In vitro biocompatibility evaluation of Ti1.5ZrTa0.5Nb0.5Hf0.5 refractory high-entropy alloy film for orthopedic implants: Microstructural, mechanical properties and corrosion behavior

Peighambardoust, Naeimeh Sadat; Alamdari, Armin Asghari; Ünal, Uğur; Motallebzadeh, Amir

doi:10.1016/j.jallcom.2021.160786

Cited by 35 publications

(19 citation statements)

References 47 publications

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“…The existence of oxides on the surface of the HEA electrodes can clearly be attributed to the oxidization of HEA electrodes in the air. 24,48 The peaks of O 1s at 529.8, 531. A summary of the overpotentials and slopes of the Tafel curves for the electrocatalysts is shown in Figure 5c.…”

Section: Characterization Of the Mechanically Alloyed Powdersmentioning

confidence: 99%

“…There is a recently developed category of metallic materials identified as high-entropy alloys (HEAs). They are composed of solid solutions of five or more elements in equiatomic or near-equiatomic proportions. − The characteristics of HEAs are influenced by the high-entropy effect, cocktail effect, and lattice distortion effects, which can be strategically manipulated to enhance the catalytic activity. This involves tuning the composition, combining catalytically active metals, and controlling the electronic structure, particularly the d-band center, to optimize surface energy and promote selective reactivity in catalytic reactions. , The fascinating properties of HEAs, such as their strength and hardness, resistance to wear, stability under heat, and corrosion resistance, have recently attracted considerable attention for various applications. − Preparation and manufacturing methods used for manufacturing HEAs play significant roles in their superior properties.…”

Section: Introductionmentioning

confidence: 99%

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Exploring the Role of Mo and Mn in Improving the OER and HER Performance of CoCuFeNi-Based High-Entropy Alloys

Asghari Alamdari,

Jahangiri,

Yagci

et al. 2024

ACS Appl. Energy Mater.

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High-entropy alloys (HEAs) are a class of metallic materials composed of solid solutions of five or more elements in equi-or near-equiatomic proportions. The fascinating properties of HEAs have recently attracted considerable attention for watersplitting applications. Mechanical alloying (MA) is a method for preparing HEAs that results in crystalline, homogeneous materials at room temperature. In this work, several CoCuFeNi-based HEAs were prepared through MA and evaluated as electrocatalysts for the oxygen evolution reaction (OER), hydrogen evolution reaction (HER), and overall water splitting in 1 M KOH. The results showed that CoCuFeNiMnMo 1.5 with the highest amount of molybdenum exhibited the best OER performance (375 ± 15 mV at the current density of 10 mA cm −2 ), and CoCuFeNiMnMo 0.5 with the lowest amount of molybdenum exhibited the best HER activity with lower overpotentials (275 ± 12 mV at the current density of 10 mA cm −2 ) and over 72 h of stability. The assembled CoCuFeNiMnMo 1.5 (anode)∥CoCuFeNiMnMo 0.5 (cathode) couple required 1.76 V to produce 10 mA cm −2 , and the Faradaic efficiency for generated H 2 was determined to be more than 80%.

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Section: Characterization Of the Mechanically Alloyed Powdersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Exploring the Role of Mo and Mn in Improving the OER and HER Performance of CoCuFeNi-Based High-Entropy Alloys

Asghari Alamdari,

Jahangiri,

Yagci

et al. 2024

ACS Appl. Energy Mater.

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“…Unfortunately, when applied to different substrates, the protective effect of the coating changed significantly and even produced pitting behavior. 148 Because the element melting point of refractory HEA coatings is considerably high, they are usually prone to be prepared by laser cladding, magnetron sputtering, etc. to obtain homogeneous coatings.…”

Section: Corrosion Research and Mechanism Of Hea Coatingsmentioning

confidence: 99%

Review—Corrosion-Resistant High-Entropy Alloy Coatings: A Review

Cheng¹,

Pan²,

Fu³

et al. 2021

J. Electrochem. Soc.

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For a long time, the corrosion problem of materials has been an essential factor in restricting high-tech and national economic development. As an effective means of corrosion protection, surface coatings have drawn extensive attention in the field of material corrosion. Performance improvement and a new composition system of high-entropy alloys (HEAs) have made HEA coatings a research hotspot. HEA coatings inherit the “four core effects” of bulk HEAs, especially high entropy and sluggish diffusion, making high-quality coatings exhibit outstanding corrosion resistance. At present, many reports have focused on the performance of HEA coatings in the field of severe corrosion environments. This article reviews the process parameters and different element contents on the corrosion resistance of HEA coatings in recent years. This paper describes the advantages and excellent corrosion resistance of HEA coatings, including the preparation methods and classification of HEA coatings. Moreover, exploration of the corrosion behavior and the mechanism of HEA coatings are described, and the influence of passivation behavior and microstructure change on the corrosion resistance of HEA coatings are discussed. Finally, the prospect of research on corrosion-resistant HEA coatings is proposed, and possible future research directions and ideas are suggested.

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“…Laser cladding is the most frequently used technology for the manufacturing of HEA coatings [14][15][16]. HEA coatings can also be deposited by plasma cladding [17,18], plasma spray [19][20][21][22][23][24][25][26], thermal spray [27], magnetron sputtering [28][29][30][31][32][33][34][35][36][37], electric arc deposition [38], electron beam physical vapor deposition [39], and vacuum arc deposition [40][41][42][43][44]. The solidification of melted pool during laser cladding and the resulting microstructure can be strongly affected by complete or incomplete GB wetting.…”

Section: Introductionmentioning

confidence: 99%

High Entropy Alloys Coatings Deposited by Laser Cladding: A Review of Grain Boundary Wetting Phenomena

et al. 2022

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High-entropy alloys (HEAs) are called also alloys without a main component or multiprincipal alloys. They consist of five, six or more components in more or less equal proportions and possess unique properties. Several dozens of thousands of publications have already been devoted to bulk HEAs, while HEA coatings are just beginning to develop. More than half of the works on the deposition of HEA coatings are devoted to laser cladding. In the laser cladding process, a mixture of powders on a substrate is melted in a focused laser beam, which sequentially scans the substrate. In the heated zone, the powder mixture melts. At the end of the crystallization process, a solidified polycrystal and a small amount of residual melt are found in the heated zone. It is possible that the grain boundaries (GBs) in the solidified polycrystal are incompletely or fully wetted by this liquid phase. In this way, the GB wetting with a melt determines the morphology and microstructure of HEAs coatings. This review analyzes GB wetting in single-phase HEAs, as well as in HEAs containing two or more phases. We analyze how the HEAs’ composition, laser scanning speed, laser beam power, external magnetic field or ultrasonic impact affect the microstructure and GB wetting. It is also shown how the microstructure and GB wetting change over the thickness of the rather thick as well as multilayer coatings deposited using a laser cladding.

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In vitro biocompatibility evaluation of Ti1.5ZrTa0.5Nb0.5Hf0.5 refractory high-entropy alloy film for orthopedic implants: Microstructural, mechanical properties and corrosion behavior

Cited by 35 publications

References 47 publications

Exploring the Role of Mo and Mn in Improving the OER and HER Performance of CoCuFeNi-Based High-Entropy Alloys

Exploring the Role of Mo and Mn in Improving the OER and HER Performance of CoCuFeNi-Based High-Entropy Alloys

Review—Corrosion-Resistant High-Entropy Alloy Coatings: A Review

High Entropy Alloys Coatings Deposited by Laser Cladding: A Review of Grain Boundary Wetting Phenomena

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