Influence of Ca and Zn on the microstructure and corrosion of biodegradable Mg–Ca–Zn alloys

Zander, Daniela; Zumdick, Naemi Aimée

doi:10.1016/j.corsci.2015.01.027

Cited by 197 publications

(95 citation statements)

References 60 publications

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“…The integrity of the protective layer is retained during growth and acts as a barrier for ions coming from the solution and favors corrosion resistance. [40,41] However, once the layer failure is initiated, the cracks increase the OH À ion diffusivity across the layer and accelerate the corrosion rate.…”

Section: E Effect Of Ha Content On Corrosion Behaviormentioning

confidence: 99%

Enhanced Mechanical Properties and Corrosion Behavior of Biodegradable Mg-Zn/HA Composite

Salleh

Hussain

Ramakrishnan

et al. 2017

Metall Mater Trans A

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Magnesium (Mg) and its alloys have shown potential for use in the biomedical industry due to their excellent biological performance and biodegradability in the bioenvironment. Thus, the aim of the present study was to develop a reliable biodegradable hard tissue substituent. Biodegradable and bioactive Mg-Zinc (Zn) reinforced by hydroxyapatite (HA) composite was prepared using mechanically alloyed Mg-6.5 wt pct Zn and pure HA powders as starting materials. Various HA contents (i.e., 5, 10, 15, and 20 wt pct) were introduced in forming the Mg-Zn/HA composite. The effect of bioactive HA incorporation in biodegradable Mg-6.5 wt pct Zn alloy matrix on mechanical and biodegradation properties as well as microstructural observation was investigated. As measured by the Williamson-Hall formula, the Mg crystallite size of the sintered composites containing 5, 10, 15, and 20 wt pct HA were 36.76, 29.08, 27.93, and 27.31 nm, respectively. According to X-ray diffraction (XRD) analysis, there was no new crystalline phase formed during milling, indicating that no mechanochemical reactions between Mg-Zn alloy and HA occurred. The À1.70 V shifted significantly toward the passive position of the plain Mg-6.5 wt pct Zn alloy and Mg-Zn/10 wt pct HA composite, which were À1.50 and À1.46 V, respectively, indicating that the Mg-Zn/10 wt pct HA composite was least susceptible to corrosion in the bioenvironment.

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Section: E Effect Of Ha Content On Corrosion Behaviormentioning

confidence: 99%

Enhanced Mechanical Properties and Corrosion Behavior of Biodegradable Mg-Zn/HA Composite

Salleh

Hussain

Ramakrishnan

et al. 2017

Metall Mater Trans A

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“…The Mg-Zn-Ca alloys belong to the prospective metallic biomaterials due to their biocompatibility, biodegradability [1,2] and the Young's modulus of the alloys being close to that of bones [3]. A low amount of alloying elements reduces production costs, and thus increases economic efficiency.…”

Section: Introductionmentioning

confidence: 99%

Grain Size-Related Strengthening and Softening of a Precompressed and Heat-Treated Mg–Zn–Ca Alloy

et al. 2020

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The impact of precompression, thermal treatment and its combination on the deformation behaviour of an extruded Mg–Zn–Ca (ZX10) alloy was studied with respect to a varied average grain size. The Hall–Petch plot was used to highlight the impact in a wide grain size interval. The initial texture of the wrought alloy was characterized by X-ray diffraction. Moreover, the evolution of microstructure and texture was provided by the electron backscatter diffraction (EBSD) technique. The obtained results indicate the strong contribution of deformation-thermal treatment on the resulting deformation behaviour. Particularly, after precompression and heat treatment, higher strengthening effect was observed in the reversed tensile loaded compared to compressed samples without any change in the Hall–Petch slope throughout the grain size interval. Unlike this strengthening effect, a reversed tension–compression yield asymmetry with higher strength values in compression has been obtained.

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“…Mg shows poorer corrosion resistance in Clcontaining environments. As a result, Mg alloys could be developed as a biodegradable metal, with their fast corrosion rate in physiologic environment [1][2][3][4][5][6][7].…”

mentioning

confidence: 99%

“…It is essential to control corrosion rate and to improve strength of the Mg. Oxides or hydroxides that formed during degradation enhance activity of osteoblast during bone regeneration [1][2][3]. Mg alloys indicate close elastic modulus to bone compared with Ti alloys, better ductility than hydroxyapatite, and higher strength than polymers.…”

mentioning

confidence: 99%

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Production and Precipitation Hardening of Mg-Ca-Zn-Co Alloy for Tissue Engineering

Mutlu

2017

Magnesium Research

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In this study, Mg-Ca-Zn-Co alloy specimens for biomedical applications were produced by the powder metallurgy method. The Mg-Ca-Zn-Co alloy could be used as a scaffold material in tissue engineering applications. Electrochemical corrosion behavior of the specimens was investigated in simulated body fluid environment. Electrochemical corrosion resistance of the specimens was increased with increasing Zn and Ca contents of the alloy up to an optimum composition and then decreased. Optimum values for Ca and Zn additions were about 0.7 wt.% and 3.0 wt.% respectively. Young's modulus values of the specimens were determined by nondestructive ultrasonic measurement. Alloying element addition increased the Young's modulus of the specimens. Precipitation hardening of the Mg-Ca-Zn-Co alloy increased the Young's modulus and the corrosion rate of the specimens.

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Influence of Ca and Zn on the microstructure and corrosion of biodegradable Mg–Ca–Zn alloys

Cited by 197 publications

References 60 publications

Enhanced Mechanical Properties and Corrosion Behavior of Biodegradable Mg-Zn/HA Composite

Enhanced Mechanical Properties and Corrosion Behavior of Biodegradable Mg-Zn/HA Composite

Grain Size-Related Strengthening and Softening of a Precompressed and Heat-Treated Mg–Zn–Ca Alloy

Production and Precipitation Hardening of Mg-Ca-Zn-Co Alloy for Tissue Engineering

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