Investigations on the Microstructure of an Aluminium Nitride Layer and Its Interface with the Aluminium Substrate (Part I)

Buchwalder, Anja; Böcker, Jan; Hegelmann, Eugen; Klemm, V.

doi:10.3390/coatings12050618

Cited by 7 publications

(18 citation statements)

References 31 publications

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“…The EDS line scan (figure 4) is repeated 8 times to obtain reliable results, and an average value is plotted. However, due to the limitation of EDS analysis, a complete qualitative analysis is not possible because it is not suitable for the quantitative measurement of light elements, including nitrogen [44]. Due to this, the nitrogen profile is obtained by WDS analysis, as provided in figure 4(c).…”

Section: Resultsmentioning

confidence: 99%

Improved mechanical and wear properties of AISI-420 steel by cathodic cage plasma vanadium nitride deposition

Filho,

Naeem,

Monção

et al. 2023

Phys. Scr.

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In this study, a cathodic cage plasma deposition (CCPD) system equipped with a vanadium cathodic cage is used to deposit vanadium nitride coating on AISI-420 steel. This study aims to improve the tribological and mechanical properties. Specifically, this system is used because it can deposit not only a hard coating but also form a nitrogen diffusion layer that can enhance the load-bearing capacity of the sample and coating adhesion with the substrate. The XRD shows that vanadium nitride (VN) coating is polycrystalline, with a favored orientation along the (200) plane. The SEM results depict that at 673 K, the surface consists of uniformly disseminated spherical nanoparticles agglomerate to form coralloid granular nitrides. At 723 K, polygonal particles are uniformly distributed over the entire surface. The thickness of vanadium nitride films is 0.6 and 1.1 μm for 673 K and 723 K temperatures. The hardness of the sample increased up to 3 times over the untreated sample, whereas mechanical properties, including elastic modulus, and hardness-elastic modulus ratios H/E, H2/E, H3/E2 are upgraded, specifically at 723 K. Remarkably, the wear rates are reduced more than ten times, and a significant decrease in friction coefficient due to the deposition of VN coating. After the ball-on-disc wear analysis, the wear track is smooth and narrow for coated samples and still covered with vanadium and nitrogen elements, which indicates deposited coating is not detached from the substrate. It shows that VN coating can be deposited effectively to enhance the mechanical and tribological properties of AISI-420 steel.

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Section: Resultsmentioning

confidence: 99%

Improved mechanical and wear properties of AISI-420 steel by cathodic cage plasma vanadium nitride deposition

Filho,

Naeem,

Monção

et al. 2023

Phys. Scr.

View full text Add to dashboard Cite

show abstract

“…However, it cannot be ruled out that nitrogen in the diffusion zone combines not only with aluminum but also locally with magnesium, forming magnesium nitride, Mg 3 N 2 [47]. The recent advanced transmission electron microscopy investigations provide the evidence of the Mg 3 N 2 -type magnesium nitride formation in the layers produced in plasma nitrided aluminum-silicon alloy substrate [48].…”

Section: Iron Nitride-aluminum Substrate Systemmentioning

confidence: 99%

“…The recent advanced transmission electron microscopy investigations provide the evidence of the Mg3N2-type magnesium nitride formation in the layers produced in plasma nitrided aluminum-silicon alloy substrate [48].…”

Section: Iron Nitride-aluminum Substrate Systemmentioning

confidence: 99%

Diffusion Nitride Surface Layers on Aluminum Substrates Produced by Hybrid Method Using Gas Nitriding

Tacikowski,

Słoma,

Jakieła

et al. 2024

Metals

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While gas nitriding of steel is currently used in industry, nitriding of aluminum alloys remains an open challenge. The main obstacle is aluminum’s high susceptibility to passivation. The oxide film provides an effective barrier to nitrogen diffusion. Attempts to overcome this problem have mainly focused on glow discharge nitriding using cathode sputtering of an oxide layer. The produced AlN layers exhibit no diffusion zone and show limited performance properties. In this work, the effect of hybrid treatment aimed at producing diffusion layers of nitrides other than AlN on aluminum alloys was investigated on the model system of iron nitride–aluminum substrate. Hybrid treatment combines an electrochemical process involving the removal of the aluminum oxide layer from the substrate, its subsequent iron plating, and a further gas nitriding in high-purity ammonia. The obtained results prove that the hybrid treatment allows the production, at 530 °C/10 h, of diffusion layers of Fe3N iron nitrides on aluminum substrates with a nitrogen diffusion zone range in aluminum of ca. 12 µm. In alloys containing magnesium, its unfavorable effect on the nitrogen diffusion and the functional properties of the layers was observed. An interesting direction for further research is hybrid treatment of precipitation-hardened alloys without magnesium.

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“…Nitriding is a common thermochemical treatment technique used to engineer the surfaces of engineering steels [1][2][3][4][5] and many other metallic materials such as titanium alloys [6,7], aluminum alloys [8,9], nickel-based alloys [10,11] and Co-Cr biomedical alloys [12,13]. In particular, nitriding has long been used in industry to case-harden many steel components such as gears and drive-shafts to improve their performance and durability in real applications [1,2].…”

Section: Introductionmentioning

confidence: 99%

Tribocorrosion Behavior of γ′-Fe4N Nitride Layer Formed on Mild Steel by Plasma Nitriding in Chloride-Containing Solution

Sun

Bailey

2023

Lubricants

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Nitriding has long been used to engineer the surfaces of engineering steels to improve their surface and subsurface properties. The role of the surface compound layer (γ′-Fe4N and/or ε-Fe2-3N) in improving the tribological and corrosion-resistant properties of nitrided steels has been established. However, there have been very few studies on the response of the compound layer to tribocorrosion in corrosive environments. In this work, the tribocorrosion behavior of a 5 μm thick γ′-Fe4N nitride layer produced on mild steel (MS) by plasma nitriding has been studied in a NaCl- containing solution under various electrochemical conditions. The results show that at a cathodic potential of −700 mV (saturated calomel electrode, SCE), where mechanical wear is predominant, the total material removal (TMR) from the γ′-Fe4N layer is 37% smaller than that from the untreated MS, and at open circuit potential, TMR from the layer is 34% smaller than that from the untreated MS, while at an anodic potential of −200 (SCE), the γ′-Fe4N layer can reduce TMR from mild steel by 87%. The beneficial effect of the γ′-Fe4N nitride layer in improving the tribocorrosion behavior of mild steel is derived from its high hardness and good corrosion resistance in the test solution and its ability to resist both mechanical wear and corrosion and to reduce wear–corrosion synergism.

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Investigations on the Microstructure of an Aluminium Nitride Layer and Its Interface with the Aluminium Substrate (Part I)

Cited by 7 publications

References 31 publications

Improved mechanical and wear properties of AISI-420 steel by cathodic cage plasma vanadium nitride deposition

Improved mechanical and wear properties of AISI-420 steel by cathodic cage plasma vanadium nitride deposition

Diffusion Nitride Surface Layers on Aluminum Substrates Produced by Hybrid Method Using Gas Nitriding

Tribocorrosion Behavior of γ′-Fe4N Nitride Layer Formed on Mild Steel by Plasma Nitriding in Chloride-Containing Solution

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