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|Type:||Artigo de periódico|
|Title:||Influence Of Mechanical Stress On The Microstructure Of As-cast Fe 74(nd1-xmmx)20b6 Alloys, Mm = Brazilian Misch Metal|
De Souza C.P.
|Abstract:||Partial replacement of neodymium by cerium-rich Brazilian misch metal, has been studied on Fe74(Nd1-xXMMx) 20B6 alloys by X-ray diffraction, thermomagnetic analysis, microprobe analysis and optical microscopy. Misch metal refers to a mixture of light rare-earth metals containing 56% Ce, 18% La, 13% Nd, 05% Pr, 02% Fe and 10% others rare-earths (wt%). Intermetallic compounds of Fe74(Nd 1-xMMx)20B6 with x = 0.5, 0.7 and 0.9 were investigated. As-cast, pre-milled alloys present a binary microstructure with the Fe14Nd2B compound as matrix phase and Fe 2MM. The amount of Fe2 MM increases and the Curie temperature of the 14:2:1 compound decreases with increasing x. When these samples are submitted to 30 min of very high energy ball milling, the signal of the 14:2:1 phase disappears and the formation of a microstructure is observed with a new ferromagnetic stable phase with Tc around 500°C together with an increase of α-Fe in comparison for pre-milled samples. © 2001 Elsevier Science B.V. All rights reserved.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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