Artykuły w czasopismach: „Ni-Fe alloy”

1

Sato, Hisashi, Yuichi Kubota, Eri Miura-Fujiwara i Yoshimi Watanabe. "Effects of Phase Transformation Temperature on Formation of Wear-Induced Layer in Fe-Ni Alloys". Materials Science Forum 654-656 (czerwiec 2010): 1227–30. http://dx.doi.org/10.4028/www.scientific.net/msf.654-656.1227.

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Effects of the transformation temperature on formation behavior of the wear-induced layer in Fe alloys are investigated using Fe-33mass%Ni and Fe-30mass%Ni alloys. Martensitic transformation temperature (Ms) and reverse transformation temperature (As) of Fe-33mass%Ni alloy are lower than those of Fe-30mass%Ni alloy. Microstructure of the wear-induced layer in Fe-33mass%Ni alloy was single austenite phase (γ) with fine grain. On the other hand, the wear-induced layer in Fe-30mass%Ni alloy consists of martensite (α’) and γ with fine structure. This difference is due to the difference of As between these Fe-Ni alloys. Moreover, the microstructure of the wear-induced layer has no dependence on the distribution of α’ in initial microstructure. From obtained results, it is concluded that the formation of the wear-induced layer in Fe alloys is mainly affected by As.

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Zhang, Jie, Qing Wang, Yingmin Wang, Chunyan Li, Lishi Wen i Chuang Dong. "Revelation of solid solubility limit Fe/Ni = 1/12 in corrosion resistant Cu-Ni alloys and relevant cluster model". Journal of Materials Research 25, nr 2 (luty 2010): 328–36. http://dx.doi.org/10.1557/jmr.2010.0041.

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Minor Fe additions are necessary to enhance the corrosion resistance of commercial Cu-Ni alloys. The present paper aims at optimizing the Fe content in three alloy series Cu90(Ni,Fe)10, Cu80(Ni,Fe)20, and Cu70(Ni,Fe)30 (at.%) from the viewpoint of their corrosion performance in a 3.5% NaCl solution. An Fe/Ni = 1/12 solid solubility limit line was revealed in the Cu-Ni-Fe phase diagram. Three Fe/Ni = 1/12 alloys, Cu90Ni9.23Fe0.77 (at.%) = Cu-8.6Ni-0.7Fe (wt.%), Cu80Ni18.46Fe1.54 = Cu-17.3Ni-1.4Fe, and Cu70Ni27.7Fe2.3 = Cu-26.2Ni-2.1Fe, show the best corrosion performances in their respective alloy series. The Fe/Ni = 1/12 solubility limit is explained by assuming isolated Fe-centered FeNi12 cuboctahedral clusters embedded in a Cu matrix. The three Fe/Ni = 1/12 alloys can be respectively described by cluster formulas [Fe1Ni12]Cu117, [Fe1Ni12]Cu52, and [Fe1Ni12]Cu30.3. The Fe/Ni = 1/12 rule may serve an important guideline in the industrial Cu-Ni alloy selection because above this limit, easy precipitation would negate the corrosion properties of the Cu-Ni-based alloys.

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Chen, Ye Xin, Xi Bei Hou i Tao Chen. "Effect of Degree of Order on Hydrogen Diffusion in (Fe,Ni)₃V Alloys". Materials Science Forum 849 (marzec 2016): 475–81. http://dx.doi.org/10.4028/www.scientific.net/msf.849.475.

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The effect of hydrogen on the mechanical properties of disordered and ordered (Fe,Ni)3V alloys has been investigated. The diffusion behaviors of hydrogen in the disordered and ordered (Fe,Ni)3V alloys were reported. The results showed that the depth of intergranular (IG) fracture on a surface of tensile fracture of (Fe,Ni)3V alloy increased linearly with increasing pre-charging temperature at the same pre-charging time. An apparent hydrogen diffusion coefficient was calculated by the time lag method. The apparent hydrogen diffusion coefficient in the disordered (Fe,Ni)3V alloy was greater than that in the ordered (Fe,Ni)3V alloy. The relationship between the apparent hydrogen diffusion coefficient and pre-charging temperature in (Fe,Ni)3V alloy agreed with Arrhenius equation. The activation energies of apparent hydrogen diffusion in the disordered and ordered (Fe,Ni)3V alloys were 34.6 kJ/mol and 42.2 kJ/mo1, respectively.

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Zhang, Zhaoyang, Yucheng Wu, Anbin Wang, Kun Xu, Xueren Dai, Hao Zhu i Shuai Yang. "A Study on Laser Enhanced Electrodeposition for Preparation Fe-Ni Alloy". Materials 13, nr 16 (12.08.2020): 3560. http://dx.doi.org/10.3390/ma13163560.

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In this paper, a method of laser enhanced electrodeposition is used for preparation of Fe-Ni alloy, which exhibits a significant advantage in fabrication of alloys. The effect of laser energy on Fe-Ni alloy electrodeposition by the manner of reciprocating scanning is studied. Results show that laser irradiation can improve the surface morphology, micro-structure and mechanical properties of Fe-Ni alloy. The results are useful for the development of a new method to synthesize Fe-Ni alloy with better properties.

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5

An, Junyu, Yongjun Shi, Xianfa Li, Jiaxian Chen i Shaowei Wang. "The Effect of Nickel Content on Phase Transition Characteristics of Ni-rich Fe-Ni Elastocaloric Refrigeration Alloys". Journal of Physics: Conference Series 2459, nr 1 (1.03.2023): 012064. http://dx.doi.org/10.1088/1742-6596/2459/1/012064.

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Abstract In order to examine the impact of Ni content on the phase transition properties of Ni-rich Fe-Ni elastocaloric refrigeration alloys, the mechanical alloying (AM) and powder metallurgy (PM) technologies were used to create the Fe-Ni alloys.The results show that similar to the Ni-lacked Fe-Ni alloys, the phase transition characteristics varied with the different of Ni content and displayed various trends. Besides, it was found that the phase change enthalpy reached 44.43J/g when the Ni content was 50% (at%), which was about 1.3 times of Ni-lacked Fe14.6Ni (at%) alloy. In addition, different from the BCC structure with crystal space group of IM-3M (225) of Ni-lacked Fe-Ni alloy, Ni-rich Fe-Ni elastocaloric refrigeration alloys presented the FCC structure with crystal space group of FM-3M (225). This study provides an experimental reference for the preparation and application of Ni-rich Fe-Ni elastocaloric refrigeration content.

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Mi, Guo Fa, Jin Zhi Zhang i Hai Yan Wang. "The Effect of Aging Heat Treatment on the Mechanical Properties of Cu-Al-Fe-(x) Alloys". Key Engineering Materials 467-469 (luty 2011): 257–62. http://dx.doi.org/10.4028/www.scientific.net/kem.467-469.257.

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Alloys were produced by casting of Cu-Al-Fe-Be and Cu-Al-Fe-Ni aluminum bronzes and aged. The microstructures and mechanical properties were evaluated. The results indicated that solution and aging treatment can significantly improve the plasticity of Cu-Al-Fe-Be and Cu-Al-Fe-Ni, while the strength and hardness remained in the quenched level. Extending the aging time can effectively enhance the mechanical properties of alloys, and the longer the aging time, the higher the electric resistance of alloys. According to the results, the mechanical properties of the Cu-Al-Fe-Be alloy can be improved remarkably by solution treatment for 120 min at 950°C, followed by aging treatment for 120 min at 350°C, and quenched. While the most suitable heat treatment for the Cu-Al-Fe-Ni alloy was solution treatment 120 min at 950°C, followed by aging for 120 min at 450°C, and quenched. The experimental result also suggested that the Cu-Al-Fe-Be alloy possessed higher hardness and tensile strength compared to the Cu-Al-Fe-Ni alloy.

