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2014 | 126 | 2 | 629-632
Article title

Leaching of Al-Based Polygrain Quasicrystalline and Related Crystalline Surfaces

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EN
Abstracts
EN
In the present investigation, we have studied leaching on polygrain Al-based quasicrystalline (i-Al_{63}Cu_{25}Fe_{12}) as well as crystalline (B2 phase; Al_{55}Cu_{30}Fe_{15}) alloy surfaces using a 10 mole NaOH solution. The surface was leached at varying times from 30 min to 8 h and subsequently characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy and energy dispersive X-ray analysis. Leaching of the samples for 30 min generated a homogeneous layer. However further leaching for 1-8 h yielded nano-size particles on the surface. Spherical microstructure has been observed on the Al-Cu-Fe crystalline surface whereas on the quasicrystalline surface a petal-like microstructure appeared. The implications of the evolution of different microstructures in the context of structure, stability and activity are discussed. The results are compared with the microstructure of leached polygrained samples containing a mixture of different surface orientations.
Keywords
Year
Volume
126
Issue
2
Pages
629-632
Physical description
Dates
published
2014-08
References
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Document Type
Publication order reference
YADDA identifier
bwmeta1.element.bwnjournal-article-appv126n251kz
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