Author
Yu-Hong Zou
Bio: Yu-Hong Zou is an academic researcher from Shandong University of Science and Technology. The author has contributed to research in topics: Coating & Magnesium alloy. The author has an hindex of 16, co-authored 24 publications receiving 580 citations.
Topics: Coating, Magnesium alloy, Corrosion, Magnesium, Materials science
Papers
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TL;DR: A novel coating strategy for manufacturing biodegradable Mg alloys with good corrosion resistance, biocompatibility and antibacterial activity for future orthopedic applications is provided.
107 citations
TL;DR: In this article, the chemical and morphological characteristics of micro-arc oxidation (MAO) and chitosan (CS) composite coatings, fabricated on Mg-4Li-1Ca alloy, are analyzed through field-emission scanning electronic microcopy, energy dispersive X-ray spectroscopy, Xray diffraction and Fourier transform infrared spectrograph.
Abstract: Regulating degradation rate and moderate pH micro-environment for biodegradable magnesium alloys face huge challenge. The chemical and morphological characteristics of micro-arc oxidation (MAO) and chitosan (CS) composite coatings, fabricated on Mg-4Li-1Ca alloy, are analyzed through field-emission scanning electronic microcopy, energy dispersive X-ray spectroscopy, X-ray diffraction and Fourier transform infrared spectroscopy. Corrosion resistance of the samples is evaluated via hydrogen evolution, potentiodynamic polarization and electrochemical impedance spectroscopy in Hank's solution. Results indicated that the MAO and CS coating enhances the corrosion resistance and antibacterial growth activity. With increasing immersion time, the degradation of the MAO/CS coatings gives rise to a decrease in pH value and leads to a rapid increase in hydrogen evolution rate after an immersion in Hank's solution after 100 h. The MAO/CS coatings retain the solution pH at a moderate level (less than or equal to 8.25). A novel self-degradation mechanism of the MAO/CS coating on Mg-Li-Ca alloy is proposed due to the fact that MAO/CS coating is cathodic relative to the substrate.
104 citations
TL;DR: The role of Mg2Ca on the formation and degradation mechanisms of MAO coating was discussed in this paper, where it was shown that Mg 2Ca significantly improved the corrosion resistance of alloy.
86 citations
TL;DR: In this article, a review of the development of cutting-edge preparation technologies and antibacterial mechanisms of Mg alloys and considerable numbers of corrosion resistant and functional coatings are summarized.
Abstract: Magnesium (Mg) alloys as a bioabsorbable light metal have shown great clinical potential as bone replacement implants. In this review, the categories, progress in cutting-edge preparation technologies and antibacterial mechanisms of Mg alloys and considerable numbers of corrosion-resistant and functional coatings are summarized. The relationship among the microstructure (grain size, intermetallic compounds), biocorrosion resistance and biocompatibility for antibacterial Mg alloys is discussed. The challenge and outlooks of biomedical Mg alloys and coatings are proposed from an antibacterial perspective.
74 citations
TL;DR: In this paper, a SnO2-doped calcium phosphate (Ca-P-Sn) coating was constructed on Mg-1Li-1Ca alloy by a hydrothermal process.
57 citations
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TL;DR: In 2018 and 2019, significant progress has been achieved in high-performance cast and wrought magnesium and magnesium alloys, such as Mg ion batteries, hydrogen storage Mg materials, bio-magnesium alloys and functional magnesium materials as discussed by the authors.
744 citations
TL;DR: Progress in development of polymeric coatings on biomedical Mg alloys regarding preparation strategy, corrosion resistance and biocompatibility, including polylactic acid (PLA), poly (latic-co-glycolic) acid (PLGA), polycaprolactone (PCL), polydopamine (PDA), collagen (Col) and their composite is summarized.
314 citations
TL;DR: In this paper, a micro-arc oxidation (MAO)/polymethyltrimethoxysilane (PMTMS) hybrid coating was fabricated via MAO processing and subsequent sealing with alkaline treatment and PMTMS.
310 citations
TL;DR: In this paper, the authors reviewed the cutting-edge advances and progress of biodegradable surface coatings upon Mg alloys over the last decades, and aimed to build up a knowledge framework of surface modification on bioregradable Mg alloy.
259 citations
TL;DR: The results indicated that the MAO/PLLA composite coatings significantly enhanced the corrosion resistance of the Mg-1Li-1Ca alloy and may be appropriate for applications on degradable M g-based orthopedic implants.
Abstract: Manipulating the degradation rate of biomedical magnesium alloys poses a challenge. The characteristics of a microarc oxidation (MAO), prepared in phytic acid, and poly(l-lactic acid) (PLLA) composite coating, fabricated on a novel Mg–1Li–1Ca alloy, were studied through field emission scanning electron microscopy (FE-SEM), electron probe X-ray microanalysis (EPMA), energy dispersive X-ray spectroscopy (EDS) and X-ray diffraction (XRD). The corrosion behaviors of the samples were evaluated via hydrogen evolution, potentiodynamic polarization and electrochemical impedance spectroscopy in Hanks’ solution. The results indicated that the MAO/PLLA composite coatings significantly enhanced the corrosion resistance of the Mg–1Li–1Ca alloy. MTT and ALP assays using MC3T3 osteoblasts indicated that the MAO/PLLA coatings greatly improved the cytocompatibility, and the morphology of the cells cultured on different samples exhibited good adhesion. Hemolysis tests showed that the composite coatings endowed the Mg–1Li–1...
247 citations