KARLA JUDITH MORENO BELLO
@celaya.tecnm.mx
Mechanical Engineering Department,
National Technological Institute of Mexico (TecNM) in Celaya
RESEARCH, TEACHING, or OTHER INTERESTS
Mechanical Engineering, Metals and Alloys, Materials Science, General Materials Science
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
J. Santos García-Miranda, Luis Daniel Aguilera-Camacho, María Teresa Hernández-Sierra, and Karla J. Moreno
MDPI AG
Eco-friendly lubricant research continues to increase since it has a comparative performance to commercial mineral lubricants to overcome the effects of environmental impact. However, the efficiency of these green lubricants depends on specific applications. In this study, we analyzed the friction and wear performance of a castor/sesame oil mixture as an eco-friendly lubricant and its comparison to a commercial mineral lubricant tested in a metallic system employed in bearing elements. For this purpose, AISI 8620 steel against ISO 100Cr6 was used as tribological pair. The friction and wear tests were carried out through a Tribometer of ball-on-disk configuration under boundary lubricating conditions, whereas the worn surfaces were investigated by using optical and electron microscopy. The physical properties and the rheological properties of the lubricants were also determined. The friction and wear performance between the eco-friendly lubricant and mineral oil were similar so that the CLE were comparable. The CLE values in terms of friction and wear ranged from 86% to 99.4%, respectively.
María Teresa Hernández-Sierra, José E Báez, Luis Daniel Aguilera-Camacho, J Santos García-Miranda, and Karla J Moreno
SAGE Publications
Lubrication is an essential mechanism to make machines and engines more efficient by lowering friction and wear. Despite this, to mitigate environmental damage, lubricants must come from renewable sources and be biodegradables. Therefore, this study analyzed the use of Curcumin as a natural additive in two green oils to improve their tribological and oxidative performance. The density and viscosity of lubricants with and without curcumin additive, as well as the lubrication regime, were determined. The operational performance was analyzed by tribological tests under a ball-on-disk configuration at 100°C based on the ASTM G99. The oxidative behavior of lubricants was examined by studying the IR bands for primary and secondary oxidative products, as well as by DSC-TGA techniques for evaluating the Oxidation Onset Temperature and the thermogravimetric behavior. At the studied conditions, the incorporation of Curcumin into the oils increased the viscosity of the lubricants up to 46%, the friction coefficient decreased up to 70%, and wear was diminished up to 96%, despite working in boundary lubrication. Moreover, the addition of curcumin noticeably enhanced the oxidation behavior of lubricants. The results of this research suggest that Curcumin is an excellent option to improve the physical properties, operational performance, and oxidative stability of green oils to create effective and environmentally friendly lubricants.
Eloy Rodríguez-deLeón, Moustapha Bah, José E. Báez, María T. Hernández-Sierra, Karla J. Moreno, Alejandro Nuñez-Vilchis, José Bonilla-Cruz, and Kenneth J. Shea
Royal Society of Chemistry (RSC)
Sustainable polyesters initiators from renewable resources and additives in green lubricants.
Ricardo Ortega-Álvarez, María T. Hernández-Sierra, Luis D. Aguilera-Camacho, Micael G. Bravo-Sánchez, Karla J. Moreno, and J. Santos García-Miranda
MDPI AG
There is a great need to perform all processes and services more efficiently to reduce energy consumption and material waste. Bearing systems are present in all machines and motors, playing an important role in the reduction of energy consumption. 100Cr6 (ISO 683-17:2014) and AISI 8620 are two typical steels employed in most bearing systems. However, improving the tribological performance of these steels is still required. This study reports the analysis of green lubricants based on mixtures of vegetable oils to improve the friction and wear properties of steel bearing systems. Firstly, a method is presented to identify potential mixtures based on the excess thermodynamic properties. Then, the tribological performance of the 100Cr6/8620 steel bearing system lubricated with the selected mixtures is evaluated by the ball-on-disk method. It was found that the friction and wear behavior of the 100Cr6/8620 steel bearing system can be notably improved by the utilization of oil mixtures rather than pure green oils. The kinetic friction coefficient decreased up to 10% with the ideal mixture of castor and sesame oil, while wear was reduced up to 81% with the ideal mixture of castor and canola oil. Therefore, we suggest that vegetable oil blends may be a good option for the feasible manufacture of biolubricants for bearing systems.
