Structural, tribological and resistivity studies of Ga substituted (Al71-xGax) Pd21Mn8 icosahedral and other intermetallic phases
| العنوان: | Structural, tribological and resistivity studies of Ga substituted (Al71-xGax) Pd21Mn8 icosahedral and other intermetallic phases |
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| المؤلفون: | Nilay Krishna Mukhopadhyay, Murtaza Bohra, G.V.S. Sastry, Rajiv Kumar Mandal, M.-C. de Weerd, Ratnamala Chatterjee, Vincent Fournée |
| المساهمون: | Institut Jean Lamour (IJL), Institut de Chimie du CNRS (INC)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS), School of Materials Science and Technology, Institute of Technology, Banaras Hindu University, Banaras Hindu University [Varanasi] (BHU), Department of Physics [Delhi], Indian Institute of Technology Delhi (IIT Delhi) |
| المصدر: | Journal of Alloys and Compounds Journal of Alloys and Compounds, Elsevier, 2013, 551, pp.274-278. ⟨10.1016/j.jallcom.2012.09.130⟩ |
| بيانات النشر: | HAL CCSD, 2013. |
| سنة النشر: | 2013 |
| مصطلحات موضوعية: | 010302 applied physics, Valence (chemistry), Materials science, Icosahedral symmetry, Mechanical Engineering, Fermi level, Alloy, Metals and Alloys, Intermetallic, Quasicrystal, 02 engineering and technology, engineering.material, 021001 nanoscience & nanotechnology, 01 natural sciences, symbols.namesake, Crystallography, Lattice constant, Mechanics of Materials, Electrical resistivity and conductivity, 0103 physical sciences, Materials Chemistry, symbols, engineering, [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], 0210 nano-technology |
| الوصف: | We report the formation of icosahedral phase in Al 71− x Ga x Pd 21 Mn 8 ( x = 0, 4, 6, 8, and 10 at.%) by adopting powder metallurgical route. Such a variation in Ga substitution in the alloy composition gave rise to a nearly single phase face centred icosahedral phase for x = 6. All other Ga substituted compositions displayed formation of intermetallic phases in addition to the icosahedral quasicrystals. The 6d hypercubic lattice parameter for the Ga substituted icosahedral phase is higher than that of Al 71 Pd 21 Mn 8 composition. The change in the lattice parameter is non-monotonic. Such a change in lattice parameter has been explained based on the mixed valence states of Ga on Al site. The electrical resistivity of x = 6 sample is comparable to those of earlier studies pertaining to flux grown icosahedral composition of Al(Ga)PdMn alloy. Further, x = 6 sample has displayed highest value of static friction coefficient. This has been understood in terms of the shift of Fermi level from the pseudo-gap location owing to mixed valence states of Ga. |
| اللغة: | English |
| تدمد: | 0925-8388 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d542d3cc42b40c3e5b0e5c319423c6c3Test https://hal.archives-ouvertes.fr/hal-01287851Test |
| حقوق: | CLOSED |
| رقم الانضمام: | edsair.doi.dedup.....d542d3cc42b40c3e5b0e5c319423c6c3 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 09258388 |
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