Microstructural and mechanical properties of biodegradable iron foam prepared by powder metallurgy

Čapek, Jaroslav; Vojtěch, Dalibor; Oborná, Adéla

doi:10.1016/j.matdes.2015.06.022

Cited by 73 publications

(54 citation statements)

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“…Magnesium, iron and zinc are considered as biodegradable metals. However, among the available studies on biodegradable systems, the majority of the investigations have been on magnesium based materials due to their non-toxicity and similar mechanical behavior to that of human bone [7]. There have been controversies over biocompatibility of iron due to the emergence of metallosis, local destruction of tissues as a result of mechanical-biological, electro-energetic, and chemical-toxic effects of metal after implantation, of iron implants [8].…”

Section: Introductionmentioning

confidence: 99%

“…Nevertheless, there exist studies that show iron-based materials are possibly suitable for temporary biodegradable implants [9,10]. They provide answers to the two major drawbacks of magnesium-based materials which are high degradation rate that limits the use of such materials on small implants with approximate life span of 6-12 months, and hydrogen evolution during corrosion that can disturb the healing process [7,[11][12][13]. Mechanical properties of iron-based alloys, e.g., strength and ductility, can be easily tailored to meet the criteria for some biomedical applications.…”

Section: Introductionmentioning

confidence: 99%

“…Mechanical properties of iron-based alloys, e.g., strength and ductility, can be easily tailored to meet the criteria for some biomedical applications. They are viewed as good candidates for load bearing biodegradable implants owing to their high mechanical properties, e.g., high strength [13], and biocompatible, non-toxic characteristics [7]. However, a major challenge of using iron as a biodegradable implant is its slow rate of degradation [7,14].…”

Section: Introductionmentioning

confidence: 99%

“…They are viewed as good candidates for load bearing biodegradable implants owing to their high mechanical properties, e.g., high strength [13], and biocompatible, non-toxic characteristics [7]. However, a major challenge of using iron as a biodegradable implant is its slow rate of degradation [7,14]. Different approaches have been proposed to improve the corrosion rate of iron such as alloying elements modification, poly(lactic-co-glycolic acid) infiltration, and coating [6,[15][16][17].…”

Section: Introductionmentioning

confidence: 99%

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Investigation on Mechanical Behavior of Biodegradable Iron Foams under Different Compression Test Conditions

Alavi

Trenggono

Champagne

et al. 2017

Metals

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Biodegradable metal foams have been studied as potential materials for bone scaffolds. Their mechanical properties largely depend on the relative density and micro-structural geometry. In this work, mechanical behavior of iron foams with different cell sizes was investigated under various compression tests in dry and wet conditions and after subjected to degradation in Hanks' solution. Statistical analysis was performed using hypothesis and non-parametric tests. The deformation behavior of the foams under compression was also evaluated. Results show that the mechanical properties of the foams under dry compression tests had a "V-type" variation, which is explained as a function of different geometrical properties by using a simple tabular method. The wet environment did not change the compression behavior of the iron foams significantly while degradation decreased the elastic modulus, yield and compression strengths and the energy absorbability of the specimens. The deformation of open cell iron foams under compression is viewed as a complex phenomenon which could be the product of multiple mechanism such as bending, buckling and torsion.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Investigation on Mechanical Behavior of Biodegradable Iron Foams under Different Compression Test Conditions

Alavi

Trenggono

Champagne

et al. 2017

Metals

View full text Add to dashboard Cite

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“…In this manner, the electrical, thermal and mechanical aspects have to be considered simultaneously [13]. SMAs are intermetallic compounds able to recover, in a continuous and reversible way, a previously defined shape when subjected to an appropriate thermomechanical load [14][15][16]. From a microscopic point of view, this transformation consists in a transition from a crystallographic stable phase at low temperature (e.g.. martensite) to a different crystallographic stable phase at high temperature (e.g.…”

Section: Introductionmentioning

confidence: 99%

An Innovative Shape Memory Actuator

Cappellini

Amici

2016

MATEC Web of Conferences

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Abstract. The work describes a NiTi linear actuator. This material is able to realize a contraction with heating produced through Joule effect. Then a cooling of the active device is realized with forced air. Finally the lengthening is realized with another active element. The particular structure of the geometry allows for an increment of reliability, because the electrical connections are mechanically stabilized and the active elements are compelled to avoid undesired electrical contacts through an insulated cylindrical core.

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Iron and Nickel Cellular Structures by Sintering of 3D‐Printed Oxide or Metallic Particle Inks

et al. 2016

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Inks comprised of metallic Fe or Ni powders, an elastomeric binder, and graded volatility solvents are 3D-printed via syringe extrusion and sintered to form metallic cellular structures. Similar structures are created from Fe 2 O 3 and NiO particle-based inks, with an additional hydrogen reduction step before sintering. All sintered structures exhibit 92-98% relative density within their struts, with neither cracking nor visible warping despite extensive volumetric shrinkage (%70-80%) associated with reduction (for oxide powders) and sintering (for both metal and oxide powders). The cellular architectures, with overall relative densities of 32-49%, exhibit low stiffness (1-6 GPa, due to the particular architecture used), high strength (4-31 MPa), and high ductility, leading to excellent elastic and plastic energy absorption, when subjected to uniaxial compression. IntroductionCellular materials exhibit numerous advantages over dense materials due to their high specific stiffness, strength, damping, energy absorption, and surface areas. [1][2][3][4] Both iron and nickel, pure or alloyed, have potential uses in cellular architectures for energy storage, [2,[5][6][7] emissions control, [2] catalyst supports, [1,8] and structural applications. [1,3,4,[8][9][10] The micro-architectures of ordered, periodic cellular materials such as scaffolds, honeycombs, lattices, and trusses can be optimized to provide additional improvement on these properties over randomly oriented cellular architectures. [8,[11][12][13] However, the widespread commercial and industrial adoption of cellular metal structures has been hindered by the fact that they are difficult and/or costly to manufacture at sufficient scales and rates relative to traditional metallic structures fabricated using long-established manufacturing methods such as casting. This is especially true for high-melting metals such as Fe and Ni which, unlike Al, are difficult to foam in the liquid state.We recently introduced a versatile and simple process for the additive manufacturing of cellular, metallic architectures, where a liquid ink, consisting of a suspension of metal oxide or metal particles, is first 3D-printed into a structure, and this structure is then subjected to sintering, with an intermediate thermochemical reduction step if oxides are used. [14] A similar direct ink writing approach has been used to produce reticulated sheets of TiH 2 that were then rolled or folded into scrolls or origami shapes [15,16] and Ti-6Al-4V scaffolds for bone implants. [17][18][19] Unlike established metal additive manufacturing methods (e.g., selective laser sintering or electron-beam sintering or melting [20] ), our extrusion-based method can be utilized to 3D-print complex architectures comprised of many layers from an extensive range of materials (e.g., ceramics, metals, biologics) with no required drying time and with a single 3D-printer at room temperature. [14,21] In our previous work, we 3D-printed, reduced,[*] Prof.

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Microstructural and mechanical properties of biodegradable iron foam prepared by powder metallurgy

Cited by 73 publications

References 50 publications

Investigation on Mechanical Behavior of Biodegradable Iron Foams under Different Compression Test Conditions

Investigation on Mechanical Behavior of Biodegradable Iron Foams under Different Compression Test Conditions

An Innovative Shape Memory Actuator

Iron and Nickel Cellular Structures by Sintering of 3D‐Printed Oxide or Metallic Particle Inks

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