Physics – Condensed Matter – Materials Science
Scientific paper
2007-12-13
Physical Review B 79, 094110 (2009)
Physics
Condensed Matter
Materials Science
8 pages, 15 figures
Scientific paper
10.1103/PhysRevB.79.094110
We use phase field simulations to study composites made of two different ferroelastics (e.g., two types of martensite). The deformation of one material due to a phase transformation can elastically affect the other constituent and induce it to transform as well. We show that the phase transformation can then occur above its normal critical temperature and even higher above this temperature in nanocomposites than in bulk composites. Microstructures depend on temperature, on the thickness of the layers, and on the crystal structure of the two constituents -- certain nanocomposites exhibit a great diversity of microstructures not found in bulk composites. Also, the periodicity of the martensite twins may vary over 1 order of magnitude based on geometry. keywords: Ginzburg-Landau, martensitic transformation, multi-ferroics, nanostructure, shape-memory alloy
Ahluwalia Rajeev
Bouville Mathieu
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