Preparation and properties of plasma sprayed NiAl10 and NiAl40 coatings on AZ91 substrate

Kubatík, Tomáš František; Lukáč, František; Stoulil, J.; Ctibor, Pavel; Průša, Filip; Stehlíková, K.

doi:10.1016/j.surfcoat.2017.03.064

Cited by 14 publications

(9 citation statements)

References 33 publications

(43 reference statements)

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“…Close mechanical properties, especially the elastic modulus, of Mg to natural bone is a unique advantage for Mg compared to conventional metal implants, which are effective in preventing or minimizing stress shielding and osteoporosis. 5,34 Therefore, Mg and its alloys are known as highly suitable materials as degradable implants for various orthopedic applications. 15,37,38 The mechanical and physical properties of Mg alloys and several common bone implant materials are summarized in Table 1.…”

Section: Magnesium Implantsmentioning

confidence: 99%

Improving the corrosion behavior of magnesium alloys with a focus on AZ91 Mg alloy intended for biomedical application by microstructure modification and coating

Akbarzadeh

Ghomi

Ramakrishna

2022

Proc Inst Mech Eng H

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Magnesium alloys such as AZ91 have received much attention due to their attractive properties, including biocompatibility and lightness. Although magnesium is a potential candidate for implant application, due to its rapid degradation in the physiological environment, there are still some challenges to using it as biocompatible implants. In this regard, various techniques such as microstructure modification and coating are utilized to moderate the degradation rate of magnesium alloys. Therefore, efforts are being made to conduct more extensive research to produce magnesium implants with acceptable corrosion resistance. In this literature review, an overview of the history of research on the corrosion behavior, biodegradability, microstructure deformation mechanisms, crystallographic texture in magnesium alloys with a focus on AZ91 Mg alloy, is provided. In addition, the necessity of improving the properties of AZ91 Mg alloy by the two methods of improving microstructure and coating, and existing innovations in these methods are investigated.

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Section: Magnesium Implantsmentioning

confidence: 99%

Improving the corrosion behavior of magnesium alloys with a focus on AZ91 Mg alloy intended for biomedical application by microstructure modification and coating

Akbarzadeh

Ghomi

Ramakrishna

2022

Proc Inst Mech Eng H

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“…Atmospheric plasma spraying (APS) is widely used to prepare metal coatings due to its cost-effectiveness and high deposition rate [6]. Unfortunately, according to previous investigations, NiAl particles are always severely oxidized due to the high temperature and oxide-rich environment during APS [7][8].…”

Section: Introductionmentioning

confidence: 99%

The Influence of Diamond Addition to Ni-Al Powder on Oxidation Behavior of Ni-Al During Plasma Spraying for High Performance Oxide-Free Ni-Al Intermetallic Coating

Zhang

Wang

Liao

et al. 2021

Thermal Spray 2021: Proceedings From the International Thermal Spray Conference

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Ni-Al intermetallics have excellent corrosion and oxidation resistance, but their use in thermal spraying has been limited due to issues with in-flight oxidation. In this study, a novel approach is proposed to remove oxide from Ni-Al droplets in-flight by adding a deoxidizer (diamond) to the feedstock powder. A mixture of nickel, aluminum, and diamond powders was mechanically alloyed using a combination of cryogenic and planetary ball milling. The resulting Ni/Al/diamond composite powder was then plasma sprayed via the APS process, forming Ni-Al coatings on Inconel 738 substrates. Phase composition, microstructure, porosity, and microhardness of the coatings were characterized by X-ray diffraction, scanning electron microscopy, image analysis, and hardness testing, respectively. Oxygen content measurements showed that the coatings contained significantly less oxygen than coatings made from ordinary Ni/Al powders. In-flight particle temperatures were also measured and found to be higher than 2300 °C. The low oxygen content in the coatings is attributed to the in-situ deoxidizing effect of ultrahigh temperature droplets which are also oxide-free.

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“…However, nonnegligible disadvantages, including poor corrosion and wear resistance, impede the further application of Mg alloy. It can be improved by surface treatment technologies, including plasma spraying, electroplating, conversion coating, anodic oxidation, vapor deposition and laser treatment [3][4][5][6], among which laser cladding has considerable superiority: laser beam with high energy density allows fast heating rate and small heat-affected zone, the control to laser energy may limit dilution ratio (2-8 % or less) and reduce the effect of substrate elements on the coating, the fusion of substrate can make sure firm metallurgical bonding between coating and substrate, which make it an excellent method in improving surface performance of magnesium and magnesium alloy.…”

Section: Introductionmentioning

confidence: 99%

Al-WC composite coating on AZ91D Mg alloy by low power pulsed laser cladding

Zhang¹,

Li²,

Liu³

et al. 2020

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Laser cladding coatings were fabricated on AZ91D magnesium alloy using Al and WC powders with a weight percentage ratio of 95 : 5, 90 : 10, and 85 : 15 by a low power pulsed Nd:YAG laser. During the process of laser cladding, most of WC was decomposed. Tiny white granular resultant Al18Mg3W2 was detected in all coatings, while bright white Al4W particles with clustering tendency were found only in the 10 and 15 wt.% WC coatings because of relatively high WC content. α-Al, α-Mg, Al3Mg2, and Al12Mg17 were also detected at the coatings. The hardness of the coatings increased by 3-4 times compared with that of the substrate. The corrosion resistance of the coatings was also improved markedly, mainly the passivation phenomenon was observed in all coatings, which may benefit from the formation of oxidation film Al2O3 • H2O on the surface of the coatings due to high Al concentration.

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Preparation and properties of plasma sprayed NiAl10 and NiAl40 coatings on AZ91 substrate

Cited by 14 publications

References 33 publications

Improving the corrosion behavior of magnesium alloys with a focus on AZ91 Mg alloy intended for biomedical application by microstructure modification and coating

Improving the corrosion behavior of magnesium alloys with a focus on AZ91 Mg alloy intended for biomedical application by microstructure modification and coating

The Influence of Diamond Addition to Ni-Al Powder on Oxidation Behavior of Ni-Al During Plasma Spraying for High Performance Oxide-Free Ni-Al Intermetallic Coating

Al-WC composite coating on AZ91D Mg alloy by low power pulsed laser cladding

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