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I. Chicinas, V. Pop, O. Isnard. Synthesis of The Supermalloy Powders by Mechanical Alloying. Journal of Materials Science, 39, pp. 5305-5309, 2004.

Abstract: The mixture of the Ni, Fe and Mo elemental powders with the nominal composition of the Supermalloy was milled in a planetary mill under Ar atmosphere. Several milling times have been used ranging from 4 to 16 h. A heat treatment of 30 min, 1, 2 and 4 h at temperature of 350C has been performed in vacuum in order to improve the alloying process and remove the internal stresses. The formation of the Fe-Ni-Mo alloys by mechanical alloying was evidenced by X-ray diffraction. The nanocrystalline Supermalloy powders have been obtained after 16 h milling and after 8 h milling followed by 4 h annealing. A typical grain size of 11 ± 2 nm have been obtained after 16 h milling. The chemical homogeneity composition and the morphology of the powder particles have been studied by X-ray microanalysis and scanning electron microscopy respectively.

Keywords: Supermalloy, nanocrystalline powders, mechanical alloying, X-ray microanalysis, SEM

Posted by Ionel Chicinas

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