Magnesium nitride phase formation by means of ion beam implantation technique

Höche, Daniel; Blawert, Carsten; Cavellier, Matthieu; Busardo, Denis; Gloriant, T.

doi:10.1016/j.apsusc.2011.01.061

Cited by 27 publications

(20 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A high-resolution XPS scan of N1s (Figure 10) exhibited only one peak corresponding to a BE of 397.3 eV, which is consistent with the reported values for AlN. [23,24,26] A high-resolution scan of Mg2p revealed the existence of the Mg-O bond with a BE of (Fig. 3) sintered under different conditions.…”

Section: E Compositional Distributionsupporting

confidence: 74%

“…The distinct sintering behaviors between the outer and inner surfaces of outer samples are likely to be related to nitrogen gas behavior around these surfaces. [23] Metallic Al Al2p #2 73.4 73.9, [23,24] 73.5±0.3 [25] Al-N (AlN) Al2p #3 74.7 74.7 to 76.0, [23] 74.7±0.4 [25] Al-O (Al 2 O 3 ) N1s 397.3 397.2, [23,24] 397.4 ±0.2 [26] Al-N (AlN) Mg2p 51.0 50.8 [27] Mg-O (MgO)…”

Section: Discussionmentioning

confidence: 99%

“…The intensity of the first two subpeaks increased with the increasing sputtering depth while the third subpeak decayed. These three subpeaks were identified to be metallic Al (72.9 eV), [23] Al-N bond (73.4 eV), [23][24][25] and Al-O bond (74.7 eV), [23,25] respectively. A high-resolution XPS scan of N1s (Figure 10) exhibited only one peak corresponding to a BE of 397.3 eV, which is consistent with the reported values for AlN.…”

Section: E Compositional Distributionmentioning

confidence: 99%

See 2 more Smart Citations

Distortion in a 7xxx Aluminum Alloy during Liquid Phase Sintering

Yuan

Huo

Schaffer

et al. 2013

Metall Mater Trans A

View full text Add to dashboard Cite

The distortion in a sintered 7xxx aluminum alloy, Al-7Zn-2.5Mg-1Cu (wt. pct), has been investigated by sintering three rectangular bars in each batch at 893 K (620°C) for 0 to 40 minutes in nitrogen, followed by air or furnace cooling. They were placed parallel to each other, equally spaced apart at 2 mm, with their long axes being perpendicular to the incoming nitrogen flow. Pore evolution in each sample during isothermal sintering was examined metallographically. The compositional changes across sample mid-cross section and surface layers were analyzed using energy dispersive X-ray spectroscopy and X-ray photoelectron spectroscopy depth profiling, respectively. The two outer samples bent toward the middle one, while the middle sample was essentially distortion free after sintering. The distortion in the outer samples was a result of differential shrinkage between their outer and inner surfaces during isothermal sintering. The porous outer surface showed an enrichment of oxygen around the large pores as well as lower magnesium and zinc contents than the interior and inner surface of the same sample, while the inner surface was distinguished by the presence of AlN. The differential shrinkage was caused by different oxygen contents in local sintering atmosphere and unbalanced loss of magnesium and zinc between the outer and inner surfaces.

show abstract

Section: E Compositional Distributionsupporting

confidence: 74%

Section: Discussionmentioning

confidence: 99%

Section: E Compositional Distributionmentioning

confidence: 99%

See 1 more Smart Citation

Distortion in a 7xxx Aluminum Alloy during Liquid Phase Sintering

Yuan

Huo

Schaffer

et al. 2013

Metall Mater Trans A

View full text Add to dashboard Cite

show abstract

“…The Slag and glass contain relatively large amount of Mg element in which, at 900 • C and above, is in the liquid phase. The Mg has a good chemical bond with Fe, and this enables the formation of Mg 3 N 2 on the steel surface possible [18], equations [12,13], as shown.…”

Section: Synthesis Of Ceramic Layer Into Steel Substratementioning

confidence: 97%

“…Moreover, the presence of chromium-based compound offers a superior coating characteristic, as it provides low coefficient friction and residual stress that are used for high wear and corrosion resistance applications [10,11]. Meanwhile, the magnesium-based compound has a high-level of thermal conductivity, hardness, wear, and corrosion resistance properties, and it is commonly used in various applications [12,13].…”