Paola Denisse Falcón-Torres, Ana Gabriela Morales-Segoviano, Adrián Alejandro Martínez-Salazar, María Guadalupe Ortiz-Aldaco, Rodrigo Navarro, Ángel Marcos-Fernández, Aurelio Ramírez-Hernández, Karla J. Moreno, and José E. Báez
Springer Science and Business Media LLC
Karla J. Moreno, María Teresa Hernández-Sierra, José E. Báez, Eloy Rodríguez-deLeón, Luis Daniel Aguilera-Camacho, and J. Santos García-Miranda
MDPI AG
The present study focuses on an introductory analysis of the use of three xanthophylls as additives for green lubricant applications. For this purpose, the additives were characterized by FTIR and 1H-NMR techniques, and the bio-lubricants were described by their physical properties. The effect of the natural compounds on the friction and wear properties of bio-lubricants were evaluated by sliding friction tests under boundary conditions, as confirmed by an analysis of the lubricating film thickness. The antioxidant capacity was analyzed by FTIR spectroscopy. It was observed better wear protection in castor oil with xanthophylls than without these additives. The wear rate was reduced up to 50% compared with neat oil. Lesser beneficial effects were appreciated in friction coefficient since it was increased 25%. The best contribution was observed with astaxanthin as an additive. In addition, a significant improvement in the oxidation of castor oil, complemented with this additive, was exhibited by FTIR analysis. It was found that xanthophylls could be employed as additives for totally biodegradable lubricant applications since they have better tribological and antioxidant behavior than current additives.
Luis D. Aguilera-Camacho, María T. Hernández-Sierra, J. Santos García-Miranda, and Karla J. Moreno
MDPI AG
AISI 4140 steel is still one of the most distinguished steels employed in tribological applications because of its low cost, great mechanical properties, and appropriate wear resistance. In this contribution, the tribological performance of AISI 4140 annealed steel against engineering ceramic was analyzed to promote parameters for the application of this steel, especially in systems that are subjected to contact pressures between 490–1240 MPa. Dry and lubricated pin-on-disk experiments were completed at different normal loads. The worn surfaces were analyzed by contact profilometry, optical and scanning electron microscopies, energy dispersive spectroscopy, and microhardness examinations. In dry conditions, a better friction response was found on the steel tested with ZrO2. Friction coefficient and wear rate resulted in reductions up to 60% and 99% compared with those obtained with Al2O3 and Si3N4 counterparts. A strain-hardening phenomenon due to the friction process was observed on the samples tested with ZrO2 and Si3N4, which showed grain refinement and hardness increment on worn surfaces. Therefore, those systems exhibited better wear responses. In lubricated conditions, all counterparts exhibited low friction and wear, but the performance of Al2O3 and Si3N4 was highlighted. The results demonstrate that the performance of AISI 4140 annealed steel under the tested conditions is comparable with that of the same steel with other surface treatments.
María T. Hernández-Sierra, Juan E. Marta, Luis D. Aguilera-Camacho, J.S. García-Miranda, José E. Báez-García, and Karla J. Moreno
Springer Science and Business Media LLC
María T. Hernández-Sierra, Micael G. Bravo-Sánchez, Luis D. Aguilera-Camacho, José E. Báez, J. S. García-Miranda, and Karla J. Moreno
Springer Science and Business Media LLC
María T. Hernández-Sierra, Micael G. Bravo-Sánchez, José E. Báez, Luis D. Aguilera-Camacho, J. Santos García-Miranda, and Karla J. Moreno
MDPI AG
Although much has been learned and investigated about environmentally friendly lubricants in recent years, several issues remain critical to their use in specific applications. A key point that could be limiting their utilization is that the effect of green lubricants on the tribological and mechanical properties of the elements has not been thoroughly studied since such attributes determine their performance in industrial applications. For this reason, in this research, the effect of green lubrication on the tribological and hardness properties of AISI 4140 steel was studied. The performance of three bio-based lubricants was studied and compared to that of five of the most representative lubricants. First, the lubricants were chemically and physically characterized. Then, the effect of each lubricant on the friction and wear behavior of the system was analyzed by kinetic friction coefficient, wear rate calculations, and microhardness measurements. In general, the bio-based lubricants exhibited the lowest values of friction and wear. Further the mechanical properties of the systems lubricated by these lubricants were not affected or were affected to a lesser degree.
