Effect of La on the crystallization behaviour of amorphous Al94 − xNi6Lax (x = 4–7) alloys

Sahoo, K L and Wollgarten, M and Haug, J and Banhart, J (2005) Effect of La on the crystallization behaviour of amorphous Al94 − xNi6Lax (x = 4–7) alloys. Acta Materialia, 53 (14). pp. 3861-3870.

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Melt spun and annealed Al-alloys containing 6 at.% Ni and 4–7 at.% La were investigated by means of differential scanning calorimetry (DSC), X-ray diffractometry (XRD), small angle neutron scattering (SANS), transmission electron microscopy and hardness measurements. XRD studies revealed that all the ribbons were fully amorphous, whereas SANS indicated concentration fluctuations. DSC showed that the amorphous alloys undergo a two-stage crystallization process upon heating. The details of the crystallization pathway depend on the La concentration. Upon annealing, SANS measurements revealed two different distributions of particles which can be explained by a core shell structure or two different types of particles. Moreover, significant changes in hardness occur which are attributed to changes in microstructure.

Item Type:Article
Official URL/DOI:http://dx.doi.org/10.1016/j.actamat.2005.04.034
Uncontrolled Keywords:Metallic glass; Al-alloys; Small angle neutron scattering; Differential scanning calorimetry; Crystallization
Divisions:Metal Extraction and Forming
ID Code:1173
Deposited By:Dr. A K Sahu
Deposited On:23 Jun 2010 14:13
Last Modified:08 Feb 2012 17:09
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