rayos X (XRF) y medidas de adherencia. Los resultados mostraron que las películas ofrecen una buena resistencia a la corrosión sobre el sustrato metálico disminuyendo los valores de densidades de corriente hasta en un orden de magnitud

LEER
Tribocorrosion Behavior of Amorphous Carbon-Silicon Coated Titanium in Biological Medium
...
Bautista-Ruiz, Jorge | 2018

Studies of materials in biomedical applications have focused on the generation of new biomaterials and the development of surface modifications, mainly of metals. Amorphous silicon containing diamond like carbon DLC-Si coating deposited on titanium substrate with the purpose of studying its biofunctionality. The behavior against the phenomenon of tribocorrosion of coatings DLC-Si deposited on titanium was evaluated, through the plasma-assisted chemical vapor deposition technique. The nanoindentation technique was used to determine the coating mechanical properties. The DLC-Si coatings were structurally analyzed through X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) techniques, the characteristic binding energy for the signal C1s was obtained from XPS. Via XRD results the amorphous structure of DLC-Si coating was determined. The triboelectrochemical results indicate that the coating shows an adequate wear and to corrosion protection when exposed to the synergic mechanism, thus demonstrating the protective coating effect

LEER

‹›

Repositorio Digital

Browsing by Subject "Corrosion"

Evaluation of the wear-corrosion process in beta-tricalcium(β-TCP) films obtained by physical vapor deposition (PVD)

Production of electroplated rhenium coatings using pulsating currents

Sol-Gel Synthesis of Titanium/Bismuth Oxide Coatings for Biocompatibility Applications on 316L Stainless Steel

Synthesis and corrosion resistance evaluation of coatings of SiO2-TiO2-ZrO2-BiO2 on 316L stainless produced by sol-gel

Tribocorrosion Behavior of Amorphous Carbon-Silicon Coated Titanium in Biological Medium

Envíos recientes

Evaluation of the wear-corrosion process in beta-tricalcium(β-TCP) films obtained by physical vapor deposition (PVD)

Production of electroplated rhenium coatings using pulsating currents

Sol-Gel Synthesis of Titanium/Bismuth Oxide Coatings for Biocompatibility Applications on 316L Stainless Steel

Synthesis and corrosion resistance evaluation of coatings of SiO2-TiO2-ZrO2-BiO2 on 316L stainless produced by sol-gel

Tribocorrosion Behavior of Amorphous Carbon-Silicon Coated Titanium in Biological Medium

Portales Institucionales

Enlaces de Interés

Contactos

Browsing by Subject "Corrosion"

Evaluation of the wear-corrosion process in beta-tricalcium(β-TCP) films obtained by physical vapor deposition (PVD) ﻿

Production of electroplated rhenium coatings using pulsating currents ﻿

Sol-Gel Synthesis of Titanium/Bismuth Oxide Coatings for Biocompatibility Applications on 316L Stainless Steel ﻿

Synthesis and corrosion resistance evaluation of coatings of SiO2-TiO2-ZrO2-BiO2 on 316L stainless produced by sol-gel ﻿

Tribocorrosion Behavior of Amorphous Carbon-Silicon Coated Titanium in Biological Medium ﻿

Envíos recientes

Evaluation of the wear-corrosion process in beta-tricalcium(β-TCP) films obtained by physical vapor deposition (PVD)

Production of electroplated rhenium coatings using pulsating currents

Sol-Gel Synthesis of Titanium/Bismuth Oxide Coatings for Biocompatibility Applications on 316L Stainless Steel

Synthesis and corrosion resistance evaluation of coatings of SiO2-TiO2-ZrO2-BiO2 on 316L stainless produced by sol-gel

Tribocorrosion Behavior of Amorphous Carbon-Silicon Coated Titanium in Biological Medium

Portales Institucionales

Evaluation of the wear-corrosion process in beta-tricalcium(β-TCP) films obtained by physical vapor deposition (PVD)

Production of electroplated rhenium coatings using pulsating currents

Sol-Gel Synthesis of Titanium/Bismuth Oxide Coatings for Biocompatibility Applications on 316L Stainless Steel

Synthesis and corrosion resistance evaluation of coatings of SiO2-TiO2-ZrO2-BiO2 on 316L stainless produced by sol-gel

Tribocorrosion Behavior of Amorphous Carbon-Silicon Coated Titanium in Biological Medium