Solid state amorphization in the amorphous alloy Co66Nb22B12 by mechanical alloying

Autores/as

  • Federal University of Pernambuco
  • Federal University of Paraíba
  • Federal University of Pernambuco
  • Federal University of Pernambuco
  • Federal University of Pernambuco

DOI:

https://doi.org/10.17533/udea.rcm.26882

Palabras clave:

mechanical alloying, amorphous alloy Co-Nb-B, amorphization

Resumen

Elemental mixtures of powders Co, Nb and B with a stoichiometric composition of Nb-Co-B were prepared from the mechanical processing in a ball mill. The evolution of the structure of the starting powders and ground mixtures were characterized by X-ray diffraction and Differential Scanning Calorimetry and Scanning Electron Microscopy and spectroscopy Dispersion Energy (SEM / EDS). The alloy amorphous Co-Nb-B previously activated by high energy milling balls, involves two consecutive reactions amorphization. The mechanical grinding, first leads to amorphization reaction between layers of Co and B with a strong thermodynamic driving force, as well as for the rapid kinetics of Co-B amorphization compared with amorphized Co-Nb intermetallic phases. In further grinding the kinetic requirements for amorphization of Co-Nb reaction is observed and, consequently, the appearance and an Nb-B compound in the form of amorphous phase. The two amorphous phases resulting homogenized for a long grinding time.

|Resumen
= 66 veces | PDF
= 59 veces|

Descargas

Los datos de descargas todavía no están disponibles.

Biografía del autor/a

, Federal University of Pernambuco

Graduate Program in Chemical Engineering, Center for Technology and Geosciences (CTG), Federal University of Pernambuco, Recife, Brazil.

, Federal University of Paraíba

Postgraduate Program in Letters, Center for Human Sciences, Letters and Arts (CCHLA), Federal University of Paraíba, João Pessoa, Brazil.

, Federal University of Pernambuco

Graduate Program in Chemical Engineering, Center for Technology and Geosciences (CTG), Federal University of Pernambuco, Recife, Brazil.

, Federal University of Pernambuco

Postgraduate Program in Materials Science, Center for Exact and Nature Sciences (CCEN), Federal University of Pernambuco, Recife, Brazil.

, Federal University of Pernambuco

Graduate Program in Chemical Engineering, Center for Technology and Geosciences (CTG), Federal University of Pernambuco, Recife, Brazil.

Citas

Johnson, W.L., “Thermodynamic and kinetic aspects of the crystal to glass transformation in metallic materials”, Progress in Materials Science 30. pp. 81–134, 1986.

Suryanarayana, C., “Mechanical alloying and milling”, Progress in Materials Science 46, pp.1–184, 2001.

Nascimento, L., “Estudo das Ligas Amorfas na Reação de Oxidação com Aplicabilidade na síntese do Metanol e Produção de Olefinas”, Projeto de Tese de Doutorado (Doutorado em Engenharia Química), Universidade Federal de Pernambuco, Recife-PE, 2013.

Schwartz,r. B., "Metastable and Nanocrystalline Materials, In: M. D. BARÒ and S. SURINACH, Eds., Mechanically Alloyed”, Materials Science Forum, Trans. Tech. Publications, Zürich, Vol. 269-272, pp. 665,1998.

Zhao, Y. H., “Thermodynamic Model for Solid State Amorphization of Pure Elements by Mechanical-Milling”, Journal of Non-Crystalline Solids 352, pp. 5578-5585, 2006.

Azzaza, S.; Alleg, S.; Suñol, J. J., “Phase Transformation in the Ball Milled Fe31Co31Nb8B30Powders”, Advances in Materials Physics and Chemistry 3, pp. 90-100, 2013.

Mchenry, M. E.; WILLARD, M. A.; LAUGHLIN, D. E., “Amorphous and Nanocrystalline Materials for Applications as Soft Magnets”, Progress in Materials Science 44, pp. 291-433, 1999.

Dun,C.; Liu,H.; Shen,B., “Enhancement of plasticity in Co–Nb–B ternary bulk metallic glasses with ultrahigh strength”, Journal of Non-Crystalline Solids 358, pp. 3060–3064, 2012.

Dun,D.; Liu,H.; Houa,L.; Xue,L.; Dou,L.; Yang,W.; Zhao,Y.;Shen,B., “Ductile Co–Nb–B bulk metallic glass with ultrahigh strength”, Journal of Non-Crystalline Solids 386, pp.121–123, 2014.

Descargas

Publicado

2016-06-02

Cómo citar

L., A., A. L. C. L., R. J., & C. M. B. M. (2016). Solid state amorphization in the amorphous alloy Co66Nb22B12 by mechanical alloying. Revista Colombiana De Materiales, (8), 38–47. https://doi.org/10.17533/udea.rcm.26882

Número

Sección

Artículos

Artículos similares

1 2 3 4 > >> 

También puede {advancedSearchLink} para este artículo.