Characterization of phases in complex metallic alloys Al73Mn27−Fe  (x= 2, 4 and 6)

Priputen, P.; Kusý, Martin; Kriška, Martin; Lipka, Roman; Illeková, E.; Švec, P.; Buršı́k, Jiřı́; Svoboda, Milan; Dolinšek, J.; Janovec, Jozef

doi:10.1016/j.intermet.2009.05.012

Cited by 14 publications

(7 citation statements)

References 20 publications

(22 reference statements)

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“…The reason is probably the fact that the similarity between the manganese and iron atoms is higher than the similarity between the manganese and palladium atoms; iron is just beside manganese in the periodic table. It was also reported that the Al 73 Mn 21 Fe 6 composition behaves special since additional annealing of the quenched T‐Al 73 Mn 21 Fe 6 Taylor phase resulted in a transformation to the decagonal phase 26…”

Section: Samples Selection and Structural Considerationsmentioning

confidence: 95%

Decagonal Quasicrystals and Approximants: Two‐Dimensional or Three‐Dimensional Solids?

Dolinšek

Smontara

2011

Israel Journal of Chemistry

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Crystallographic structures of decagonal quasicrystals (d‐QCs) are traditionally described as a periodic stacking of atomic planes with quasiperiodic in‐plane atomic order, so that d‐QCs are considered to be two‐dimensional (2D) quasicrystals, whereas they are periodic crystals in the third dimension. Similar stacked‐layer structures are observed also in the periodic decagonal approximant phases. In this review paper, we consider the dimensionality of the chemical bonding network in the d‐QCs and their approximants on the basis of electrical resistivity. By comparing the anisotropic resistivity along the stacking‐ and the in‐plane directions of a series of decagonal approximants with different numbers of atomic layers within one periodicity unit (the two‐layer Y‐Al‐Co‐Ni, the four‐layer o‐Al13Co4, Al13Fe4 and Al13(Fe,Ni)4, and the six‐layer Al4(Cr,Fe) and T‐Al3(Mn,Fe)) and of a two‐layer d‐Al‐Co‐Ni decagonal quasicrystal, we show that universally, the stacking direction perpendicular to the atomic planes is always the most conducting one. Since the in‐plane electrical resistivities are of the same order of magnitude as the resistivity along the stacking direction, this confirms the 3D character of the investigated solids. The stacked‐layer description in terms of 2D atomic planes should therefore be regarded as a convenient geometrical approach to describe the complex structures of the d‐QCs and their approximants, whereas their physical properties are those of true 3D solids.

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Section: Samples Selection and Structural Considerationsmentioning

confidence: 95%

Decagonal Quasicrystals and Approximants: Two‐Dimensional or Three‐Dimensional Solids?

Dolinšek

Smontara

2011

Israel Journal of Chemistry

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“…The experiments were done on altogether ten alloys coming under Al-Pd-Co, Al-Cu-Co, and Al-Mn-Fe systems, Table 3. Phases in both non-equilibrium (as-cast, after DTA testing) and near-equilibrium (as-annealed) alloys were analyzed using scanning electron microscopy (SEM), electron backscattered diffraction (EBSD), high-angle annular dark-field imaging (HAADF), transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), and differential thermal analysis (DTA) [13][14][15][16].…”

Section: Work Outlinementioning

confidence: 99%

“…The near-equilibrium single-phase T-formed microstructure (T is also denoted as HT-Al 11 Mn 4 ) was attributed to the Al 73 Mn 25 Fe 2 and Al 73 Mn 23 Fe 4 alloys after annealing at 950°C for 700 h [13]. Although T is the binary phase (Table 1), it can be alloyed with the third element (Table 3) in some ternary alloys (e.g.…”

Section: Al-mn-fe Systemmentioning

confidence: 99%

Complex Metallic Alloys – Microstructure Characterization

Janovec

Černičková

Priputen

2013

KEM

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The recent findings related to binary and ternary structurally complex phases in selected complex metallic alloys coming under Al-Pd-Co, Al-Cu-Co, and Al-Mn-Fe systems are presented. The phases were characterized by scanning electron microscopy, transmission electron microscopy, energy-dispersive X-ray spectroscopy, high-angle annular dark-field imaging, X-ray diffraction, and differential thermal analysis. There are highlighted some unusual features of phases D, U, T, and ε-family from both structural and compositional points of view.

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“…The structure corresponds to a four-layer stacking along [100] [6,8], with flat layers at x ¼ 0 and x ¼ 1/2 and two symmetrically equivalent puckered layers at x ¼ 1/4 and 3/4, giving a period of % 0.8 nm along [100]. The orthorhombic Taylor phase T-Al-Mn-Fe of composition Al 72.5 Mn 21.5 Fe 6.0 [9] is an approximant to the d-Al-Mn-Pd quasicrystal. The structure of the Taylor phase T-Al-Mn-Fe is built of two types of atomic layers within the (a, c) planes stacked along the b pseudo-ten-fold crystallographic axis, a flat layer, F, and a puckered layer composed of two sublayers, P1 and P2.…”

Section: Structural Consideration Sample Selection and Experimentalmentioning

confidence: 99%

Anisotropic transport properties of the Al₁₃TM₄ and T-Al–Mn–Fe complex metallic alloys

Smontara

Popčević

Stanić

et al. 2010

Philosophical Magazine

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Anisotropy of the transport properties (electrical resistivity, (T ), thermoelectric power, S(T ), and thermal conductivity, (T )) of the Al 76 Co 22 Ni 2 (Y-Al-Ni-Co), o-Al 13 Co 4 and T-Al 72.5 Mn 21.5 Fe 6.0 complex metallic alloys was investigated experimentally. These compounds belong to the class of approximants in decagonal quasicrystals phases with stacked-layer crystallographic structure and enabled us to study the evolution of transport properties with increasing structural complexity and the unit cell size. For Y-Al-Ni-Co and o-Al 13 Co 4 , the anisotropic electronic transport coefficients were analyzed theoretically by Boltzmann transport theory and ab initio calculated anisotropic Fermi surface. The non-metallic anisotropic electrical resistivity of the T-Al 72.5 Mn 21.5 Fe 6.0 may be analyzed in a semi-quantitative way by the theory of quantum transport of slow charge carriers.

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Characterization of phases in complex metallic alloys Al73Mn27−Fe (x= 2, 4 and 6)

Cited by 14 publications

References 20 publications

Decagonal Quasicrystals and Approximants: Two‐Dimensional or Three‐Dimensional Solids?

Decagonal Quasicrystals and Approximants: Two‐Dimensional or Three‐Dimensional Solids?

Complex Metallic Alloys – Microstructure Characterization

Anisotropic transport properties of the Al₁₃TM₄ and T-Al–Mn–Fe complex metallic alloys

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Characterization of phases in complex metallic alloys Al73Mn27−Fe (x= 2, 4 and 6)

Cited by 14 publications

References 20 publications

Decagonal Quasicrystals and Approximants: Two‐Dimensional or Three‐Dimensional Solids?

Decagonal Quasicrystals and Approximants: Two‐Dimensional or Three‐Dimensional Solids?

Complex Metallic Alloys – Microstructure Characterization

Anisotropic transport properties of the Al13TM4 and T-Al–Mn–Fe complex metallic alloys

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Anisotropic transport properties of the Al₁₃TM₄ and T-Al–Mn–Fe complex metallic alloys