Effect of addition of Si on microstructure, mechanical properties, bio-corrosion and cytotoxicity of Mg-6Al-1Zn alloy

Amirnejad, Mohabbat; Rajabi, Mohammad; Motavalli, Ali

doi:10.1016/s1003-6326(18)64819-8

Cited by 13 publications

(5 citation statements)

References 33 publications

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“…The corrosion resistance of AZ91 can be improved by alloying, manufacturing methods, coating and by surface treatment of magnesium alloy [80]. Alloying elements, such as Si [81], Sm [77] and Nd [82] have been investigated so far for AZ91 alloy implants, particularly for bioimplant applications. Hu et al [77] investigated the alloying addition of samarium with magnesium (AZ91) on the change in microstructure and corrosion resistance in 1M NaCl Solution.…”

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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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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“…From the enlarged views of the corroded surface of MS8 (as shown in Figure 5d), corrosion around the second phase Mg 2 Si is more severe compared with other areas. It should be pointed out [17] that the electrode potential of Mg 2 Si phase is higher than Mg matrix. The micro-galvanic corrosion formed between Mg 2 Si and Mg matrix can accelerate the corrosion.…”

Section: Static Immersion Corrosion Behaviormentioning

confidence: 96%

“…The potentiodynamic polarization curves for specimens MS8, GMS8-1 and GMS8-2 were directly analyzed by software CorrView, respectively, and the results were shown in Figure 3a. The fitted parameters were listed in Table 1 with some typical biodegradable Si-containing Mg alloys from literatures [17,20]. From Table 1, it is obvious that the corrosion current densities (I corr ) of GMS8-1 and GMS8-2 were much lower than that of MS8, and the typical Si-containing Mg alloys (Mg-6Al-1Zn-1Si and Mg-0.6Si) lie between them.…”

Section: Electrochemical Corrosion Behaviormentioning

confidence: 99%

“…Therefore, it should be concluded that the larger the proportion of Mg 2 Si, the greater the bio-corrosion resistance. As is well known that the Pilling-Bedworth (P-B) ratio of SiO 2 is 2.27 [17], which could improve the density of the corrosion product film. This partly explains why GMS8-1 and GMS8-2 show better bio-corrosion resistance than MS8.…”

Section: Static Immersion Corrosion Behaviormentioning

confidence: 99%

“…The influences of the morphology, size and distribution of the secondary phases on the corrosion performance of the alloys have been investigated [15,16]. Amirnejad et al [17] and Ben-Hamu et al [18] studied the effect of Mg 2 Si morphology on the corrosion behavior. They suggested that Mg 2 Si phases with large Chinese script shape accelerated the corrosion process, while the ones with the polygonal shape hindered it.…”

Section: Introductionmentioning

confidence: 99%

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Corrosion Behavior and Osteogenic Activity of a Biodegradable Orthopedic Implant Mg–Si Alloy with a Gradient Structure

Jiang

2021

Metals

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A gradient Mg-8 wt % Si alloy, which was composed of the agglomerated Mg2Si crystals coating (GMS8-1) and the eutectic Mg–Si alloy matrix (GMS8-2), was designed for biodegradable orthopedic implant materials. The bio-corrosion behavior was evaluated by the electrochemical measurements and the immersion tests. The results show that a significant improvement of bio-corrosion resistance was achieved by using the gradient Mg–Si alloy, as compared with the traditional Mg-8 wt % Si alloy (MS8), which should be attributed to the compact and insoluble Mg2Si phase distributed on the surface of the material. Especially, GMS8-1 exhibits the highest polarization resistance of 1610 Ω, the lowest corrosion current density of 1.7 × 10−6 A.cm−2, and the slowest corrosion rate of 0.10 mm/year. In addition, GMS8-1 and GMS8-2 show better osteogenic activity than MS8, with no cytotoxicity to MC3T3-E1 cells. This work provides a new way to design a gradient biodegradable Mg alloys with some certain biological functions.

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Optimization of friction stir processing to improve the mechanical properties of bone fixation plate inputs made of ZK60 magnesium alloy

Thanikodi,

Giri,

Ramesh

et al. 2024

Int J Adv Manuf Technol

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Effect of addition of Si on microstructure, mechanical properties, bio-corrosion and cytotoxicity of Mg-6Al-1Zn alloy

Cited by 13 publications

References 33 publications

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

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

Corrosion Behavior and Osteogenic Activity of a Biodegradable Orthopedic Implant Mg–Si Alloy with a Gradient Structure

Optimization of friction stir processing to improve the mechanical properties of bone fixation plate inputs made of ZK60 magnesium alloy

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