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2005 | 3 | 3 | 395-408
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Study of solid-solution hardening in binary aluminium-based alloys

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Solid-solution formation in binary aluminium-based alloys is due essentially to the combined effects of the size and valence of solvent and solute atoms, as expected by the four Hume-Rothery rules. The lattice parameter of aluminium in the solid solution of the sputtered Al−Fe films is [Al-a (Å)=4.052−6.6×10−3Y]. The increasing and decreasing evolution of the lattice parameter of copper [Cu-a (Å)=3.612+1.8×10−3Z] and aluminium [Al-a (Å)=4.048−1.6×10−3X] in the sputtered Al-1.8 to 92.5 at. % Cu films is a result of the difference in size between the aluminium and copper atoms. The low solubility of copper in aluminium (<1.8 at % Cu) is due to the valences of solvent and solute atoms in contrast with other sputtered films prepared under similar conditions, such as Al−Mg (20 at. % Mg), Al−Ti (27 at. % Ti), Al−Cr (5at. % Cr) and Al−Fe (5.5 at. % Fe) where the solubility is due to the difference in size.

Opis fizyczny
  • Département de Physique, Faculté des Sciences, Université Badji-Mokhtar, BP 12 Annaba, 23000, Algérie,
  • Département de Physique, Faculté des Sciences, Université Badji-Mokhtar, BP 12 Annaba, 23000, Algérie
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  • [3] M. Draissia and M.Y. Debili: “Atomic size effects on the hardness of r.f. Sputtered Al−Cu(Rich) thin films”, Journal of Crystal Growth, Vol. 270, (2004), pp. 250–254.[Crossref]
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  • [7] M.Y. Debili, Tran Huu Loï and C. Frantz: “Caractérisation chimique et structurale de dépôts métastables aluminium-fer obtenus par pulvérisation cathodique magnétron”, La revue de Métallurgie-CIT/Science et Génie des Matériaux, Vol. 12, (1998), pp. 1501–1509.
  • [8] Unpublished results: M. Draissia, H. Boudemagh and M.Y. Debili: “Observation d’une démixtion dans des films minces nanostructurés Al-66.64 at.%Cu obtenus par dépôt physique en phase vapeur (PVD)”, presented at the conference: The 3rd Int. Cong. on Mat. Sci. & Eng., Jijel (Algérie) 25–27 May 2004.
  • [9] Unpublished results: M. Draissia, H. Boudemagh and M.Y. Debili: “Unexpected phase separation in magnetron sputter-deposited Al−Cu thin films system”, presented at the conference: IX mes Journées Maghrébines des Sciences des Matériaux JMSM, Oran (Algérie) 8–10 May 2004.
  • [10] Unpublished results: M. Draissia and M.Y. Debili: “Corrosion behaviour of nanostructured aluminium-based alloys”, presented at the conference: 7 mes Journées Francophones des Jeunes Physico-Chimistes, Monastir (Tunisie) 19–21 March 2004.
  • [11] Unpublished results: M. Draissia, M.Y. Debili and J.P. Millet: “Structural and chemical properties of sputtered Al−Cu deposits”, presented at the conference: Eurocorr 2004, Nice (France) 12–16 September 2004.
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