Phase relationships of the R–Al–Si systems

Cardinale, Anna Maria; Macciò, D.; Saccone, A.

doi:10.1007/s10973-015-4906-4

Cited by 7 publications

(3 citation statements)

References 16 publications

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“…RSi 2−x Al x solid solutions crystallize in body centered tetragonal α-ThSi 2 type structure with a space group of I4 1 /amd, where Al and Si occupy randomly the 8e crystal position. [29,32,33] However, the recent study shows that the equliatomic PrAlSi not only fits the site-disordered α-ThSi 2 type structure but also the noncentrosymmetrically ordered I4 1 md as well. The minor difference between the two models is the temperature factor.…”

Section: Introductionmentioning

confidence: 95%

Structure and magnetic properties of RAlSi (R = light rare earth)*

Wang¹,

Guo²

2021

Chinese Phys. B

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We prepared the semimetals RAlSi (R = light rare earth), and systematically study their crystal structures and magnetic properties. X-ray diffractions confirm the coexistence of the site-disordered phase with group space of I41/amd and the noncentrosymmetrically ordered phase with space group of I41 md in RAlSi alloy. The ordered phase is the main phase in RAlSi alloy. RAlSi alloys show nonmagnetic character for R = La, low temperature ferromagnetic order for R = Ce, Pr, and paramagnetic character for R = Nd, respectively. SmAlSi shows metamagnetic transition at 10 K and ferromagnetic order at 143 K, respectively. SmAlSi follows the van Vleck paramagnetic model in its paramagnetic region. The magnetization curves of RAlSi (R = Ce, Pr, Sm) follow the mixed model of ferromagnetism and paramagnetism, and the fitted saturation moment M S depends on the moment of trivalent rare earth. The paramagnetic susceptibility χ of RAlSi is going up with increasing the atomic order numbers of rare earth elements. This reveals that the magnetic property of RAlSi originates from the rare earth.

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Section: Introductionmentioning

confidence: 95%

Structure and magnetic properties of RAlSi (R = light rare earth)*

Wang¹,

Guo²

2021

Chinese Phys. B

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“…To our best effort literature data on R-Al-Si systems isothermal sections (in the whole range of concentrations) and liquid us projections mainly deal with the following: La-Al-Si (0 -33 at % La) [10], Ce-Al-Si [11], Pr-Al-Si [12] [13], Nd-Al-Si [13], Sm-Al-Si ( [13] and refs therein [14]), Eu-Al-Si [15], Gd-Al-Si, Al-Si-Tb and Al-Si-Dy ( [13] and refs therein), Ho-Al-Si (0 -33 at % Ho) [16], Er-Al-Si [17] and Y-Al-Si (0 -33 at % Y) [18]. In the Ho-Al-Si ternary system, in literature [19]…”

Section: R-al-si Ternary Systemsmentioning

confidence: 99%

Experimental Study of the Phase Equilibria in the R-Al-Si Ternary Systems (R: Rare Earth Element) the Ho-Al-Si Isothermal Section at 500?C

Cardinale¹,

Parodi²

2019

MSCE

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The effect of holmium addition to the Al-Si system has been experimentally studied, as the isothermal section at 500˚C. The constitution of the alloys has been determined by means of scanning electron microscopy (SEM), electron microprobe analysis (EDXS) and X-ray powder diffraction. The knowledge of the phase relationships in the R-Al-Si ternary systems (R: rare earths element) is essential to deeply understand the technological properties of the Al-Si based alloys, that are useful in different industrial fields. In the system investigated have been identify nineteen ternary fields and twelve two phase fields. Three ternary compounds have been found in this ternary section:

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“…As the knowledge of the liquid-solid phase equilibria in the ternary R-Al-Si systems, only the Al-rich corner of the R Al-Si systems for the three light lanthanides Pr, Nd, Sm, and Tb have been investigated [21,22]. The 500 • C isothermal section of the ternary systems Pr-Al-Si, Nd-Al-Si, Sm-Al-Si, Gd-Al-Si, Tb-Al-Si, and Dy-Al-Si have been studied by our research group [23,24] (and refs therein), while the Er-Al-Si isothermal section at 600 • C has been investigated by [25].…”

Section: Introductionmentioning

confidence: 99%

Dy–Al–Si System: Experimental Study of the Liquid–Solid Phase Equilibria in the Al-Rich Corner

Cardinale

Parodi

2023

Crystals

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The Dy–Al–Si ternary system has been experimentally studied, as the effect of the dysprosium addition on the constitution and topology of the liquidus surface, focusing on the (Al) rich part. The system has been investigated in a composition range of up to about 58 at% silicon. The alloys constitution and the liquidus surface projection have been determined by means of scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDXS), X-ray powder diffraction (XRPD), and differential thermal analysis (DTA). This work is part of a research framework on the properties and solid–liquid phase equilibria of the R Al–Si (R: rare earth) systems. These data, along with the ternary systems isothermal section, are needed to outline the design, plan, and development of new Al–Si-based alloys. In the Dy–Al–Si system, four primary crystallization fields have been experimentally detected: (Si), DyAlxSi(2−x) (orthorhombic form), Dy2Al3Si2 (Τ2), and DyAl(3−x)Six. The following three invariant equilibria have been identified: at 566 °C the ternary eutectic L ⇆ DyAl2Si2 + (Al) + (Si), at 630 °C the U1 L+ DyAl3 ⇆ Dy2Al3Si2 + (Al), and at 562 °C the U2: L+ Dy2Al3Si2 ⇆ DyAl2Si2 +(Al) reactions. A comparison with other known R Al–Si systems has been conducted.

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Phase relationships of the R–Al–Si systems

Cited by 7 publications

References 16 publications

Structure and magnetic properties of RAlSi (R = light rare earth)*

Structure and magnetic properties of RAlSi (R = light rare earth)*

Experimental Study of the Phase Equilibria in the R-Al-Si Ternary Systems (R: Rare Earth Element) the Ho-Al-Si Isothermal Section at 500?C

Dy–Al–Si System: Experimental Study of the Liquid–Solid Phase Equilibria in the Al-Rich Corner

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