Thermal stability and hydrogen absorption characteristics of palladium-yttrium nanoalloys

✍ Scribed by K.J. Bryden; J.Y. Ying

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 834 KB
• Volume: 44
• Category: Article
• ISSN: 1359-6454
• DOI: 10.1016/1359-6454(96)00020-1

✦ Synopsis

Nanostructured alloys consisting of IO,20 and 30 at.% Y in Pd were synthesized by high-energy ball-milling to determine the thermal stability and hydriding behavior of different alloy compositions. Adding 10 at.% Y to the Pd resulted in a nanoalloy that was stable against grain growth to above 4OO"C, as compared to 200°C for ball-milled pure Pd. Adding 20 and 30 at.% Y resulted in a supersaturated solution of Y in Pd and in the Pd3Y intermetallic phase, respectively. Both the supersaturated solution and the intermetallic phase exhibited stability against grain growth to above 400°C and interesting phase segregation behavior in heat treatment. In addition to stabilizing against grain growth, doping the Pd with Y also suppressed the a+/3 phase transition.