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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Improving the glass-forming ability and plasticity of a TiCu-based bulk metallic glass composite by minor additions of Si

Texto completo
Autor(es):
Gargarella, P. [1, 2] ; Pauly, S. [2] ; Khoshkhoo, M. Samadi [2, 3] ; Kiminami, C. S. [1] ; Kuehn, U. [2] ; Eckert, J. [4, 5]
Número total de Autores: 6
Afiliação do(s) autor(es):
[1] Univ Fed Sao Carlos, Dept Engn Mat, Rodovia Washington Luiz, Km 235, BR-13565905 Sao Paulo - Brazil
[2] IFW Dresden, Inst Komplexe Mat, Helmholtzstr 20, D-01069 Dresden - Germany
[3] Carl Zeiss Microscopy GmbH, Carl Zeiss Promenade 10, D-07745 Jena - Germany
[4] Austrian Acad Sci, Erich Schmid Inst Mat Sci, Jahnstr 12, A-8700 Leoben - Austria
[5] Univ Leoben, Dept Mat Phys, Jahnstr 12, A-8700 Leoben - Austria
Número total de Afiliações: 5
Tipo de documento: Artigo Científico
Fonte: Journal of Alloys and Compounds; v. 663, p. 531-539, APR 5 2016.
Citações Web of Science: 12
Resumo

In this work, the effect of Si additions on the glass-forming ability (GFA) and the mechanical behaviour of a Ti42.5Cu42.5Ni7.5Zr7.5 alloy is investigated. An optimum GFA occurs for addition of 0.5 at% Si and it is explained based on a balance between two factors: an increased thermal stability of the supercooled liquid and the detrimental effect of Ti5Si3 on vitrification. On rapid cooling, composites consisting mainly of the cubic B2 phase and glass can form. Their plasticity increases with increasing Si additions without sacrificing their high yield strength. A characteristic core-shell microstructure is formed in the rod with 2 at% Si, for which the combination of an amorphous outer surface and a refined dendritic structure in the centre gives rise to a composite with enhanced mechanical properties. (C) 2015 Elsevier B.V. All rights reserved. (AU)

Processo FAPESP: 13/05987-8 - Processamento e caracterização de ligas metálicas amorfas, metaestáveis e nano-estruturadas
Beneficiário:Claudio Shyinti Kiminami
Linha de fomento: Auxílio à Pesquisa - Temático