Acta Metallurgica Sinica (English Letters) ›› 2020, Vol. 33 ›› Issue (1): 103-114.DOI: 10.1007/s40195-019-00956-6
• Original Paper • Previous Articles Next Articles
Yabo Zhang1, Huiling Yang1, Shaoqian Lei1, Shijie Zhu1,2(), Jianfeng Wang1,2, Yufeng Sun1,2, Shaokang Guan1,2()
Received:
2019-04-10
Revised:
2019-07-18
Online:
2020-01-10
Published:
2020-02-20
Contact:
Zhu Shijie,Guan Shaokang
Yabo Zhang, Huiling Yang, Shaoqian Lei, Shijie Zhu, Jianfeng Wang, Yufeng Sun, Shaokang Guan. Preparation of Biodegradable Mg/β-TCP Biofunctional Gradient Materials by Friction Stir Processing and Pulse Reverse Current Electrodeposition[J]. Acta Metallurgica Sinica (English Letters), 2020, 33(1): 103-114.
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NaCl | NaHCO3 | KCl | K2HPO4·3H2O | MgCl2·6H2O | HCl | CaCl2 | Na2SO4 | Tris |
---|---|---|---|---|---|---|---|---|
8.035 g | 0.355 g | 0.225 g | 0.231 g | 0.311 g | 39 ml | 0.292 g | 0.072 g | 6.118 g |
Table 1 Amount of reagents for preparing 1000 ml of the SBF solution
NaCl | NaHCO3 | KCl | K2HPO4·3H2O | MgCl2·6H2O | HCl | CaCl2 | Na2SO4 | Tris |
---|---|---|---|---|---|---|---|---|
8.035 g | 0.355 g | 0.225 g | 0.231 g | 0.311 g | 39 ml | 0.292 g | 0.072 g | 6.118 g |
Sample state | Ecorr (V) | icorr (A cm-2) |
---|---|---|
Annealed Mg-2Zn-0.46Y-0.5Nd | -?1.590 | 9.65?×?10-4 |
Mg/β-TCP?+?FSP-4 | -?1.671 | 1.07?×?10-4 |
Mg/β-TCP FGM | -?1.575 | 1.57?×?10-5 |
Table 2 Electrochemical data for the experimental samples in SBF solution derived from the polarization curves
Sample state | Ecorr (V) | icorr (A cm-2) |
---|---|---|
Annealed Mg-2Zn-0.46Y-0.5Nd | -?1.590 | 9.65?×?10-4 |
Mg/β-TCP?+?FSP-4 | -?1.671 | 1.07?×?10-4 |
Mg/β-TCP FGM | -?1.575 | 1.57?×?10-5 |
Fig. 8 SEM images of the coatings on Mg/β-TCP by FSP-1 deposited at 0.1 mA/cm2 with 0 s a, 5 s b, 15 s c, 60 s d, 300 s e, respectively; regions 1 and 2 represent the presence of β-TCP and the absence of β-TCP
Fig. 10 Cross-sectional morphologies and corresponding liner element distribution curves of the coatings on Mg/β-TCP?+?FSP-4 deposited at 10 mA/cm2 with 5 min a, 15 min b, 30 min c, respectively
Fig. 12 Corrosion rate: a Mg alloy, Mg/β-TCP and Mg/β-TCP FGM-30 min immersed in SBF for 14 days; b Mg/β-TCP FGM-5 min/Mg/β-TCP FGM-15 min immersed in SBF for 12 days
Fig. 14 Corrosion morphology of Mg/β-TCP FGM-30 min immersed in SBF for 72 h a, 168 h b, 288 h c; Mg/β-TCP FGM-15 min for 24 h d, 96 h e, 288 h f; Mg/β-TCP FGM-5 min for 24 h g, 72 h h, 288 h i; the area of white box is the place of EDS
Time (h) | C | O | Mg | P | Ca | |
---|---|---|---|---|---|---|
Mg/β-TCP FGM-30 min | 72 | 26.07 | 33.88 | 6.11 | 16.93 | 17.01 |
168 | 36.01 | 40.25 | 8.72 | 8.11 | 6.91 | |
288 | 30.39 | 51.42 | 8.08 | 7.43 | 2.68 | |
Mg/β-TCP FGM-15 min | 24 | 23.28 | 36.84 | 14.89 | 11.99 | 11.66 |
96 | 24.36 | 39.69 | 29.40 | 3.23 | 1.49 | |
288 | 25.20 | 45.98 | 6.32 | 10.39 | 9.96 | |
Mg/β-TCP FGM-5 min | 24 | 23.63 | 42.39 | 7.49 | 13.86 | 11.16 |
72 | 21.38 | 43.10 | 29.97 | 3.05 | 0.92 | |
288 | 36.52 | 32.33 | 3.71 | 13.98 | 12.21 |
Table 3 Element content of Mg/β-TCP FGM in Fig. 13 white area (at.%)
Time (h) | C | O | Mg | P | Ca | |
---|---|---|---|---|---|---|
Mg/β-TCP FGM-30 min | 72 | 26.07 | 33.88 | 6.11 | 16.93 | 17.01 |
168 | 36.01 | 40.25 | 8.72 | 8.11 | 6.91 | |
288 | 30.39 | 51.42 | 8.08 | 7.43 | 2.68 | |
Mg/β-TCP FGM-15 min | 24 | 23.28 | 36.84 | 14.89 | 11.99 | 11.66 |
96 | 24.36 | 39.69 | 29.40 | 3.23 | 1.49 | |
288 | 25.20 | 45.98 | 6.32 | 10.39 | 9.96 | |
Mg/β-TCP FGM-5 min | 24 | 23.63 | 42.39 | 7.49 | 13.86 | 11.16 |
72 | 21.38 | 43.10 | 29.97 | 3.05 | 0.92 | |
288 | 36.52 | 32.33 | 3.71 | 13.98 | 12.21 |
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