Stable decagonal quasicrystals in the Al-Fe-Cr and Al-Fe-Mn alloy systems

Pavlyuchkov, D.; Balanetskyy, S.; Kowalski, W.; Surowiec, M.; Grushko, B.

doi:10.1016/j.jallcom.2008.11.005

Cited by 50 publications

(18 citation statements)

References 8 publications

(15 reference statements)

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“…Particular attention is paid to clarifying the effect of Fe on the potential formation of an icosahedral phase in the selected 94Al-6Mn alloy. The formation of a stable decagonal quasicrystalline phase has been reported recently in two ternary systems, namely Al-Fe-Mn and Al-Fe-Cr [41,42], suggesting that Fe stabilises the phase even under equilibrium solidification conditions. Finally, the hardness of the obtained materials was measured to verify the changes in mechanical properties resulting from the evolution of the microstructure under varying solidification conditions.…”

Section: Introductionmentioning

confidence: 76%

Formation of a quasicrystalline phase in Al–Mn base alloys cast at intermediate cooling rates

et al. 2017

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Al-rich 94Al-6Mn and 94Al-4Mn-2Fe alloys were suction-cast to evaluate the feasibility of obtaining bulk quasicrystal-strengthened Al-alloys at intermediate cooling rates alloyed with non-toxic, easily accessible and affordable additions. The influence of different cooling rates on the potential formation of a quasicrystalline phase was examined by means of scanning and transmission electron microscopy, X-ray diffraction and differential scanning calorimetry. Increased cooling rates in the thinnest castings entailed a change in sample phase composition. The highest cooling rates turned out to be insufficient to form an icosahedral quasicrystalline phase (I-phase) in the binary alloy. Instead, an orthorhombic approximant phase occurred (L-phase). The addition of Fe to the 94Al-6Mn binary alloy enhanced the formation of a quasicrystalline phase. At intermediate cooling rates of 10 2 -10 3 K/s, various metastable phases were formed, including decagonal and icosahedral quasicrystals and their approximants. Rods (1 mm in diameter) composed of I-phase particles embedded in Al matrix exhibited a hardness of 1.5 GPa, much higher than the 1.1 GPa of 94Al-6Mn.

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Section: Introductionmentioning

confidence: 76%

Formation of a quasicrystalline phase in Al–Mn base alloys cast at intermediate cooling rates

et al. 2017

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“…It has an orthorhombic structure with the lattice parameters a = 1.48 nm, b = 1.24 nm and c = 1.25 nm and the space group Pnma [10,11]. The ternary phases T-Al-Mn-Pd and T-Al-MnFe are isomorphic to T-Al 3 Mn [7,12]. In the respective ternary phase diagrams, the phases are stable up to $7% Pd and 14% Fe, respectively [12][13][14].…”

Section: The T-phase Structurementioning

confidence: 99%

“…The ternary phases T-Al-Mn-Pd and T-Al-MnFe are isomorphic to T-Al 3 Mn [7,12]. In the respective ternary phase diagrams, the phases are stable up to $7% Pd and 14% Fe, respectively [12][13][14]. A structure model for the ternary T-Al-Mn-Pd phase was developed by Klein [7] based on the T-Al 3 Mn model [11].…”

Section: The T-phase Structurementioning

confidence: 99%

Metadislocations in the complex metallic alloys T–Al–Mn– (Pd, Fe)

2011

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“…Like d-metals of groups V-VI (Nb, Ta, Cr, W), platinoids are regarded as effective doping additions in titanium aluminide alloys since they can improve both mechanical properties and corrosion behavior. The Department examined the phase equilibria and the figure is taken from [10] supplemented with data (italics) reported in [11][12][13][14] constructed the phase diagrams of the Al-Ti-Rh (Pd, Pt) systems over the entire composition range (with Rh) or at platinoid content lower than 50 at.% (with Pd and Pt). The phase diagrams are very complex and characterized by the formation of numerous ternary compounds (for example, they reach ten in the Al-Ti-Pt system, many of them have been first found [10] [10].…”

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confidence: 99%

“…The phase diagrams are very complex and characterized by the formation of numerous ternary compounds (for example, they reach ten in the Al-Ti-Pt system, many of them have been first found [10] [10]. Stable decagonal quasicrystals have been recently revealed in the ternary Al-Cr(Mn)-Fe [11,12] and Al-Ir-Os [13] systems. These findings contradict earlier conclusions on the decisive role of elements at the end of long periods (Cu, Ni, Pd) in the formation of stable quasiperiodic structures and open up new prospects in the search for aluminum-containing quasicrystals in systems formed by quite common and cheap (compared to platinoids) 3d-metals (starting from vanadium) that may be of interest for practice.…”

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confidence: 99%

The physical chemistry of inorganic materials developed in the studies of V. N. Eremenko’s school: physicochemical analysis and thermodynamics of alloys

Velikanova

2011

Powder Metall Met Ceram

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Eremenko's papers on the physical chemistry of fine particulate systems and surface phenomena, chemical thermodynamics of alloys and metal compounds, and physicochemical analysis of metal and metallic systems have highly been praised by national and international scientific community. Eremenko's chemical concept of phenomena that occur at interfaces in heterogeneous systems has been brilliantly proven by experiment and widely used in studies focusing on surface phenomena, powder metallurgy processes, compatibility of materials, soldering, etc. The physicochemical constants for simple and complex substances derived from analysis of the phase diagrams and thermodynamic properties of metal, metallic, and semiconductor systems have been included into handbooks and are an important, fundamental component of modern materials science. Eremenko's scientific ideas and scientific areas are further elaborated by his school of physical chemists. Keywords: physical chemistry of inorganic materials, scientific school of physical chemists, phase diagram, thermodynamics of metal systems.12 August 2011 marked the 100 th anniversary of Valentin Eremenko's birth. He was an outstanding scholar, whose studies in physicochemical materials science were well known and universally recognized in the former Soviet Union and abroad. Valentin Eremenko was behind the establishment of the Institute for Problems of Materials Science, National Academy of Sciences of Ukraine, and led one of the three major academic areas at that time.The basic areas of physical chemistry that evolved under Eremenko's supervision were a response to challenges associated with the development of powder metallurgy, a new, very promising field of science and technology of that time. Valentin Eremenko formulated them as follows: "The key scientific problem of powder metallurgy is to establish conditions for the formation of a sintered body. The properties of starting components that are then combined in highly heterogeneous systems, the nature of and interaction between the components, and the surface energy, adsorption, and wetting at interfaces are major factors that determine the production environment and properties of sintered bodies (and, consequently, the properties of articles made of them)." This statement reflects the general challenges to be met in developing any new materials: select starting

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Stable decagonal quasicrystals in the Al-Fe-Cr and Al-Fe-Mn alloy systems

Cited by 50 publications

References 8 publications

Formation of a quasicrystalline phase in Al–Mn base alloys cast at intermediate cooling rates

Formation of a quasicrystalline phase in Al–Mn base alloys cast at intermediate cooling rates

Metadislocations in the complex metallic alloys T–Al–Mn– (Pd, Fe)

The physical chemistry of inorganic materials developed in the studies of V. N. Eremenko’s school: physicochemical analysis and thermodynamics of alloys

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