Investigating the stress corrosion cracking of a biodegradable Zn-0.8 wt%Li alloy in simulated body fluid

Li, Guannan; Zhu, Su-Ming; Nie, Jian–Feng; Zheng, Yufeng; Sun, Zhichao

doi:10.1016/j.bioactmat.2020.10.009

Cited by 24 publications

(11 citation statements)

References 35 publications

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“…Figure 2b shows the SEM microstructure of the R1 alloy. The microstructure comprised elliptical Zn grains and needle-like α-LiZn4 [27,28]. This observation is consistent with the XRD results.…”

Section: Resultssupporting

confidence: 90%

Strengthening Mechanism of Rotary-Forged Deformable Biodegradable Zn-0.45Li Alloys

et al. 2023

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The use of zinc (Zn) alloys as a biodegradable metal for medical purposes has been a popular research topic. This study investigated the strengthening mechanism of Zn alloys to enhance their mechanical properties. Three Zn-0.45Li (wt.%) alloys with different deformation amounts were prepared by rotary forging deformation. Their mechanical properties and microstructures were tested. A simultaneous increase in strength and ductility was observed in the Zn-0.45Li alloys. Grain refinement occurred when the rotary forging deformation reached 75.7%. The surface average grain size reached 1.19 ± 0.31 μm, and the grain size was uniformly distributed. Meanwhile, the maximum elongation of the deformed Zn-0.45Li was 139.2 ± 18.6%, and the ultimate tensile strength reached 426.1 ± 4.7 MPa. In situ tensile tests showed that the reinforced alloys still broke from the grain boundary. Continuous and discontinuous dynamic recrystallization during severe plastic deformation produced many recrystallized grains. During deformation, the dislocation density of the alloy first increased and then decreased, and the texture strength of the (0001) direction increased with deformation. Analysis of the mechanism of alloy strengthening showed that the strength and plasticity enhancement of Zn-Li alloys after macro deformation was a combination of dislocation strengthening, weave strengthening, and grain refinement rather than only fine-grain strengthening as observed in conventional macro-deformed Zn alloys.

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Section: Resultssupporting

confidence: 90%

Strengthening Mechanism of Rotary-Forged Deformable Biodegradable Zn-0.45Li Alloys

et al. 2023

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“…At stage b, Zn may be alloyed to form LiZn when the voltage reduces to 0.8 V during the subsequent lithiation process (eq ). It has been reported that the Zn–Li alloy has good mechanical properties, which means that the generated Zn can not only participate in electrochemical reaction to provide extra capacity but also disperse evenly among SnO x nanoparticles as a barrier to inhibit the volume expansion during cycling. Meanwhile, the high electrical conductivity of the Zn–Li alloy accelerates the transport of electrons .…”

Section: Resultsmentioning

confidence: 99%

A SnO_x Quantum Dots Embedded Carbon Nanocage Network with Ultrahigh Li Storage Capacity

et al. 2021

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Tin-based materials with high specific capacity have been studied as high-performance anodes for energy storage devices. Herein, a SnO x (x = 0, 1, 2) quantum dots@carbon hybrid is designed and prepared by a binary oxide-induced surface-targeted coating of ZIF-8 followed by pyrolysis approach, in which SnO x quantum dots (under 5 nm) are dispersed uniformly throughout the nitrogen-containing carbon nanocage. Each nanocage is cross-linked to form a highly conductive framework. The resulting SnO x @C hybrid exhibits a large BET surface area of 598 m2 g–1, high electrical conductivity, and excellent ion diffusion rate. When applied to LIBs, the SnO x @C reveals an ultrahigh reversible capacity of 1824 mAh g–1 at a current density of 0.2 A g–1, and superior capacities of 1408 and 850 mAh g–1 even at high rates of 2 and 5 A g–1, respectively. The full cell assembled using LiFePO4 as cathode exhibits the high energy density and power density of 335 Wh kg–1 and 575 W kg–1 at 1 C based on the total active mass of cathode and anode. Combined with in situ XRD analysis, the superior electrochemical performance can be attributed to the SnO x -ZnO-C asynchronous and united lithium storage mechanism, which is formed by the well-designed multifeatured construction composed of SnO x quantum dots, interconnected carbon network, and uniformly dispersed ZnO nanoparticles. Importantly, this designed synthesis can be extended for the fabrication of other electrode materials by simply changing the binary oxide precursor to obtain the desired active component or modulating the type of MOFs coating to achieve high-performance LIBs.

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“…According to Li et al [16] during the immersion experiment, polyetheretherketone (PEEK) rings were used to apply compressive or tensile stress to the specimens. The diameter of PEEK ring was 14 mm.…”

Section: Immersion Experiments Under Static Loadmentioning

confidence: 99%

Influence of applied stress on the corrosion resistance of micro-arc oxide coatings on AZ31B magnesium alloy

Chen

Wang

Chang

2023

Corrosion Engineering, Science and Technology

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A micro-arc oxidised (MAO) protective coating was formed onto AZ31B magnesium alloy samples which were then loaded into 'C' rings to apply compressive and tensile stresses. The influence of these applied stresses on the protective ability of the coating in simulated body fluid was assessed by surface characterisation and electrochemical testing. It was found that the undulating surface and pore structure of the MAO ceramic coatings was affected by the stress during immersion with a greater number of closed pores under compression and more open pores, with additional cracks, under tension. During the earlier stages of immersion, compressive stresses enhanced the corrosion resistance whilst tensile stresses accelerated corrosion. However, at later stages of immersion both compressive and tensile stress caused enhanced corrosion with tensile stresses consistently worse than compressive stresses.

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Investigating the stress corrosion cracking of a biodegradable Zn-0.8 wt%Li alloy in simulated body fluid

Cited by 24 publications

References 35 publications

Strengthening Mechanism of Rotary-Forged Deformable Biodegradable Zn-0.45Li Alloys

Strengthening Mechanism of Rotary-Forged Deformable Biodegradable Zn-0.45Li Alloys

A SnO_x Quantum Dots Embedded Carbon Nanocage Network with Ultrahigh Li Storage Capacity

Influence of applied stress on the corrosion resistance of micro-arc oxide coatings on AZ31B magnesium alloy

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Investigating the stress corrosion cracking of a biodegradable Zn-0.8 wt%Li alloy in simulated body fluid

Cited by 24 publications

References 35 publications

Strengthening Mechanism of Rotary-Forged Deformable Biodegradable Zn-0.45Li Alloys

Strengthening Mechanism of Rotary-Forged Deformable Biodegradable Zn-0.45Li Alloys

A SnOx Quantum Dots Embedded Carbon Nanocage Network with Ultrahigh Li Storage Capacity

Influence of applied stress on the corrosion resistance of micro-arc oxide coatings on AZ31B magnesium alloy

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A SnO_x Quantum Dots Embedded Carbon Nanocage Network with Ultrahigh Li Storage Capacity