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Processing and characterization of bulk amorphous alloys from Cu-Zr-Al system

Grant number: 10/05856-2
Support type:Scholarships in Brazil - Scientific Initiation
Effective date (Start): May 01, 2010
Effective date (End): September 30, 2013
Field of knowledge:Engineering - Materials and Metallurgical Engineering
Principal Investigator:Claudio Shyinti Kiminami
Grantee:Francisco Gil Coury
Home Institution: Centro de Ciências Exatas e de Tecnologia (CCET). Universidade Federal de São Carlos (UFSCAR). São Carlos , SP, Brazil
Associated research grant:05/59594-0 - Properties of amorphous, metastable and nano-structured metallic alloys, AP.TEM
Associated scholarship(s):12/21424-0 - Characterization of CuZrAl samples by electron microscopy, BE.EP.IC

Abstract

For more than one and half decade the research group on Amorphous and Nanocrystalline Metallic Materials from DEMA-UFSCar have work on new alloys compositions with high glass forming ability. In these works was and still is present the challenger to develop procedures and processes which allow the production of bulk samples (in millimeters in scale) with exact chemical composition as specified and with imposition of high cooling rate in whole sample volume. The present work plan for a Scientific Iniciation student is part of this work and has the goal to develop new compositions with high glass forming ability from Cu-Zr-Al system; and also is focused on the development of technique to processing these new compositions by casting in permanent metallic mould. The work plan includes the alloys preparation and its processing by casting methodology. The alloys compositions have been selected by using semi-empirical criteria based on topological instability and electro negativity average difference among the composition elements; these alloys compositions have been presented in previous work that are able to glass formation when processed by imposing very high cooling rates (106K/s )in ribbons shaped samples with microns dimensions. The present work is part of the thematic project (proc. n. 2005/59594-0) Properties of Amorphous, Metastable and Nano-Structured Metallic Alloys.

Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
COURY, F. G.; BOTTA, W. J.; BOLFARINI, C.; KIMINAMI, C. S.; KAUFMAN, M. J. The effect of oxygen on the microstructural evolution in crystallized Cu-Zr-Al metallic glasses. INTERMETALLICS, v. 65, p. 51-55, OCT 2015. Web of Science Citations: 0.
COURY, F. G.; BOTTA, W. J.; BOLFARINI, C.; KIMINAMI, C. S.; KAUFMAN, M. J. The role of yttrium and oxygen on the crystallization behavior of a Cu-Zr-Al metallic glass. Journal of Non-Crystalline Solids, v. 406, p. 79-87, DEC 15 2014. Web of Science Citations: 6.

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