Atmospheric RE-free Mg-based bulk metallic glass with high bio-corrosion resistance

Guo, Shuyu; Chan, Kang Cheung; Jiang, Xuebin; Zhang, H. J.; Zhang, D. F.; Wang, J. F.; Jiang, Bing; Pan, Feng

doi:10.1016/j.jnoncrysol.2013.07.036

Cited by 18 publications

(8 citation statements)

References 27 publications

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“…Compared with some other typical biodegradable Mg alloys, such as ZK60 [ 22 ] and Mg-1Ca [ 23 ], ZK30-0.5Ag exhibited an enhanced corrosion resistance with a small degradation rate, as listed in Table 1 . For extremely individual Mg alloys with particular structure, such as Mg 69 Zn 27 Ca 4 bulk metallic glass [ 24 ], it exhibited a smaller degradation rate than ZK30-0.5Ag, which could be ascribed to the fact that the amorphous structure promoted the formation of more passive oxide film on Mg matrix.…”

Section: Resultsmentioning

confidence: 99%

Ag-Introduced Antibacterial Ability and Corrosion Resistance for Bio-Mg Alloys

Shuai

Zhou

Yang

et al. 2018

BioMed Research International

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Bone implants are expected to possess antibacterial ability and favorable biodegradability. Ag possesses broad-spectrum antibacterial effects through destroying the respiration and substance transport of bacteria. In this study, Ag was introduced into Mg-3Zn-0.5Zr (ZK30) via selective laser melting technology. Results showed that ZK30-Ag exhibited a strong and stable antibacterial activity against the bacterium Escherichia coli. Moreover, the degradation resistance was enhanced due to the comprehensive effect of positive shifted corrosion potential (from -1.64 to -1.53 V) and grains refinement. The positive shifted corrosion potential reduced the severe galvanic corrosion by lowering the corrosion potential difference between the matrix and the second phase. Meanwhile, the introduction of Ag caused the grain refinement strengthening and precipitated-phase strengthening, resulting in improved compressive yield strength and hardness. Furthermore, ZK30-0.5Ag exhibited good biocompatibility. It was suggested that Ag-modified ZK30 was potential candidate for bone implants.

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Section: Resultsmentioning

confidence: 99%

Ag-Introduced Antibacterial Ability and Corrosion Resistance for Bio-Mg Alloys

Shuai

Zhou

Yang

et al. 2018

BioMed Research International

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“…The existing works show some effective strategies to improve the corrosion resistance of Mg-based MGs. Adjusting the element composition and proportion of the MGs [14][15][16] is one of the simple strategies. By introducing iron particles into Mg-based MGs [17] and by forming a micro-arc oxidation (MAO) layer containing Si on the surface of Mg-based MGs [18], the corrosion resistance of the MGs can also be improved.…”

Section: Introductionmentioning

confidence: 99%

Stearic Acid Coated MgO Nanoplate Arrays as Effective Hydrophobic Films for Improving Corrosion Resistance of Mg-Based Metallic Glasses

Liu

Xiong

et al. 2020

Nanomaterials

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Mg-based metallic glasses (MGs) are widely studied due to their high elasticity and high strength originating from their amorphous nature. However, their further application in many potential fields is limited by poor corrosion resistance. In order to improve this property, an MgO nanoplate array layer is first constructed on the surface of Mg-based MGs by cyclic voltammetry (CV) treatments. In this situation, the corrosion resistance and hydrophilicity of the material are enhanced. Then, stearic acid (SA) can effectively adhere onto the surface of the MgO layer to form a superficial hydrophobic film with a water contact angle (WCA) of 131°. As a result, the SA coated MgO hydrophobic film improves the corrosion resistance of Mg-based MGs in 3.5 wt.% NaCl solution obviously. In addition, the effects of four technological parameters (solution concentration, sweep rate, cycle number, and reaction temperature) in the CV process on the morphology and size of nano-products are investigated in detail. The work proposes a new method for the creation of nanostructures on the surface of materials and provides a new idea to increase the corrosion resistance of MGs. The related method is expected to be applied in wider fields in future.

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“…After the fracture has healed, the bone implant needs to be removed again, causing secondary damage to the patient. Magnesium alloys have many outstanding features, such as light weight, low density, high specific strength, easy processing, excellent biocompatibility, and degradability, showing great potential for applications in the biomedical field [3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Effect of melting method on the bio-corrosion resistance of Mg₆₇Zn₂₈Ca₅ cast magnesium alloy in simulated body fluid

Wang

Ding

et al. 2020

Mater. Res. Express

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In recent years, biodegradable magnesium alloys have attracted considerable attention in medical devices, such as permanent implants and stents. However, poor corrosion resistance is a major problem limiting the practical application of magnesium alloys. In this study, Mg 67 Zn 28 Ca 5 alloys were prepared via two different methods, namely, vacuum induction melting and ulfur hexafluoride shielded melting. The effect of melting method on the bio-corrosion resistance of MgZnCa cast magnesium alloy was also studied. The microstructure and phase composition of Mg 67 Zn 28 Ca 5 alloys were investigated by optical microscopy and X-ray diffraction. The element distribution and surface morphology of Mg 67 Zn 28 Ca 5 alloys were examined by scanning electron microscopy and energydispersive spectroscopy. The corrosion resistance of Mg 67 Zn 28 Ca 5 alloys was measured via electrochemical and immersion tests. Results showed uniform composition of the Mg 67 Zn 28 Ca 5 alloy melted by vacuum induction. Immersed in the simulated body fluid, the corrosion rate of Mg 67 Zn 28 Ca 5 by vacuum induction melting (0.2618 mm/a) was lower than that by ulfur hexafluoride shielded melting (0.9686 mm/a); the corrosion potential of Mg 67 Zn 28 Ca 5 melted by vacuum induction (−1313 mV) was nobler than that by ulfur hexafluoride shielded melting (−1483 mV); the corrosion current of Mg 67 Zn 28 Ca 5 by vacuum induction melting (1.202×10 −5 A) was lower than that by ulfur hexafluoride shielded melting (4.332×10 −5 A). The Mg 67 Zn 28 Ca 5 by vacuum induction melting showed uniform corrosion behavior.

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Atmospheric RE-free Mg-based bulk metallic glass with high bio-corrosion resistance

Cited by 18 publications

References 27 publications

Ag-Introduced Antibacterial Ability and Corrosion Resistance for Bio-Mg Alloys

Ag-Introduced Antibacterial Ability and Corrosion Resistance for Bio-Mg Alloys

Stearic Acid Coated MgO Nanoplate Arrays as Effective Hydrophobic Films for Improving Corrosion Resistance of Mg-Based Metallic Glasses

Effect of melting method on the bio-corrosion resistance of Mg₆₇Zn₂₈Ca₅ cast magnesium alloy in simulated body fluid

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Atmospheric RE-free Mg-based bulk metallic glass with high bio-corrosion resistance

Cited by 18 publications

References 27 publications

Ag-Introduced Antibacterial Ability and Corrosion Resistance for Bio-Mg Alloys

Ag-Introduced Antibacterial Ability and Corrosion Resistance for Bio-Mg Alloys

Stearic Acid Coated MgO Nanoplate Arrays as Effective Hydrophobic Films for Improving Corrosion Resistance of Mg-Based Metallic Glasses

Effect of melting method on the bio-corrosion resistance of Mg67Zn28Ca5 cast magnesium alloy in simulated body fluid

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Effect of melting method on the bio-corrosion resistance of Mg₆₇Zn₂₈Ca₅ cast magnesium alloy in simulated body fluid