Biodegradable Mg–Zn–Ca–Sr bulk metallic glasses with enhanced corrosion performance for biomedical applications

Li, Haifei; Pang, Shujie; Liu, Ying; Sun, Lulu; Liaw, Peter K.; Zhang, Tao

doi:10.1016/j.matdes.2014.10.085

Cited by 154 publications

(87 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…For Mg-Zn-Ca system, the glass-forming ability (GFA) of the alloys is not so good [17,18]. Ribbon samples can be relatively easily prepared with full-amorphous structures due to their fast cooling rate during melt-spinning, and the mechanical properties are generally good, when compared with the bulk samples, because of the size effect [19,20].…”

Section: Discussionmentioning

confidence: 99%

Rapid Degradation of Azo Dyes by Melt-Spun Mg-Zn-Ca Metallic Glass in Artificial Seawater

Chen

et al. 2017

Metals

View full text Add to dashboard Cite

Mg-Zn-Ca metallic glass (MG) is effective for degrading azo dyes; however, the related surface evolution and degradation mechanisms are little known. We comparatively investigated the initial surface corrosion morphologies of melt-spun Mg 66 Zn 30 Ca 4 MG in deionized water and artificial seawater. It was found that the basic corrosion behavior of the MG was the same, except that the corrosion process was accelerated in seawater. The presence of NaCl obviously promotes the formation of nano-ZnO on the surface of ribbons, causing the rapid degradation of azo dyes due to the photocatalytic effect. The degradation efficiency when combined with 3.5 wt % NaCl was over 100 times higher than that without NaCl. This indicates that Mg-Zn-Ca MG ribbons are effective additives for the degradation of azo dyes in seawater.

show abstract

Section: Discussionmentioning

confidence: 99%

Rapid Degradation of Azo Dyes by Melt-Spun Mg-Zn-Ca Metallic Glass in Artificial Seawater

Chen

et al. 2017

Metals

View full text Add to dashboard Cite

show abstract

“…The presence of magnesium hydroxide among the corrosion products was demonstrated by a single Mg 2p peak ( Figure 12) at a binding energy of 50.5 ± 0.1 eV (BE) [72,73]. As can be indicated by the decreased intensity of the Mg 2p spectra, a lesser amount of magnesium hydroxide precipitated on the Si/MgO-coated compared to those of the uncoated and MgO-coated immersed specimen samples, which indicate enhanced degradation resistance of the Mg/HA/TiO 2 bionanocomposite with the Si/MgO coating.…”

Section: Characterization and Microstructure Of Immersed Samples In Smentioning

confidence: 99%

Biodegradable Mg/HA/TiO2 Nanocomposites Coated with MgO and Si/MgO for Orthopedic Applications: A Study on the Corrosion, Surface Characterization, and Biocompatability

et al. 2017

View full text Add to dashboard Cite

Abstract:In the field of orthopedics, magnesium (Mg) and magnesium-based composites as biodegradable materials have attracted fundamental research. However, the medical applications of magnesium implants have been restricted owing to their poor corrosion resistance, especially in the physiological environment. To improve the corrosion resistance of Mg/HA/TiO 2 nanocomposites, monolayer MgO and double-layer Si/MgO coatings were fabricated layer-by-layer on the surface of a nanocomposite using a powder metallurgy route. Then, coating thickness, surface morphology, and chemical composition were determined, and the corrosion behavior of the uncoated and coated samples was evaluated. Field-emission scanning electron microscopy (FE-SEM) micrographs show that an inner MgO layer with a porous microstructure and thickness of around 34 µm is generated on the Mg/HA/TiO 2 nanocomposite substrate, and that the outer Si layer thickness is obtained at around 23 µm for the double-layered coated sample. Electrochemical corrosion tests and immersion corrosion tests were carried out on the uncoated and coated samples and the Si/MgO-coated nanocomposite showed significantly improved corrosion resistance compared with uncoated Mg/HA/TiO 2 in simulated body fluid (SBF). Corrosion products comprising Mg(OH) 2 , HA, Ca 3 (PO 4 ) 2 , and amorphous CaP components were precipitated on the immersed samples. Improved cytocompatibility was observed with coating as the cell viability ranged from 73% in uncoated to 88% for Si/MgO-coated Mg/HA/TiO 2 nanocomposite after nine days of incubation.

show abstract

“…Physical and mechanical properties such as: low density, close matching of elastic modulus with the cortical bone; and biological properties such as: bio-compatibility, bio-degradability and bioresorbability, are a few of the reasons contributing to their recognition as promising materials [6]. In the recent years, Mg based metallic glasses, have emerged as promising candidates for bio-medical applications [6][7][8]. Unlike their crystalline counterparts, they are single phase, chemically homogenous systems with the absence of microstructural defects such as grain boundaries, dislocations and precipitates [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Role of partially amorphous structure and alloying elements on the corrosion behavior of Mg–Zn–Ca bulk metallic glass for biomedical applications

et al. 2015

View full text Add to dashboard Cite

Biodegradable Mg–Zn–Ca–Sr bulk metallic glasses with enhanced corrosion performance for biomedical applications

Cited by 154 publications

References 42 publications

Rapid Degradation of Azo Dyes by Melt-Spun Mg-Zn-Ca Metallic Glass in Artificial Seawater

Rapid Degradation of Azo Dyes by Melt-Spun Mg-Zn-Ca Metallic Glass in Artificial Seawater

Biodegradable Mg/HA/TiO2 Nanocomposites Coated with MgO and Si/MgO for Orthopedic Applications: A Study on the Corrosion, Surface Characterization, and Biocompatability

Role of partially amorphous structure and alloying elements on the corrosion behavior of Mg–Zn–Ca bulk metallic glass for biomedical applications

Contact Info

Product

Resources

About