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Multi-component alloy diffusion couple device and multi-component alloy diffusion coefficient determination experiment method

A multi-element alloy and diffusion coefficient technology, applied in the field of experimental measurement of diffusion coefficient, can solve the problems of the difficulty of ensuring the neutrality of diffusion couples, the influence of diffusion coefficient measurement, and the error of measurement results. The effect of high device utilization

Active Publication Date: 2021-03-26
SHANGHAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this measurement technology has the following disadvantages: a large molten pool will generate large convection, and the convection in the molten pool will extend to the capillary to a certain extent, which will cause large errors in the final measurement results
This method also has some problems, such as the complexity of the experimental device and high requirements for operation. In addition, when using this method to measure the interdiffusion coefficient, at the beginning and end stages of diffusion, the rotation to stir the liquid metal will easily cause melt convection, which will affect the subsequent diffusion coefficient. The measurement has an influence; the neutrality of the diffusion couple is difficult to guarantee

Method used

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  • Multi-component alloy diffusion couple device and multi-component alloy diffusion coefficient determination experiment method
  • Multi-component alloy diffusion couple device and multi-component alloy diffusion coefficient determination experiment method
  • Multi-component alloy diffusion couple device and multi-component alloy diffusion coefficient determination experiment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] In this example, see figure 1 , a multi-component alloy diffusion couple device, including a first refractory material 3, a second refractory material 5, a third refractory material 7 and a weight module 2, the first refractory material 3, the second refractory material 5 and the third refractory material All materials 7 have blind holes;

[0044] The first refractory material 3 with a blind hole is used to accommodate the first metal solid material 4 for preparing the diffusion couple, assembled into an upper assembly, and the first metal solid material 4 exposed from the blind hole of the first refractory material 3 The end portion forms the lower interface of the first refractory material 3; the second refractory material 5 is provided with a stepped blind hole, and the stepped blind hole is composed of an upper reaming part and a lower receiving hole part, and the lower receiving hole part of the second refractory material 5 is used for The lower part of the third ...

Embodiment 2

[0049] This embodiment is basically the same as Embodiment 1, especially in that:

[0050] In this example, see figure 1 , the inner diameter of the quartz tube 1 is 5-50mm, and the height is 100-200mm;

[0051] The height of the counterweight module 2 is 30-50mm, and the diameter is 5-50mm; the material of the counterweight module 2 is stainless steel or other high melting point metal materials;

[0052] The height of the first refractory material 3 is 10-50 mm, the diameter is 5-50 mm, the height of the blind hole punched is at least 5 mm and not greater than 50 mm, and the diameter of the blind hole is 0.5-2 mm; in the center of the first refractory material 3 Blind holes are punched at the shaft position;

[0053] The height of the third refractory material 7 is 10-50mm, the diameter is 2-40mm, the height of the blind hole punched is at least 5mm and not greater than 50mm, and the diameter is 0.5-2mm; at the position of the central axis of the third refractory material 7...

Embodiment 3

[0059] This embodiment is basically the same as the previous embodiment, and the special features are:

[0060] In this example, see figure 1 Put the blind hole of the third refractory material 7 with the blind hole up into the blind hole of the second refractory material 5 to assemble the refractory material, so as to ensure the connection between the lower end of the third refractory material 7 and the second refractory material 5 The bottom of the blind hole is close, and the upper end of the third refractory material 7 is flush with the upper end surface of the upper reaming part of the second refractory material 5 .

[0061] The structure of each part of the device structure in this embodiment is appropriate. The upper end of the third refractory material 7 is flush with the upper end surface of the upper reaming part of the second refractory material 5, so that the edge end surfaces of the blind holes of each refractory material can be fully contacted. There will be no ...

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Abstract

The invention discloses a multi-component alloy diffusion couple device and a multi-component alloy diffusion coefficient determination experiment method, a diffusion couple comprises a counterweightmodule and three cylindrical refractory materials with blind holes, and the blind holes are all located in the centers of the refractory materials. The blind hole of the refractory material at the upper end is used for accommodating a solid material I for preparing the diffusion couple; wherein the blind hole with larger diameter at the upper end in the refractory material at the lower end is usedfor collecting redundant melt after the interface of the solid material I and the solid material II is attached, the blind hole with smaller diameter at the lower end accommodates the refractory material with smaller diameter and blind hole, the refractory material accommodates the solid material II, and the solid material I is in contact with the solid material II. The three refractory materialsare sequentially filled into a quartz tube for vacuum sample sealing treatment, so that the oxidation pollution of the sample is reduced. According to the device and the method, the thermal diffusionand interface reaction conditions of the melt interface under the vacuum condition can be obtained, the process cost is low, the operation is simple, and the stability is good.

Description

technical field [0001] The invention relates to an experimental device for testing and analyzing the diffusion behavior of metal materials and an experimental method thereof, in particular to a diffusion couple and a preparation method thereof, which are applied in the technical field of experimentally measuring diffusion coefficients. Background technique [0002] The diffusion behavior of metal melt plays an important role in the solidification process of the melt, and is a key kinetic parameter affecting the crystal nucleation and growth process. The study of liquid metal diffusion is of great significance in many fields such as material science, metallurgical chemistry and fluid physics. In the research of some alloy systems, it is also found that changing the diffusion coefficient of the melt can directly change the composition distribution and microscopic morphology of the solidified structure. Therefore, it is very important to accurately determine the diffusion coeff...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28G01N13/00
CPCG01N1/28G01N13/00G01N2013/003
Inventor 钟云波刘颖郭祥辉林文浩周邦飞郑天祥沈喆郭逸丰丁彪
Owner SHANGHAI UNIV
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