Effects of CrMnFeCoNi additions on microstructure, mechanical properties and wear resistance of Ti(C,N)-based cermets

Yang, Senlin; Xiong, Ji; Guo, Zhixing; Wu, Biao; Yang, Tianen; You, Qianbing; Liu, Junbo; Deng, Chengjun; Fang, Ding; Gou, Shaoxuan; Yu, Ze; Chen, Sitao

doi:10.1016/j.jmrt.2022.02.021

Cited by 16 publications

(3 citation statements)

References 47 publications

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“…The lattice distortion arose from disparities in elemental lattice parameters and metal leaching. Such substantial lattice distortion can slower the diffusion of atoms, thereby preventing element dissolution and enhancing stability. , Therefore, as a result of the prevention of the catalyst atom leaching via lattice strain caused by lattice disparities and electrochemical evaluation, HEA exhibited high electrochemical stability. Therefore, FeCoNiCuIr is a prominent candidate for use as a cathode catalyst in PEMWE.…”

Section: Resultsmentioning

confidence: 99%

FeCoNiCuIr High-Entropy Alloy Catalysts for Hydrogen Evolution Reactions with Improved Desorption Behavior by Tuning Antibonding Orbital Filling

Choi,

Kwon,

Park

et al. 2023

Energy Fuels

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Proton-exchange membrane water electrolysis (PEMWE) demands highly efficient and stable electrocatalysts for the hydrogen evolution reaction (HER). Noble metals, such as Ir and Pt, are widely employed as HER catalysts as a result of high corrosion resistance and high HER activity under a strong acidic environment. However, as a result of the scarcity and high cost of noble metals, researchers are focusing on developing catalysts with a reduced content of noble metals while enhancing a high catalytic activity per unit mass. Herein, FeCoNiCuIr catalysts were designed using a high-entropy platform to enhance the intrinsic and mass activity. Incorporation of a transition metal (TM) modifies the electronic structure of Ir as a result of charge transfer from the TM to Ir, which optimizes the hydrogen binding energy. FeCoNiCuIr with optimized hydrogen binding energy required a low overpotential of 71 mV at a current density of −10 mA cm −2 . The high mass activity of 3.69 A mg Ir −1 was exhibited in FeCoNiCuIr at the overpotential of 50 mV, which is 92.2% higher than that of the Ir monoelement (1.92 A mg Ir −1). FeCoNiCuIr showed stable performance during chronopotentiometry performed at a constant current density of −100 mA cm −2 for 48 h, demonstrating the excellent durability of the high-entropy alloy (HEA). This study presents the design principle of HEA catalysts capable of improving both activity and durability simultaneously.

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Section: Resultsmentioning

confidence: 99%

FeCoNiCuIr High-Entropy Alloy Catalysts for Hydrogen Evolution Reactions with Improved Desorption Behavior by Tuning Antibonding Orbital Filling

Choi,

Kwon,

Park

et al. 2023

Energy Fuels

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“…-WC-CoCrFeNiMn [10], -SiC-CoCrFeMnNi [11], -TiC-FeCrNiCoAlCu [12; 13], -TiC-FeMnCrNiCo [14], -TiCN-AlCoCrFeNi [15], -TiCN-CoCrFeNiCu [16], -Ti(C,N)-ВЭС на основе (Co, Fe, Ni) [17], -TiCN-CrMnFeCoNi [18], -TiC-CoCrFeNiMe (Me = Mn, Ti, Al) [19].…”

Section: введение введениеmentioning

confidence: 99%

Formation of products upon ignition, combustion and melting of mixtures of high-entropy alloy FeNiCoCrCu with titanium and carbon

Вадченко

Vergunova

Рогачев

et al. 2023

Izv. VUZ. Poroshk. Met.

