Reactive sputter deposition of CoCrCuFeNi in nitrogen/argon mixtures

Dedoncker, Robin; Djémia, Philippe; Radnóczi, G.; Têtard, Florent; Belliard, Laurent; Abadias, G.; Martin, Nicolas; Depla, Diederik

doi:10.1016/j.jallcom.2018.08.044

Cited by 32 publications

(20 citation statements)

References 26 publications

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“…In addition, Young's modulus of the Cu crystal is 114.8 GPa, which is very close to the experimental value of 114 GPa [25] . The hardness of the FeCoCrNiCu HEA calculated by the current simulation is 17.2 GPa, which is slightly higher than the previous experimental result [26] . The corresponding hardness of the single crystal Cu is 11.9 GPa, which is marginally higher than that obtained in Ref.…”

Section: Modelcontrasting

confidence: 75%

See 1 more Smart Citation

Microstructural evolution and mechanical properties of FeCoCrNiCu high entropy alloys: a microstructure-based constitutive model and a molecular dynamics simulation study

Luo

Fang

et al. 2021

Appl. Math. Mech.-Engl. Ed.

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High entropy alloys (HEAs) attract remarkable attention due to the excellent mechanical performance. However, the origins of their high strength and toughness compared with those of the traditional alloys are still hardly revealed. Here, using a microstructure-based constitutive model and molecular dynamics (MD) simulation, we investigate the unique mechanical behavior and microstructure evolution of FeCoCrNiCu HEAs during the indentation. Due to the interaction between the dislocation and solution, the high dislocation density in FeCoCrNiCu leads to strong work hardening. Plentiful slip systems are stimulated, leading to the good plasticity of FeCoCrNiCu. The plastic deformation of FeCoCrNiCu is basically affected by the motion of dislocation loops. The prismatic dislocation loops inside FeCoCrNiCu are formed by the dislocations with the Burgers vectors of $${a \over 6}\left[ {\bar 11\bar 2} \right]$$ a 6 [ 1 ¯ 1 2 ¯ ] and $${a \over 6}\left[ {1\bar 12} \right]$$ a 6 [ 1 1 ¯ 2 ] , which interact with each other, and then emit along the 〈111〉 slip direction. In addition, the mechanical properties of FeCoCrNiCu HEA can be predicted by constructing the microstructure-based constitutive model, which is identified according to the evolution of the dislocation density and the stress-strain curve. Strong dislocation strengthening and remarkable lattice distortion strengthening occur in the deformation process of FeCoCrNiCu, and improve the strength. Therefore, the origins of high strength and high toughness in FeCoCrNiCu HEAs come from lattice distortion strengthening and the more activable slip systems compared with Cu. These results accelerate the discovery of HEAs with excellent mechanical properties, and provide a valuable reference for the industrial application of HEAs.

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Section: Modelcontrasting

confidence: 75%

“…Therefore, as the scale gradually increases, the number of defect types in the workpiece will augment. Another reason for the deviation is that the simulated models here are perfect single crystals, while the experimental workpieces [26][27] contain various defects. The above statements further indicate the accuracy of our MD simulation results.…”

Section: Modelmentioning

confidence: 99%

Microstructural evolution and mechanical properties of FeCoCrNiCu high entropy alloys: a microstructure-based constitutive model and a molecular dynamics simulation study

Luo

Fang

et al. 2021

Appl. Math. Mech.-Engl. Ed.

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“…The classification of HENs is similar with that of HEAs, but HEN materials are more general studied in thin films. HENs films are also based on d-block transition metals (TM), and three classes can be identified according to the origin of their metallic component: (i) the early TMs [2] among groups 4-6, such as, Ti, Zr, Hf, Nb, Ta and W; (ii) the late TM for example, CoCrCuFeNiN [38] ; and (iii) metals from the cross-groups, i.e., combining metals from one or both of the abovementioned two categories with a main-group element (e.g., Al), such as in TiZrNbAlYN [39] or AlCrMoNiTiN [40] . Table 1.1 is a summary of the times of element as constituent for the first class (also referred as refractory HENs) by investigating among 73 latest relevant articles.…”

