Reação no estado sólido na amorfização da liga amorfa Co66Nb22B15

Luciano Nascimento

doi:10.5433/1679-0375.2016v37n2p73

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.

Downloads

Download data is not yet available.

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).

Downloads

PDF (Português (Brasil))

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

Download Citation

Issue

Vol. 37 No. 2 (2016)

Section

Original Article

License

The Copyright Declaration for articles published in this journal is the author’s right. Since manuscripts are published in an open access Journal, they are free to use, with their own attributions, in educational and non-commercial applications. The Journal has the right to make, in the original document, changes regarding linguistic norms, orthography, and grammar, with the purpose of ensuring the standard norms of the language and the credibility of the Journal. It will, however, respect the writing style of the authors. When necessary, conceptual changes, corrections, or suggestions will be forwarded to the authors. In such cases, the manuscript shall be subjected to a new evaluation after revision. Responsibility for the opinions expressed in the manuscripts lies entirely with the authors.

This journal is licensed with a license Creative Commons Attribution-NonCommercial 4.0 International.