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BIBTEX RIS

Mechanical spectroscopy study of the Cu36Zr59Al5 and Cu54Zr40Al6 amorphous alloys

2012; Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímer; Volume: 15; Issue: 6 Linguagem: Inglês

10.1590/s1516-14392012005000138

ISSN

1980-5373

Autores

Paulo Wilmar Barbosa Marques, Javier Andrés Muñoz Chaves, Paulo Sergio Silva, Odila Florêncio, Maíra Martins Garcia, Luis César Rodríguez Aliaga, Walter José Botta Filho,

Tópico(s)

Phase-change materials and chalcogenides

Resumo

A mechanical spectroscopy study of Cu-Zr-Al bulk metallic glasses, was performed with two types of equipment: a Kê-type inverted torsion pendulum and an acoustic elastometer, working in the frequency ranges of Hz and kHz, respectively, with a heating rate of 1 K/min. The analysis of the anelastic relaxation shows similar spectra for both types of equipment resulting in internal friction patterns that vary with temperature and are not reproducible at each thermal cycle. The normalized of the square of the frequency changes from the first to later measurement cycles. These results indicate that the specimens of Cu-Zr-Al alloys were changing by mechanical relaxation, owing to the motion of atoms or clusters in the glassy state and possible "defects" produced during the processing of alloys.

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