Anisotropic transport properties of the Al<sub>13</sub>TM<sub>4</sub> and T-Al–Mn–Fe complex metallic alloys

Smontara, Ana; Popčević, Petar; Stanić, Denis; Velebit, Kristijan; Dolinšek, J.

doi:10.1080/14786435.2010.511595

Cited by 3 publications

(2 citation statements)

References 15 publications

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“…These approximants to decagonal quasicrystalline phases present specific crystal structures, described as a stacking of atomic planes perpendicular to the pseudo 10-fold direction, each plane presenting pentagonal atomic arrangements [27]. This leads to an anisotropy in the magnetic properties, as well as in charge and heat transport properties [28][29][30].…”

Section: Introductionmentioning

confidence: 99%

Catalytic properties of Al₁₃TM₄complex intermetallics: influence of the transition metal and the surface orientation on butadiene hydrogenation

Piccolo

Chatelier

Weerd

et al. 2019

Science and Technology of Advanced Materials

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Complex intermetallic compounds such as transition metal (TM) aluminides are promising alternatives to expensive Pd-based catalysts, in particular for the semi-hydrogenation of alkynes or alkadienes. Here, we compare the gas-phase butadiene hydrogenation performances of o-Al 13 Co 4 (100), m-Al 13 Fe 4 (010) and m-Al 13 Ru 4 (010) surfaces, whose bulk terminated structural models exhibit similar cluster-like arrangements. Moreover, the effect of the surface orientation is assessed through a comparison between o-Al 13 Co 4 (100) and o-Al 13 Co 4 (010). As a result, the following room-temperature activity order is determined: Al 13 Co 4 (100) < Al 13 Co 4 (010) < Al 13 Ru 4 (010) < Al 13 Fe 4 (010). Moreover, Al 13 Co 4 (010) is found to be the most active surface at 110°C, and even more selective to butene (100%) than previously investigated Al 13 Fe 4 (010). DFT calculations show that the activity and selectivity results can be rationalized through the determination of butadiene and butene adsorption energies; in contrast, hydrogen adsorption energies do not scale with the catalytic activities. Moreover, the calculation of projected densities of states provides an insight into the Al 13 TM 4 surface electronic structure. Isolating the TM active centers within the Al matrix induces a narrowing of the TM d-band, which leads to the high catalytic performances of Al 13 TM 4 compounds.

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Section: Introductionmentioning

confidence: 99%

Catalytic properties of Al₁₃TM₄complex intermetallics: influence of the transition metal and the surface orientation on butadiene hydrogenation

Piccolo

Chatelier

Weerd

et al. 2019

Science and Technology of Advanced Materials

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“…For example, in many samples these days, physical properties can readily be measured as a function of direction in real space. This was very nicely demonstrated in Ana Smontara's studies of transport properties in anisotropic complex metallic alloys [11]. Of course, better samples lead to improved understanding of the nature of quasicrystals, and the ability to make quantitative and precise experimental discoveries.…”

Section: New Materials Better Samples Improved Experimental Resultsmentioning

confidence: 87%

Quasicrystals: diversity and complexity

Dubois

Lifshitz

2011

Philosophical Magazine

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a variety of stimulating new experimental data and novel theoretical results. New aperiodic crystals were presented; new theoretical ideas were described; exciting experimental results were revealed; and potential applications of quasicrystals were reviewed, showing an unprecedented level of development. ICQ11 was a great success thanks to the high standard of its scientific content and to the efficiency of its organization. ICQ11 proved that quasicrystal research is sure to continue offering diverse challenges and profound insights into the complexity of matter.Keywords: quasicrystals; aperiodic crystals; complex metallic alloys (CMA); electronic and magnetic properties; soft matter; surface science; metamaterials; applications The 11th international conference on quasicrystalsThe International Conference on Quasicrystals was convened in Sapporo, on June 13-18, 2010, for the second time in Japan, and the 11th since its inception in Les Houches, in 1985. The program was exceptional in its diversity, with 145 contributions, covering topics like formation, growth and stability; structure and modeling; mathematics; physical properties; surfaces and overlayers; applications; and metamaterials. Such a variety of subjects can be taken as a promising fingerprint for the future of the field. These notes do not provide an accurate summary of the conference, nor do they reflect an exact assessment of the current status of quasicrystal research. They are merely a selection of highlights from the conference -reflecting our own personal tastes and biases -whose purpose is to demonstrate that quasicrystals are still very interesting and challenging almost three decades after their discovery [1]. New materials, better samples, improved experimental resultsIt is quite common in conferences on quasicrystals to learn of newly discovered quasicrystal-forming alloy systems. ICQ11 was no exception. Only a mere decade has

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Thermal transport properties of decagonal quasicrystals and their approximants

et al. 2013

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Transport properties (thermal conductivity, electrical resistivity and thermopower) of decagonal quasicrystal d-AlCoNi, and approximant phases Y-AlCoNi, o-Al 13 Co 4 , m-Al 13 Fe 4 , mAl 13 (Fe,Ni) 4 and T-AlMnFe have been reviewed. Among all presented alloys the stacking direction (periodic for decagonal quasicrystals) is the most conductive one for the charge and heat transport, and the in/out-of-plane anisotropy is much larger than the in-plane anisotropy. There is a strong relationship between periodicity length along stacking direction and anisotropy of transport properties in both quasicrystals and their approximants suggesting a decrease of the anisotropy with increasing number of stacking layers.

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

Cited by 3 publications

References 15 publications

Catalytic properties of Al₁₃TM₄complex intermetallics: influence of the transition metal and the surface orientation on butadiene hydrogenation

Catalytic properties of Al₁₃TM₄complex intermetallics: influence of the transition metal and the surface orientation on butadiene hydrogenation

Quasicrystals: diversity and complexity

Thermal transport properties of decagonal quasicrystals and their approximants

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

Cited by 3 publications

References 15 publications

Catalytic properties of Al13TM4complex intermetallics: influence of the transition metal and the surface orientation on butadiene hydrogenation

Catalytic properties of Al13TM4complex intermetallics: influence of the transition metal and the surface orientation on butadiene hydrogenation

Quasicrystals: diversity and complexity

Thermal transport properties of decagonal quasicrystals and their approximants

Contact Info

Product

Resources

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

Catalytic properties of Al₁₃TM₄complex intermetallics: influence of the transition metal and the surface orientation on butadiene hydrogenation

Catalytic properties of Al₁₃TM₄complex intermetallics: influence of the transition metal and the surface orientation on butadiene hydrogenation