Prediction method and system for temperature field of nanometer core-shell particles

Abstract

The invention discloses a prediction method and system for the temperature field of nanometer core-shell particles. The method includes the steps that firstly, an entity model of a molten pool is established according to the actual size of the molten pool; a relation curve of the correction coefficient and the energy density is established based on the entity model of the molten pool; then, a correction coefficient corresponding to a laser with a given energy density is determined according to the relation curve of the correction coefficient and the energy density; a heat source model of the laser with the given energy density is corrected with the correction coefficient, and a corrected heat source model is obtained; finally, a heat source is applied to the entity model according to the corrected heat source model, and the temperature field of the nanometer core-shell particles is obtained. Thus, the precision of temperature field prediction of the nanometer core-shell particles is improved.

Description

technical field [0001] The invention relates to the field of temperature field simulation, in particular to a method and system for predicting the temperature field of nano core-shell particles. Background technique [0002] Thermal barrier coatings (TBC) are widely used in the protection of high-temperature components such as aerospace, metallurgy, and chemical industries because of their superior properties such as heat insulation, corrosion resistance, and thermal shock resistance. Aiming at the problem of cracks in the YSZ thermal barrier coating and its poor combination with the substrate, laser cladding of nano YSZ@Ni core-shell particles is an effective way to solve this problem. The laser cladding process is rapidly cooled and heated and accompanied by complex phase changes. The quality of the coating is closely related to the melting behavior during the cladding process, and the change of the temperature field directly affects the microscopic solidification structur...

AI Technical Summary

Problems solved by technology

However, the thermal conductivity of YSZ in YSZ@Ni nano-core-shell particles is small, which will cause high energy concentration during the laser cladding process, excessive temperature of the molten pool, material gasification, and severe burning.

In the simulation of the laser cladding temperature field, it is assumed that there is no gasification and burning of the material, which will distort the simulation results of the temperature field of the laser cladding YSZ@Ni, and cannot realize the accurate temperature field of the YSZ@Ni nano core-shell particles. simulation

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