Mg-Ca binary alloy sheets with Ca contents of ≤1 wt.% with high corrosion resistance and high toughness

Seong, Jin-Wook; Kim, Woo Jin

doi:10.1016/j.corsci.2015.05.068

Cited by 39 publications

(14 citation statements)

References 31 publications

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“…The research is conducted using a new Mg-1Ca alloy produced to enhance osseointegration by the introduction of calcium, which contributes to bone tissue formation during the implant biodegradation [6,12,13]. The improvement in mechanical properties, especially fatigue strength, for this alloy can be achieved by the grain refinement, e.g.…”

Section: Introductionmentioning

confidence: 99%

Influence of ultra-fine grain structure on corrosion behaviour of biodegradable Mg-1Ca alloy

et al. 2020

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Biodegradation studies of Mg-1Ca alloy with different microstructures in Ringer's solution reveal corrosion mechanism based on the balance between the anodic dissolution of the secondary phase and hydroxide precipitation, controlled by the secondary phase size and distribution uniformity. Alloy with ultrafine-grain structure shows at least 5-fold improvement in corrosion resistance compared to the coarse-grained alloy due to the separation of the particles of the secondary phase and its continuous intragranular nano-precipitation. This promotes an unusual low-frequency impedance behaviour described by an inductive loop with the negative time constant, which leads to the increased impedance modulus signifying the improved corrosion resistance.

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Section: Introductionmentioning

confidence: 99%

Influence of ultra-fine grain structure on corrosion behaviour of biodegradable Mg-1Ca alloy

et al. 2020

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“…Several studies recommended a different percentage of Ca addition to improving certain properties, i.e. Ca < 1% for better corrosion resistance [106], Ca–0.79% for improved hardness [108] and Ca–0.4% for improved ductility [109]. Rad et al [110] performed a similar study on the influence of calcium concentration (0.5, 1.25, 2.5, 5 and 10 wt-%) of Mg– x Ca alloy and reported a decrease in degradation rate and improvement in corrosion resistance for the Mg–0.5Ca alloy.…”

Section: Strengthening and Corrosion Prevention Methods Of Magnesium ...mentioning

confidence: 99%

Review of bioresorbable AZ91, AZ31 and Mg–Zn–Ca implants and their manufacturing methods

Ezhilmaran¹,

Anand

Kannan

et al. 2023

Materials Science and Technology

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In this paper, the magnesium alloys, such as AZ91, AZ31 and Mg–Zn–Ca are reviewed for the bioimplants application. A perspective of controlling the high degradation rate of Mg alloys is discussed by alloying, manufacturing methods, surface coating and surface treatment. The major constraint while using magnesium as an implant is the stress-shielding effect, which can be resolved by producing the Mg implant with Young's modulus closer to the cortical bones. The latest development for minimising the stress-shielding effect is by creating a porous magnesium scaffold although a change in fatigue resistance is unavoidable. The influence of manufacturing methods, such as die-casting, powder metallurgy, rolling and additive manufacturing is also discussed on the mechanical strength and degradation behaviour.

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“…Mg-Zn-Ca alloys exhibit an enhanced corrosion resistance and good strength properties [ 3 , 11 ]. For instance, a number of studies have shown that the addition of Zn in Mg-Ca alloys improves the corrosion resistance and increases hardness due to the formation of the Ca 2 Mg 6 Zn 3 ternary phase [ 12 , 13 , 14 , 15 , 16 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Microstructure Refinement on the Corrosion Behavior of the Bioresorbable Mg-1Zn-0.2Ca and Mg-1Ca Alloys

et al. 2022

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This paper presents a comprehensive study of the effect of the processing by high-pressure torsion (HPT) on the corrosion behavior in Ringer’s solution for two popular bioresorbable magnesium alloys—Mg-1Ca and Mg-1Zn-0.2Ca. Three states were studied for each alloy—the initial homogenized state, the as-HPT-processed state and the state after subsequent annealing at 250 and 300 °C. It is shown that HPT processing results in a very strong grain refinement in both alloys down to a mean grain size of about 210 nm for the Mg-1Ca alloy and 90 nm for the Mg-1Zn-0.2Ca alloy, but their corrosion resistance values differ significantly (by an order of magnitude). The conducted precision scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray diffraction studies demonstrate that such a difference in the corrosion behavior is conditioned by a difference in the morphology and origin of the nano-sized particles of second phases, as well as by a change in the electrochemical properties of the “particle–α-Mg” pair. The obtained results are discussed from the perspective of the innovative applications of biodegradable Mg alloys for the manufacture of advanced medical implants and products.

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Mg-Ca binary alloy sheets with Ca contents of ≤1 wt.% with high corrosion resistance and high toughness

Cited by 39 publications

References 31 publications

Influence of ultra-fine grain structure on corrosion behaviour of biodegradable Mg-1Ca alloy

Influence of ultra-fine grain structure on corrosion behaviour of biodegradable Mg-1Ca alloy

Review of bioresorbable AZ91, AZ31 and Mg–Zn–Ca implants and their manufacturing methods

Effect of Microstructure Refinement on the Corrosion Behavior of the Bioresorbable Mg-1Zn-0.2Ca and Mg-1Ca Alloys

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