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The dependence of the ignition temperature, combustion rate and composition of the resulting products on the concentration of Ti + C in mixtures with powder of a high-entropy alloy (HEA) FeNiCoCrCu and the initial mixture of metals forming it (MIX) has been studied. HEA was obtained by mechanical activation (MA) of a mixture of metal powders in argon. At the melting temperature, the high-entropy FeNiCoCrCu alloy decomposes into several phases, but the basis of the HEA alloy, as well as the alloy obtained by melting and crystallizing MIX, is a 5-component phase with an average formula Cu1.2Fe1.4Ni1.4Co1.4Cr. In addition, 5, 4, and 3-component phases with averaged formulas Cu2Ni2Co2Fe2Cr, Cu3Ni3Co2.9Fe2.5Cr, Cu4.8Ni4.5Co4.6Fe4.2Cr, Cu40Fe2Ni4Co2C, Cr12.5Fe3.2Co2.6Ni and Co3.2 Fe3,5 Cr are present in small amounts in the binder. Experiments on the ignition and combustion of mixtures of MIX and HEA with Ti + C were carried out in argon at atmospheric pressure. The combustion rate, ignition temperature, and maximum temperature reached in the thermal explosion of MIX and HEA mixtures with Ti + C increase with increasing Ti + C concentration. Due to the low exothermicity of the mixtures, the experiments were carried out at an initial temperature of 500 °С. At this initial temperature, the combustion limit of the samples occurs when the Ti + C concentration in the HEA and MIX mixtures is less than 30 %. Based on the results of scanning electron microscopy, the volume concentration of the number of titanium carbide (TiC) particles in molten samples was calculated. In an alloy with a HEA binder, the number of TiC particles per unit volume is 1.5-3.0 times greater than in an alloy with a MIX binder, and their size is correspondingly smaller. With an increase in the concentration of Ti + C from 30 to 40 % in a mixture with HEA, the number of TiC particles per unit volume decreases. In a mixture with MIX, the number of TiC particles per unit volume passes through a minimum. This is due to two opposite processes: on the one hand, the probability of the generation of TiC particles increases, on the other hand, their coagulation occurs.

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“…Friction coefficient is an important parameter employed to evaluate the wear resistances of materials [44][45][46]. Figure 5 depicts the friction coefficient (CoF) vs. sliding time for the TC4 material and the four MAO-Cu/Cu-(HEA)N composite coatings at an applied load of 2 N in simulated seawater.…”

Section: Wear Resistancementioning

confidence: 99%

Microstructure and Properties of MAO-Cu/Cu-(HEA)N Composite Coatings on Titanium Alloy

Wang¹,

Li²,

Zhang

et al. 2022

Coatings

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In this paper, MAO-Cu/Cu-(HEA)N composite coatings on TC4 titanium alloy were prepared by combining micro arc oxidation (MAO) with magnetron sputtering (MS) to enhance the wear resistance and antibacterial ability of the substrate in simulated seawater. The number of micropores on the surface of the composite coatings decreased with increasing CuSO4 concentration in the electrolyte, causing the surfaces to be flat and smooth. XPS and EDS analyses revealed that the MAO-Cu/Cu-(HEA)N composite coatings predominately contained TiO2, Cu2O, and (HEA)N. Moreover, the addition of CuSO4 increased the growth rate of the MAO coatings. Comparatively, the MAO-Cu/Cu-(HEA)N composite coating with 5 g/L CuSO4 showed superior wear resistance, reduced friction coefficient (approximately 0.2), and shallow and narrow grinding cracks were observed compared to the other coatings. Antibacterial experiments showed that the MAO-Cu/Cu-(HEA)N composite coatings had better bacterial killing effects than the TC4 substrate, which is of great significance to the antifouling abilities of titanium alloys in marine applications.

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Effects of CrMnFeCoNi additions on microstructure, mechanical properties and wear resistance of Ti(C,N)-based cermets

Cited by 16 publications

References 47 publications

FeCoNiCuIr High-Entropy Alloy Catalysts for Hydrogen Evolution Reactions with Improved Desorption Behavior by Tuning Antibonding Orbital Filling

FeCoNiCuIr High-Entropy Alloy Catalysts for Hydrogen Evolution Reactions with Improved Desorption Behavior by Tuning Antibonding Orbital Filling

Formation of products upon ignition, combustion and melting of mixtures of high-entropy alloy FeNiCoCrCu with titanium and carbon

Microstructure and Properties of MAO-Cu/Cu-(HEA)N Composite Coatings on Titanium Alloy

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