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Alharthi, Nabeel, El-Sayed M. Sherif, Hany S. Abdo i S. Zein El Abedin. "Effect of Nickel Content on the Corrosion Resistance of Iron-Nickel Alloys in Concentrated Hydrochloric Acid Pickling Solutions". Advances in Materials Science and Engineering 2017 (2017): 1–8. http://dx.doi.org/10.1155/2017/1893672.

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The effect of Ni content on the resistance against corrosion of Fe-36% Ni and Fe-45% Ni alloys in 1 M hydrochloric acid pickling solution was reported. Various electrochemical and spectroscopic techniques such as potentiodynamic cyclic polarization (CPP), open-circuit potential (OCP), electrochemical impedance spectroscopy (EIS), potentiostatic current-time (PCT), and scanning electron microscopy (SEM), and energy dispersive spectroscopy (EDS) have been employed. CPP measurements indicated that the corrosion current and corrosion rate recorded lower values for the alloy that had higher nickel content. OCP curves proved that the presence of high Ni content shifts the absolute potential to the positive potential direction. EIS results revealed that the surface and polarization resistances were much higher for the alloy with higher Ni content. PCT curves also showed that the absolute currents were lower for Fe-45% Ni alloy. All results were in good agreement with others and confirmed clearly that the corrosion resistance in HCl solutions for Fe-45% Ni alloy was higher than that obtained for Fe-45% Ni alloy.

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Perez-Badillo, Eduardo, Hector J. Dorantes-Rosales, Maribel L. Saucedo-Muñoz i Victor M. Lopez-Hirata. "Analysis of Phase Transformations in Fe-Ni-Al Alloys Using Diffusion Couples of Fe/Fe-33at.%Ni-33at.%Al Alloy/Ni". Metals 13, nr 7 (1.07.2023): 1221. http://dx.doi.org/10.3390/met13071221.

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The present work focused on analyzing the phase transformation in Fe-Ni-Al alloys employing a diffusion couple of Ni/Fe-Ni-Al/Fe, and Calphad-based diffusion and thermodynamic software. Diffusion couples were prepared by annealing at 1100 °C for 200 h and then air-cooled. These couples were also aged at 750 °C for 100 and 275 h. Both numerical and experimental results indicated that the diffusion path between Ni or Fe pure metal and the Fe-33at.%Ni-33at.%Al alloy is not linear. The phases formed during the diffusion anneal at 1100 °C correspond to those shown in the Calphad-calculated Fe-Ni-Al equilibrium diagram. The aging treatment at 750 °C promoted the inverse precipitation β′ → β′ + α, which caused the softening of the alloy. Moreover, the normal precipitation reactions, α→α + β′ and γ → γ + γ′, were also observed to occur during the aging of diffusion couple at 750 °C, originating precipitation hardening.

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Mu'minah, Qonita, Achmad Rochliadi i Aep Patah. "EFFECT OF CRYSTALLINITY TO OVERPOTENTIAL ON Ni₃Fe ALLOY AS ELECTROCATALYST IN HYDROGEN EVOLUTION REACTION". Jurnal Sains Materi Indonesia 21, nr 3 (29.10.2020): 135. http://dx.doi.org/10.17146/jsmi.2020.21.3.5963.

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EFFECT OF CRYSTALLINITY TO OVERPOTENTIAL ON Ni3Fe ALLOY AS ELECTROCATALYST IN HYDROGEN EVOLUTION REACTION. Ni-Fe alloys can be used as electrocatalyst for the hydrogen evolution reaction (HER) in an alkaline solution. HER consumed highly energy and overpotential driven. The overpotential value corresponding to the electron transfer in reaction can be affected either by metal combination or alloy as a cathode. Ni₃Fe alloy had been successfully synthesized by the electrodeposition method using direct-current (DC) on a 304 L type stainless steel substrate. The modified Watts bath deposition was used NiCl2·6H2O and FeCl3·6H2O as precursors of the alloy. The optimum conditions of the reaction were obtained at pH of the solution is 2.20±0.02 with 25 mA/cm² current density at 55 °C for 160 minutes. Ni₃Fe alloy was characterized by Powder X-ray Diffraction (PXRD), Energy-Dispersive X-ray Spectroscopy (EDX), and Scanning Electron Microscopy (SEM). The electrocatalytic property of Ni3Fe alloy was electrochemically measured in 1 M KOH solution by polarization method using a Tafel plot with a scanning rate of 1 mV/s. As a result, the mass ratio of Ni²+ /Fe³+ in bath deposition influenced the electrocatalytic property of Ni₃Fe alloy. Ni₃Fe alloy with a higher crystallinity lowered the overpotential value of HER up to 67% compared to Ni metal.

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10

Okuno, Yu, Yoshiyuki Hattori, Tomonori Ohba, Katsumi Kaneko i Hirofumi Kanoh. "Mesoporous Ni–Fe Alloys". Adsorption Science & Technology 26, nr 8 (październik 2008): 581–88. http://dx.doi.org/10.1260/026361708788059839.

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A nano-structured alloy of Ni and Fe was prepared using poly(vinyl alcohol) (PVA) as a polymer precursor, followed by the reduction of Ni2+ and Fe3+ ions to the corresponding metals by heat treatment of the PVA film containing the metal ions under an inert atmosphere. The alloy obtained was characterized by nitrogen adsorption studies, X-ray diffraction and electron microscopy measurements, and by X-ray photoelectron spectroscopy. The nano-structured alloy had the same crystal structure as that of metallic Ni although metallic Fe formed a different structure. The introduction of Fe atoms caused disorder and less crystallinity in the crystal structure of the alloy, whereas Ni atoms tended to maintain the original crystal structure. Nitrogen adsorption measurements at 77 K showed that the nano-structured Ni–Fe alloy contained mesopores of 4–10 nm in diameter.

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11

Wang, Fei Fei, i Li Li. "Investigation of Ultrasonic Electroplating Ni-P Coatings on Nd-Fe-B Permanent Magnet". Advanced Materials Research 284-286 (lipiec 2011): 980–83. http://dx.doi.org/10.4028/www.scientific.net/amr.284-286.980.

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In order to improve the corrosion resistance of Nd-Fe-B, the new technological process is done which involves electroplating Ni–P alloys with ultrasonic. The influence of ultrasonic on electroplating Ni–P alloy on Nd-Fe-B was studied by using microscope, adhesion test and NaCl solution immersion test. The results showed that the Ni–P alloy deposit on Nd-Fe-B is rough and has poor adhesion without ultrasonic agitation; however, the Ni–P alloy deposit on Nd-Fe-B with ultrasonic agitation has more compact and uniform microstructure, smoother morphology. At the same time, the adhesion and corrosion resistance are greatly enhanced.

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JI, YUNFEI, SHUJIE PANG, CHAOLI MA i TAO ZHANG. "FORMATION OF La-Al-Ni-Cu-Fe BULK METALLIC GLASSES WITH HIGH GLASS-FORMING ABILITY". International Journal of Modern Physics B 24, nr 15n16 (30.06.2010): 2314–19. http://dx.doi.org/10.1142/s021797921006485x.

