Artículos de revistas
Preparation and characterization of Zircaloy 4-Tantalum alloys for application in corrosive media
Fecha
2012Registro en:
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS, OXFORD, v. 35, n. 11, supl. 1, Part 3, pp. 90-95, NOV, 2012
0263-4368
10.1016/j.ijrmhm.2012.04.008
Autor
Robin, Alain Laurent Marie
Gomes, Eduardo A.
Nunes, Carlos Angelo
Coelho, Gilberto Carvalho
Baldan, Carlos Alberto
Institución
Resumen
Two Zircaloy 4-Ta alloys (14 and 55 wt.% Ta) were produced by arc-melting. The alloys were hot-rolled at 900 degrees C and heat-treated under argon atmosphere for 100 h at 700 degrees C. The alloys were analyzed by scanning electron microscopy and X-ray diffractometry. The microstructure of both rolled and heat-treated alloys is constituted of (beta Zr,Ta)-II Ta-rich precipitates dispersed in a (alpha Zr) matrix. Corrosion tests performed in boiling concentrated H2SO4 solutions showed that the Zircaloy 4-Ta alloys are more corrosion resistant than Zircaloy 4 and that the corrosion resistance increases with increasing Ta content. (c) 2012 Elsevier Ltd. All rights reserved.