Woodruff School of Mechanical Engineering GT Courtesy Listing

Title: Phase Equilibrium in the Pd-Hydrogen System Speaker: Dr. Ricardo B. Schwarz Affiliation: Materials Science and Technology Division, Los Alamos National Laboratory When: Tuesday, September 22, 2009 at 3:00:00 PM Where: Love Building, Room 183 Host: Faisal Alamgir faisal.alamgir@mse.gatech.edu 404-385-3263 Abstract Although palladium and hydrogen form one of the simplest interstitial alloy systems one can think of, many aspects of this system are poorly understood. In particular, there is no satisfactory explanation for the hysteresis between the pressures required for absorption and desorption of hydrogen. We present a thermodynamic model for metal-hydrogen systems which explains the hysteresis and suggests a new Pd-H phase diagram. Biography Ricardo Schwarz is a Laboratory Fellow at the Los Alamos National Laboratory, New Mexico. Before coming to Los Alamos in 1985, Ricardo worked at the University of Illinois (Urbana-Champaign), Argonne National Laboratory, and Caltech. Ricardo’s recent work has addressed the synthesis and properties of bulk metallic glasses, the properties of hydrogen in metals, and the formation of 3He bubbles and swelling of tritated metals. He is a fellow of ASM and of TMS, and is member of the US Academy of Engineering.