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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

The formation of quasicrystals in Al-Cu-Fe-(M=Cr, Ni) melt-spun ribbons

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Author(s):
Wolf, W. [1] ; Coury, F. G. [2] ; Kaufman, M. J. [2] ; Bolfarini, C. [3] ; Kiminami, C. S. [3] ; Botta, W. J. [3]
Total Authors: 6
Affiliation:
[1] Univ Fed Sao Carlos, Programa Posgrad Ciencia & Engn Mat, Rod Washington Luiz, Km 235, BR-13565905 Sao Carlos, SP - Brazil
[2] Colorado Sch Mines, Dept Met & Mat Engn, Golden, CO 80401 - USA
[3] Univ Fed Sao Carlos, Dept Engn Mat, Rod Washington Luiz, Km 235, BR-13565905 Sao Carlos, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: Journal of Alloys and Compounds; v. 731, p. 1288-1294, JAN 15 2018.
Web of Science Citations: 3
Abstract

The influence of Cr and Ni additions in rapidly-solidified Al-Cu-Fe alloys was investigated. Four compositions, namely, Al64Cu20Fe13Ni3, Al63Cu18Fe10Ni9, Al65Cu22Fe10Cr3 and Al67Cu20Fe5Cr8 were selected based on a methodology in which the average valence electron per atom (e/a) ratio of the ternary Al-Cu-Fe quasicrystal was maintained constant. Melt-spun ribbons of all four alloys were produced and then examined by X-ray diffraction, transmission electron microscopy and energy dispersive X-ray spectroscopy. The results indicate that the Al-Cu-Fe icosahedral quasicrystalline phase has limited solubility for Ni such that with increasing Ni content, the fraction of the quasicrystalline phase decreased drastically and two primitive B2 cubic phases were formed instead. Additions of Cr resulted in the formation of a decagonal quasicrystal at the expense of the icosahedral phase. At 3 at% Cr, both icosahedral and decagonal phases were observed, with the former having the major volume fraction. For the alloy containing 8 at% Cr, only the decagonal phase was observed. (C) 2017 Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 13/05987-8 - Processing and characterization of amorphous, metastable and nano-structured metallic alloys
Grantee:Claudio Shyinti Kiminami
Support Opportunities: Research Projects - Thematic Grants
FAPESP's process: 15/09008-0 - Fabrication of aluminum alloys with quasicrystalline and intermetallic phases with low friction coefficient and low superficial adhesion energy for coating applications on the petrochemical industry
Grantee:Witor Wolf
Support Opportunities: Scholarships in Brazil - Doctorate