Microstructure and mechanical properties of sintered porous magnesium using polymethyl methacrylate as the space holder

Bi, Yanze; Zheng, Yang; Li, Yan

doi:10.1016/j.matlet.2015.09.039

Cited by 37 publications

(17 citation statements)

References 24 publications

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“…1 shows the XRD patterns of pure Mg and ZK60 alloy, before and after immersion in AU at 37 °C for 5 days. Pure Mg is composed of a single α-Mg matrix phase with lattice parameters of a = 0.32089 nm and c = 0.52106 nm [30] , [31] . The α-Mg phase and MgZn 2 second phases can be detected in the ZK60 alloy sample [32] .…”

Section: Resultsmentioning

confidence: 99%

Biodegradation behavior of magnesium and ZK60 alloy in artificial urine and rat models

Zhang

et al. 2017

Bioactive Materials

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In this work, the biodegradable and histocompatibility properties of pure Mg and ZK60 alloy were investigated as new temporary implants for urinary applications. The corrosion mechanism in artificial urine was proposed using electrochemical impedance spectroscopy and potentiodynamic polarization tests. The corrosion potential of pure magnesium and ZK60 alloy were −1820 and −1561 mV, respectively, and the corrosion current densities were 59.66 ± 6.41 and 41.94 ± 0.53 μA cm−2, respectively. The in vitro degradation rates for pure Mg and ZK60 alloy in artificial urine were 0.382 and 1.023 mm/y, respectively, determined from immersion tests. The ZK60 alloy degraded faster than the pure Mg in both artificial urine and in rat bladders (the implants of both samples are ø 3 mm × 5 mm). Histocompatibility evaluations showed good histocompatibility for the pure Mg and ZK60 alloy during the 3 weeks post-implantation in rat bladders, and no harm was observed in the bladder, liver and kidney tissues. The results provide key information on the degradation properties and corrosion mechanism of pure Mg and ZK60 alloy in the urinary system.

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Section: Resultsmentioning

confidence: 99%

Biodegradation behavior of magnesium and ZK60 alloy in artificial urine and rat models

Zhang

et al. 2017

Bioactive Materials

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“…Sintering is a process of solid state connection of particles via diffusion. The advantage of this process is better control of composition throughout the whole body of prepared material and limited segregation of elements [13][14][15].…”

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confidence: 99%

Evolution of microstructure and electrochemical corrosion characteristics of cold compacted magnesium

Březina

Doležal

Krystýnová

et al. 2017

Koroze a Ochrana Materialu

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The main advantage of magnesium and its alloys is high specific strength and biocompatibility. A modern approach to magnesium-based materials preparation is powder metallurgy. This technique allows preparation of new materials with a unique structure, chemical composition, and controlled porosity. In this study, cold compaction of magnesium powder was studied. Magnesium powder of average particle size of 30 μm was compacted applying pressures of 100 MPa, 200 MPa, 300 MPa, 400 MPa and 500 MPa at laboratory temperature. Influence of compacting pressure was studied with microstructural and electrochemical corrosion characteristics analysis. The resulting microstructure was studied in terms of light and electron microscopy. Obtained electrochemical characteristics were compared with those of wrought magnesium. Compacting pressure had a significant influence on microstructure and electrochemical characteristics of prepared bulk magnesium. With the increase in compaction pressure, the porosity decreased. Compacting pressures of 300 MPa, 400 MPa and 500 MPa led to the similar microstructure of the prepared material. Polarization resistance of compacted magnesium was much lower and samples degraded faster when compared to wrought magnesium. Also, the corrosion degradation mechanism changed due to the microstructural differences between the material states.

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“…However, these efforts do not address the reactions between the oxygen in the scaffold and the metal hydrides, nor the poor thermal conductivity of the scaffolds employed. Mesoporous metal scaffolds (MMS) are a new type of materials that have been considered as an attractive solution for battery, fuel-cell and catalytic applications due to their robustness [49][50][51]. Only recently have such materials been synthesised as electrodes for battery applications [51].…”

Section: Libh4 → 2lih + 2b + 3h2mentioning

confidence: 99%

Novel synthesis of porous aluminium and its application in hydrogen storage

Sofianos

Sheppard

Ianni

et al. 2017

Journal of Alloys and Compounds

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A novel approach for confining LiBH4 within a porous aluminium scaffold was applied in order to enhance its hydrogen storage properties, relative to conventional techniques for confining complex hydrides. The porous aluminium scaffold was fabricated by sintering NaAlH4, which was in the form of a dense pellet, under dynamic vacuum. The final product was a porous aluminium scaffold with the Na and H2 having been removed from the initial pellet. This technique contributed to achieving highly dispersed LiBH4 particles that were also destabilised by the presence of the aluminium scaffold. In this study, the effectiveness of this novel fabrication method of confined/destabilised LiBH4 was extensively investigated, which aimed to simultaneously improve the hydrogen release at lower temperature and the kinetics of the system. These properties were compared with the properties of other confined LiBH4 samples found in the literature. As-synthesised samples were characterised using Scanning Electron Microscopy (SEM), X-ray Diffraction (XRD) and Nitrogen Adsorption measurements. The hydrogen storage capacity of all samples was analysed using temperature programmed desorption in order to provide a comprehensive survey of their hydrogen desorption properties. The porous aluminium scaffold has a wide pore size distribution with most of the porosity due to pores larger than 50 nm. Despite this the onset hydrogen desorption temperature (Tdes) of the LiBH4 infiltrated into the porous aluminiumscaffold was 200 °C lower than that of bulk LiBH4 and 100 °C lower than that of nanosized LiBH4. Partial cycling could be achieved below the melting point of LiBH4 but the kinetics of hydrogen release decreased with cycle number.

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Microstructure and mechanical properties of sintered porous magnesium using polymethyl methacrylate as the space holder

Cited by 37 publications

References 24 publications

Biodegradation behavior of magnesium and ZK60 alloy in artificial urine and rat models

Biodegradation behavior of magnesium and ZK60 alloy in artificial urine and rat models

Evolution of microstructure and electrochemical corrosion characteristics of cold compacted magnesium

Novel synthesis of porous aluminium and its application in hydrogen storage

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