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The effect of alloy composition on improving glass-forming ability of La -based alloys is investigated in this work. Previous composition criteria demonstrated that the alloys with high glass-forming ability should have negative heats of mixing among the main constituent elements. In this study, the addition of Fe to a La -based La - Al - Ni - Cu alloy significantly improved the glass-forming ability, although the heat of mixing between Fe and the main element La is positive. La - Al - Ni - Cu - Fe bulk metallic glasses with diameters up to 15 mm were prepared by the method of pouring the molten alloys into a copper mold. These La - Al - Ni - Cu - Fe bulk metallic glasses exhibit relatively wide supercooled liquid region of about 50 k, and high T rg (T g /T l ) and γ(T x /(T g +T l )) values. It is found that the addition of Fe to the La - Al - Ni - Cu alloy lowers the Gibbs free energy difference between the liquid and crystalline phases in the supercooled liquid region and enhances the glass-forming ability of the alloy.

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13

Su, Changwei, Linfu Zhao, Liang Tian, Bixia Wen, Mingwu Xiang, Wei Bai i Junming Guo. "Rapid Electrodeposition of Fe–Ni Alloy Foils from Chloride Baths Containing Trivalent Iron Ions". Coatings 9, nr 1 (17.01.2019): 56. http://dx.doi.org/10.3390/coatings9010056.

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This work presents the rapid electrodeposition of Fe–Ni alloy foils from chloride baths containing trivalent iron ions at a low pH (<0.0). The effect of the concentration of Ni2+ ions on the content, surface morphology, crystal structure, and tensile property of Fe–Ni alloys is studied in detail. The results show that the co-deposition of Fe and Ni is controlled by the adsorption of divalent nickel species at low current density and the ionic diffusion at high current density. The current density of preparing smooth and flexible Fe–Ni alloy foils is increased by increasing the concentration of Ni2+ ions, consequently the deposition rate of Fe–Ni alloy foils is increased. For example, at 0.6 M Ni2+ ions, the current density can be applied at 50 A·dm−2, along with a high deposition rate of ~288 μm·h−1.

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Nadutov, V. M., V. M. Garamus, R. Willumeit i Ye O. Svystunov. "Small-Angle Neutron Scattering in F.C.C. Fe-Ni and Fe-Ni-C Alloys". Materials Science Forum 443-444 (styczeń 2004): 251–54. http://dx.doi.org/10.4028/www.scientific.net/msf.443-444.251.

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Small-angle neutron scattering was studied in Invar Fe-Ni-C alloys in comparison with the Fe-Ni alloy. Mössbauer measurement was carried out to indicate magnetic structure. The non-linear SANS curves were analysed using a power law function and the Porod approximation and interpreted in terms of aggregates characterized by smooth surfaces or fractal properties. The size and shape of the inhomogeneities were estimated by using the Indirect Fourier Transformation analysis.

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Danielewski, Marek, Robert Filipek, M. Pawełkiewicz, Dominika Klassek i Krzysztof Jan Kurzydlowski. "Modelling of Oxidation of Fe-Ni-Cr Alloys". Defect and Diffusion Forum 237-240 (kwiecień 2005): 958–64. http://dx.doi.org/10.4028/www.scientific.net/ddf.237-240.958.

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Mathematical model of selective and competitive oxidation of multi-component non ideal alloys is used for modelling oxidation of Fe-Cr-Ni alloys. The model is based on: a) the Danielewski-Holly model of interdiffusion, b) the Wagner model of the Ni-Pt alloy oxidation, c) the postulate that the values of fluxes in reacting alloy are limited (the kinetic constraint) and d) the thermodynamics of the Fe-Ni-Cr system. In this paper for the first time modelling of oxidation of a ternary non-ideal alloy based on Danielewski-Holly model is presented. The model is used to predict the evolution of component distributions in the reacting ternary Fe-Cr-Ni alloy. The results of the modelling of oxidation of the 316L stainless steel at 1173 K are presented. We compute the chromium depletion during the long term oxidation. The results allows to conclude that the oxidation reaction is limited by interdiffusion in reacting alloy. The computations demonstrate that the chromium depletion is the key factor affecting the scale stability during the long time exposition.

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Zhikhareva, Irina, Natalya Smirnova, Vadim Schmidt i Oleg Vorobyev. "Improving Producing Characteristics of Constructions through FE-NI and FE-NI-CR Alloy Coatings with a Given Structure". Materials Science Forum 871 (wrzesień 2016): 16–21. http://dx.doi.org/10.4028/www.scientific.net/msf.871.16.

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The article considers innovative materials that are recommended to be used as a coating for reinforcement of bearing structures of high-rise buildings, bridges, tunnels and underground structures, and as a coating for storagetanks of crude oil instead of high-alloy steel grades 20H23N18, 08H18N10. Nanostructural alloy coating Fe-Ni (> 80% Fe) and alloy coating Fe-Ni-Cr (> 70% Fe), containing in addition to α-Fe a new phase ε-Fe with hexagonal close-packed lattice (GPUr) were obtained by high frequency periodic current at atmospheric pressure and room temperature. Existence of phase ε-Fe was confirmed by X-ray diffraction method, electron-probe test with an electronic probe, scanning atomic force microscopy. Phase transition α-Fe → ε-Fe was observed in the deposition process. A special feature of this phase is the presence of a nanocrystal structure. The main factors in the formation of the hexagonal system are the frequency and duty cycle. The maximum number of ε-Fe phase in the Fe-Ni alloy is 30% and the alloy Fe-Ni-Cr is 20%. This phase has an essential effect on the producing characteristics of the studied coatings. Due to the corrosion resistance in the chloride ions environment Fe-Ni alloy deposited by a high frequency alternating current is 7.5 times greater than high-alloy steel 20X23H18 and 08H18N10. Additionally the nanostructure plated with Fe-Ni-Cr alloy coating made possible to increase its microhardness. Fe-Ni alloy coating can be used as coatings for storage tanks of crude oil and Fe-Ni-Cr alloy coating can be recommended to harden the supporting structures of high-rise buildings, bridges, tunnels and underground structures.

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Arabi, S., G. Avramovic-Cingara, G. Palumbo, Uwe Erb i M. Niewczas. "Characterization of Magnetic Properties of Nanocrystalline Ni and Ni-15%Fe Alloy". Materials Science Forum 706-709 (styczeń 2012): 1642–46. http://dx.doi.org/10.4028/www.scientific.net/msf.706-709.1642.

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Magnetic properties of nanocrystalline Ni and Ni-Fe alloys produced by electrodeposition have been studied at 2K and at 298K. Ni and Ni-15%Fe alloy deposits show nano-grain structure with the average grain size of 23 nm and 12 nm, respectively. Both materials exhibit soft magnetic properties. Nanocrystalline Ni at 2K shows saturation magnetization, coercive force, and remanent magnetization of 57 emu/gr, 101 Oe, and 16 emu/gr respectively. Nanocrystalline Ni-15%Fe alloy exhibits superior soft magnetic properties than Ni with corresponding saturation magnetization, coercive force, and remanent magnetization at 2K of 96 emu/gr, 6 Oe, and 4 emu/gr respectively. The magnetic properties and their dependence upon temperature data are interpreted in terms of the Herzer random anisotropy model for nanocrystalline materials.

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18

Sukhova, О. V., V. A. Polonskyy i К. V. Ustinovа. "Structure Formation and Corrosion Behaviour of Quasicrystalline Al–Ni–Fe Alloys". Фізика і хімія твердого тіла 18, nr 2 (15.06.2017): 222–27. http://dx.doi.org/10.15330/pcss.18.2.222-227.

