Method for preparing carbon-base material-copper connector used as thermonuclear reactor component under high heat flux

Abstract

Provided is a preparation of carbon-based material-copper connector used for hybrid reactor high-heat load member, belonging to high-heat load member carbon-based material and copper base alloy system integration technical field. The process comprises selecting amorphous Ti-based active solder as a connecting material at the mass percent for each component of 40 to 50% Ti, 25 to 35% Zr, 20 to 10% Cu, 15 to 5% Ni with the thickness of 20 to 30mu, inserting an interlayer between the carbon-based material and the copper for stress release, shining flatly the solder, copper block and interlayer material after machining, followed by cleaning with acetone, sintering and putting the carbon-based material into a vacuum furnace after its pending welding surface is machined and polished and soldering in vacuum in resistance radiation heating method. The method is characterized in using the high activity of the amorphous Ti-based active solder, reducing the joining temperature while improving the wetting property of solder to the carbon-based material and solving the problem of thermal stress between the carbon-based material and the copper due to mismatching of coefficient of thermal expansion.

Description

technical field [0001] The invention belongs to the technical field of system integration of carbon-based materials and copper-based alloys for high thermal load components, and in particular provides a method for preparing a carbon-based material-copper connector used as a high thermal load component of a fusion reactor. Background technique [0002] Carbon-based materials (carbon / carbon composites and doped graphite, etc.) are important candidate materials for plasma-facing components in magnetic confinement fusion reactors, and have been widely used in fusion experimental devices. In addition to its low atomic number, carbon-based materials have other excellent properties, including superior thermal shock resistance, high melting point, high thermal conductivity and good thermal fatigue performance, etc. Copper (Cu) and its alloys are metals with a low melting point but very good thermal conductivity, and are selected as heat sink materials in nuclear fusion experimental ...

AI Technical Summary

Problems solved by technology

[0005] However, since the physical and chemical properties of carbon-based materials and copper are very different, the main problems of the brazing method are: a) poor wettability and poor compatibility of the reaction interface, and it is difficult to obtain a good interface bond; b) the interface The reaction is complex, and there are many types of generated phases, which have a great impact on the performance of the joint; c) Due to the large difference in thermal expansion coefficient between carbon-based materials and copper and the inhomogeneity of the structure, there is often a large residual stress in the joint, which seriously affects the joint performance. The strength of the joint, or even cause the connection to fail

[0007] Although the remelting temperature (1083°C) and reliability of the connecting parts obtained by the active metal casting process are high, the process of this method is relatively complicated and the cost is high

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