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- W2186609715 abstract "Metal-ceramic nanolaminates are two-dimensional nanocomposites made up by alternating metallic and ceramic layers with a thickness in the range 2 nm to 100 nm. They are manufactured by physical vapor deposition in the form of coating with thicknesses up to several µm and present a combination of mechanical and functional properties that a very appealing for many engineering applications. From the mechanical viewpoint, metal-ceramic nanolaminates show a dramatic increase in strength as compared to standard metal-ceramic nanocomposites. This is due as a result of strengthening of the ceramic and metallic nanolayers because of the limited flaw size in the former, the constraint induced by the ceramic on the plastic deformation of the metallic layer and the enhancement of the metal yield stress due to size effects [1-3]. Moreover, it has been recently reported an increase in both strength and toughness with decreasing layer thickness [4]. This contribution is focused in the analysis of the deformation and failure mechanisms of a model Al/SiC metal-ceramic nanolaminate by means of a combination of nanomechanical experiments and simulations. In particular, instrumented nanoindentation and micropillar compression tests were carried out in different orientations as a function of strain rate and temperature (25oC to 400oC) and compared with numerical simulations in which the nanolayered structure was explicitly taken into account. As a result, the role played by the plastic deformation of the matrix, the constraint imposed by the ceramic layers and the metalceramic interfaces on the deformation and fracture of the nanolaminates was elucidated as a function of the volume fraction and layer thickness of each constituent for different strain rates and temperatures. This information is critical for the design of novel metal-ceramic nanolaminates with enhanced mechanical properties under different regimes [5]. References" @default.
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- W2186609715 date "2013-01-01" @default.
- W2186609715 modified "2023-09-27" @default.
- W2186609715 title "Metal-ceramic nanolaminates: a new paradigm in metal-ceramic composites" @default.
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