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The formation of quasicrystalline decagonal phase and related crystalline phases was investigated by a combination of optical metallography, powder X-ray diffraction, atomic absorption spectroscopy and differential thermal analysis. Corrosion behaviour of quasicrystal Al–Ni–Fe alloys was studied by gravimetric and potentiodynamic polarization experiments in saline and acidic solutions at room temperature. The decagonal phase exhibits two modifications (AlFe- and AlNi-based) depending on the composition. In Al72Ni13Fe15 alloy it coexists with monoclinic Al5FeNi phase. In Al71.6Ni23Fe5.4 alloy crystalline Al13(Ni,Fe)4, Al3(Ni,Fe)2, and Al3(Ni,Fe) phases are seen adjacent to the quasicrystalline decagonal phase. Stability of quasicrystal phase up to room temperature was shown to be connected with its incomplete decomposition during cooling at a rate of 50 K/min. Al72Ni13Fe15 alloy has more than twice larger volume fraction of this phase compared to that of Al71.6Ni23Fe5.4 alloy. A dependence of microhardness on composition was observed as well, with Al72Ni13Fe15 alloy having substantially higher values. In acidic solutions, Al71.6Ni23Fe5.4 alloy showed the best corrosion performance. In saline solutions, the investigated alloys remained mainly untouched by corrosion. Mass-change kinetics exhibited parabolic growth rate.

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Zhou, Z. C., Q. Z. Wang, J. Du, Y. J. Yan, S. Y. Gu i H. Yang. "Microstructures and Damping Properties in Ni-Al-Based Alloys". Advanced Materials Research 581-582 (październik 2012): 440–43. http://dx.doi.org/10.4028/www.scientific.net/amr.581-582.440.

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The binary Ni-rich Ni64Al36 (nominal compositions, all compositions are in atomic percent unless otherwise stated,) alloy and ternary Ni-21.2 Al-20 Fe alloy ingot were prepared by melting commercial pure Ni and pure Al in a vacuum arc furnace under an argon atmosphere. The ingots were then hot rolled into a rectangle with the length of 55 mm. The microstructures of Ni-Al-based alloys were investigated using optical microscope and X-ray diffraction. The damping capacity of oil-quenched ternary Ni-21.2 Al-20 Fe alloy from different temperature is investigated using a multifunctional internal friction apparatus.

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Hernandez-Santiago, Felipe, I. Espinoza-Ramirez, Victor M. Lopez-Hirata, Maribel L. Saucedo-Muñoz, Lucia Díaz-Barriga Arceo i H. J. Dorantes-Rosales. "Phase Decomposition in Isothermally Aged MA Cu-Ni-Fe and Cu-Ni-Cr Alloys". Advanced Materials Research 15-17 (luty 2006): 678–83. http://dx.doi.org/10.4028/www.scientific.net/amr.15-17.678.

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Supersaturated solid solutions of Cu-44.5at.%Ni-22.5at.%Fe and Cu-37at.%Ni-6at.%Cr alloy were produced by ball milling of a pure chemical elemental mixture for 1080 ks. Two fcc supersaturated solid solutions with a grain size of about 20 and 50 nm, respectively, were obtained after milling. These alloys were subsequently aged at temperatures between 800 and 1003 K for different times. The aging promoted the phase decomposition of the supersaturated solid solution into a mixture of Cu-rich and Ni- phases in both the aged MA alloy powders. The growth kinetics of the modulation wavelength was determined from the X-ray diffraction results and followed the Lifshitz-Slyozov- Wagner theory for a diffusion-controlled coarsening in the mechanically-alloyed Cu-Ni-Fe alloy after aging. However, the sidebands intensity seems to be very low and overlapped with the peaks corresponding to the Cu-rich phase in the aged mechanically-alloyed Cu-Ni-Cr alloy. The growth kinetics of composition modulation wavelength for the aged MA Cu-Ni-Fe alloy was faster at 803 and 898 K than that for the same alloy composition obtained by a conventional processing and then aged at the same temperatures.

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FENG, YAN, JIEHE SUI, ZHIYONG GAO i WEI CAI. "INVESTIGATION ON MARTENSITIC TRANSFORMATION AND MECHANICAL PROPERTIES OF THE Ni50Mn37-xSn13Fex (x=0, 2, 5, 10) ALLOYS". International Journal of Modern Physics B 23, nr 06n07 (20.03.2009): 1803–8. http://dx.doi.org/10.1142/s0217979209061652.

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The microstructures, martensitic transformation behavior and mechanical properties of Fe -doped Ni - Mn - Sn ferromagnetic shape memory alloys are investigated. The influence of composition on the precipitation of second phase and the improvement of ductility are also explained in this paper. The results show that the phase transformations of Ni - Mn - Sn - Fe alloys are still one-step thermo-elastic transformation. The transformation temperatures increase with the increase of Fe content, and the hysteresis decreases after being doped Fe element, this is mainly due to the difference of atom size and the precipitation of second phase. After homogeneously annealing at 1123K for 12h, the Ni 50 Mn 35 Sn 13 Fe 2 alloy becomes single phase due to the solid solubility of Fe . The breaking strength and maximum compressive strain increase with the increase of doped Fe content due to the solid solution strengthening and second phase strengthening. The fracture of the Ni - Mn - Sn alloy is intergranular crack, and becomes transgranular crack after doping Fe element. The ductility is improved by this means, which is in favour of the application of the Ni - Mn - Sn alloys.

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Qi, Zhifeng, Yanji Chao, Ruochao Wang, Jixue Zhou i Hongtao Liu. "Effects of Fe and Ni on the Microstructure and High Temperature Tensile Properties of Al-Si Aluminium Alloys". Journal of Physics: Conference Series 2510, nr 1 (1.06.2023): 012003. http://dx.doi.org/10.1088/1742-6596/2510/1/012003.

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Abstract The effects of varied contents of Ni (1.2 wt.%, 1.6 wt.%) and Fe (0.6 wt.%, 0.8 wt.%) on the microstructure and high temperature mechanical properties of Al-Si alloy were studied using scanning electron microscope (SEM), energy dispersive X-ray spectroscopy (EDS) and tensile testing machine. The experimental results demonstrate that Ni element plays a crucial role in modifying the Fe-rich phase type, morphology and distribution in the Al-Si alloy. The addition of 1.2 wt.% Ni and 0.6 wt.% Fe could generate a Chinese script Fe-rich strengthening phase in Al-Si alloy. Further increasing to 1.6 wt.% Ni and 0.8 wt.% Fe, the long needle-shape Fe-rich phase was detected. High temperature tensile properties of the alloy were significantly improved, because of the Chinese script Fe-rich strengthening phase in the Al-Si alloy containing 1.2 wt.% Ni and 0.6 wt.% Fe. The ultimate tensile strength (UTS) of Al-Si alloy with 1.2 wt.%Ni-0.6 wt.% Fe is up to 229 MPa, 174 MPa and 139 MPa at 250 °C, 300 °C and 350 °C, respectively.

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Cui, Jiang, Zhang i Liu. "Low-Temperature Induced Martensitic Transformation Enhancing Mechanical Properties of Metastable Fe-Ni-P Alloy". Metals 9, nr 7 (14.07.2019): 785. http://dx.doi.org/10.3390/met9070785.