José E. Báez, Ángel Marcos-Fernández, Rodrigo Navarro, Carolina García, Aurelio Ramírez-Hernández, and Karla J. Moreno
Springer Science and Business Media LLC
Ricardo Ortega-Álvarez, Guillermo E. Aguilar-Cortés, María T. Hernández-Sierra, Luis D. Aguilera-Camacho, J. S. García-Miranda, and Karla J. Moreno
Springer Science and Business Media LLC
The aim of this investigation was to study castor, canola, and sesame vegetable oils in order to evaluate their potential use as lubricants in steel mechanical components. For this purpose, densities of each oil were evaluated using the pycnometer method, as well as their dynamic viscosities through a Brookfield DV-II rotational viscometer. Both properties were evaluated at temperatures of 25, 40 and 100 °C. Additionally, viscosity indexes were determined according to ASTM D 2270. These rheological properties were used to estimate the lubrication regime considering parameters of real contact conditions in mechanical components. Friction and wear analyses were carried out to investigate the behaviour of the vegetable oil as lubricants. Such tests were carried out at room temperature on a CSM tribometer with pin-on-disk configuration by using castor, canola and sesame oils as lubricants. AISI 4140 hardened steel against AISI 100Cr6 steel pin was used as a mechanical component. From the rheological study, it was observed that canola and sesame oils behave as dilatant fluids at the evaluated temperatures, while castor oil behaves like a Newtonian fluid at 25 and 40 °C. Castor oil showed the highest density value among oils studied, but it also exhibited the lowest value of viscosity index (271). Contrarily, sesame oil was the least dense, but it exhibited the highest viscosity index (545). On the other hand, the lubrication regime study showed that by using castor oil as a lubricant in the mechanical component (4140/100Cr6), the system worked in a mixed lubrication regime while by using canola and sesame oils the system operated in boundary lubrication conditions. Finally, the kinetic friction coefficients were different for each lubricant obtaining the lowest value with castor oil while the highest value of friction coefficient was exhibited by the sesame oil lubricant.
M. T. Hernández-Sierra, L. D. Aguilera-Camacho, Arturo Ponce, J. S. García-Miranda, and K. J. Moreno
Springer Science and Business Media LLC
María Hernández-Sierra, Luis Aguilera-Camacho, José Báez-García, J. García-Miranda, and Karla Moreno
MDPI AG
Virginia Campos-Sanabria, María T. Hernández-Sierra, Micael G. Bravo-Sánchez, Luis D. Aguilera-Camacho, J. S. García-Miranda, and Karla J. Moreno
Springer Science and Business Media LLC
Poly (methyl methacrylate)/hydroxyapatite (PMMA/HAp) nanocomposites with HAp nanoparticles content of 12 wt.% were obtained by free-radical polymerization synthesis. Three different concentrations of benzoyl peroxide (PBO) of 3, 6, and 12 wt.% were studied. The results showed that the concentration of PBO has an effect on the performance of composites. In particular, the nanocomposite with the highest concentration of PBO presented the best mechanical and tribological behavior, as well as the lowest values of water absorption and porosity percent.
Ricardo Ortega-Álvarez, María T. Hernández-Sierra, Benjamín Arroyo-Ramírez, Luis D. Aguilera-Camacho, J. S. García-Miranda, and Karla J. Moreno
Springer Science and Business Media LLC
The aim of this research was to investigate the influence of substrate roughness on the adhesion and tribological performance of thin TiN coatings obtained by physical vapor deposition. For that purpose, substrates of AISI H13 steel with surface finishes of 0.06, 0.28 and 0.90 μm in Ra were coated with TiN under the same coating conditions. The chemical composition of the steel, as well as that of the TiN coating, were obtained using EDS analysis. Adhesion tests were carried out following the procedure of BSi 1071-8 standard while hardness was evaluated by ASTM C 1327-03. On the other hand, dry sliding friction tests were conducted with a pin-on-disk tribometer, according to the ASTM G 99-05 standard. This study showed that the roughness of the coating increases as the substrate roughness increases. Regarding adhesion and hardness, all the samples showed an adhesion class 1 according to the standard and a hardness value of 14.51 GPa. Nevertheless, the highest substrate roughness produced the best adhesion. On the other hand, the lowest values for the friction coefficient and wear behavior were obtained by the sample with the lowest substrate roughness of 0.06 μm. In addition, it was found that friction and wear increase when the substrate roughness increases.
