Leaching of Al-Based Polygrain Quasicrystalline and Related Crystalline Surfaces

• Authors: T. Yadav , S. Mishra , S. Pandey , D. Singh , M. Lowe , R. Tamura , N. Mukhopadhyay , O. Srivastava , R. McGrath , H. Sharma
• Languages of publication: 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

EN

61.44.Br; 81.16.Hc; 61.66.Dk; 68.37.Hk

Discipline

• 81.16.Hc: Catalytic methods
• 68.37.Hk: Scanning electron microscopy (SEM) (including EBIC)
• 61.44.Br: Quasicrystals
• 61.66.Dk: Alloys

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2014
• Volume: 126
• Issue: 2
• Pages: 629-632

Dates

published

2014-08

Contributors

author

T. Yadav

• Hydrogen Energy Centre, Department of Physics (Centre of Advance Studies)

author

S. Mishra

• Hydrogen Energy Centre, Department of Physics (Centre of Advance Studies)

author

S. Pandey

• Hydrogen Energy Centre, Department of Physics (Centre of Advance Studies)

author

D. Singh

• Hydrogen Energy Centre, Department of Physics (Centre of Advance Studies)

author

M. Lowe

• Surface Science Research Centre and Department of Physics, The University of Liverpool, Liverpool, L69 3BX, UK

author

R. Tamura

• Department of Materials Science and Technology, Tokyo University of Science, Noda 278-8510, Japan

author

N. Mukhopadhyay

• Department of Metallurgical Engineering, Indian Institute of Technology, Banaras Hindu University, Varanasi, 221005, India

author

O. Srivastava

• Hydrogen Energy Centre, Department of Physics (Centre of Advance Studies)

author

R. McGrath

• Surface Science Research Centre and Department of Physics, The University of Liverpool, Liverpool, L69 3BX, UK

author

H. Sharma

• Surface Science Research Centre and Department of Physics, The University of Liverpool, Liverpool, L69 3BX, UK

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Identifiers

DOI

10.12693/APhysPolA.126.629