Resistivity of liquid iron-aluminum alloys

Levin, E. S.; Gel'd, P. B.; Ayushina, G. D.

doi:10.1007/bf00892108

Cited by 3 publications

(4 citation statements)

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“…The normal spectral emissivity is expressed using the refractive index n and extinction coefficient k as: Here, N is the number of free electrons per unit volume, m is the electron mass, e is the elementary charge, ε 0 is the permittivity of vacuum, and ρ el is the electrical resistivity. Five groups reported the electrical resistivity of liquid Ni-Al [21][22][23][24][25] alloys, as shown in Fig. 8, and the reported data were in general agreement with each other.…”

Section: Discussionsupporting

confidence: 69%

Composition Dependence of Normal Spectral Emissivity of Liquid Ni–Al Alloys

et al. 2021

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Ni-Al alloys are good candidates for the fabrication high-efficiency gas turbine blades. The Ni-Al system is also important as a solution for AlN crystal growth. To accurately model the casting process for turbine blade fabrication and design solution growth techniques for AlN, the thermophysical properties of the liquid alloy are required. In this study, the normal spectral emissivity of Ni-Al liquid alloys was measured using the electromagnetic levitation technique under a static magnetic field. Both the melting temperature of Cu and the eutectic temperature of the Ni-C system were used as fixed temperature points for spectrometer calibration to obtain the radiance of liquid Ni-Al alloys. The composition dependence of the normal spectral emissivity of liquid Ni-Al alloys had a maximum at ~40-50 mol%Al-Ni. The Ni-Al binary system had a stable intermetallic compound of NiAl with a melting temperature of 1 911 K. The short range chemical ordering could be attributed to strong bonding between Ni and Al atoms, which affected the scattering cross section of the conduction electrons even in the liquid state; hence, the normal spectral emissivity had a maximum at ~40-50 mol%Al-Ni.

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Section: Discussionsupporting

confidence: 69%

Composition Dependence of Normal Spectral Emissivity of Liquid Ni–Al Alloys

et al. 2021

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“…A decrease in the density of alumina slag is possible with an increase in the temperature of the entire melt. Hence, an increase of 200 K reduces the density of the slag by 0.05-0.07 g/cm 3 [18,19]. At the temperature of the boric anhydride reduction process, the slag density is 2.6-2.7 g/cm 3 [20].…”

Section: Resultsmentioning

confidence: 99%

“…The use of KBF 4 makes it possible to obtain aluminum boride with a higher boron content in the alloy due to the production of an additional amount of boron by reacting KBF 4 with aluminum at the temperature of the SHS process. The process of the interaction of KBF 4 with liquid aluminum is described in [18] by the following reactions [5]:…”

Section: Resultsmentioning

confidence: 99%

Optimization of Aluminum Boride Synthesis in the Self-Propagating High-Temperature Synthesis Mode to Create Waste-Free Technology

et al. 2022

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This paper is the continuation of our previous paper. In this work, we optimized the synthesis of aluminum borides by the SHS method. The purpose of the research was to develop the foundations of waste-free technology. The initial components were powders of boric anhydride (B2O3), aluminum (Al), the oxide-heating additive (KNO3), various fluxing additives, including mixed ones. The optimal ratios of the initial components for increasing the yield of aluminum boride with a high boron content and obtaining slag suitable for the production of high-alumina clinkers were determined. Studies have shown that the development of a waste-free technology for producing aluminum borides by the method of self-propagating high-temperature synthesis (SHS) is possible and yields target (alloy) and by-product (slag) products that meet the requirements for chemical and phase composition.

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“…The evaluation of the surface properties of molten alloys is directly related to the choice of the surface tension reference data of pure components, and thus the knowledge of the experimental conditions, the accuracy and the repeatability of data are of great importance, particularly in the cases when these data have to be combined with data taken from different sources. In this work the surface tension experimental data of pure liquid Al (equation ( 11)) and Cr (equation ( 12)) were taken from [36], while those of liquid Ni (equation ( 13)) were from [37]:…”

Section: Surface Properties: Surface Segregation and Surface Tensionmentioning

confidence: 99%

Bulk and surface properties of liquid Al–Cr and Cr–Ni alloys

Novaković

2011

J. Phys.: Condens. Matter

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The energetics of mixing and structural arrangement in liquid Al-Cr and Cr-Ni alloys has been analysed through the study of surface properties (surface tension and surface segregation), dynamic properties (chemical diffusion) and microscopic functions (concentration fluctuations in the long-wavelength limit and chemical short-range order parameter) in the framework of statistical mechanical theory in conjunction with quasi-lattice theory. The Al-Cr phase diagram exhibits the existence of different intermetallic compounds in the solid state, while that of Cr-Ni is a simple eutectic-type phase diagram at high temperatures and includes the low-temperature peritectoid reaction in the range near a CrNi(2) composition. Accordingly, the mixing behaviour in Al-Cr and Cr-Ni alloy melts was studied using the complex formation model in the weak interaction approximation and by postulating Al(8)Cr(5) and CrNi(2) chemical complexes, respectively, as energetically favoured.

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Resistivity of liquid iron-aluminum alloys

Cited by 3 publications

References 0 publications

Composition Dependence of Normal Spectral Emissivity of Liquid Ni–Al Alloys

Composition Dependence of Normal Spectral Emissivity of Liquid Ni–Al Alloys

Optimization of Aluminum Boride Synthesis in the Self-Propagating High-Temperature Synthesis Mode to Create Waste-Free Technology

Bulk and surface properties of liquid Al–Cr and Cr–Ni alloys

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