Investigation of AgAlCuZr amorphous/crystalline structure produced by casting and milling

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• 作者：K. Tomolya ; D. Janovszky ; A. Sycheva ; M. Benke ; Cs. Erd艖hegyi ; A. Roosz
• 关键词：AgAlCuZr ; Amorphous alloy ; Casting ; Milling
• 刊名：Journal of Alloys and Compounds
• 出版年：15 February, 2014
• 年：2014
• 卷：586
• 期：supp_S1
• 页码：S184-S188
• 全文大小：1458 K

文摘

Advanced Ag₈Al₈Cu₃₆Zr₄₈ master alloys were produced by arc- and induction melting and examined. The arc-melted ingot has an amorphous structure with a certain amount of metastable phase, compared to the induction-melted ingot, which contained AlCu₂Zr, CuZr₂ and Ag₃Al phases. Amorphous wedge-shape samples were produced by centrifugal casting from the arc-melted master alloy. Amorphous/crystalline powders were synthesized by ball-milling with different milling times from the induction-melted master alloy. The resulting powder contained Ag₂Al phase after 5 h milling, the amount of which was reduced after 9 h milling. The thermal stability of the samples was investigated by DSC. The effective activation energies of the first crystallization were evaluated according to Kissinger鈥檚 method and there were found to be the same, 271-268 J/g. The low activation energy suggests a good ductility.