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Wear modes in open porosity titanium matrix composites with TiC addition processed by spark plasma sintering

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Transactions of Nonferrous Metals Society of China 2019年第8期29卷 1653-1664页

作者： I. FARíAS L. OLMOS O. JIMéNEZ M. FLORES A. BRAEM J. VLEUGELS Departamento de Ingeniería de Proyectos Universidad de Guadalajara 45100 Zapopan Jalisco México Instituto de Investigaciones en Ciencias de la Tierra - inicit Universidad Michoacana de San Nicolás de Hidalgo 58060 Morelia Michoacán México KU Leuven Department of Materials Engineering Kasteelpark Arenberg 44 B-3001 Heverlee Belgium

This work focused on the influence of TiC reinforcing particles on the tribological properties of titanium matrix composites(TMCs)with open porosity,processed by spark plasma sintering(SPS).Materials composed of an equimolar mixture of Ti and TiH2 with 0,3,10 and 30 vol.% of TiC were sintered at 850 ℃.Nanoindentation and wear tests were carried out to assess the nanohardness and the wear resistance in a tribometer with a reciprocating sliding ball-on-flat *** showed a nanohardness increment from 5 to 14 GPa with increasing TiC *** coefficient of friction(CoF)showed a minimum of 0.2 for 10% TiC grade,which also showed the lowest wear *** the low TiC content sample,adhesive wear with severe plastic deformation was ***,medium content TiC sample showed a mechanical mixed layer(MML),whereas high TiC content composite showed abrasive as the main wear *** conclusion,the wear mechanisms,CoFs and wear volume changed with TiC content.

关键词： porous titanium spark plasma sintering wear titanium matrix composites

Constrained sintering and wear properties of Cu-WC composite coatings

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Transactions of Nonferrous Metals Society of China 2017年第10期27卷 2214-2224页

作者： J.L.CABEZAS-VILLA L.OLMOS H.J.VERGARA-HERNáNDEZ O.JIMéNEZ P.GARNICA D.BOUVARD M.FLORES División de Estudios de Posgrado e Investigación TecNM/Instituto Tecnológico de MoreliaAv. Tecnológico #1500 Colonia Lomas de Santiaguito Morelia Michoacán C. P. 58120 México inicit Universidad Michoacana de San Nicolás de HidalgoFco. J. Mujica S/N Morelia Michoacán C. P. 58060 México Universidad de Guadalajara Departamento de Ingeniería de ProyectosJosé Guadalupe Zuno # 48 Los Belenes Zapopan Jalisco C. P. 45100 México Univ. Grenoble Alpes CNRS SIMaP 38000 Grenoble France

Coatings of metal matrix composites(Cu?WC)were fabricated by solid-state *** reinforcing particles indifferent quantities from5%up to30%(volume fraction)were mixed with Cu *** mixing,the powders were poured ontothe surface of copper *** was carried out at1000°C under a reducing atmosphere in a vertical *** was affected by both rigid substrates and WC particles which retarded the radial and axial densification of ***,the coatings were strongly attached to the substrate,and WC particles were randomly distributed within the *** addition ofthe reinforcing particles enhanced the microhardness and reduced the volume loss in wear tests to1/17compared to the *** predominant wear mechanism was identified as abrasion at a load of5N.20%WC(volume fraction)reinforcingparticles led to the maximum values of properties for the composite coating.

关键词： constrained sintering dilatometry dry sliding wear microhardness metal matrix composites coating

Sintering kinetics of Ni_2FeSb powder alloys produced by mechanical milling

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Transactions of Nonferrous Metals Society of China 2016年第8期26卷 2126-2135页

作者： F.ALVARADO-HERNáNDEZ O.JIMéNEZ G.GONZALEZ-CASTANEDA V.BALTAZAR-HERNáNDEZ J.CABEZAS-VILLA M.ALBITER H.VERGARA-HERNáNDEZ L.OLMOS Unidad Académica de Ingeniería I Universidad Autónoma de ZacatecasJardín Juárez 147 Centro Histórico Zacatecas Zacatecas C. P. 98000 México Departamento de Ingeniería de Proyectos CUCEI Universidad de GuadalajaraBlvd. Marcelino García Barragán 1421 Olímpica Guadalajara Jalisco C. P. 44430 Mexico inicit Universidad Michoacana de San Nicolás de HidalgoFco. J. Mujica S/N C.U. Morelia Michoacán C. P. 58060 México División de Estudios de Posgrado e Investigación TecNM/Instituto Tecnológico de MoreliaAv. Tecnológico # 1500 Colonia Lomas de Santiaguito Morelia Michoacán C. P. 58120 México

A ternary Ni2FeSb shape memory alloy was fabricated by powder metallurgy route. Sintering kinetics was estimated from dilatometry tests; whereas the microstructure and morphology of the powder and consolidated bulk samples were evaluated by XRD and SEM, respectively. Microhardness tests were performed on the surface of sintered samples. The results indicated that milling time has an effect on the shape and particle size as well as the homogeneity of the crystalline structures of the powders. Samples with longer milling time presented higher relative densities, better distribution of the elements on the alloy as well as the L21 and martensite phases, which will give the shape memory effect. The estimated activation energy values ranged from 109 to 282 kJ/mol at temperatures between 750 and 1273 K, indicating that sintering is controlled mainly by volume diffusion. Microhardness was improved by increasing the milling time and the heating rate.

