A surface chemical analysis strategy for the microstructural changes in a CuAgZrCr alloy cast under oxidation conditions

Ernesto G. Maffia , Mercedes Muñoz , Pablo A. Fetsis , Carmen I. Cabello , Delia Gazzoli , Aldo A. Rubert

Abstract

The aim of this work was to determine the behavior of alloy elements and compounds formed during solidification in the manufacturing process of the CuAgZrCr alloy under an oxidizing environment. Bulk and surface analysis techniques, such as Scanning Electron Microscopy (SEM), X-ray Photoelectron Spectroscopy (XPS), Raman and X-ray diffraction (XRD) were used to characterize the phases obtained in the solidification process. In order to focus the analysis on the on grain boundary interface, partial removal of the matrix phase by acid attack was performed. The compositional differences obtained by SEM-EDX, Raman and XPS on post-manufacturing materials allowed us to conclude that the composition of grain boundaries of the alloy is directly influenced by the oxidizing environment of alloy manufacturing.

Key Words

intermetallic phases; microstructure CuAgZrCr cast-alloy; surface chemical analyses

Address

Ernesto G. Maffia — Departamento de Mecánica de la Facultad de Ingeniería, Universidad Nacional de La Plata, Calle 1 y 47 (1900)- La Plata, Buenos Aires, Argentina
Mercedes Muñoz and Pablo A. Fetsis — CINDECA-CCT- CONICET-CIC- Universidad Nacional de La Plata, Calle 47 No 257 (1900)- La Plata, Buenos Aires, Argentina
Carmen I. Cabello — 1) CINDECA-CCT- CONICET-CIC- Universidad Nacional de La Plata, Calle 47 No 257 (1900)- La Plata, Buenos Aires, Argentina, 2) Comisión de Investigaciones Científicas Pcia. Bs.As.CIC PBA Facultad de Ingeniería Universidad Nacional de La Plata, Calle 1 y 47 (1900)- La Plata, Buenos Aires, Argentina
Delia Gazzoli — Dipartimento di Chimica, "Sapienza" Universitá di Roma, Ple. Aldo Moro 5 (00185) Rome, Italy
Aldo A. Rubert — Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), Calle 64(SN) e/ Bv. 113 y 120, Universidad Nacional de La Plata CONICET, (1900) La Plata, Buenos Aires, Argentina

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