نتایج جستجو برای: alloying element

تعداد نتایج: 208341  

Journal: :Physical review letters 2012
Tyler S Matthews Carolyn Sawyer D Frank Ogletree Zuzanna Liliental-Weber Daryl C Chrzan Junqiao Wu

Metal-semiconductor eutectic liquids play a key role in both the fundamental understanding of atomic interactions and nanoscale synthesis and catalysis. At reduced sizes they exhibit properties distinct from the bulk. In this work we show an unusual effect that the formation of AuSi eutectic liquid layers is much easier for smaller thicknesses. The alloying reaction rate is enhanced by over 20 ...

Journal: :Physical review letters 2007
M S Leite G Medeiros-Ribeiro T I Kamins R Stanley Williams

The different mechanisms involved in the alloying of epitaxial nanocrystals are reported in this Letter. Intermixing during growth, surface diffusion, and intraisland diffusion were investigated by varying the growth conditions and annealing environments during chemical vapor deposition. The relative importance of each mechanism was evaluated in determining a particular composition profile for ...

Journal: :Metals 2022

AZ31 magnesium alloy sheets can be applied as 3C electronic product shells. However, exhibit obvious anisotropy, which limits their industrial application range. The composition modification of is a good choice to improve the anisotropy sheets, but effect multi-element micro-alloying on microstructure and still less investigated. For this aim, plasticity after adding Ca rare earth elements such...

2011
Petia D. Koprinkova-Hristova Nikolay Tontchev Silvia Popova

The paper presents modeling of steels strength characteristics in dependence from their alloying components quantities using neural networks as nonlinear approximation functions. Further, for optimization purpose the neural network models are used. The gradient descent algorithm based on utility function backpropagation through the models is applied. The approach is aimed at synthesis of steel ...

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