Combined XRD and XPS analysis of ex-situ and in-situ plasma hydrogenated magnetron sputtered Mg films

Milčius, D.; Grbović-Novaković, J.; Zostautiene, R.; Lelis, Martynas; Girdzevicius, Dalius; Urbonavičius, Marius

doi:10.1016/j.jallcom.2015.05.151

Cited by 29 publications

(15 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…(Figure C) The first peak at 1303.9 eV corresponds to Mg 1s in MgO. The second peak at 1302.7 eV is attributed to the contribution of Mg 1s in Mg(OH) 2 . The appearance of MgO and Mg(OH) 2 indicates that Mg alloy substrate reacts with the water in solution and generates oxide films during the preparation of PDA.…”

Section: Resultsmentioning

confidence: 98%

Characterization and cytocompatibility of polydopamine on MAO‐HA coating supported on Mg‐Zn‐Ca alloy

Feng

Zhang

Lei

et al. 2017

Surface & Interface Analysis

View full text Add to dashboard Cite

Magnesium has been suggested as a potential biodegradable metal for the usage as orthopaedic implants. However, high degradation rate in physiological environment remains the biggest challenge, impeding wide clinical application of magnesium‐based biomaterials. In order to reduce its degradation rate and improve the biocompatibility, micro‐arc oxidation coating doped with HA particles (MAO‐HA) was applied as the inner coating, and polydopamine (PDA) film was synthesized by dopamine self‐polymerization as the outer coating. The microstructure evolution of the coating was characterized using scanning electron microscopy (SEM), atomic force microscope (AFM), X‐ray diffraction analyses (XRD), Fourier transform infrared spectroscopy (FT‐IR), and X‐ray photoelectron spectroscopy (XPS). The results showed that PDA film had covered the entire surface of MAO‐HA coating and the pore size of MAO‐HA coating decreased. The root mean square (RMS) roughness of PDA/MAO‐HA coatings was approximately 106.46 nm, which was closer to the optimum surface roughness for cellular attachment as compared with MAO‐HA coatings. Contact angle measurement indicated that the surface wettability had been transformed from hydrophobic to hydrophilic due to the introduction of PDA. The PDA/MAO‐HA coatings exhibited better corrosion resistance in vitro, with the self‐corrosion potential increasing by 150 mV and the corrosion current density decreasing from 2.09 × 10−5 A/cm2 to 1.46 × 10−6 A/cm2. In hydrogen evolution tests, the corrosion rates of the samples coated with PDA/MAO‐HA and MAO‐HA were 4.40 and 5.95 mm/y, respectively. MTS assay test and cell‐surface interactions experiment demonstrated that PDA/MAO‐HA coatings exhibited good cellular compatibility and could promote the adhesion and proliferation of MC3T3‐E1 cells.

show abstract

Section: Resultsmentioning

confidence: 98%

Characterization and cytocompatibility of polydopamine on MAO‐HA coating supported on Mg‐Zn‐Ca alloy

Feng

Zhang

Lei

et al. 2017

Surface & Interface Analysis

View full text Add to dashboard Cite

show abstract

“…In spite of all potential benefits of the plasma hydrogenation procedure, the latest work on the hydrogenation of the Mg thin films demonstrated its limitations. This work revealed that the Mg oxide and hydroxide layer are formed and effectively block the formation of the hydride, even if its formation might be starting not at the surface but at the film-substrate interface and/or bulk of the film [72].…”

Section: Synthesis Of Mgh 2 Using Hydrogen Plasmabased Hydrogenation mentioning

confidence: 91%

Review of magnesium hydride-based materials: development and optimisation

et al. 2016

View full text Add to dashboard Cite

Magnesium hydride has been studied extensively for applications as a hydrogen storage material owing to the favourable cost and high gravimetric and volumetric hydrogen densities. However, its high enthalpy of decomposition necessitates high working temperatures for hydrogen desorption while the slow rates for some processes such as hydrogen diffusion through the bulk create challenges for large-scale implementation. The present paper reviews fundamentals of the Mg-H system and looks at the recent advances in the optimisation of magnesium hydride as a hydrogen storage material through the use of catalytic additives, incorporation of defects and an understanding of the rate-limiting processes during absorption and desorption.

