Development of porous titanium for biomedical applications: A comparison between loose sintering and space-holder techniques

Torres, Yadir; Lascano, Sheila; Bris, Jorge; Pavón, Juan José; Rodríguez, José Antonio

doi:10.1016/j.msec.2013.11.036

Cited by 124 publications

(83 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The upper limit in this work is higher than that reported in the literature by Torres et al [7] (85% porosity). Typical cell structures for the porous samples produced by CDS processes can be observed in Fig.…”

Section: Porous Structurescontrasting

confidence: 65%

“…Recent studies on processing and property optimisation using the sintering and dissolution process are reported which identify that limitations to the sintering and dissolution process still exist. For example, Hangai et al [5], Giliani et al [6] have demonstrated porosity is limited in 68-70%, and 85% porosity is demonstrated by Torres et al [7]. Michailidis complete removal of the space holder (NaCl) from the aluminium structures, which also has negative consequences on the corrosion behaviour, as shown by Hangai et al [9].…”

Section: Introductionmentioning

confidence: 97%

See 1 more Smart Citation

Production Process and Properties of a Highly Porous Al Alloy Made Using NaCl Droplets as a Space Holder

Covaciu

Kennedy

2015

Acta Metall. Sin. (Engl. Lett.)

View full text Add to dashboard Cite

Porous Al structures have been made using a porogen leaching method but with additional novel steps. In this way, Al-0.25Cu-0.6Si-1.0Mg alloys with interconnected, open cells have been made, with high levels of porosity (up to 89%). The use of 4 to 5 mm diameter sodium chloride droplets combined with interspersion of the metal powder and droplets in the die and dissolution of the salt before sintering was found to enable easier interspersion of the two components, resulting in good connectivity of the beads via the formation of ''windows'' between the pores, and rapid elimination of salt from the structure. Porous Al with densities in the range of 0.28-0.86 g/cm 3 exhibited compressive yield strengths in the range of 0.14 to 7.5 MPa, with no difference being observed between the samples made by this route and by more conventional dissolution of the salt after sintering. These novel steps widen the possibility for porous metal manufacture to other materials, not limited by the need to have a sintering temperature below that for the melting point of salt.

show abstract

Section: Porous Structurescontrasting

confidence: 65%

Section: Introductionmentioning

confidence: 97%

Production Process and Properties of a Highly Porous Al Alloy Made Using NaCl Droplets as a Space Holder

Covaciu

Kennedy

2015

Acta Metall. Sin. (Engl. Lett.)

View full text Add to dashboard Cite

show abstract

Section: Introductionunclassified

“…The architecture of these materials must allow adhesion, nucleation, growth, proliferation and transport of living cells for tissue regeneration [3]. Hence, it is exhibited the importance of getting porous scaffolds [4]. In the present work, titanium was obtained with different levels of porosity (metal sponges), in order to locate an average convenient pore size.…”

Section: Introductionmentioning

confidence: 99%

“…La arquitectura de estos materiales debe permitir la adhesión, nucleación, crecimiento, proliferación y transporte de células vivas para la regeneración del tejido [3]. Lo anterior muestra la creciente importancia de conseguir andamios porosos [4].En el presente trabajo se obtuvo titanio con diferentes niveles de porosidad (esponjas metálicas), con la finalidad de generar un tamaño promedio de poro conveniente.La síntesis de las esponjas metálicas se llevó a cabo mediante sinterizado por corriente pulsada asistida, utilizando un espaciador. El contenido del espaciador modifica el gradiente de temperatura durante la síntesis; sin embargo, se observó que las características morfológicas y cristalinas del material no se modificaron.…”

unclassified

See 1 more Smart Citation

Caracterización de compositos biocerámicos en esponjas de titanio mediante interpenetración por corriente pulsada asistida

