Reaction in solid state amorphization in the alloy amorphous Co66Nb22B15

Reaction in solid state amorphization in the alloy amorphous Co66Nb22B15

Authors

  • Luciano Nascimento Federal University of Paraiba

DOI:

https://doi.org/10.5433/1679-0375.2016v37n2p73

Keywords:

Mechanical Alloying, Amorphous Alloy Co-Nb-B, Amorphization

Abstract

Elemental mixtures of Co, Nb and B powders of a stoichiometric composition of 1: 1: 1 respectively is prepared from the mechanical processing in a high energy. The structure of the starting powders and grinded mixtures were characterized by X-Ray Diffraction and Differential Scanning Calorimetry(DSC) and Scanning Electron Microscopy and Spectroscopy Dispersion Energy (SEM / EDS). The amorphous alloy, Co-Nb-B was previously activated by high energy milling balls, involves two consecutive reactions amorphization. The mechanical milling, first leads to amorphization reaction between layers of Co and B with a strong thermodynamic driving force as well as for the rapid kinetics Co-B amorphization compared with Co-Nb intermetallic phases in amorphization. In further grinding the kinetic requirements for amorphization of Co-Nb reaction is observed and, consequently, the appearance and Nb-B compound in the form of amorphous phases. The two amorphous phases resulting homogenized by grinding over time.

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Author Biography

Luciano Nascimento, Federal University of Paraiba

Licenciado em Física (UFPB),Bacharel em Física (UFCG),Especialista em Matemática (IMPA/UFPB),Mestre em Ciências de Materiais( UFPB) ,Doutor em Engenharia Química (UFPE).

Published

2016-08-16

How to Cite

Nascimento, L. (2016). Reaction in solid state amorphization in the alloy amorphous Co66Nb22B15. Semina: Ciências Exatas E Tecnológicas, 37(2), 73–80. https://doi.org/10.5433/1679-0375.2016v37n2p73

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Original Article

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