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Corrosion and tribocorrosion behavior of ti6Al4V/xtiN composites for biomedical applications

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

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Multifunctional hopeite nanocoating on ti64 substrates by pulsed laser deposition and radio frequency magnetron sputtering for orthopedic implant applications:A comparative study

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Journal of Central South University 2020年第8期27卷 2198-2209页

作者： Ashish DAS Mukul SHUKLA Department of Mechanical Engineering Motilal Nehru National Institute of TechnologyAllahabad 211004India Department of Production and Industrial Engineering National Institute of TechnologyJamshedpur 831014India School of Mechanical and Aerospace Engineering Queen’s UniversityBelfast BT71NNUnited Kingdom Department of Mechanical Engineering Technology University of JohannesburgJohannesburg PO Box 524South Africa

Functionalized implants demonstrate an upgraded approach in orthopedic implants,aiming to achieve long term success through improved bio *** coatings with multifunctionality have arisen as an effective substitute for conventional coatings,owing to their combination of various properties that are essential for bio-implants,such as osteointegration and antibacterial *** the present study,thin hopeite coatings were produced by Pulsed laser deposition(PLD)and radio frequency magnetron sputtering(RFMS)on ti64 *** obtained hopeite coatings were annealed at 500°C in ambient air and studied in terms of surface morphology,phase composition,surface roughness,adhesion strength,antibacterial efficacy,apatite forming ability,and surface wettability by scanning electron microscope(SEM),X-ray diffraction(XRD),atomic force microscope(AFM),tensometer,fluorescence-activated cell sorting(FACS),simulated body fluid(SBF)immersion test and contact angle goniometer,***,based on promising results obtained in the present work it can be summarized that the new generation multifunctional hopeite coating synthesized by two alternative new process routes of PLD and RFMS on ti64 substrates,provides effective alternatives to conventional coatings,largely attributed to strong osteointegration and antibacterial character of deposited hopeite coating ensuring the overall stability of metallic orthopedic implants.

关键词： hopeite ti64 alloy pulsed laser deposition magnetron sputtering coating implant

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