Thermodynamic properties of alloys of the Ni-Sc and Ni-Y systems

Shevchenko, Maksym; Иванов, М. И.; Березуцкий, В. В.; Кудин, В. Г.; Судавцова, В. С.

doi:10.1134/s0036024414060284

Cited by 16 publications

(6 citation statements)

References 9 publications

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“… 12 It is well known that nickel-based superalloy is a commonly used superalloy, which is widely used in manufacturing aerospace engines, industrial gas turbine blades and other hot end components. M. A. Shevchenko et al 13 have researched thermodynamic properties of binary alloys including Ni–Sc and Ni–Y systems, they predicted the similar parameters of multicomponent systems and studied the amorphous tendency of alloys. S. Kardellass et al 14 had been assessed the thermodynamically in Ni–Sc system using the CALPHAD approach.…”

Section: Introductionmentioning

confidence: 99%

A first-principles calculation of structural, mechanical, thermodynamic and electronic properties of binary Ni–Y compounds

Zhou

Yan

et al. 2018

RSC Adv.

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Section: Introductionmentioning

confidence: 99%

A first-principles calculation of structural, mechanical, thermodynamic and electronic properties of binary Ni–Y compounds

Zhou

Yan

et al. 2018

RSC Adv.

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“…Lastly, following scandium addition the original columnar cellular microstructure of the AlCoCrCu 0.5 FeNi HEA turns into equiaxed non-dendritic-like grains ( Figure 2 c). The chemical inhomogeneity due to scandium segregation appears surprising, considering the strongly negative mixing enthalpy of the metal with iron, nickel, cobalt and aluminum [ 38 , 39 , 40 ]. The driving force of the segregation is thus the formation of the secondary phase.…”

Section: Resultsmentioning

confidence: 99%

The Effect of Scandium Ternary Intergrain Precipitates in Al-Containing High-Entropy Alloys

Riva

Mehraban

Lavery

et al. 2018

Entropy

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Abstract:We investigate the effect of alloying with scandium on microstructure, high-temperature phase stability, electron transport, and mechanical properties of the Al 2 CoCrFeNi, Al 0.5 CoCrCuFeNi, and AlCoCrCu 0.5 FeNi high-entropy alloys. Out of the three model alloys, Al 2 CoCrFeNi adopts a disordered CsCl structure type. Both of the six-component alloys contain a mixture of body-centered cubic (bcc) and face centered cubic (fcc) phases. The comparison between in situ high-temperature powder diffraction data and ex situ data from heat-treated samples highlights the presence of a reversible bcc to fcc transition. The precipitation of a MgZn 2 -type intermetallic phase along grain boundaries following scandium addition affects all systems differently, but especially enhances the properties of Al 2 CoCrFeNi. It causes grain refinement; hardness and electrical conductivity increases (up to 20% and 14% respectively) and affects the CsCl-type → fcc equilibrium by moving the transformation to sensibly higher temperatures. The maximum dimensionless thermoelectric figure of merit (ZT) of 0.014 is reached for Al 2 CoCrFeNi alloyed with 0.3 wt.% Sc at 650 • C.

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“…The same method has been used before to treat the results of calorimetrical investigation of liquid alloys simultaneously with the literature data from phase equilibria and thermodynamic properties of many metallic systems with strong interaction between the components [17][18][19]. The correctness of this method has been shown in the work [20].…”

Section: Experimental Partmentioning

confidence: 92%

Thermodynamic properties of alloys of the binary In–Yb system

Shevchenko¹,

Иванов²,

Berezutski³

et al. 2016

Russ. J. Phys. Chem.

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The thermochemical properties of melts of the binary In-Yb system were studied by the calorimetry method at 1160-1380 K over the whole concentration interval. It was shown that significant negative heat effects of mixing are characteristic features for these melts. Using the ideal associated solution (IAS) model, the activities of components, Gibbs energies and the entropies of mixing in the alloys, and the phase diagram of this system were calculated. They agree with the data from literature.Alloys of the rare-earth metals with p-elements of the third group are promising as superconductors, catalysts and promoters, as well as cathode materials with various emission properties [1,2]. However, there are only few works in the literature devoted to investigation of thermodynamic properties of indium-lanthanide alloys. Even those which were conducted, are related mostly to the alloys containing 75% indium or more. This is caused by poor accessibility of the components in pure state, and by instability of their alloys in air.Nevertheless, in the rest, these alloys are quite easy objects to investigate, since they are mostly low-melting, non-volatile, and not interacting with refractory crucible materials. This allows us to conduct investigation of thermodynamic properties of the In-Ln melts using calorimetry method over wide concentration ranges. Our research group has already done it successfully for the Eu-In [3] and the Ce-In systems. The present work is devoted to the In-Yb liquid alloys. Studying wide range of such systems, including the Gd-In and the In-La, will give an opportunity to determine the regularities of interaction between the components of the In-Ln systems.The phase diagram of the In-Yb system was investigated by McMasters et al. [4] using differential thermal analysis, metallography and X-ray diffraction methods. Fields of solid solutions, containing up to 1 at % In, were found for two ytterbium modifications (β-and γ-Yb). Five intermetallics were identified: YbIn 3 , YbIn 2 , YbIn, Yb 2 In, and Yb 5 In 2 . Two of them melt congruently (YbIn 2 , YbIn), and two else decompose by peritectic reactions (YbIn 3 , Yb 2 In). For the last intermetallic, the authors [4] proposed stoichiometry Yb 5 In 2 and peritectic melting. However, later in the work [5] the crystal structure and composition of this compound were updated-Yb 8 In 3 . A review [6] gave the phase diagram of the In-Yb system which includes this modification. Shifting of the composition from 71.4 to 72.7 at % Yb makes peritectic melting type of the Yb 8 In 3 compound questionable-instead, congruent melting becomes possible. Unfortunately, in both the handbook [7] and the CALPHAD thermodynamic assessment [8] this updating of stoichiometry was missed, and an old variant was used-Yb 5 In 2 .

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Thermodynamic properties of alloys of the Ni-Sc and Ni-Y systems

Cited by 16 publications

References 9 publications

A first-principles calculation of structural, mechanical, thermodynamic and electronic properties of binary Ni–Y compounds

A first-principles calculation of structural, mechanical, thermodynamic and electronic properties of binary Ni–Y compounds

The Effect of Scandium Ternary Intergrain Precipitates in Al-Containing High-Entropy Alloys

Thermodynamic properties of alloys of the binary In–Yb system

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