A method for efficiently preparing ternary diffusion couples

A diffusion couple, high-efficiency technology, applied in the field of thermodynamics research, can solve problems such as holes in the node position, and achieve the effect of not easy to generate voids, tight bonding, and high success rate

Active Publication Date: 2020-12-11
YUNNAN PRECIOUS METALS LAB CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to overcome the problems existing in the prior art, the present invention provides a method for efficiently preparing a ternary diffusion couple. Voids are prone to appear at the position of the diffusion couple node

Method used

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  • A method for efficiently preparing ternary diffusion couples
  • A method for efficiently preparing ternary diffusion couples
  • A method for efficiently preparing ternary diffusion couples

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Example 1: First, the electrolytic copper block with a purity of 99.95% and the silver block with a purity of 99.9% are cut into small pieces of 5 × 10 × 10 mm by wire cutting, and the copper block and silver block are cut by the method of grinding metallography. The surface to be diffused of the block is ground and polished to a mirror surface, cleaned with alcohol, and then fixed with a clamp 9, such as image 3 As shown, the quartz tube is put into vacuum and sealed, and after heat treatment, a "Japanese-shaped" binary diffusion couple is made; after the quartz tube is cooled, the binary diffusion couple is taken out, and the four surfaces to be diffused are ground and polished Polish to the mirror surface, clean it with alcohol, bind it with molybdenum wire, and fill the mold with block pure aluminum so that the height of the block pure aluminum is 3cm higher than the highest point of the binary diffusion couple, and cover the crucible cover, and then put it into a ...

Embodiment 2

[0030]Embodiment 2: Firstly, a nickel block with a purity of 99.9% and a titanium block with a purity of 99.9% are cut into small pieces of 5×10×10 mm by a wire cutting method, and the surface to be diffused of the nickel block and the titanium block is ground by a metallographic grinding method Flatten and polish to the mirror surface, clean it with alcohol, then fix it with a fixture, put it into a quartz tube and vacuumize it, seal it, and make a "Japanese-shaped" binary diffusion couple after heat treatment; after the quartz tube cools down, take out the binary diffusion couple Even, the four surfaces to be diffused are ground and polished to the mirror surface, cleaned with alcohol, bound with molybdenum wire, and filled with block pure copper in the mold, so that the height of the block pure copper can reach the highest At the position of 3cm from the highest point of the binary diffusion couple, cover the crucible lid, and then put it into a box-type muffle furnace. The ...

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Abstract

The invention discloses a method for efficiently preparing a ternary diffusion couple. The method comprises the following steps of firstly preparing a binary diffusion couple of a component A and a component B by a clamp method, then placing the prepared binary diffusion couple into a mold, adding a block-shaped component C to be diffused, covering with a graphite crucible cover, placing the graphite crucible cover into a muffle furnace, heating the graphite crucible cover to a temperature above the melting point of the component C to melt the component C, cooling the component C to a heat treatment temperature, keeping the temperature, and performing water quenching to obtain the ternary diffusion couple. The ternary diffusion couple is prepared by utilizing the contraction force when metal solidifies, and diffusion couple interfaces prepared by the method are tightly combined, so that the problem of high probability of holes at node positions of the diffusion couple when the ternarydiffusion couple is prepared is solved. The method is simple in preparation process, gaps are not easily generated between the interfaces, and the success rate of preparing the diffusion couple is high. The method is suitable for the preparation of diffusion couples of metal materials, and the prepared diffusion couples can be used for the study of phase diagrams, diffusion kinetics and thermodynamics.

Description

technical field [0001] The invention relates to the field of thermodynamics research, in particular to a method for efficiently preparing a ternary diffusion couple, and the method is mainly used for research in the fields of phase diagram, diffusion thermodynamics and kinetics. Background technique [0002] Diffusion couples first appeared in the research of materials and metallurgy science. Generally, a diffusion couple refers to a sample in which two materials are metallurgically bonded together after diffusion, and diffuse in a direction perpendicular to the metallurgical bonding surface, forming a continuous transition from material 1 to material 2 with a certain thickness, the transition layer The thickness can meet the needs of determining the composition distribution with an electron probe. Although this transition layer or phase interface is a two-dimensional surface macroscopically, it is generally considered that both sides of the interface are in a state of loca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D19/00C23C10/22G01N1/28
CPCB22D19/00C23C10/22G01N1/28
Inventor 毕亚男吴先月陈松谢明
Owner YUNNAN PRECIOUS METALS LAB CO LTD
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