Structural modifications in a Mn₅₄Al₄₃C₃ melt-spun alloy induced by mechanical milling and subsequent annealing investigated by atom probe tomography

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• 作者：J.M. Le Breton ; J. Bran ; E. Folcke ; M. Lucis ; R. Lard¨¦ ; M. Jean ; J.E. Shield
• 关键词：Nanostructured intermetallics ; Microalloying ; Mechanical alloying and milling
• 刊名：Journal of Alloys and Compounds
• 出版年：2013
• 出版时间：25 December, 2013
• 年：2013
• 卷：581
• 期：Complete
• 页码：86-90
• 全文大小：4189 K

文摘

The structural changes upon milling and subsequent annealing of a Mn₅₄Al₄₃C₃ alloy containing the intermetallic tetragonal L1₀ MnAl phase (¦Ó phase) as the major phase were investigated by X-ray diffraction and atom probe tomography. The analyses show that milling the starting powder for 10 h leads to the nanostructuration of the sample. The milled sample is partly oxidised and contains both non oxidised Mn_60¡À5Al_40¡À5 regions and oxidised regions. Annealing the powder for 1 h at 500 ¡ãC leads to enrichment in Al of the oxidised regions, and to the phase transformation of the non-oxidised regions into a nanostructured ¦Â-Mn-like phase with a composition close to Mn₃Al₂.