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Method for predicting eutectic temperatures of nano Ag-Cu alloy systems in different sizes

A prediction method and technology of eutectic temperature, applied in nanotechnology, chemical property prediction, metal processing equipment, etc., can solve the problems of no nano-alloy related experimental data, etc., achieve strong reliability, ensure accuracy, and simple operation Effect

Active Publication Date: 2018-05-18
GUILIN UNIV OF ELECTRONIC TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Recently, in addition to Sopousek et al. and Dahan et al. using experiments and thermodynamic simulation methods to study Cu-Ni and Bi-Sn nanophase diagrams, respectively, Park and Lee and Garzel et al. used the Nano-CALPHAD method to optimize the Ag-Au, Ag-Cu system, the nanophase diagram of the two systems was calculated, but its optimization is mainly based on the extrapolation of the thermodynamic properties of the corresponding nano-particles, and there is no relevant experimental data for nano-alloys; Guisbiers et al. The nano-phase diagram of the polyhedral Au-Cu system and the nano-phase diagram of the Ag-Co system with different scales and shapes of 2-10nm, but there is no relevant nano-alloy experimental data support

Method used

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Embodiment 1

[0038] The concrete operating steps of the eutectic temperature experiment measuring method of nanometer Ag8Cu2 alloy of the present invention are as follows:

[0039] Step (1), configure AgNO of 0.01mol / L 3 solution and 0.01mol / L CuSO 4Solution, the prepared solution is mixed according to the proportion of Ag8Cu2 ions, so that 50ml solution is obtained.

[0040] In step (2), the above solution is diluted to 97ml with deionized water, and 3ml of sodium citrate with a mass fraction of 1% is added dropwise.

[0041] In step (3), the prepared solution was stirred and heated to boiling under an argon protective atmosphere, put into water to cool to room temperature, poured 3ml of NaBH4 with a concentration of 1mmol / L at one time, and stirred rapidly until the color was uniform.

[0042] Step (4), leave the solution for one hour, add 0.1 ml of 3-aminopropanetrihydrosilane with a concentration of 1 mmol / L, stir evenly, and leave it for another 15 minutes.

[0043] Step (5), stir ...

Embodiment 2

[0050] The concrete operating steps of the eutectic temperature CALPHAD prediction method of nanometer Ag7Cu3 alloy of the present invention are as follows:

[0051] Step (1), configure AgNO of 0.01mol / L 3 solution and 0.01mol / L CuSO 4 Solution, the prepared solution is mixed according to the ratio of Ag7Cu3 ions, so that 50ml solution is obtained.

[0052] In step (2), the above solution is diluted to 97ml with deionized water, and 3ml of sodium citrate with a mass fraction of 1% is added dropwise.

[0053] In step (3), the prepared solution was stirred and heated to boiling under an argon protective atmosphere, put into water to cool to room temperature, poured 3ml of NaBH4 with a concentration of 1mmol / L at one time, and stirred rapidly until the color was uniform.

[0054] Step (4), leave the solution for one hour, add 0.1 ml of 3-aminopropanetrihydrosilane with a concentration of 1 mmol / L, stir evenly, and leave it for another 15 minutes.

[0055] Step (5), stir slowly...

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Abstract

The invention relates to a method for predicting eutectic temperatures of nano Ag-Cu alloy systems in different sizes. The method includes: preparing Ag-Cu nano alloy particles according to a wet chemical method, coating with SiO2, subjecting the nano alloy particles to representation through TEM, and adopting a DSC (differential scanning calorimeter) for acquiring nano alloy size and melting information. By consideration of related nano particle surface effects, a relationship of corresponding nano particle gibbs free energy changing along with temperature and particle size is extrapolated onblock alloy gibbs free energy according to a CALPHAD method, a correction factor is adjusted according to experimental results, and accordingly a self-consistent related nano particle gibbs free energy describing expression is acquired and used for predicting Ag-Cu nano alloy eutectic temperature, and uniformity of calculative prediction results and experimental results is achieved.

Description

technical field [0001] The invention relates to a method for predicting the eutectic temperature of nano Ag-Cu alloy systems with different sizes. Background technique [0002] Because the thermodynamic properties of nanomaterials change with particle size and shape, the thermodynamic parameters describing nanomaterials will be functions of particle size and shape in addition to temperature, composition, and pressure. In order to extend the thermodynamic calculation CALPHAD method to the nanomaterial system, it can be accurately used in the calculation and prediction of the phase diagram and thermodynamic properties of the nanomaterial system. Based on the analysis of the influence of nanoparticle surface (interface) effects on the chemical potential of nanoparticles, the CALPHAD method is extrapolated to calculate the phase diagram and thermodynamic properties of nanosystems, and is called the Nano-CALPHAD method. At the same time, although the relationship between the pha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00G01N25/20B22F1/02B22F9/24B82Y40/00
CPCG16C20/30G01N25/20B82Y40/00B22F9/24B22F1/054B22F1/16
Inventor 唐成颖苏婷王许通田庄贺超肖皓霖
Owner GUILIN UNIV OF ELECTRONIC TECH
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