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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 effect of oxygen on the microstructural evolution in crystallized Cu-Zr-Al metallic glasses

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Author(s):
Coury, F. G. [1] ; Botta, W. J. [1] ; Bolfarini, C. [1] ; Kiminami, C. S. [1] ; Kaufman, M. J. [2]
Total Authors: 5
Affiliation:
[1] Univ Fed Sao Carlos, Dept Mat Engn, BR-13565905 Sao Carlos, SP - Brazil
[2] Colorado Sch Mines, Dept Met & Mat Engn, Golden, CO 80401 - USA
Total Affiliations: 2
Document type: Journal article
Source: INTERMETALLICS; v. 65, p. 51-55, OCT 2015.
Web of Science Citations: 0
Abstract

Cu-45Zr-8Al and Cu-44.1Zr-7.8Al-2Y metallic glass ribbons were prepared by melt spinning and heat treated at two different temperatures followed by microstructural characterization by SEM and TEM. The compositions were selected to better understand the effect that oxygen has in the sequence and morphology of the phases formed during devitrification. A novel microstructure consisting of the Heusler Cu2ZrAl phase precipitated inside a B2-CuZr matrix that has shape memory properties was produced. It is proposed that this novel microstructure may be used to prepare samples with improved shape memory responses. The known cube cube relationship between the Heusler and B2 phases also provides direct evidence about the orientation relationship between the martensite and the parent B2 austenite and the results are in contrast to what is reported in the literature. The results also confirm that oxygen dissolved in these alloys leads to the formation of the B2 CuZr phase at lower temperatures than comparable low oxygen alloys. (C) 2015 Elsevier Ltd. All rights reserved. (AU)

FAPESP's process: 10/05856-2 - Processing and Characterization of bulk amorphous alloys from Cu-Zr-Al system
Grantee:Francisco Gil Coury
Support type: Scholarships in Brazil - Scientific Initiation
FAPESP's process: 12/21424-0 - Characterization of CuZrAl samples by electron microscopy
Grantee:Francisco Gil Coury
Support type: Scholarships abroad - Research Internship - Scientific Initiation