Corrosion behaviour of Mg-Gd-Y-Zn-Ag alloy components with different sizes after cooling

Xu, Shiyuan; Liu, Chuming; Wan, Yingchun; Zeng, Guang; Gao, Yonghao; Jiang, Shunong

doi:10.1016/s1003-6326(21)65578-4

Cited by 14 publications

(4 citation statements)

References 44 publications

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“…The latter causes an increase in pH (over 7.8), and alkalization poisoning would induce toxicity [ 18 ]. There are several studies that investigated the effect of alloy design on corrosion control, including the use of calcium (Ca) [ [19] , [20] , [21] ], zinc (Zn) [ [22] , [23] , [24] ], gadolinium Gd [ [25] , [26] , [27] ], manganese (Mn) [ [28] , [29] , [30] , [31] ], strontium (Sr) [ 30 , 31 ], lithium (Li) [ 32 , 33 ], yttrium (Y) [ [34] , [35] , [36] , [37] ], and zirconium (Zr) [ 37 , 38 ]. It should be noted that the amount of second phase formation and its distribution and microstructural evolution can significantly influence the corrosion rate of Mg alloys [ 39 ].…”

Section: Introductionmentioning

confidence: 99%

Potential bioactive coating system for high-performance absorbable magnesium bone implants

Sarian

Iqbal

Sotoudehbagha

et al. 2022

Bioactive Materials

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Magnesium alloys are considered the most suitable absorbable metals for bone fracture fixation implants. The main challenge in absorbable magnesium alloys is their high corrosion/degradation rate that needs to be controlled. Various coatings have been applied to magnesium alloys to slow down their corrosion rates to match their corrosion rate to the regeneration rate of the bone fracture. In this review, a bioactive coating is proposed to slow down the corrosion rate of magnesium alloys and accelerate the bone fracture healing process. The main aim of the bioactive coatings is to enhance the direct attachment of living tissues and thereby facilitate osteoconduction. Hydroxyapatite, collagen type I, recombinant human bone morphogenetic proteins 2, simvastatin, zoledronate, and strontium are six bioactive agents that show high potential for developing a bioactive coating system for high-performance absorbable magnesium bone implants. In addition to coating, the substrate itself can be made bioactive by alloying magnesium with calcium, zinc, copper, and manganese that were found to promote bone regeneration.

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Section: Introductionmentioning

confidence: 99%

Potential bioactive coating system for high-performance absorbable magnesium bone implants

Sarian

Iqbal

Sotoudehbagha

et al. 2022

Bioactive Materials

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“…It helps to disclose the correlation between the surface morphological evolution and the corrosion process itself, which is critical for understanding the corrosion mechanisms. In aggressive solutions, impedance diagrams of Mg alloys normally contain one or two capacitance loops at high and medium frequencies and one inductive loop at low frequencies [ 15 , 16 , 17 , 18 , 19 , 20 , 21 ]. Further studies have indicated that the capacitance loops represent the charge transfer process across the capacitive double layer and the accumulated corrosion products, and the inductive loops represent the relaxation process of intermediate species (mainly

) [ 22 , 23 , 24 , 25 , 26 , 27 ].…”

Section: Introductionmentioning

confidence: 99%

Influence of Long-Period Stacked Ordered Phases on Inductive Impedance of Mg-Gd-Y-Zn-Zr-Ag Alloys

Liu

Gao

et al. 2023

Materials

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In this paper, the influence of long-period stacked ordered (LPSO) phases on the electrochemical impedance spectroscopy (EIS) of a Mg-Gd-Y-Zn-Zr-Ag alloy in 0.9 wt.% NaCl was investigated. The Mg-6Gd-3Y-1Zn-0.5Zr-0.3Ag (wt.%) alloy samples with and without LPSO phases in the grain interior (HOMO and LPSO, respectively) were prepared using different heat treatments. The EIS results showed that both the HOMO and LPSO samples’ Nyquist diagrams contained two inductive loops. However, in the Nyquist plots of the LPSO samples, the inductive loops at 1.71–0.67 Hz appeared in the first quadrant rather than the fourth quadrant. Analysis of the fitting parameters illustrated that the abnormal shape of the inductive loops is related to greater values of the surface film capacitance Cf and double layer capacitance Cdl in the LPSO samples. Further investigations through corrosion morphology observation indicated that the greater values of Cf and Cdl in the LPSO samples resulted from the existence of intragranular LPSO phases that created more film-free areas. The above results show that a better understanding of the relationship between the inductive impedance and corrosion morphology of a Mg-6Gd-3Y-1Zn-0.5Zr-0.3Ag alloy in 0.9 wt.% NaCl solution was attained.

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“…Various second-phases could be formed by adding alloying elements in magnesium. In particular, jointly adding rare earth (RE = Y, Er, Tm, Gd) elements and transition metal (TM = Ni, Cu, Zn) elements into magnesium will produce longperiod stacking ordered (LPSO) phase in the resultant alloys [14][15][16][17][18]. The LPSO phase can effectively hinder dislocation slip during the deformation process, resulting in dislocations pile up owing to high stability of the LPSO phase [19,20].…”

Section: Introductionmentioning

confidence: 99%

Substitution of Zn for Cu in Mg–Y–Zn alloys designed for fracturing ball

Xiong

et al. 2023

Materials Science and Technology

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The microstructure, mechanical properties and degradation behaviour of Mg95Y3Zn2 (MYZ), Mg95Y3Zn1Cu1 (MYZC), and Mg95Y3Cu2 (MYC) (at.-%) alloys have been studied. All the alloys mainly contain α-Mg matrix and LPSO phase. By substituting Zn for Cu, the composition of the LPSO phase transformed from Mg–Y–Zn to Mg–Y–Zn–Cu, and then to Mg–Y–Cu. The ultimate compressive strength is 227, 231 and 238 MPa, respectively. The MYC alloy exhibited much higher degradation rate than MYZC and MYZ alloys. The strong galvanic coupling effect between LPSO phase and the matrix, the grain size refinement and the weak protection from the corrosion product layer are responsible for the high degradation rate. It is suggested that the newly developed MYC alloy is promising for fracturing ball application.

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Corrosion behaviour of Mg-Gd-Y-Zn-Ag alloy components with different sizes after cooling

Cited by 14 publications

References 44 publications

Potential bioactive coating system for high-performance absorbable magnesium bone implants

Potential bioactive coating system for high-performance absorbable magnesium bone implants

Influence of Long-Period Stacked Ordered Phases on Inductive Impedance of Mg-Gd-Y-Zn-Zr-Ag Alloys

Substitution of Zn for Cu in Mg–Y–Zn alloys designed for fracturing ball

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