Multicomponent Y-M-Al-Co(M=Ce, Nd or Pr) Amorphous Alloys Developed by Equiatomic Substitution

Abstract:

Novel multicomponent amorphous alloys have been manufactured by the method of equiatomic substitution for the Y element in Y56Al24Co20 amorphous alloy. Y56-xMxAl24Co20(M=Ce, Pr or Nd; x= 5, 10, 15 and 20at.%) alloys with a diameter of 2 mm have been prepared by suction casting. The glass-forming ability(GFA) was characterized by differential scanning calorimetry(DSC). The supercooled liquid region ∆Tx(=Tx-Tg ) and parameter γ (=Tx/(Tg+Tl)) increase with the increasing of the addition element content. The effects of equiatomic element on ∆Tx of Y56Al24Co20 alloy arise from the increasing of the electronegativity difference Δx, the atomic size parameter δ and the valence electron difference Δn. The results suggest that the GFA of some alloys might be improved by the addition of other equiatomic elements substitution for the alloy constituent elements.

• Periodical: Applied Mechanics and Materials (Volumes 268-270)
• Pages: 301-307
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.268-270.301
• Online since: December 2012
• Authors: Shi Wen He
• Keywords: Amorphous Alloy, Bond Parameter, Equiatomic Substitution, Glass-Forming Ability, Rare-Earth-Based Alloy

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