Effects of Alloy Compositions on Amorphization and Crystallization of Al-Ni-Ce-C Powders by Mechanical Alloying

Abstract:

In the present work, Al-Ni-Ce-C amorphous powders with different compositions have been prepared by a high energy ball milling technique. The amorphization behaviors of the Al-Ni-Ce-C powders have been studied using X-ray diffraction and transmission electron microscopy. The results show that alloy compositions have a great influence on the amorphization behavior of the Al-Ni-Ce-C powders and the optimum composition is Al₈₅Ni₁₀Ce₅+1 wt.% C for the formation of amorphous phase. The thermal stability of the as-milled powders has been investigated by differential scanning calorimetry. It has been found that the compositional effects on thermal stability are similar to those on the amorphization of Al-Ni-Ce-C. In addition, the more addition of carbon decreases both glass forming ability and thermal stability of the Al-Ni-Ce-C system under ball milling conditions. Furthermore, comparison has been carried out between Al₈₅Ni₁₀Ce₅+1 wt.% C amorphous powders and Al₈₅Ni₁₀Ce₅ glassy ribbons with respect to thermal stability.

• Periodical: Applied Mechanics and Materials (Volumes 66-68)
• Pages: 2109-2116
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.66-68.2109
• Online since: July 2011
• Authors: Jun Hua Chen, Song Zhang, Ying Jie Qu
• Keywords: Amorphisation, Amorphous Alloy, Compositional Effect, Mechanical Alloying (MA), Thermal Stability

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