Papers by Keyword: Interface Mobility

Abstract: This study leverages artificial intelligence (AI) to advance materials science, focusing on microstructural evolution in binary alloys during spinodal decomposition. Following the formulation of Zhu et al., we explore the microstructure evolution during interface-controlled spinodal decomposition. A comprehensive dataset captures the dynamic microstructural changes, highlighting the model's efficiency in analyzing complex data. The innovative use of an Autoencoder- ConvLSTM model enables precise, low-error microstructural transformation predictions, demonstrating AI’s potential in materials science research. This work provides a deeper understanding of material behaviors and offers new research directions.

Abstract: The formation of metal (Ni and Pd) silicide thin films on a Si wafer is analyzed using differential scanning calorimetry (DSC) and isothermal X ray diffraction measurements. The sensitivity of DSC is remarkable even in this experimental Ni/Si and Pd/Si(001) and allows to show two steps of growth for a phase formation (lateral and normal growth). This technique is shown being of main interest for characterization of silicide formation during microelectronic industrial processes. Combining X-ray diffraction measurements and DSC measurements, the interface mobilities and the effective diffusion coefficient characterizing Ni₂Si and Pd₂Si growth are measured. These quantities as well as the interface mobilility for lateral growth have been determined by using a model taken into account the nucleation and lateral growth as well as a normal growth controlled by diffusion and interface reaction.

Abstract: Recent studies indicate that the austenite(γ)-to-ferrite(α) transformation kinetics in low alloyed steels is solely controlled by the intrinsic mobility of the interface at least in the initial stages of ferrite growth. Then, diffusion processes in the interface significantly retard ferrite growth, so that bulk diffusion of the fast diffusing interstitial component carbon becomes relevant. Two series of dilatometer tests, one from a low to ultra-low carbon steel [1] (alloy A) and the other from an Fe-Mn steel [2] (alloy B), are considered. In case of alloy A the first stage of the transformation kinetics is apparently controlled by the intrinsic interface mobility, whereas in the second stage carbon diffusion in the interface and in the bulk material comes into play. The transition region can be modeled by an effective mobility, which depends on the interface velocity. In the second stage the interface mobility depends on the temperature only. In case of alloy B a hierarchical model allows for a direct estimation of the intrinsic mobility. The numerical results indicate that the interface mobility also changes from an intrinsic mobility at the initial stage of the transformation to an effective mobility due to solute drag during the transformation process.