About this Abstract |
Meeting |
MS&T24: Materials Science & Technology
|
Symposium
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Controlled Synthesis, Processing, and Applications of Structural and Functional Nanomaterials
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Presentation Title |
Immiscible Nanostructured Aluminum Alloys for Hydrogen Generation |
Author(s) |
Billy Chad Hornbuckle, Anthony Robertes, Anit Giri, Sean Fudger, Tom Luckenbaugh, Kris Darling |
On-Site Speaker (Planned) |
Billy Chad Hornbuckle |
Abstract Scope |
Within the Army Research Laboratory, a group has been utilizing high-energy ball milling to generate immiscible alloys via mechanical alloying. These immiscible alloys have revealed a number of unique properties not possible through conventional casting techniques. Two of these unique alloy systems are Al-Sn and Al-Bi that have been found to cause the rapid release of H through hydrolysis when the alloy encounters any liquid containing water. This reaction can occur without the addition of any acids, bases, or toxic elements typically required with other aluminum-based alloys. This reaction can approach the theoretical yield of hydrogen from one gram of aluminum in short time frame, while half the energy of the reaction is released in the form of heat (4.4 kW). This behavior is due to the unique microstructure generated from the processing yielding a high number density of galvanic couples throughout the Al matrix preventing it from passivating. |