Optimum high temperature strength of two-dimensional nanocomposites
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
- Czech Technical University in Prague, Technická 2, Prague 6 (Czech Republic)
- IMDEA Materials Institute, C/Eric Kandel 2, 28906 Getafe, Madrid (Spain)
High-temperature nanoindentation was used to reveal nano-layer size effects on the hardness of two-dimensional metallic nanocomposites. We report the existence of a critical layer thickness at which strength achieves optimal thermal stability. Transmission electron microscopy and theoretical bicrystal calculations show that this optimum arises due to a transition from thermally activated glide within the layers to dislocation transmission across the layers. We demonstrate experimentally that the atomic-scale properties of the interfaces profoundly affect this critical transition. The strong implications are that interfaces can be tuned to achieve an optimum in high temperature strength in layered nanocomposite structures.
- OSTI ID:
- 22269589
- Journal Information:
- APL Materials, Vol. 1, Issue 5; Other Information: (c) 2013 Author(s); Country of input: International Atomic Energy Agency (IAEA); ISSN 2166-532X
- Country of Publication:
- United States
- Language:
- English
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