关键词： Ni-based shape memory alloy mechanical milling solid state sintering microhardness

Design and characterization of Ti6Al4V/20CoCrMo−highly porous Ti6Al4V biomedical bilayer processed by powder metallurgy

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Transactions of Nonferrous Metals Society of China 2021年第1期31卷 178-192页

作者： E.MIHALCEA H.J.VERGARA-HERNÁNDEZ O.JIMENEZ L.OLMOS J.CHÁVEZ D.ARTEAGA División de Estudios de Posgrado e Investigación Tecnológico Nacional de México/ITMoreliaAv.Tecnológico#1500Colonia Lomas de SantiaguitoMoreliaC.P.58120México Universidad de Guadalajara DIPJoséGuadalupe Zuno#48Los BelenesZapopanC.P.45100México inicit Universidad Michoacana de San Nicolás de HidalgoFco.J.Mujica S/NMoreliaC.P.58060México Departamento de Ingeniería Mecánica Eléctrica CUCEIUniversidad de GuadalajaraBlvd.Marcelino García Barragán 1421OlímpicaC.P.44430 GuadalajaraJaliscoMéxico Centro de Geociencias Universidad Nacional Autónoma de MéxicoBlvd.Juriquilla No.3001Querétaro 76230México

The aim of this work was to develop a Ti6Al4V/20CoCrMo−highly porous Ti6Al4V bilayer for biomedical *** powder metallurgy technique,with semi-solid state sintering as consolidation step,was employed to fabricate samples with a compact top layer and a porous bottom layer to better mimic natural *** densification behavior of the bilayer specimen was studied by dilatometry and the resulting microstructure was observed by scan electron microscopy(SEM)and computed microtomography(CMT),while the mechanical properties and corrosion resistance were evaluated by compression and potentiodynamic tests,*** results indicate that bilayer samples without cracks were obtained at the interface which has no negative impact on the *** values of the highly porous layer were in the lower range of those of human *** compression behavior is dictated by the highly porous Ti6Al4V ***,the corrosion resistance of Ti6Al4V/20CoCrMo is better than that of Ti6Al4V,which improves the performance of the bilayer *** work provides an insight into the important aspects of a bilayer fabrication by powder metallurgy and properties of Ti6Al4V/20CoCrMo−highly porous Ti6Al4V structure,which can potentially benefit the production of customized implants with improved wear performance and increased in vivo lifetime.

关键词： bilayer structure composites porosity sintering permeability compression behavior corrosion

Corrosion and tribocorrosion behavior of Ti6Al4V/xTiN composites for biomedical applications

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Transactions of Nonferrous Metals Society of China 2022年第2期32卷 540-558页

作者： J.CHÁVEZ O.JIMÉNEZ D.BRAVO-BARCENAS L.OLMOS F.ALVARADO-HERNÁNDEZ M.A.GONZÁLEZ A.BEDOLLA-JACUINDE M.FLORES Departamento de Ingeniería Mecánica Eléctrica CUCEIUniversidad de GuadalajaraBlvd.Marcelino García Barragán#1421GuadalajaraC.P.44430México Departamento de Ingeniería de Proyectos CUCEIUniversidad de GuadalajaraJoséGuadalupe Zuno#48Los BelenesZapopanC.P.45150México Departamento de Ingeniería de Proyectos CUCEIUniversidad de Guadalajara-CONACyTBlvd.Marcelino García Barragán#1421GuadalajaraC.P.44430México Instituto de Investigaciones en Ciencias de la Tierra INICITUniversidad Michoacana de San Nicolás de HidalgoAv.Francisco J.Mujica S/NCiudad UniversitariaMoreliaMichoacánC.P.58030México Unidad Académica de Ingeniería I Universidad Autónoma de ZacatecasAv.López Valverde 801ZacatecasZacatecasC.P.98060México Instituto de Investigaciones Metalúrgicas IIMMUniversidad Michoacana de San Nicolás de HidalgoEdificio‘‘U-5’’Ciudad UniversitariaMoreliaMichoacánC.P.58030México

The corrosion and tribocorrosion behavior of Ti6Al4V/xTiN(x=0,5,10 and 15,vol.%)composites fabricated by solid-state sintering and their relationship with the microstructure and microhardness were *** body conditions such as a temperature of 37℃ and a simulated body fluid were *** main results demonstrated a microstructural change caused by theα-Ti stabilization due to solid-solution of nitrogen(N)into the titanium(Ti)lattice,producing a maximum hardening effect up to 109%for the Ti64 matrix by using 15 vol.%*** potentials of composites changed to more noble values with the TiN particle addition,while corrosion current density of samples increased as an effect of the remaining porosity,decreasing the corrosion resistance of ***,changes to a less passive behavior were observed for samples with 15 vol.%*** non-passive behavior of composites resulted in the reduction of the potential drops during rubbing in tribocorrosion ***,an improvement of up to 88%of the wear rate of composites was seen from the solid-solution *** results allowed to understand the relationship between composition and sintering parameters with the improved tribocorrosion performance of materials.

关键词： Ti64 alloy composites powder metallurgy microstructure corrosion tribocorrosion