show abstract

“…Thus, the result showed that the coatings contained Sb, and it was in the form of Sb 2 O 3 , while Sb 2 O 3 phase was not observed in the XRD patterns . According to the XPS peak, because the XPS binding energy of Mg2p and Si2p was 49.752 and 102.086eV, respectively, based on analyses, it could be assumed that Mg and Si were in the form of Mg 2+ and Si 4+ , respectively. Hence, the possible reactions are shown as follows:

Mg - 2 e \to {Mg}^{2 +}

{Mg}^{2 +} + O^{2 -} \to MgO

…”

Section: Resultsmentioning

confidence: 98%

The effect of Sb₂O₃ on the properties of micro‐arc oxidation coatings on magnesium alloys

Wang

Cao

Yang

et al. 2019

Int J Applied Ceramic Tech

View full text Add to dashboard Cite

Coatings incorporated with Sb2O3 were obtained on AZ31B magnesium alloy during micro‐arc oxidation (MAO) by adding Sb2O3 (0, 2, 4, 6, 8 g/L) into the electrolyte. The voltage of MAO process, microstructure, element distribution, thickness, phase analysis, microhardness, adhesion, and corrosion behavior of the coatings were, respectively, investigated. The results showed that the addition of different concentrations of Sb2O3 caused the voltage variation, which resulted in the changes in microstructure, element distribution, and phase composition of coatings, and further led to the improvement of coatings properties. It was found that the addition of Sb2O3 could effectively decrease the breakdown voltage, and made the voltage of micro‐arc oxidation stage change. Moreover, the presence of Sb2O3 influenced surface morphologies of the coatings. Additionally, with the increase in Sb2O3, the microhardness of coatings was 155.2, 199.78, 277.34, 267.53, and 127.93 HV, respectively; these were higher than substrate (68.5 HV). Moreover, the addition of Sb2O3 effectively improved adhesion. As the Sb2O3 increased, the corrosion rate was 2.19 × 10−4, 9.09 × 10−5, 4.10 × 10−5, 2.52 × 10−4, and 2.96 × 10−4 mm/a, respectively, and the corrosion resistance increased first and then decreased with the increase in Sb2O3. In sum, the optimal Sb2O3 concentration was 4 g/L.

show abstract

Combined XRD and XPS analysis of ex-situ and in-situ plasma hydrogenated magnetron sputtered Mg films

Cited by 29 publications

References 15 publications

Characterization and cytocompatibility of polydopamine on MAO‐HA coating supported on Mg‐Zn‐Ca alloy

Characterization and cytocompatibility of polydopamine on MAO‐HA coating supported on Mg‐Zn‐Ca alloy

Review of magnesium hydride-based materials: development and optimisation

The effect of Sb₂O₃ on the properties of micro‐arc oxidation coatings on magnesium alloys

Contact Info

Product

Resources

About

Combined XRD and XPS analysis of ex-situ and in-situ plasma hydrogenated magnetron sputtered Mg films

Cited by 29 publications

References 15 publications

Characterization and cytocompatibility of polydopamine on MAO‐HA coating supported on Mg‐Zn‐Ca alloy

Characterization and cytocompatibility of polydopamine on MAO‐HA coating supported on Mg‐Zn‐Ca alloy

Review of magnesium hydride-based materials: development and optimisation

The effect of Sb2O3 on the properties of micro‐arc oxidation coatings on magnesium alloys

Contact Info

Product

Resources

About

The effect of Sb₂O₃ on the properties of micro‐arc oxidation coatings on magnesium alloys