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

A nano-core-shell and prediction method technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as simulation result distortion, material gasification, and high melting pool temperature, so as to reduce size error and improve accuracy Effect

Inactive Publication Date: 2018-05-15
NANCHANG HANGKONG UNIVERSITY
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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 t

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

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[0053] The purpose of the present invention is to provide a method and system for predicting the temperature field of nano core-shell particles, so as to improve the accuracy of predicting the temperature field of nano core-shell particles.

[0054] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0055] Such as figure 1 As shown, the present invention provides a method for predicting the temperature field of nano core-shell particles. The predicting method includes the following steps:

[0056] Step 101: Establish a physical model of the molten pool according to the actual size of the molten pool;

[0057] Step 102, based on the solid model of the molten pool, establish a relationship curve between the correction coefficient and the energy density;

[0058] Step 103: Determine a cor...

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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...

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/23G06F2119/08
Inventor 郑海忠周培峰王丽
Owner NANCHANG HANGKONG UNIVERSITY
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