The influence of flow rates on the dynamic degradation behaviour of porous magnesium under a simulated environment of human cancellous bone

Saad, Amir Putra Md; Rahim, Rabiatul Adibah Abdul; Harun, Muhamad Noor; Basri, Hasan; Abdullah, Jaafar; Kadir, Mohammed Rafiq Abdul; Syahrom, Ardiyansyah

doi:10.1016/j.matdes.2017.03.029

Cited by 36 publications

(14 citation statements)

References 59 publications

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“…Larger diameter pores expose deeper parts of the solid matrix to the environment, causing the sufficient surface temperature to rise. The maximum efficiency was found at an intermediate point of the flame stability range (250 kW/m² ) [54,55].…”

Section: Methodsmentioning

confidence: 98%

Experimental Assessment of Thermal Radiation Behavior Emitted by Solid Porous Material

Caetano¹,

Lorenzini²,

Lhamby³

et al. 2020

IJHT

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Porous media burners have been the focus of many studies due to the advantage in different applications in industry, which exhibit a directional emission of thermal radiation and low emission of pollutants. Indeed, these characteristics yields benefits regarding productivity by an environment friendly process. Thus, this work analyzes the behavior of radiation heat flux emitted by materials of different linear densities and porosities, varying the rate of air/fuel mixture and the flame power. In this way, was constructed an experimental setup that consists in a supply system of air/fuel, data acquisition, burner support for the radiation sensor, and the radiometer. This structure enables the displacement from 0°C to 90°C allowing the analysis of radiation in the area of a semisphere. The results shown that the silicon carbide has higher radiation efficiency than zirconia, due the higher thermal conductivity and emissivity. However, the silicon carbide degraded in one of the measurements. The ZrO2 media has proved challenging to stabilize for equivalence ratios below 0.6. Regarding the porosity, it is concluded that the higher the porosity, the greater the radiation efficiency, the expected result because there is a larger contact area for the reaction to occur within the pores.

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Section: Methodsmentioning

confidence: 98%

Experimental Assessment of Thermal Radiation Behavior Emitted by Solid Porous Material

Caetano¹,

Lorenzini²,

Lhamby³

et al. 2020

IJHT

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“…2H2O + 2e − → H2 + 2OH − (5) O2 + 4H + + 4e − → 2H2O (6) The above reactions greatly increased the local pH and Fe 2+ concentration at the solution/sample interface. The DCPD and CFP readily precipitated under the selected coating condition when their solubility limit was exceeded as the local pH increased (Fig.…”

Section: I) Cap Conversion Coating Processmentioning

confidence: 99%

“…II) Ag/CaP-c coating process: When compared with Ca 2+ , Ag + has much higher reactivity with H2PO4 − in the coating solution, so only 0.2 to 0.5 mmol/dm 3 Ag + was added during the preparation of the coating solution for the Ag/CaP-c coating. During the process, Ag + could be reduced together with the above cathodic reactions (5,6) and react with the H2PO4 − as the local pH increased:…”

Section: Ca 2+ + H2po4 − + Oh − + H2o → Cahpo4•2h2o (7) Ca 2+ + 2fe 2mentioning

confidence: 99%

“…for hard tissue applications, could not be achieved. In view of offering higher structural strength and ductility than polymers, absorbable metals, mainly magnesium alloys, were recently proposed as new bone scaffold materials [6][7][8]. Its porous structure was proven to play an important role in cell growth and proliferation due to the higher surface contact area and interconnectivity within the pores that lead to the greater cell spreading [2,9,10].…”

Section: Introductionmentioning

confidence: 99%

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Development and characterization of silver containing calcium phosphate coatings on pure iron foam intended for bone scaffold applications

Champagne

Trenggono

et al. 2018

Materials & Design

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Despite its high structural strength and degradability, the potentiality of pure iron foam for bone scaffolds is low due to its lack of surface bioactivity. This work aims to provide a surface bioactivity to the iron foam by developing a calcium phosphate (CaP) conversion coating. Silver (Ag), known for its antibacterial property, was then incorporated onto the CaP coating via co-deposition (Ag/CaP-c) and post-treatment (Ag/CaP-p). By tuning the Ca/P ion ratio and Ag concentration during the coating process, an optimum coating parameter was obtained. All coatings were found to enhance mineralization ability and mechanical integrity of the iron foam over time. Electrochemical and immersion tests indicated that the coatings regulated the degradation rate of the iron foam via a variation of coating resistance and capacitance. Silver ions were released slowly from the Ag/CaP coating during the immersion test indicating a potential long-term antibacterial property of the coating. Details on the coating design and process optimization, the effects of three different simulated physiological solutions, and the mechanical property of the coated iron foam are discussed in this report.

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“…Calcium is one of the most attractive elements due to the fact that it is a major component of human bones and essential in chemical signaling with cells. Moreover, magnesium is necessary for the calcium incorporation into the bone, which might be expected to be beneficial to the bone healing with the co-releasing of Mg and Ca ions [6].…”

Section: Introductionmentioning

confidence: 99%

Preparation and Corrosion Resistance of Biodegradable PDLLA-Mg-1.0Ca-ZnP Composite Material

Huang¹,

Shuiwen²

2017

Proceedings of the 7th International Conference on Education, Management, Information and Computer Science (ICEMC 2017)

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Abstract.Objective: Preparation of the novel material for bone repair. Methods: PDLLA coating method was used. Results: The PDLLA-Mg-1.0Ca-ZnP composite material was prepared by using both PDLLA coating and the phosphate coating (recorded ZnP), and the corrosion resistance of PDLLA-Mg-1.0Ca-ZnP were tested. Conclusion: Electrochemical tests showed that PDLLA-AZ31 had higher free corrosion potentials (Ecorr) and lower corrosion currents (Icorr), high impedence in the simulated body fluid (SBF) at 37℃.

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The influence of flow rates on the dynamic degradation behaviour of porous magnesium under a simulated environment of human cancellous bone

Cited by 36 publications

References 59 publications

Experimental Assessment of Thermal Radiation Behavior Emitted by Solid Porous Material

Experimental Assessment of Thermal Radiation Behavior Emitted by Solid Porous Material

Development and characterization of silver containing calcium phosphate coatings on pure iron foam intended for bone scaffold applications

Preparation and Corrosion Resistance of Biodegradable PDLLA-Mg-1.0Ca-ZnP Composite Material

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