Section: Introductionmentioning

confidence: 99%

Enhancing Corrosion Resistance of High-Carbon Steel by Formation of Surface Layers Using Wastes as Input

Handoko

Pahlevani

Sahajwalla

2019

Metals

View full text Add to dashboard Cite

Series of super-hard ceramic layers have been successfully developed on high carbon steels, with a significant improvement of corrosion resistance and hardness, without changing the original properties, which were derived from mixtures of slag (electric arc furnace), waste glass (bottles), and automotive shredder residue (ASR) plastics (polypropylene) via the single step surface modification technique. Microstructural analysis by laser scanning confocal microscopy (LSCM), crystallography analysis by X-ray diffraction (XRD), micro-level chemical analysis by scanning electron microscopy and energy dispersive spectroscopy (SEM and EDS), and depth profile surface analysis with three-dimensional chemical mapping by time-of-flight secondary ion mass spectrometry (TOF-SIMS), followed by electrochemical corrosion test by the Tafel method and hardness test—Vickers hardness measurement. Three areas have been classified, modified surface, interface, and main substrate areas as the synthesis of ceramic layers into surface of the steels that thermodynamically formed during the heat treatment process. Chemical composition analyses have revealed that generated layers consisting of chromium (Cr)- and magnesium (Mg)-based compound have shown an improved corrosion resistance to 52% and hardness to 70% without modifying the initial volume fraction of constituent phases–martensite and retained austenite. These findings have substantially highlighted to the potential use of waste-integrated inputs as raw materials for production in cost-effective way, concurrently decreasing the demand on new resource for coating, alleviating the disadvantageous impact to the environment from waste disposal in landfills.

show abstract

Enhanced corrosion resistance and reduced cytotoxicity of the AZ91 Mg alloy by plasma nitriding and a hierarchical structure composed of ciprofloxacin‐loaded polymeric multilayers and calcium phosphate coating

Shanaghi

Mehrjou

Chu

2021

J Biomedical Materials Res

View full text Add to dashboard Cite

Much effort has made to lessen the cytotoxicity and enhance the corrosion resistance of biodegradable magnesium alloys, for example, by depositing multilayered polymeric coatings containing hydroxyapatite. In this work, a hierarchical structure composed of ciprofloxacin (Cip)‐loaded on polyacrylic acid (PAA) and poly (ethyleneimine) (PEI) as biocompatible polymeric multilayers and calcium phosphate coating as the top layer is formed by the sol–gel method on the AZ91 Mg alloy with an intermediate layer formed by nitrogen plasma immersion ion implantation. The thicknesses of the multilayered coating and nitrided layer (Mg3N2) are 10 μm and 140 nm, respectively. The corrosion current density decreases by 95.6% and the corrosion potential in the polarization curve shifts to the positive direction by 23%. The passivation process which occurs at defects by deposition of corrosion products mitigates both galvanic and localized corrosion. Slight increase in the contact angle and surface free energy, enhanced corrosion resistance, and reduced cytotoxicity are observed from the multilayered structure. The better corrosion resistance enables better control of release of Cip. Biological assessment indicates that the antibacterial activity against Escherichia coli is improved by 100% after culturing for 24 hr and the cell viability and noncytotoxic behavior of the coated AZ91 are enhanced as well. The corrosion behavior and biological results suggest that the strategy of using a hierarchical structure composed of Cip‐loaded polymeric multilayers in conjunction with an intermediate plasma nitrided layer has large potential in the development of biodegradable orthopedic implants made of Mg alloys.

show abstract

Magnesium nitride phase formation by means of ion beam implantation technique

Abstract: International audienc

Cited by 27 publications

References 23 publications

Distortion in a 7xxx Aluminum Alloy during Liquid Phase Sintering

Distortion in a 7xxx Aluminum Alloy during Liquid Phase Sintering

Enhancing Corrosion Resistance of High-Carbon Steel by Formation of Surface Layers Using Wastes as Input

Enhanced corrosion resistance and reduced cytotoxicity of the AZ91 Mg alloy by plasma nitriding and a hierarchical structure composed of ciprofloxacin‐loaded polymeric multilayers and calcium phosphate coating

Contact Info

Product

Resources

About