Corrosion Behavior in Hank's Solution of a Magnesium–Hydroxyapatite Composite Processed by High‐Pressure Torsion

Lopes, Débora de Oliveira; Soares, Renata Braga; Castro, Mirian Cabral Moreira de; Figueiredo, Roberto B.; Langdon, Terence G.; Lins, Vanessa de Freitas Cunha

doi:10.1002/adem.202000765

Cited by 10 publications

(7 citation statements)

References 29 publications

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“…The composite exhibited enhanced hardness and ultimate tensile strength in comparison to pure Mg process by HPT. The corrosion evolution behavior of the Mg-5%HA reported by Lopes et al [52] seems to be slower Particles used as starting materials to produce Mg-based composites at room temperature using high-pressure torsion [50]. [50] MDPI-open access.…”

Section: Severe Plastic Deformationmentioning

confidence: 92%

“…In the Mg-5%HA composite [52] the addition of HA enhanced the corrosion resistance after 10 hours of immersion in HBSS, the impedance increases and the mass loss rate decreases in the composite. The composite exhibited enhanced hardness and ultimate tensile strength in comparison to pure Mg process by HPT.…”

Section: Severe Plastic Deformationmentioning

confidence: 97%

“…High-pressure torsion was also used to fabricate Mg-based bioactive composites, but at room temperature [50,52]. The matrix where composed by commercially pure Mg or the AZ91 alloy, and the selected reinforcement were bioactive glass or hydroxyapatite.…”

Section: Severe Plastic Deformationmentioning

confidence: 99%

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Mg-Based Composites for Biomedical Applications

Castro¹,

Lopes²,

Dias³

2022

Magnesium Alloys Structure and Properties

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Magnesium (Mg) is a promising material for producing temporary orthopedic implants, since it is a biodegradable and biocompatible metal which density is very similar to that of the bones. Another benefit is the small strength mismatch when compared to other biocompatible metals, what alleviates stress-shielding effects between bone and the implant. To take advantage of the best materials properties, it is possible to combine magnesium with bioactive ceramics and tailor composites for medical applications with improved biocompatibility, controllable degradation rates and the necessary mechanical properties. To properly insert bioactive reinforcement into the metallic matrix, the fabrication of these composites usually involves at least one high temperature step, as casting or sintering. Yet, recent papers report the development of Mg-based composites at room temperature using severe plastic deformation. This chapter goes through the available data over the development of Mg-composites reinforced with bioactive ceramics, presenting the latest findings on the topic. This overview aims to identify the major influence of the processing route on matrix refinement and reinforcement dispersion, which are critical parameters to determine mechanical and corrosion properties of biodegradable Mg-based composites.

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Section: Severe Plastic Deformationmentioning

confidence: 92%

Section: Severe Plastic Deformationmentioning

confidence: 97%

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Mg-Based Composites for Biomedical Applications

Castro¹,

Lopes²,

Dias³

2022

Magnesium Alloys Structure and Properties

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“…It is also possible to incorporate hard ceramic particles into a magnesium matrix through HPT, and this provides the opportunity to produce magnesium composites with bioactive particles. Recent papers reported the incorporation of bioactive glass [ 120 ] and hydroxyapatite [ 120 , 121 ] into the magnesium matrix. Cytotoxicity tests showed the Mg–HA composite is biocompatible [ 120 ].…”

Section: Magnesium Compositesmentioning

confidence: 99%

An Overview on the Effect of Severe Plastic Deformation on the Performance of Magnesium for Biomedical Applications

et al. 2023

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There has been a great interest in evaluating the potential of severe plastic deformation (SPD) to improve the performance of magnesium for biological applications. However, different properties and trends, including some contradictions, have been reported. The present study critically reviews the structural features, mechanical properties, corrosion behavior and biological response of magnesium and its alloys processed by SPD, with an emphasis on equal-channel angular pressing (ECAP) and high-pressure torsion (HPT). The unique mechanism of grain refinement in magnesium processed via ECAP causes a large scatter in the final structure, and these microstructural differences can affect the properties and produce difficulties in establishing trends. However, the recent advances in ECAP processing and the increased availability of data from samples produced via HPT clarify that grain refinement can indeed improve the mechanical properties and corrosion resistance without compromising the biological response. It is shown that processing via SPD has great potential for improving the performance of magnesium for biological applications.

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“…Moreover, HAP plays an unmatchable role in the regeneration of human bones [17]. Recent studies indicated that Mg-HAP composites or Mg alloys with HAP coatings are promising candidates for orthopedic implant applications in terms of those mechanical properties and corrosion resistance [18,19].…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties and Corrosion Resistance of Magnesium–Hydroxyapatite Composites Fabricated by Spark Plasma Sintering

Nakahata

Tsutsumi

Kobayashi

2020

Metals

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Recent studies indicate that biodegradable magnesium alloys and composites are attracting a great deal of attention in orthopedic applications. In this study, magnesium–hydroxyapatite (Mg–HAP) composites with different compositions and grain size were fabricated by a spark plasma sintering (SPS) method. Their mechanical properties and corrosion behavior in a pseudo-physiological environment were investigated by pH measurements and inductivity coupled plasma (ICP) elemental analysis after an immersion test using Hanks’ solution. The results clearly showed that the addition of HAP improved both the mechanical properties and corrosion resistance. The results also indicated that the finer grain size improved most of the properties that are needed in a material for an orthopedic implant. Furthermore, the authors reveal that there is a strong correlation between the compressive strength and the porosity. In order to achieve the same compressive strength as human bone using these fabrication conditions, it is revealed that the porosity should be lower than 1.9%.

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Corrosion Behavior in Hank's Solution of a Magnesium–Hydroxyapatite Composite Processed by High‐Pressure Torsion

Cited by 10 publications

References 29 publications

Mg-Based Composites for Biomedical Applications

Mg-Based Composites for Biomedical Applications

An Overview on the Effect of Severe Plastic Deformation on the Performance of Magnesium for Biomedical Applications

Mechanical Properties and Corrosion Resistance of Magnesium–Hydroxyapatite Composites Fabricated by Spark Plasma Sintering

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