Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7989985 | Journal of Alloys and Compounds | 2018 | 22 Pages |
Abstract
We prepared Sn nanoparticle-embedded Mg1.96Al0.04Si0.97Bi0.03 nanocomposites and measured their thermoelectric properties and fracture toughness to elucidate the trade-off relationship between thermoelectric and mechanical properties. When Sn nanoparticles (50-150â¯nm) were introduced at the grain boundaries of the thermoelectric Mg1.96Al0.04Si0.97Bi0.03 matrix, the fracture toughness improved because of the inhibition of crack propagation. However, the power factor deteriorated due to the decrease in carrier mobility. We found that interface (between thermoelectric matrix and nanoparticles) density is a critical factor to determine the mechanical properties as well as thermoelectric transport properties. Optimized values of figure of merit (â¼0.66 @ 873â¯K) and fracture toughness (1.10â¯MPaâ¯m1/2) were obtained for 0.9â¯vol % Sn nanoparticle-embedded Mg1.96Al0.04Si0.97Bi0.03 nanocomposite.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Gwansik Kim, Hwijong Lee, Hyun Jun Rim, Jeongmin Kim, Kwanlae Kim, Jong Wook Roh, Soon-Mok Choi, Byung-Wook Kim, Kyu Hyoung Lee, Wooyoung Lee,