Influence of hot rolling parameters on microstructure and biodegradability of Mg–1Ca alloy in simulated body fluid

Koleini, Shahriar; Idris, Mohd Hasbullah; Jafari, Hassan

doi:10.1016/j.matdes.2011.06.063

Cited by 60 publications

(24 citation statements)

References 25 publications

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“…The white particles, which are negatively charged apatite nuclei, absorb Ca 2+ cations from the environment 23 . The resulted calcium-rich positively charged surface consumes PD 4 3-anion of the fluid. The process continues sequentially to form bone-like and needle-shaped bone-like apatite which can be observed in the alloys containing 3 and 4% calcium, respectively (Figures 6d and f).…”

Section: Immersion Testmentioning

confidence: 99%

“…However, pH value of the solution decreased for the alloys containing 3 and 4% calcium. These samples produced more Ca 2+ cation which consumes PD 4 3-anion during the formation of bone-like apatite. The preferential growth of the process product formed needle-shaped bone-like apatite.…”

Section: Hardness Behaviormentioning

confidence: 99%

“…In recent years, there has been an indisputable tendency to use magnesium and its alloys in implants or bone grafts as they have mechanical properties similar to human bone and are biocompatible and biodegradable both in-vivo and in-vitro [2][3][4] . Furthermore, in comparison with polymeric biodegradable implants, tensile yield strength and Young's modulus are higher in magnesium and its alloys 5 .…”

Section: Introductionmentioning

confidence: 99%

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Effect of calcium content on the microstructure, hardness and in-vitro corrosion behavior of biodegradable Mg-Ca binary alloy

et al. 2012

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Effect of calcium addition on microstructure, hardness value and corrosion behavior of five different Mg-xCa binary alloys (x = 0.7, 1, 2, 3, 4 wt. (%)) was investigated. Notable refinement in microstructure of the alloy occurred with increasing calcium content. In addition, more uniform distribution of Mg 2 Ca phase was observed in α-Mg matrix resulted in an increase in hardness value. The in-vitro corrosion examination using Kokubo simulated body fluid showed that the addition of calcium shifted the fluid pH value to a higher level similar to those found in pure commercial Mg. The high pH value amplified the formation and growth of bone-like apatite. Higher percentage of Ca resulted in needle-shaped growth of the apatite. Electrochemical measurements in the same solution revealed that increasing Ca content led to higher corrosion rates due to the formation of more cathodic Mg 2 Ca precipitate in the microstructure. The results therefore suggested that Mg-0.7Ca with the minimum amount of Mg 2 Ca is a good candidate for bio-implant applications.

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Section: Immersion Testmentioning

confidence: 99%

Section: Hardness Behaviormentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of calcium content on the microstructure, hardness and in-vitro corrosion behavior of biodegradable Mg-Ca binary alloy

et al. 2012

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“…They found significant improvement in that pitting corrosion resistance of calcium-containing magnesium alloys was significantly improved. Koleini et al [7] studied the influence of hot rolling parameters on microstructure and biodegradability of MgCa1.0 alloy. They expressed that more thickness reduction caused less corrosion and high preheated temperature of the MgCa implant increases the corrosion.…”

Section: Introductionmentioning

confidence: 99%

Influence of Manufacturing Parameters on Performance of Biodegradable Mg-Ca1.0 Implant

Desai

Pawade

Warhatkar

2017

Proceedings of the International Conference on Communication and Signal Processing 2016 (ICCASP 2016)

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Abstract:The paper reports the effects of machining parameters on performance of biodegradable magnesium calcium alloy implant in terms of surface roughness, microstructure, microhardness, chip morphology and degradation rate in face milling using CVD diamond like carbon coated carbide inserts. The result shows that the corrosion resistance of forged sample is higher than that of cast sample. It is also found that the surface roughness is the most significant factors affecting degradation rate. Degradation is mainly occured due to pitting corrosion phenomena. A fine grain microstructure is observed in forged sample and Mg 2 Ca phase is uniformly distributed in microstructure which improves the corrosion resistance. During machining microhardness is changed from 66Hv to 84Hv due to effect of machining parameters. As far as the chip morphology is concerned the depth of cut has significant influence on helical distance of chip.

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“…Corrosion resistant coating on Mg-Ca alloys has been shown to effectively delay the initiation of biodegradation [16], but there is a challenge to create a coating on Mg-Ca alloys, which has sufficient adhesion on substrate, high hardness, high toughness and high wear resistance [17]. Several studies showed that the corrosion resistance of MgCa alloys with Ca contents of ≥1% can be improved by refining their cast microstructures using thermomechanical processes such as extrusion, forging and rolling [11,14,18,19]. In a previous study [14], we reported that the break-up of the coarse or continuous Mg 2 Ca phase and refinement of grains in Mg-(1-3%)Ca alloys by indirect extrusion considerably improved the corrosion resistance of the alloys.…”

Section: Introductionmentioning

confidence: 99%

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

Seong

Kim

2015

Corrosion Science

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Influence of hot rolling parameters on microstructure and biodegradability of Mg–1Ca alloy in simulated body fluid

Cited by 60 publications

References 25 publications

Effect of calcium content on the microstructure, hardness and in-vitro corrosion behavior of biodegradable Mg-Ca binary alloy

Effect of calcium content on the microstructure, hardness and in-vitro corrosion behavior of biodegradable Mg-Ca binary alloy

Influence of Manufacturing Parameters on Performance of Biodegradable Mg-Ca1.0 Implant

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

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