Metal melt diffusion device

A metal melt and equipment technology, applied in the field of metal melt diffusion equipment, can solve problems such as large differences, and achieve the effects of removing systematic errors, accurate and reasonable diffusion coefficient measurement, and reducing residual temperature diffusion time.

Active Publication Date: 2013-09-18
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, the diffusion coefficient of the same system measured by different methods is often very different, and some differences even exceed 1 times.

Method used

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  • Metal melt diffusion device
  • Metal melt diffusion device
  • Metal melt diffusion device

Examples

Experimental program
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Embodiment Construction

[0028] The structural form of the molten metal diffusion equipment in this embodiment is:

[0029] see figure 1 , figure 2 , a frame 2 is set in the vacuum chamber 1, and a diffusion table made of graphite is fixedly arranged in the frame 2; the diffusion table is a vertically fixed columnar body; a heating device 3 is arranged on the periphery of the diffusion table; The platform is a component, including:

[0030] Such as figure 2 , Figure 3a and Figure 3b As shown, a fixed base 4 is set, and a fixed sample column 5 is arranged in the center of the fixed base 4 along the axial direction. The top surface of the base 4 is flush, and fixed splints 6 are respectively arranged on both sides of the diffusion table; the fixed base 4, the fixed sample column 5, the sliding block 7 and the fixed top plate 8 are clamped front and rear by the fixed splints 6; A slot for positioning the heating device 3 is provided on the top for heating, and a small hole leading to the fixed ...

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Abstract

The invention discloses a metal melt diffusion device which is characterized in that a framework is arranged in a vacuum chamber body; a diffusion platform made of graphite is fixedly arranged in the framework; the diffusion platform is a vertically fixed cylinder-shaped body; a heating device is arranged at the periphery of the diffusion platform; the diffusion platform is a component comprising a fixed base, a sliding block and a top plate; a vacuumizing port and a cooling gas lead-in port are respectively arranged in the side wall of the vacuum chamber body; and cooling gas can be led into the cooling gas lead-in port. In the metal melt diffusion device, molten metal is sheared in a sample cylinder chamber by two different work stations between the sliding block and the fixed base, oxide skin generated by slight oxidation of the surface of a material is removed by shearing, system error having diffusion phenomenon in the temperature rise process is removed at the same time, the diffusion time of residual temperature is greatly reduced in the temperature reduction process, and subsequent diffusion coefficient measurement on a diffusion sample is accurate and reasonable.

Description

technical field [0001] The invention relates to a metal melt diffusion device, which is suitable for measuring the interdiffusion coefficient of binary or multi-element alloys or other non-metallic materials in molten state. Background technique [0002] A lot of research has been done on the liquid diffusion at room temperature, such as the diffusion of copper sulfate solution in water. However, due to the limitation of technical conditions, there is no better diffusion equipment for high-temperature molten metal alloy melts so far. [0003] 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. In the research of some alloy systems, it is found that changing the diffusion coefficient of the melt can directly change the composition distribution and microscopic morphology of the solidified structure. Therefore, the diffusion coefficient of the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N13/00G01N1/38
Inventor 张博耿永亮朱纯傲
Owner HEFEI UNIV OF TECH
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