A preparation method of nano-oxide dispersion strengthened copper alloy for fusion reactor

A dispersion-strengthened copper and nano-oxide technology, applied in fusion reactors, thermonuclear fusion reactors, metal processing equipment, etc., can solve problems such as poor creep performance, uneven spatial distribution, and easy segregation, and achieve high temperature strength and Improvement of creep resistance, inhibition of oxide growth and agglomeration, and improvement of neutron radiation resistance

Active Publication Date: 2022-06-28
LANZHOU UNIVERSITY OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] However, for the application scenario of fusion reactor divertor heat sink materials, commercial alumina dispersion strengthened copper still has the following disadvantages in terms of microstructure and performance: (1) The oxide deposits have a large distribution range, easy to segregate, irregular shape, space Uneven distribution; (2) Low high-temperature strength and poor creep performance; (3) The addition of neutron absorber boron in low free oxygen application scenarios cannot fully meet the requirements of heat sink materials for future fusion reactor divertor components. needs to be further improved

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  • A preparation method of nano-oxide dispersion strengthened copper alloy for fusion reactor
  • A preparation method of nano-oxide dispersion strengthened copper alloy for fusion reactor
  • A preparation method of nano-oxide dispersion strengthened copper alloy for fusion reactor

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Embodiment 1

[0037] This embodiment provides a method for preparing a nano-oxide dispersion-strengthened copper alloy for a fusion reactor, comprising the following steps:

[0038] Step (1), using electrolytic copper, pure aluminum, and copper-titanium intermediate alloy as raw materials, adopting vacuum air atomization powder making equipment to smelt and atomize powder with argon gas to obtain alloy powder; before pulverizing, vacuum the equipment to 100Pa Next, inject high-purity argon gas, and use magnesia crucible for smelting. After smelting, ensure that the mass percentage of aluminum in the alloy is 0.18%, and the mass ratio of titanium to aluminum is 1:2;

[0039] Step (2), sieving the obtained powder to obtain an alloy powder with a particle size less than 325 meshes;

[0040] In step (3), cuprous oxide, nano-alumina, and nano-titanium oxide are mixed in proportion (the proportions of the three elements of copper, aluminum, and titanium are the same as those in step (1)), and mec...

Embodiment 2

[0050] This embodiment provides a method for preparing a nano-oxide dispersion-strengthened copper alloy for a fusion reactor, comprising the following steps:

[0051] Step (1), using electrolytic copper, pure aluminum, and pure titanium as raw materials, adopt vacuum air atomization pulverizing equipment to smelt and use argon gas atomization to pulverize to obtain alloy powder; before pulverizing, vacuum the equipment to below 100Pa, Then high-purity argon gas is injected, and alumina crucible is used for smelting. After smelting, ensure that the mass percentage of aluminum in the alloy is 0.35%, and the mass ratio of titanium to aluminum is 1:1;

[0052] Step (2), sieving the obtained powder to obtain an alloy powder with a particle size less than 325 meshes;

[0053]In step (3), cuprous oxide, nano-alumina, and nano-titanium oxide are mixed in proportion (the proportions of the three elements of copper, aluminum, and titanium are consistent with those in step (1)), and mec...

Embodiment 3

[0064] This embodiment provides a method for preparing a nano-oxide dispersion-strengthened copper alloy for a fusion reactor, comprising the following steps:

[0065] Step (1), using electrolytic copper, pure aluminum, and copper-titanium intermediate alloy as raw materials, adopting vacuum air atomization powder making equipment to smelt and atomize powder with argon gas to obtain alloy powder; before pulverizing, vacuum the equipment to 100Pa Next, inject high-purity argon gas, and use magnesia crucible for smelting. After smelting, ensure that the mass percentage of aluminum in the alloy is 0.1%, and the mass ratio of titanium to aluminum is 1:1.5;

[0066] Step (2), sieving the obtained powder to obtain an alloy powder with a particle size less than 325 meshes;

[0067] In step (3), cuprous oxide, nano-alumina, and nano-titanium oxide are mixed in proportion (the proportions of the three elements of copper, aluminum, and titanium are the same as those in step (1)), and me...

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Abstract

The invention discloses a method for preparing a nano-oxide dispersion-strengthened copper alloy for a fusion reactor, which comprises the following steps: (1), using electrolytic copper, pure aluminum, pure titanium or a copper-titanium intermediate alloy as raw materials, and adopting vacuum atomization Obtain alloy powder; (2) Prepare oxygen source by mechanical alloying method; (3) Mix alloy powder and oxygen source evenly to obtain mixed powder; (4) Perform high-temperature internal oxidation treatment on mixed powder, and then perform hydrogen gas Reduction treatment; (5), press the reduced powder into a green body of the required shape by cold isostatic pressing; (6), reduce the obtained green body again with hydrogen; (7), make the green body after the second reduction The blank is subjected to vacuum high-temperature degassing treatment; (8), high-temperature consolidation treatment. The invention solves the problems of oxide size, shape and spatial distribution obtained in the prior art, the problems of insufficient high-temperature strength and creep performance, and the problem of neutron absorption caused by boron addition.

Description

technical field [0001] The invention belongs to the technical field of copper alloy preparation, and particularly relates to a preparation method of a nano-oxide dispersion-strengthened copper alloy for fusion reactors. Background technique [0002] In the future, the divertor components of fusion reactors will be in harsh service environments with synergistic effects of extremely high heat load, high dose neutron irradiation, plasma irradiation, hydrogen isotopes, and high temperature stress. Therefore, heat sink materials are required to have high strength, high toughness, and high heat. Conductivity, high heat resistance, resistance to radiation damage and low hydrogen isotope retention. Considering the above requirements and material availability, copper-based materials are a compromise choice, and oxide dispersion strengthening is the most promising heat sink copper material strengthening strategy that can balance the above requirements at the same time. In order to me...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/05B22F1/142B22F1/145B22F3/04B22F3/15B22F3/20B22F9/04B22F9/08B22F9/22C22C9/01C22C32/00G21B1/13G21B1/11
CPCC22C1/05B22F9/082B22F9/04B22F9/22B22F3/04B22F3/20B22F3/15C22C9/01C22C32/0021G21B1/13G21B1/11B22F2009/041B22F2003/208Y02E30/10
Inventor 赵四祥张廷晓
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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