Rapid microwave-assisted synthesis of zirconium aluminide

Author(s)

Carvalho-Jr, Waldemir M. ; Souza, Flavio L. ^[1] ; Santos, Sydney Ferreira ^[1] ; Bobet, Jean-Louis ^[2]

Affiliation

^[1] Carvalho-Jr, Jr., Waldemir M., Univ Fed ABC, Ave Estados 5001, BR-09210580 Santo Andre, SP - Brazil

^[2] Carvalho-Jr, Jr., Waldemir M., Univ Bordeaux, ICMCB, CNRS, 87 Ave Dr Schweitzer, F-33600 Pessac - France

• Document type: Journal article
• Source: Materials Chemistry and Physics; v. 211, p. 249-257, JUN 1 2018.
• Web of Science Citations: 2

Abstract

Here we show a fast and direct zirconium aluminide alloys manufacturing process using the microwave-assisted technique. The rapid microwave-assisted synthesis was performed using two different starting precursors (Zr and ZrH2) revealing the ZrAl3 phase as the main phase formation, with a small percentage of ZrAl2. The phase formation and their percentages were evaluated and confirmed by combining X-ray diffraction and chemical analysis data. In addition, the scanning electron microscopy revealed that the bodies based on ZrH2 samples showed smaller particle size compared with the Zr ones. This was attributed to the microwave radiation concentration that might lead several dehydrogenation sites to generate a non-homogeneity reducing the particle. These findings provide a novel, rapid and versatile method to design zirconium aluminide alloys according to the desired application by controlling the starting precursors (Zr or ZrH2) and microwave exposure time. (C) 2018 Elsevier B.V. All rights reserved. (AU)

• FAPESP's process: 13/05471-1 - Effect of dopants in semiconductor nanostructures and their impact on photocatalytic performance
• Grantee: Waldemir Moura de Carvalho Junior
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 13/07296-2 - CDMF - Center for the Development of Functional Materials
• Grantee: Elson Longo da Silva
• Support Opportunities: Research Grants - Research, Innovation and Dissemination Centers - RIDC