Section: Multicomponent Nitridementioning

confidence: 99%

“…The second class is 3d-TM multicomponent nitrides, their constituent elements, i.e., late TMs, have much poor nitride-formation ability compared to refractory metals (also seen in Figure 1.1). Even there are a few studies on 3d-TM multicomponent nitride films, for example, (FeCo-NiCrCuAlMn)Nx [41] , (CoCrCuFeNi)Nx [38] and (FeMnNiCoCr)Nx [42] , this direction still requires wider both theoretical and experimental studies. In addition, the abilities of forming nitrides vary with transition metals (Table 1.1 and Fig-ure1.1a), for example, refractory metals in first class have stronger abilities to bond with nitrogen, in particular, when nitrogen is not sufficient.…”

Section: Multicomponent Nitridementioning

confidence: 99%

Nonstoichiometric Multicomponent Nitride Thin Films

Shu

2020

Linköping Studies in Science and Technology. Licentiate Thesis

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High entropy ceramics have rapidly developed as a class of materials based on high entropy alloys; the latter being materials that contain five or more elements in near-equal proportions. Their unconventional compositions and chemical structures hold promise for achieving unprecedented combinations of mechanical, electrical and chemical properties. In this thesis, high entropy ceramic films, (TiNbZrTa)Nx were deposited using reactive magnetron sputtering with segmented targets. The stoichiometry x was tuned with two deposition parameters, i.e., substrate temperature and nitrogen flow ratio fN, their effect on microstructure and mechanical, electric, and electrochemical properties were investigated.

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“…Which it has an impact of retaining the ablated particles and prevent their evaporation from the substrate surface. In case of crystal structure, the nitrogen partial pressure effects the lattice parameters of the films which will be reflected in the crystal structure 26,27 .…”

Section: Introductionmentioning

confidence: 99%

Pulsed laser deposition of Zn(O,Se) layers in nitrogen background Pressure

Abdalla

Bereznev

Spalatu

et al. 2019

Sci Rep

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Zinc oxy-selenide Zn(O,Se) is a novel material, that can replace the toxic CdS buffer layer in thin film solar cells and other optoelectronic devices. In this paper a systematic study of the structural, optical and electrical properties of Zn(O,Se) layers, grown by pulsed laser deposition under 50 mTorr of nitrogen background pressure, over a wide range of the substrate temperature, from RT to 600 °C, is reported. XRD, Raman, HR-SEM, XPS, UV-Vis techniques and Hall effect measurements have been used to investigate the structural, and optoelectronic properties of Zn(O,Se) layers. XRD analysis revealed that the polycrystalline ternary Zn(O,Se) phase formed at 500 °C. Raman analysis confirmed the formation of the polycrystalline Zn(O,Se) phase at 500 °C and an amorphous phase at substrate temperatures below 500 °C. Similarly, XPS analysis accompanied with the modified Auger parameters confirmed formation of ternary Zn(O,Se) layer at 500 °C as well. HR-SEM investigation showed the growth of homogenous, dense and adherent films onto a glass substrate. Furthermore, optical studies revealed that all prepared films are practically transparent in the visible region of the spectrum, with a band gap around 3 eV. Hall effect measurements revealed that conductivity, and electron concentration, increased by four orders of magnitude at 600 °C. It was found, that nitrogen background pressure maintained stable ratios of elemental contents in the whole range of the substrate temperature for Zn(O,Se) layers.

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Reactive sputter deposition of CoCrCuFeNi in nitrogen/argon mixtures

Cited by 32 publications

References 26 publications

Microstructural evolution and mechanical properties of FeCoCrNiCu high entropy alloys: a microstructure-based constitutive model and a molecular dynamics simulation study

Microstructural evolution and mechanical properties of FeCoCrNiCu high entropy alloys: a microstructure-based constitutive model and a molecular dynamics simulation study

Nonstoichiometric Multicomponent Nitride Thin Films

Pulsed laser deposition of Zn(O,Se) layers in nitrogen background Pressure

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