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Self-locking crucible for diffusion couple in-situ detection and preparation method and application thereof

An in-situ detection and diffusion couple technology, applied in crucibles, measuring devices, fluorescence/phosphorescence, etc., can solve problems such as reducing detection accuracy, increasing the difficulty of sample preparation and processing of diffusion couples, and inability to obtain information on the initial kinetic state of compounds. , to avoid sample contamination, improve experimental efficiency and measurement accuracy

Active Publication Date: 2021-06-22
NEW MATERIAL INST OF SHANDONG ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Accordingly, the limitations of the traditional material analysis and detection methods on the diffusion couple mainly include: 1. The diffusion couple needs to be pre-diffused and heat-treated before the experimental detection. The purpose is to form a certain diffusion layer for subsequent observation, but it will lead to the inability to obtain compounds 2. The shape of the diffusion couple is required to be regular and the volume is small (about 8×5×3mm cuboid), otherwise the tantalum fixture is difficult to tighten the sample, so that the compound cannot be generated, which increases the diffusion couple sample. Difficulty in preparation and processing; 3. The pre-diffusion process needs to be vacuum-sealed in the quartz tube to prevent oxidation, resulting in the need for multiple processing steps before the sample is taken out for observation, reducing the detection accuracy

Method used

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  • Self-locking crucible for diffusion couple in-situ detection and preparation method and application thereof
  • Self-locking crucible for diffusion couple in-situ detection and preparation method and application thereof
  • Self-locking crucible for diffusion couple in-situ detection and preparation method and application thereof

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preparation example Construction

[0041] In the preparation of the self-locking crucible for in-situ detection of the diffusion couple, the size is small and the wall thickness accuracy is high, and the raw material is a refractory hard metal, so it is difficult to use traditional machining (stamping) to prepare. The powder metallurgy method can prepare materials such as refractory metals; the powder metallurgy process does not melt the material during the material production process, and will not mix impurities brought by other substances, and the sintering is carried out in a vacuum and reducing atmosphere. It will not be oxidized and will not have any contaminating materials, so the purity of the product is relatively high. The powder metallurgy method can ensure the correctness and uniformity of the material composition in the ratio; the loss of metal produced by this method is only 1-5%, while the general processing will consume 80% of the metal. The method of powder metallurgy can produce high-purity mat...

Embodiment 1

[0056] In the Mg-Al-Zn alloy system, the method for detecting the φ phase diffusion behavior of the ternary intermetallic compound comprises the following steps:

[0057] 1. Design and preparation of the crucible: design the crucible as figure 1 As shown, the diameter of the crucible is 10 mm, and the height is 4 mm. There is no need to consider the cutting shape of the Mg-Al-Zn alloy, but a sufficiently flat diffusion contact surface must be reserved. Considering that the measured temperature of the Mg-Al-Zn alloy is 360°C, and the tantalum fixture does not react with the Mg-Al-Zn alloy, tantalum with a purity of 99.99% is selected as a raw material. The shape of the tantalum powder in the raw material is irregular, and the particle size is 1000-6000 mesh. The pure tantalum was ball milled and mixed for 6 hours, the ball milled tantalum powder was sieved and dried, then compressed and sintered at 3500°C, heat treated for 5 hours, quenched in hot oil and tempered at 200°C for...

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Abstract

The invention belongs to the technical field of detection of diffusion growth of intermetallic compounds, and particularly relates to a self-locking crucible for diffusion couple in-situ detection and a preparation method and application thereof. The crucible comprises a circular crucible body, a first inner side plate and a second inner side plate, a holes is formed in the wall of the circular crucible body; the first inner side plate is positioned in the circular crucible body, is movably connected with the crucible wall and can move around the inner wall of the crucible; a hole is formed in the second inner side plate, the crucible hole is communicated with the hole of the second inner side plate, and the second inner side plate is connected with the circular crucible body at the hole through a screw, so that a self-locking function is realized. When the self-locking crucible is used for diffusion couple in-situ observation, diffusion couple preparation and in-situ observation can be achieved in one step, complex operation steps such as pre-diffusion heat treatment and vacuum tube sealing are omitted, and the experiment efficiency and the measurement precision are improved.

Description

technical field [0001] The invention belongs to the technical field of detection of diffusion growth of intermetallic compounds, and in particular relates to a self-locking crucible for in-situ detection of diffusion couples, a preparation method and application thereof. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] The rapid development of transportation, electronic communication, aerospace and other fields has put forward higher requirements on the performance of traditional metal structural materials. The kinetic behavior of the second-phase intermetallic compounds in metal structural materials is the key factor affecting the performance, so quantitatively controllin...

Claims

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Application Information

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IPC IPC(8): B01L3/04B22F5/00G01N21/64G01N21/84
CPCB01L3/04B22F5/00G01N21/6402G01N21/6458G01N21/84G01N2021/8411Y02E30/30
Inventor 程开明郑彦周吉学詹成伟孙佳星王瑨刘运腾修大鹏王西涛唐守秋
Owner NEW MATERIAL INST OF SHANDONG ACADEMY OF SCI
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