Luis Daniel Aguilera Camacho, Santos García Miranda, and Karla Judith Moreno
Springer Science and Business Media LLC
M. T. Hernández-Sierra, R. Ortega-Álvarez, M. G. Bravo-Sánchez, L. D. Aguilera-Camacho, J. S. García-Miranda, and K. J. Moreno
Springer Science and Business Media LLC
KJ Moreno, JS García-Miranda, C Hernández-Navarro, F Ruiz-Guillén, LD Aguilera-Camacho, R Lesso, and A Arizmendi-Morquecho
SAGE Publications
Compressive strength, micro-hardness indentation, friction, and wear tests of the poly(methyl methacrylate)/hydroxyapatite nanocomposite have been performed and evaluated in order to study the potential application of this nanocomposite in the field of bone tissue regeneration. PMMA/HA nanocomposite in the form of bulk has been successfully prepared by a simple mixture between PMMA and HA nanoparticles. The compressive strength value of PMMA/HA nanocomposite was found to be ∼90 MPa; whereas the compressive Young’s modulus was 840 MPa, and the micro-hardness obtained was 55 MPa. According to the results, PMMA/HA nanocomposite exhibit an acceptable elastic modulus for its possible consideration in the tissue engineering. The wear rate value of the nanocomposite PMMA/HA was found to be at the same magnitude for its similar applied as coating reported previously, while friction coefficients showed higher values.
L. D. Aguilera-Camacho, C. Hernández-Navarro, K. J. Moreno, J. S. García-Miranda, and A. Arizmendi-Morquecho
Springer Science and Business Media LLC
M.A. Frechero, O.J. Durá, M.R. Díaz-Guillén, K.J. Moreno, J.A. Díaz-Guillén, J. García-Barriocanal, A. Rivera-Calzada, A.F. Fuentes, and C. León
Elsevier BV
Ana Arizmendi-Morquecho, Araceli Campa-Castilla, C. Leyva-Porras, Josué Almicar Aguilar Martinez, Gregorio Vargas Gutiérrez, Karla Judith Moreno Bello, and L. López López
Hindawi Limited
Twin wire arc spraying (TWAS) was used to produce an amorphous crystalline Fe-based coating on AISI 1018 steel substrate using a commercial powder (140MXC) in order to improve microhardness and wear properties. The microstructures of coating were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM) as well as the powder precursor. Analysis in the coating showed the formation of an amorphous matrix with boron and tungsten carbides randomly dispersed. At high amplifications were identified boron carbides at interface boron carbide/amorphous matrix by TEM. This kind of carbides growth can be attributed to partial crystallization by heterogeneous nucleation. These interfaces have not been reported in the literature by thermal spraying process. The measurements of average microhardness on amorphous matrix and boron carbides were 9.1 and 23.85 GPa, respectively. By contrast, the microhardness values of unmelted boron carbide in the amorphous phase were higher than in the substrate, approaching 2.14 GPa. The relative wear resistance of coating was 5.6 times that of substrate. These results indicate that the twin wire arc spraying is a promising technique to prepare amorphous crystalline coatings.
A. Chavez-Valdez, A. Arizmendi-Morquecho, K.J. Moreno, J.A. Roether, J. Kaschta, and A.R. Boccaccini
Elsevier BV
Luis E. Torres-Parga, Carolina Hernández-Navarro, Karla J. Moreno-Bello, J.S. García-Miranda, Luis D. Aguilera-Camacho, Raúl Lesso-Arroyo, Benjamín Arroyo-Ramírez, and Álvaro Sánchez-Rodríguez
Springer Science and Business Media LLC
ABSTRACTSol-gel coatings show an excellent chemical stability, oxidation control and enhanced corrosion resistance for metal substrates. An organic-inorganic hybrid consisting of poly (methyl methacrylate) (PMMA) and silica (SiO2) was successfully synthesized in the form of solution, by using 3-(trimethoxysilyl) propyl methacrylate (TMSPM) as a coupling agent and cohydrolyzed with tetraethyl orthosilicate (TEOS) to afford chemical bondings to the forming silica networks by a sol-gel method. The as-synthesized hybrid material was subsequently characterized by Fourier Transformation infrared (FTIR) spectroscopy. PMMA-SiO2 was applied as a protective film on hardness steel substrates by dip-coating. The thickness of the coating was 25 µm, while the roughness Ra = 0.6 µm. The wear and friction behavior of the coating on hardened steel (HS) was evaluated by a ball-on-disk test in dry conditions with a AISI steel ball as counterface applying 2, 4, 6, 8 and 10 N normal loads. Friction coefficient values (µk) were in the range of 0.76 to 0.99, whereas the lowest wear rate (k) was observed at 6N with a value of 1.30x10-4 (mm3(Nm)-1).
S. García-Villarreal, A. Chávez-Valdez, K.J. Moreno, C. Leyva, J.A. Aguilar-Martínez, A. Hurtado, and A. Arizmendi-Morquecho
Elsevier BV