Sahoo, K L and Mitra, A and Ghosh, S (2005) Effect of rare-earth Elements on Nanophase Evolution, Crystallization Behaviour and Mechanical Properties in Al-Ni-R (R = La/Mischmetal) Amorphous Alloys. Pramana - journal of physics, 65 (4). pp. 745-751.
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Abstract
The crystallization behaviour and evolution of nanoparticles in amorphous Al-Ni-Mischmetal (Mm) and Al-Ni-La alloys during heat treatment have been studied. Rapidly solidified ribbons were obtained by induction melting and ejecting the melt onto a rotating Cu wheel in an Ar atmosphere. The crystallization behaviour of the melt-spun ribbons was investigated using differential scanning calorimetry and X-ray diffractometry (XRD). XRD studies confirmed that all the ribbons were fully amorphous. Al-Ni-Mm systems showed a three-stage crystallization process whereas Al-Ni-La system, in general, showed a two-stage crystallization process on annealing. Crystallization kinetics was analysed by Kissinger and Johnson-Mehl-Avrami approaches. In Al-Ni-La alloys, the crystallization pathways depend on the La concentration. Microhardness of all the ribbons was examined at different temperatures and correlated with the corresponding evolution of phases.
Item Type: | Article |
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Official URL/DOI: | http://www.ias.ac.in/pramana/v65/p745/fulltext.pdf |
Uncontrolled Keywords: | Aluminium-based amorphous alloys; melt spinning; crystallization behaviour; microhardness |
Divisions: | Metal Extraction and Forming |
ID Code: | 6 |
Deposited By: | Madhan M |
Deposited On: | 20 Sep 2009 00:26 |
Last Modified: | 08 Feb 2012 17:03 |
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