| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Porous Materials for Energy and Environment Applications
|
| Presentation Title |
Second Phase and Solid Solution Strengthening in Metallic Nanofoams |
| Author(s) |
David F. Bahr, Alexandra Loiza |
| On-Site Speaker (Planned) |
David F. Bahr |
| Abstract Scope |
Materials with nm scale dimensions (ligaments in foams) form can exhibit high yield strengths. We examined the solid solution and second phase particle strengthening to determine if a bulk strengthening mechanism would further increase the strength beyond size-induced strengthening using Zn and ZnO in Cu based nanofoams with relatively densities of less than 5%. The second phase (either through internal oxidation or precipitation) showed an order of magnitude increase in strengthening effect over the solid solution form. The hardness of the foam increased by about a factor of two with the oxide particles, but showed no measurable increase in hardness between a Cu and Cu-10%Zn foam. Creating stronger low density metal supports for catalysis and filters, and for this FCC metal system second phase particles (which could in themselves be catalyst particles) appear to be an effective manner of strengthening. |