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The metastable Fe-Ni-P alloy with phosphorus (P) solid-solution structure has been fabricated by spark plasma sintering. Its face-centered cubic (FCC) matrix without the precipitation of phosphide attains a high plasticity and an excellent strain hardening ability at room temperature. This Fe-Ni-P alloy is subjected to cryogenic treatment at various temperatures (−20 °C and −50 °C), to investigate the role of phosphorus on the microstructural evolution and mechanical properties of γ-(Fe-Ni) alloy at low temperatures. The results indicate that the addition of phosphorus can destabilize the Fe-Ni-P alloy and facilitate its martensitic transformation during cryogenic treatment. P-doping does not lead to obvious embrittlement of Fe-Ni-P alloy at low temperatures, but strengthens the alloy by promoting microstructure evolution. The Fe-Ni-P alloy has high plasticity and good strain hardening ability after treated at −20 °C, and is converted to acicular martensite structure after being treated at −50 °C, resulting in a significant increase in its hardness (433 HV) and compressive yield strength (1271 MPa). Developing this Fe-Ni-P alloy as a load-bearing component for low-temperature conditions shows great promise.

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Nascimento, Maurício Silva, Givanildo Alves dos Santos, Rogério Teram, Vinícius Torres dos Santos, Márcio Rodrigues da Silva i Antonio Augusto Couto. "Effects of Thermal Variables of Solidification on the Microstructure, Hardness, and Microhardness of Cu-Al-Ni-Fe Alloys". Materials 12, nr 8 (18.04.2019): 1267. http://dx.doi.org/10.3390/ma12081267.

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Aluminum bronze is a complex group of copper-based alloys that may include up to 14% aluminum, but lower amounts of nickel and iron are also added, as they differently affect alloy characteristics such as strength, ductility, and corrosion resistance. The phase transformations of nickel aluminum–bronze alloys have been the subject of many studies due to the formations of intermetallics promoted by slow cooling. In the present investigation, quaternary systems of aluminum bronze alloys, specifically Cu–10wt%Al–5wt%Ni–5wt%Fe (hypoeutectoid bronze) and Cu–14wt%Al–5wt%Ni–5wi%Fe (hypereutectoid bronze), were directionally solidified upward under transient heat flow conditions. The experimental parameters measured included solidification thermal parameters such as the tip growth rate (VL) and cooling rate (TR), optical microscopy, scanning electron microscopy (SEM) analysis, hardness, and microhardness. We observed that the hardness and microhardness values vary according to the thermal parameters and solidification. We also observed that the Cu–14wt%Al–5wt%Ni–5wi%Fe alloy presented higher hardness values and a more refined structure than the Cu–10wt%Al–5wt%Ni–5wt%Fe alloy. SEM analysis proved the presence of specific intermetallics for each alloy.

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Cacciamani, G., J. De Keyzer, R. Ferro, U. E. Klotz, J. Lacaze i P. Wollants. "Critical evaluation of the Fe–Ni, Fe–Ti and Fe–Ni–Ti alloy systems". Intermetallics 14, nr 10-11 (październik 2006): 1312–25. http://dx.doi.org/10.1016/j.intermet.2005.11.028.

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Ping, Li, Xu Jiayuan i Zhou Shaomin. "STUDIES ON Ni-Fe ALLOY CODEPOSITION". Acta Physico-Chimica Sinica 5, nr 06 (1989): 693–98. http://dx.doi.org/10.3866/pku.whxb19890610.

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Danilchenko, V. E., i A. V. Nedolya. "Austenite Stabilization of Fe-Ni Alloy". Acta Physica Polonica A 86, nr 4 (październik 1994): 617–20. http://dx.doi.org/10.12693/aphyspola.86.617.

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Srimathi, S. N., i S. M. Mayanna. "Electrolytic preparation of Fe-Ni alloy". Journal of Materials Science Letters 4, nr 7 (lipiec 1985): 904–7. http://dx.doi.org/10.1007/bf00720535.

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Zhu, Zengwei, Yongliang Guo, Zhongjiang Jiang i Xiaocong Tang. "Study on microstructure and properties of mechanically electrodeposited nanocrystalline Fe-Ni alloy". Integrated Ferroelectrics 201, nr 1 (2.09.2019): 241–48. http://dx.doi.org/10.1080/10584587.2017.1338499.

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Fe-Ni alloys were prepared by electrodeposition process assisted with mechanical polishing and analyzed by comparison with the traditional electrodeposition process. The results showed that mechanical polishing can significantly affect the crystalline growth and grain refinement resulted. Simultaneously the polishing can significantly enhance the micro-hardness and reduce the thermal expansion coefficient (TEC) of the electrodeposited Fe-Ni alloy. Both micro-hardness and thermal expansion coefficient decrease with increase of current density due to the grain coarsen. A promising technology for achieving Fe-Ni alloy with low TEC and high strength can be expected.

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Garimella, N., M. P. Brady i Yong Ho Sohn. "Ternary and Quaternary Interdiffusion in γ (fcc) Fe-Ni-Cr-X (X = Si, Ge) Alloys at 900°C". Materials Science Forum 595-598 (wrzesień 2008): 1145–52. http://dx.doi.org/10.4028/www.scientific.net/msf.595-598.1145.

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Interdiffusion in Fe-Ni-Cr (fcc γ phase) alloys with small additions of Si and Ge at 900°C was studied using solid-to-solid diffusion couples. Alloy rods of Fe-24 at.%Ni, Fe-24 at.%Ni- 22at.%Cr, Fe-24 at.%Ni-22at.%Cr-4at.%Si and Fe-24 at.%Ni-22at.%Cr-1.7at.%Ge were cast using arc-melt, and homogenized at 900°C for 168 hours. Sectioned alloy disks from the rods were polished, and diffusion couples were assembled with in Invar steel jig, encapsulated in Argon after several hydrogen flushes, and annealed atz 900°C for 168 hours. Polished cross-sections of the diffusion couples were characterized to determine experimental concentration profiles using electron probe microanalysis with pure elemental standards. Interdiffusion fluxes of individual components were calculated directly from the experimental concentration profiles, and the moments of interdiffusion flux profiles were examined to determine the average ternary and quaternary interdiffusion coefficients. Effects of alloying additions on the interdiffusional behavior of Fe-Ni- Cr-X alloys at 900°C are presented with due consideration for the formation of protective Cr2O3 scale.

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PI, DONG HYOUK, KI BUEM KIM, JIN MAN PARK, JUN HEE HAN i DO HYANG KIM. "MICROSTRUCTURAL EVOLUTION AND MECHANICAL PROERTIES OF Ti-(Ni, Fe)-Sn ULTRAFINE EUTECTIC ALLOYS". International Journal of Modern Physics B 23, nr 06n07 (20.03.2009): 953–59. http://dx.doi.org/10.1142/s0217979209060294.

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Ultrafine eutectic alloys have been developed in Ti - Ni , Ti - Fe and Ti -( Ni , Fe )- Sn alloys. The Ti 76 Ni 24 and ( Ti 74 Ni 26)97 Sn 3 ultrafine eutectic alloys consist of a mixture of α- Ti and Ti 2 Ni phases, and β- Ti ( Sn ) and Ti 2 Ni phases, respectively, whereas the Ti 70.5 Fe 29.5 and ( Ti 70.5 Fe 29.5)97 Sn 3 alloys are composed by a mixture of β- Ti ( Sn ) and FeTi phases with relatively spherical colony. The compression tests of Ti 76 Ni 24, ( Ti 74 Ni 26)97 Sn 3 and Ti 70.5 Fe 29.5 ultrafine eutectic alloys reveal a strength of 1400 ~ 1800 MPa with very limited plastic strain of 0.1 ~ 1%. On the contrary, a ( Ti 70.5 Fe 29.5)97 Sn 3 alloy exhibits high strength of 2270 MPa with enhanced plastic strain of 3.1%. Based on these results, it is feasible to suggest that the eutectic morphology and interfacial coherency between the Ti solid solution and intermetallic phases influence to control the macroscopic plasticity of the Ti - Ni and Ti - Fe ultrafine eutectic alloys.

