|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||2018 Technical Division Student Poster Competition
||SPU-10: Porous Metal from Selective Dissolution of Al-Cu-Mg Alloy
||Keishlyann Báez Cruz, Juan Carlos Vargas , Oscar Marcelo Suárez, Johnattan Díaz
|On-Site Speaker (Planned)
||Keishlyann Báez Cruz
A new porous metallic material was synthetized through the selective dissolution of a primary Al phase in a two-phase alloy from the ternary Al-Cu-Mg system. A precursor Al-25.48wt%Cu-10.96wt%Mg alloy was melted at ~800oC and then poured into a copper mold at the same temperature. A cold copper sheet cover was placed onto the mold which then water cooled to increase solidification rate and refine the microstructure. 10x10x2mm samples were annealed to stabilize the microstructure. After polishing the specimens, we subject to free corrosion for 24 hours on a 9 vol% aqueous NaOH electrolyte, as voltage and current were monitored. Scanning electron microscopy allowed measuring the pore and ligament sizes. Secondary electron images showed pores and ligaments of tens of nanometers. In addition x-ray diffractograms showed the complete removal of the primary phase (αAl). Additionally, the surface area of the etched samples was determined using a surface analyzer.