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XRD and HREM studies from the decomposition of icosahedral AlCuFe single-phase by high-energy ball milling
- Source :
-
Journal of Alloys & Compounds . Oct2011, Vol. 509 Issue 41, p10036-10039. 4p. - Publication Year :
- 2011
-
Abstract
- Abstract: In this investigation the Al64Cu24Fe12 alloy was melted in an induction furnace and solidified under normal casting conditions. In order to obtain the icosahedral phase (i-phase) in a single-phase region, the as-cast sample was subject to a heat treatment at 700°C under argon atmosphere. Subsequently, the i-phase was milled for different times in order to evaluate phase stability under heavy deformation. X-ray diffraction (XRD) and high-resolution electron microscopy (HREM) analysis were conducted to the structural characterization of ball-milled powders. XRD results indicated a reduction in quasicrystal size during mechanical ball milling to about 30h. HREM analysis revealed the presence of aperiodic nano-domains, for example, with apparent fivefold symmetry axis. Therefore, the i-phase remains stable over the first 30h of ball-milling time. However, among 30–50h of mechanical milling the i-phase transforms progressively into β-cubic phase. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 09258388
- Volume :
- 509
- Issue :
- 41
- Database :
- Academic Search Index
- Journal :
- Journal of Alloys & Compounds
- Publication Type :
- Academic Journal
- Accession number :
- 65496889
- Full Text :
- https://doi.org/10.1016/j.jallcom.2011.08.026