Sintering Analysis of Porous Ti/xTa Alloys Fabricated from Elemental Powders
The present work is focused on developing Ti-xTa porous alloys processed by the space holder method and solid-state sintering. The volume fraction of Ta ranged between 20 and 30 wt.%. The sintering kinetics was evaluated by dilatometry tests. Sintered materials were characterized by SEM, XRD and com...
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MDPI AG
2022-09-01
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| Online Access: | https://www.mdpi.com/1996-1944/15/19/6548 |
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| author | Rogelio Macias Pedro Garnica-Gonzalez Luis Olmos Omar Jimenez Jorge Chavez Octavio Vazquez Francisco Alvarado-Hernandez Dante Arteaga |
| author_facet | Rogelio Macias Pedro Garnica-Gonzalez Luis Olmos Omar Jimenez Jorge Chavez Octavio Vazquez Francisco Alvarado-Hernandez Dante Arteaga |
| author_sort | Rogelio Macias |
| collection | DOAJ |
| description | The present work is focused on developing Ti-xTa porous alloys processed by the space holder method and solid-state sintering. The volume fraction of Ta ranged between 20 and 30 wt.%. The sintering kinetics was evaluated by dilatometry tests. Sintered materials were characterized by SEM, XRD and computed tomography. Porosity features and permeability were determined from 3D images, and their mechanical properties were evaluated from microhardness and compression tests. The sintering behavior and the final microstructure are driven by the Ta diffusion into the Ti, slowing down the densification and modifying the transition temperature of <i>α</i>-to-<i>β</i>. Due to <i>β</i>-stabilization, martensite <i>α′</i> was obtained after sintering. Mechanical properties are reduced because of the <i>β</i>-stabilization and pore addition, being predominantly the pore effect. Permeability depended on the pore characteristics, finding values close to the human bones. It was concluded that powder metallurgy generates highly TixTa alloys with a combination of <i>α</i>, <i>β</i> and <i>α′</i> Ti phases as well as remaining Ta particles that are beneficial to improve the biocompatibility and osseointegration of such materials. Being the Ti25Ta40salt alloy the most suitable for orthopedic implants because of its characteristics and properties. |
| first_indexed | 2024-03-09T21:32:40Z |
| format | Article |
| id | doaj.art-a93bcd2a8caa4ffdbc7fabb97c1edbda |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T21:32:40Z |
| publishDate | 2022-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-a93bcd2a8caa4ffdbc7fabb97c1edbda2023-11-23T20:52:36ZengMDPI AGMaterials1996-19442022-09-011519654810.3390/ma15196548Sintering Analysis of Porous Ti/xTa Alloys Fabricated from Elemental PowdersRogelio Macias0Pedro Garnica-Gonzalez1Luis Olmos2Omar Jimenez3Jorge Chavez4Octavio Vazquez5Francisco Alvarado-Hernandez6Dante Arteaga7Division de Estudios de Posgrado e Investigación, Tecnologico Nacional de Mexico/I.T. Morelia, Av. Tecnologico #1500, Colonia Lomas de Santiaguito, Morelia 58120, MexicoDivision de Estudios de Posgrado e Investigación, Tecnologico Nacional de Mexico/I.T. Morelia, Av. Tecnologico #1500, Colonia Lomas de Santiaguito, Morelia 58120, MexicoInstituto de Investigaciones en Ciencias de la Tierra, Universidad Michoacana de San Nicolas de Hidalgo, Morelia 58060, MexicoDepartamento de Ingenieria de Proyectos, Universidad de Guadalajara, Zapopan 45100, MexicoDepartamento de Ingeniería Mecánica Eléctrica, CUCEI, Universidad de Guadalajara, Blvd. Marcelino García Barragán #1421, Guadalajara 44430, MexicoDivision de Estudios de Posgrado e Investigación, Tecnologico Nacional de Mexico/I.T. Morelia, Av. Tecnologico #1500, Colonia Lomas de Santiaguito, Morelia 58120, MexicoUnidad Academica de Ingenieria I, Universidad Autonoma de Zacatecas, Zacatecas 98000, MexicoCentro de Geociencias, Universidad Nacional Autónoma de Mexico, Blvd. Juriquilla No. 3001, Queretaro 76230, MexicoThe present work is focused on developing Ti-xTa porous alloys processed by the space holder method and solid-state sintering. The volume fraction of Ta ranged between 20 and 30 wt.%. The sintering kinetics was evaluated by dilatometry tests. Sintered materials were characterized by SEM, XRD and computed tomography. Porosity features and permeability were determined from 3D images, and their mechanical properties were evaluated from microhardness and compression tests. The sintering behavior and the final microstructure are driven by the Ta diffusion into the Ti, slowing down the densification and modifying the transition temperature of <i>α</i>-to-<i>β</i>. Due to <i>β</i>-stabilization, martensite <i>α′</i> was obtained after sintering. Mechanical properties are reduced because of the <i>β</i>-stabilization and pore addition, being predominantly the pore effect. Permeability depended on the pore characteristics, finding values close to the human bones. It was concluded that powder metallurgy generates highly TixTa alloys with a combination of <i>α</i>, <i>β</i> and <i>α′</i> Ti phases as well as remaining Ta particles that are beneficial to improve the biocompatibility and osseointegration of such materials. Being the Ti25Ta40salt alloy the most suitable for orthopedic implants because of its characteristics and properties.https://www.mdpi.com/1996-1944/15/19/6548sinteringmicrostructureTi-based compositesporousmicrotomography |
| spellingShingle | Rogelio Macias Pedro Garnica-Gonzalez Luis Olmos Omar Jimenez Jorge Chavez Octavio Vazquez Francisco Alvarado-Hernandez Dante Arteaga Sintering Analysis of Porous Ti/xTa Alloys Fabricated from Elemental Powders Materials sintering microstructure Ti-based composites porous microtomography |
| title | Sintering Analysis of Porous Ti/xTa Alloys Fabricated from Elemental Powders |
| title_full | Sintering Analysis of Porous Ti/xTa Alloys Fabricated from Elemental Powders |
| title_fullStr | Sintering Analysis of Porous Ti/xTa Alloys Fabricated from Elemental Powders |
| title_full_unstemmed | Sintering Analysis of Porous Ti/xTa Alloys Fabricated from Elemental Powders |
| title_short | Sintering Analysis of Porous Ti/xTa Alloys Fabricated from Elemental Powders |
| title_sort | sintering analysis of porous ti xta alloys fabricated from elemental powders |
| topic | sintering microstructure Ti-based composites porous microtomography |
| url | https://www.mdpi.com/1996-1944/15/19/6548 |
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