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Kim, Ji Hui, Kwang Su Na i Seon Jin Kim. "The Cavitation Behavior of Fe-Cr-C-Si-Ni Alloys". Materials Science Forum 510-511 (marzec 2006): 274–77. http://dx.doi.org/10.4028/www.scientific.net/msf.510-511.274.

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The cavitation erosion behavior of Fe-Cr-C-Si-xNi (x = 1, 2 and 3 wt.%) alloys were investigated for 50 hours using a 20 kHz vibratory cavitation erosion test equipment. 1 wt.% Ni added Fe-based hardfacing alloy showed excellent cavitation erosion resistance, comparable to the stellite 6. Above 1 wt.% Ni, however, the erosion resistance deteriorated quickly. It is conjectured that Ni addition above 1 wt.%, which has been shown to increase the stacking fault energy (SFE), resulted in reduction of the work hardening rate during the erosion test. Therefore, the enhanced cavitation erosion resistance of the 1 wt.% Ni alloy over the 2 and 3 wt.% Ni alloys could be explained in terms of the SFE, Ms temperature and work hardening.

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Mi, Guo Fa, Jin Zhi Zhang, San Lei Lv i Ping Wang. "The Effect of Aging Heat Treatment on the Sliding Wear Behavior of Cu-Al-Fe-(x) Alloys". Advanced Materials Research 219-220 (marzec 2011): 195–201. http://dx.doi.org/10.4028/www.scientific.net/amr.219-220.195.

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Wear behaviour of aged casting Cu-Al-Fe-Be and Cu-Al-Fe-Ni aluminum bronzes was studied in this paper. The microstructures, mechanical properties of hardness and tensile strength, were evaluated experimentally. The friction and wear resistance, and the electrical resistivity of the materials were assessed. The results show that mechanical properties of the Cu-Al-Fe-Be alloy have been improved by solution treatment at 950°C for 120 min followed by aging at 350°C for 120 min, whilst the most suitable heat treatment for the Cu-Al-Fe-Ni alloy was solution treatment at 950°C for 120 min followed by aging at 450°C for 120 min. In the wear testing, the as-cast alloys was dominated by abrasive wear, and the increase in load and sliding velocity, the adhesive wear and oxidation wear dominated. The experimental results also showed that the Cu-Al-Fe-Be alloy possessed higher hardness and tensile strength, lower friction coefficient and lower wear rate compared to the Cu-Al-Fe-Ni alloy.

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Chen, Shanshan, Zicheng Huang i Zhizhang Chai. "Thermodynamic Calculation of 2618 High Performance Aluminum Alloy". Journal of Physics: Conference Series 2557, nr 1 (1.07.2023): 012042. http://dx.doi.org/10.1088/1742-6596/2557/1/012042.

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Abstract The thermodynamic-related physical parameters, precipitation amount of equilibrium phase, and initial precipitation temperature of Al-(1.9–2.5) Cu-(1.2–1.8) Mg-(0.9–1.5) Fe-(0.9–1.5) Ni alloy were simulated by using the thermodynamic simulation software JMat-Pro. The results show that with the change of element content, the liquidus temperature is in the range of 641.92–638 °C. The precipitation transition temperature of the eutectic phase with a low melting point ranges from 515 °C to 517.25 °C. The solidus temperature is closely related to Cu/Mg. The dendrite spacing decreases with the increase of Mg and Fe (Ni) contents, among which Mg has the greatest influence, followed by Fe (Ni) and Cu. The partial molar Gibbs free energy of Cu, Mg, Fe, and Ni is negative. The activity of Mg increases with the decrease in temperature, and the maximum activity is 0.10189, while the activities of Cu, Fe, and Ni are close to 0. The initial precipitation temperatures of S(Al2CuMg) and Al9FeNi phases are 424–450 °C and 635.4–643.01 °C, respectively. The initial precipitation temperature of the Al9FeNi phase decreases with the increase of Cu and Mg contents, while it increases with the increase of Fe (Ni) contents. With the increase of Cu and Mg contents, the initial precipitation temperature of S(Al2CuMg) increases and decreases with the increase of Fe (Ni) contents. The precipitation amount of S(Al2CuMg) mainly depends on the content and ratio of Cu and Mg, while that of Al9FeNi increases with the increase of Fe and Ni elements in the same proportion.

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Chen, Yu, Yang Yu, Wen Cong Zhan i Er De Wang. "Nanocrystalline Ni-30wt%Fe Supersaturated Solid Solution Synthesized by Mechanical Alloying". Applied Mechanics and Materials 490-491 (styczeń 2014): 38–42. http://dx.doi.org/10.4028/www.scientific.net/amm.490-491.38.

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Ni-30wt%Fe elemental power mixture was mechanically milled under argon atmosphere for variuos times up to 25h.The evolution of Ni-Fe alloying during milling and the microstructure of the as-milled powders were characterized by XRD, EPMA (electron probe microanalysis), SEM and TEM, respectively. The results show that nanocrystalline Ni (Fe) supersaturated solid solution alloy powders with 30wt. % Fe in composition can be synthesized by mechanical milling of the elemental powder mixture. Both the content of Fe dissolved and the microstrain developed in the as-synthesized Ni (Fe) solid solution phase increase, while the crystallite size decreases, steadily with increasing milling time. In particular, the Ni-30wt%Fe alloy powders obtained by 25h milling consist of a single Ni (Fe) supersaturated solid solution phase with average crystallite size of about 15nm and accumulated microstrain as high as 1.12%. DSC tests show that the nanocrystalline Ni-30wt%Fe alloy powders have a lower melting temperature than the elemental powder mixture, attributed to the unique Ni (Fe) solid solution phase structure, the nanocrystallization, and the high strain energy.

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Tung, I.-Chung, Jyh-Shinn Yang i andTsung-Shune Chin. "Fe or Ni–Fe Alloy Coated Barium Ferrite Particles". Japanese Journal of Applied Physics 37, Part 1, No. 12A (15.12.1998): 6378–83. http://dx.doi.org/10.1143/jjap.37.6378.

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Nagai, Yasuhiro, Masakatsu Senda i Tomoyuki Toshima. "XPS Investigations of Ni-Fe Alloy and Fe Films". Japanese Journal of Applied Physics 26, Part 2, No. 7 (20.07.1987): L1131—L1134. http://dx.doi.org/10.1143/jjap.26.l1131.

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Lee, Dong Won, Hak Sung Lee, Shun Myung Shin i Jei Pil Wang. "Nickel Recycling by Magnesium Reaction of Fe-Ni Alloy Scrap". Advanced Materials Research 1025-1026 (wrzesień 2014): 519–24. http://dx.doi.org/10.4028/www.scientific.net/amr.1025-1026.519.

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Ni recycling from Fe-Ni alloy scrap was successfully performed by Mg reaction and distilling process. Ni component in Fe-Ni alloy scraps dissolve selectively in molten magnesium metal and then vacuum distilling was applied to remove Mg from Mg-Ni liquid. Above 1,073K in dissolving stage, more than 99% Ni from scraps was recovered and under the distilling process at 1,273K, 10-5 torr, the high quality Ni with 99.5% could be obtained. This study suggests the recycling process of Ni in Fe-Ni scrap with the combination of Mg reaction and distilling process.