2018

View full text Add to dashboard Cite

RESUMENActualmente, se están llevando a cabo una gran cantidad de estudios sobre el desarrollo tecnológico de los procesos de manufactura para soportes (andamios) de ingeniería de tejidos humanos [1]. La impresión 3D aplicada a la ingeniería de tejidos requiere del desarrollo de técnicas computacionales como el modelado estereolitográfico y de procesos de manufactura especiales como son el sinterizado por láser o la deposición por extrusión, por mencionar sólo algunos [2]. A pesar de los avances, sus aplicaciones se han visto limitadas debido a las características y propiedades de los materiales usados, ya que éstos deben cumplir con la condición de ser biomateriales. Por otra parte, los sustratos para ingeniería de tejidos deben mimetizar, en lo posible, las características del tejido donde se va a aplicar, tanto en sus características biológicas como mecánicas. La arquitectura de estos materiales debe permitir la adhesión, nucleación, crecimiento, proliferación y transporte de células vivas para la regeneración del tejido [3]. Lo anterior muestra la creciente importancia de conseguir andamios porosos [4].En el presente trabajo se obtuvo titanio con diferentes niveles de porosidad (esponjas metálicas), con la finalidad de generar un tamaño promedio de poro conveniente.La síntesis de las esponjas metálicas se llevó a cabo mediante sinterizado por corriente pulsada asistida, utilizando un espaciador. El contenido del espaciador modifica el gradiente de temperatura durante la síntesis; sin embargo, se observó que las características morfológicas y cristalinas del material no se modificaron. Durante el estudio, las condiciones durante el sinterizado se mantuvieron constantes y reproducibles. Las propiedades y composición de los materiales obtenidos fueron analizadas y comparadas con las de los materiales base. Los resultados obtenidos sugieren que este material podría ser usado exitosamente en la aplicación clínica.Palabras clave: biomaterial, esponja de titanio, sinterizado. ABSTRACTRecently, it has been directing some special attention to the development of new manufacturing processes, with engineering applications in human tissues [1]. 3D printing applied to tissue engineering requires pulse computational techniques such as stereolithographic modeling, and special manufacturing processes, to name a few; Laser Sintering or Extrusion Deposition [2]. Despite the advances, applications have been limited due to the characteristics and properties of the materials used, so they must meet the biomaterial conditions. On the other hand, biomimicry of materials should be biologically and mechanically imitated when possible on the aim and surrounding tissue. The architecture of these materials must allow adhesion, nucleation, growth, proliferation and transport of living cells for tissue regeneration [3]. Hence, it is exhibited the importance of getting porous scaffolds [4]. In the present work, titanium was obtained with different levels of porosity (metal sponges), in order to locate an average convenient pore size.

show abstract

A Method for Fabricating Stainless Steel Pellets with Open‐Cell Porosity by Alkaline Leaching of Silica Template

et al. 2016

View full text Add to dashboard Cite

In this paper, a method of fabricating metallic analogues of biological materials is presented.In particular, the structure of pre-pressed oilseed used for physical modeling of supercritical CO 2 extraction of desired substances is replicated in a material commonly used for manipulation of foods, i.e. food grade stainless steel (AISI 316L).Powder metallurgy approach is employed through sintering the steel powder with SiO 2 spacer and further leaching the porogen. The resulting metal framework has interconnected porosity and low apparent density (about 1.91 g/cm 3 ). The prospect of tuning the balance between porosity and interconnectivity of pores is of special concern to allow mimicking the structure of natural materials intended for supercritical CO 2 extraction. With this motivation, the effects of initial silica content (between 20 to 60 vol.%) and silica particle size (small: 0.5-10 µm, medium: 110 µm, and large: 170-630 µm) on the structural and mechanical properties of the porous material are studied. It is found that increasing porosity correlates with decreasing compressive strength, whereas the plateau region of the stress-strain relationship in compression is of lower slope and spans over larger strain. Yield strength ranges from 4.2 MPa to 220 MPa, which is sufficient for sustaining the conditions of supercritical extraction.

show abstract

Development of porous titanium for biomedical applications: A comparison between loose sintering and space-holder techniques

Cited by 124 publications

References 52 publications

Production Process and Properties of a Highly Porous Al Alloy Made Using NaCl Droplets as a Space Holder

Production Process and Properties of a Highly Porous Al Alloy Made Using NaCl Droplets as a Space Holder

Caracterización de compositos biocerámicos en esponjas de titanio mediante interpenetración por corriente pulsada asistida

A Method for Fabricating Stainless Steel Pellets with Open‐Cell Porosity by Alkaline Leaching of Silica Template

Contact Info

Product

Resources

About