ISSN 2594-5327
48º Congresso anual — Vol. 48, Num. 1 (1993)
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Resumo
Cr-Fe system is considered to be difficult to form an amorphous alloy by melt-spinning technique because the two constituents have the similar atomic size. However, it may be conceivable that, if the periodic structure is destroyed at a lower temperature and the subsequent relaxation toward a crystalline structure does not occur, the resulting amorphous structure will be retained. In this work, Cr₁₋ₓFeₓ powder alloys, with initial compositions x = 0.06, 0.28, 0.80 and 1.00 and final composition 0.15, 0.35, 0.80 and 1.0, have been mechanically milled at room temperature. The structural evolution of the powders was followed by X-ray diffraction and Mössbauer spectroscopy. The results indicate that an amorphous structure can be formed for example x = 0.35 by long time milling, while the other powders remain in their original structures but have few nanometers in grain size. The mechanism of amorphization in this system has been discussed based on the thermodynamics of the system.
Palavras-chave
Cr-Fe alloys, mechanical milling, amorphization, nanomaterials, Mössbauer spectroscopy, X-ray diffraction
Como citar
Xia, S. K.; BaggioSaitovitch, E.; Assunção, F. C. Rizzo.
A Structural Study of Cr/Fe Powder Alloys Prepared by Mechanical Milling,
p. 451-464.
In: 48º Congresso anual,
Rio de Janeiro, Brasil,
1993.
ISSN: 2594-5327, DOI 10.5151/2594-5327-48v1-451-464