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Guan, Pingping, Aimin Liu, Zhongning Shi, Xianwei Hu i Zhaowen Wang. "Corrosion Behavior of Fe-Ni-Al Alloy Inert Anode in Cryolite Melts". Metals 9, nr 4 (1.04.2019): 399. http://dx.doi.org/10.3390/met9040399.

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Fe-Ni-based alloys are promising materials of inert anodes for use in aluminum electrolysis and adding Al can further improve the corrosion resistance. Fe-Ni-Al alloys with 1.4–8.6 wt.% Al were prepared by vacuum melting, and their corrosion as anodes during the production of pure Al (98.14–99.68%) by electrolysis was studied in a melt of NaF-AlF3-NaCl-CaF2-Al2O3 at 850 °C. The corrosion layer on the anode contains fluorine salt that corrodes the oxide film, and the inner layer is Ni-enriched while the outer layer is enriched with Fe and O due to the preferential oxidation of Fe. The electrolytically deposited oxide films on Fe-Ni-Al alloys with different compositions contains Fe2O3, Fe3O4, NiO, Al2O3, FeAl2O4, NiFe2O4, and other protective oxides, making the alloys very corrosion-resistant. The linear voltammetric curves can be divided into three parts: active dissolution, passivation transition, and over-passivation zones. The alloy with 3.9 wt.% Al (57.9Fe-38.2Ni-3.9Al) has a relatively negative passivation potential, and therefore, is easier to become passivated. According to the Tafel curve, this alloy shows a relatively positive corrosion potential as anode (1.20 V vs. Al/AlF3), and thus can form a protective film.

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Карькин, И. Н., Л. Е. Карькина, Ю. Н. Горностырев i А. П. Коржавый. "Кинетика ранних стадий распада в разбавленном ОЦК-сплаве Fe-Сu-Ni-Al: MC + MD-моделирование". Физика твердого тела 61, nr 4 (2019): 724. http://dx.doi.org/10.21883/ftt.2019.04.47420.326.

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AbstractA combined approach including the Monte Carlo and molecular-dynamics simulation, decomposition kinetics and segregation formation in the multicomponent low-alloy Fe–1.5Cu–2Ni–1.5Al (at %) alloy is studied. It is shown that the formation of Cu nanoparticles surface-enriched with Ni and Al (coprecipitation mode) includes several stages: (i) the formation of clusters consisting of several Cu atoms, (ii) their enrichment with Ni and Al atoms, and (iii) redistribution of Ni and Al atoms with the formation of a surface layer providing stabilization of Cu nanoparticles. Observed structural features of segregations and their stability in Fe–Cu–Ni–Al alloys is discussed.

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HE, FANG, JUNJIAO LI, LIANG CHEN, LIXIA CHEN i YUAN HUANG. "FABRICATION AND CHARACTERIZATION OF NOVEL Fe–Ni ALLOY COATED CARBON FIBERS FOR HIGH-PERFORMANCE SHIELDING MATERIALS". Surface Review and Letters 22, nr 02 (kwiecień 2015): 1550028. http://dx.doi.org/10.1142/s0218625x15500286.

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Novel Fe – Ni alloy coated carbon fibers ( Fe – Ni – CFs ) were prepared via two-step electrodeposition with an initial synthesis of Fe coatings on the activated carbon fibers and followed by the co-deposition of Fe and Ni. The effect of annealing treatment on structure and properties of Fe – Ni – CFs was studied through SEM, TEM, XRD and VSM. The results indicated that the Fe – Ni alloy coatings with the thickness of only 0.25 um are highly wrapped on the surface of carbon fibers. The un-annealed coatings showed high saturation magnetization values with 52 dB from 300–1200 MHz, which mainly due to Fe content (18.4 wt.%) of the coatings meets the requirements of high magnetic perm-alloy. The surface quality, crystallinity and conductivity of the Fe – Ni – CFs were obviously improved despite of the reduction of the saturation magnetization resulted from the bigger grains after annealing. Based on the above aspects, annealing at 400∘C was preferred for the Fe – Ni – CFs to obtain good comprehensive performance. Importantly, the Fe – Ni – CFs filled ABS resin composites showed better Electromagnetic Interference shielding effectiveness than the CFs reinforced ABS composites.

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Raimundo, Rafael A., Vinícius D. Silva, Luciena S. Ferreira, Francisco J. A. Loureiro, Duncan P. Fagg, Daniel A. Macedo, Uílame U. Gomes, Márcio M. Soares, Rodinei M. Gomes i Marco A. Morales. "NiFe Alloy Nanoparticles Tuning the Structure, Magnetism, and Application for Oxygen Evolution Reaction Catalysis". Magnetochemistry 9, nr 8 (8.08.2023): 201. http://dx.doi.org/10.3390/magnetochemistry9080201.

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In this study, Ni-Fe alloy nanoparticles were prepared using the proteic sol–gel method, followed by a reduction in H2 at 500 and 700 °C, namely hereafter as NiFe-500 and NiFe-700, respectively. The morphological, structural, and magnetic properties were tuned via the thermal treatment in H2. The samples were studied using XPS, TEM, Mössbauer spectroscopy, DC magnetic measurements, and electrochemical measurements. Ritveld refinements showed that the sample NiFe-500 has FCC (face-centered cubic) and BCC (body-centered cubic) NiFe alloys, while the sample NiFe-700 has only FCC NiFe alloy. For both samples, magnetization measurements in the range of 300–900 K showed the presence of the Griffiths phase, indicating the formation of clusters of either Fe or Ni-Fe alloys rich in Fe. The sample NiFe-500 presented ferromagnetic (FM) transitions at 533, 700, and 834 K, assigned to the alloys Ni37Fe63-FCC, Ni46Fe54-FCC, and Ni55Fe45-FCC, respectively. In contrast, we could not observe the FM transition of the BCC Ni-Fe alloy because of limitations in our experimental setup (T ≤ 900 K). Meanwhile, three FM transitions were observed for the sample NiFe-700 at 480, 655, and 825 K, attributed to the alloys Ni34Fe66-FCC, Ni43Fe57-FCC, and Ni54Fe46-FCC, respectively. At 5 K, the samples NiFe-500 and NiFe-700 have saturation magnetizations of 164.2 and 173.6 emu g−1, respectively. For application in Oxygen Evolution Reaction catalysis, the samples NiFe-500 and NiFe-700 showed different overpotentials of 319 and 307 mV at 10 mA cm−2. These low overpotential values indicate a higher electrochemical activity of the FCC Ni-Fe alloy and, for both samples, a superior electrocatalytic activity in comparison to RuO2 e IrO2 conventional catalysts. Furthermore, the samples showed high electrochemical stability in chrono potentiometric studies for up to 15 h. This current work highlights that the Ni-Fe alloys produced via the proteic sol–gel and with a reduction in H2 methods can be promising for OER systems due to their good performance and low costs.

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Meng, Fanchao, Yuying Wu, Kaiqi Hu, Yang Li, Qianqian Sun i Xiangfa Liu. "Evolution and Strengthening Effects of the Heat-Resistant Phases in Al–Si Piston Alloys with Different Fe/Ni Ratios". Materials 12, nr 16 (7.08.2019): 2506. http://dx.doi.org/10.3390/ma12162506.

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The evolution of three major heat-resistant phases (δ-Al3CuNi, γ-Al7Cu4Ni, T-Al9FeNi) and its strengthening effects at high temperature in Al–Si piston alloys with various Fe/Ni ratios were studied using field emission scanning electron microscope (FE-SEM), electron probe microanalysis (EPMA), and X-ray diffraction (XRD). With the increase of Fe/Ni ratios, the heat-resistant phases begin to evolve in category, morphology, and distribution. The results show that a suitable Fe/Ni ratio will cause the T-Al9FeNi phase to appear and form a closed or semi-closed network with δ-Al3CuNi and γ-Al7Cu4Ni phases instead of the originally isolated heat-resistant phases. As a result, the ultimate tensile strength of the optimized alloy reached 106 MPa with a Fe/Ni ratio of 0.23, which was 23.3% higher than that of base alloy at 350 °C, which is attributed to the fact that a closed or semi-closed network microstructure is advantageous to the bearing of mechanical loads. This work may provide useful ideas for the development of high temperature resistant piston alloys.

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Younes, Abderrahmane, Amirouche Bouamer, Rachid Amraoui, Nadia Metidji, Mounia Guessoum i Abderahim Abada. "Magnetic and Structural Properties of Fe-Ni and Fe-Ni-Gr Based Nanostructured Alloys Synthesized by Mechanical Alloying". Journal of Nano Research 78 (17.04.2023): 1–16. http://dx.doi.org/10.4028/p-5h903c.

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Nanostructured FeNi and FeNiGr alloys were successfully synthesized by the mechanical alloying technique. The alloys formation and different magnetic properties were studied as a function of milling time in the range of 0 to 30h by X-ray diffraction (XRD) technique, Scanning Electron Microscope (SEM) analysis and a Vibrating Sample Magnetometer (VSM) process. The X-ray diffraction study confirmed the apparition of the α-FeNi alloy after 5h of milling with an average crystallite size of 26.80nm. The crystallite size obtained after 30h of milling is 10.13nm, While, the lattice deformation increases from 0.431 to 0.935%. in addition, the analysis of the magnetization curves of the Fe-Ni alloys revealed original magnetic properties: super paramagnetic behavior, and especially saturation magnetization and significant coercivity. Furthermore, the addition of graphene into FeNi alloy, reduced its crystallite size from 11.56 to 6.65 nm, and increases the lattice strain and lattice parameter from 0.631 to 0.748% and from 0.28686 to 0.28704nm, respectively. Which, enhanced these magnetic properties, by increasing its coercivity (Hc) from 16. 07 to 135.42 Oe and Mr from 1.73 to 5.87 emu/g, while the magnetization saturation is decreased from 153.25 to 123.06 emu/g.

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Sato, T., T. Simatsu, T. Miyahara i T. Miyazaki. "Magnetooptic Effect of Fe-Ni, Ni-Co and Fe-Co Binary Alloy Films". IEEE Translation Journal on Magnetics in Japan 6, nr 10 (październik 1991): 869–74. http://dx.doi.org/10.1109/tjmj.1991.4565269.

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Geng, Xiaohua, Eric Navarrete, Wentao Liang i Elizabeth J. Podlaha. "Electrodeposited Fe-Mo-Ni nanowires and Cu-Mo-Fe-Ni alloy nanowire segments". Materials Letters 211 (styczeń 2018): 9–12. http://dx.doi.org/10.1016/j.matlet.2017.09.058.

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Zhong, Guo-Qing, i Qin Zhong. "Preparation of Soft Magnetic Fe-Ni-Pb-B Alloy Nanoparticles by Room Temperature Solid-Solid Reaction". Scientific World Journal 2013 (2013): 1–6. http://dx.doi.org/10.1155/2013/946897.

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The Fe-Ni-Pb-B alloy nanoparticles was prepared by a solid-solid chemical reaction of ferric trichloride, nickel chloride, lead acetate, and potassium borohydride powders at room temperature. The research results of the ICP and thermal analysis indicate that the resultants are composed of iron, nickel, lead, boron, and PVP, and the component of the alloy is connected with the mole ratio of potassium borohydride and the metal salts. The TEM images show that the resultants are ultrafine and spherical particles, and the particle size is about a diameter of 25 nm. The largest saturation magnetization value of the 21.18 emu g−1is obtained in the Fe-Ni-Pb-B alloy. The mechanism of the preparation reaction for the Fe-Ni-Pb-B multicomponent alloys is discussed.

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Lin, Tao, Li Sheng Wang, Zhi Shan Gao i Zhi Meng Guo. "Ni-Based Alloy Coating on Plain-Carbon Steel by Hot Dipping Process". Advanced Materials Research 361-363 (październik 2011): 609–14. http://dx.doi.org/10.4028/www.scientific.net/amr.361-363.609.

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A layer of Ni-Cr-Si-B-Fe alloy was successfully coated on plain steel substrate by hot dipping process. The Ni-Cr-Si-B-Fe alloy coating has a homogeneous thickness of 3mm. The chemical composition and microstructure were studied with SEM and XRD in this paper. The result shows that the Ni-Cr-Si-B-Fe alloy coating is defect-free and chemical bonded with plain steel substrate. A light band zone of 8-10 m width is between Ni-Cr-Si-B-Fe alloy coating and plain steel substrate, and may be considered as a quickly solidified layer. The coating microstructure is a heterogeneous microstructure and changes from the light band zone to the surface of the coating, which is composed mainly of coarse columnar dendrite, needle-like precipitates and scattered eutectic structures. Four regions across the thickness of Ni brazing alloy coating, due to solidification conditions upon hot-dipping, have been identified with distinguished microstructure. In γ-(Fe, Ni) solid solution matrix, the hard phases of CrB, Fe2B and Cr23C6 is identified in the coating.

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Umemoto, M., M. Udaka, K. Kawasaki i X. D. Liu. "Formation of ultrafine powders of binary alloy systems by plasma jet". Journal of Materials Research 13, nr 6 (czerwiec 1998): 1511–16. http://dx.doi.org/10.1557/jmr.1998.0210.

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Recently, a new method, i.e., a plasma jet method, was developed in our lab for the production of ultrafine powders. In the present work, we investigated the formation of binary Al–Fe, Al–Si, Fe–Si, Al–Cu, Al–Ni, Ni–Ti, Fe–Cu, and Fe–Ti ultrafine powders using this method. Premixed pure elemental powders of various compositions of Al–Fe, Al–Si, Fe–Si, Al–Cu, Al–Ni, Ni–Ti, Fe–Cu, and Fe–Ti were used as starting materials. These premixed powders were injected into the plasma jet of Ar–N2 working gas to form ultrafine powders. The obtained ultrafine powders were characterized by x-ray diffraction and transmission electron microscope to check the microstructures of ultrafine particles.

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Mandal, Manoj, i Chandrabalan Sasikumar. "Electrodeposition of Nanostructured Ni Based Alloys/Composites – A Critical Analysis". Advanced Materials Research 984-985 (lipiec 2014): 514–19. http://dx.doi.org/10.4028/www.scientific.net/amr.984-985.514.

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The Ni based alloys and composites synthesized by electro-deposition techniques were investigated in this paper. The co-deposition techniques for development of Ni-Co alloys, synthesis of oxide doped nanocomposites were analyzed. The hardness, wear resistance and corrosion resistance of different coatings: Ni, Ni-Co alloys, Ni-Fe2O3,Ni-Al2O3,Ni-Fe-BN, Ni-TiN composites were studied in detail. The Ni-Fe-BN and Ni-TiN showed more than 550 percent increase in hardness of stainless steel substrate. The Hardness was found to be about 600-1180Hv for Nitride impregnated coatings. These films also showed higher corrosion resistance in comparison to other Ni based alloy and composite coatings. The microstructural investigation of these alloys showed nanostructured rods and fibres in the deposited films.

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