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Method for improving high-temperature oxidation resistance of AgCu alloy by using three-dimensional network reinforced phase

A technology of high temperature oxidation resistance and three-dimensional network, which is applied in the field of improving the high temperature oxidation resistance of AgCu alloys, and can solve the problems of poor high temperature oxidation resistance of silver-copper-based solders, etc.

Active Publication Date: 2021-09-24
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem of poor high-temperature oxidation resistance of the existing silver-copper-based solder, the present invention proposes a method for improving the high-temperature oxidation resistance of AgCu alloys by using a three-dimensional network reinforcement phase

Method used

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  • Method for improving high-temperature oxidation resistance of AgCu alloy by using three-dimensional network reinforced phase
  • Method for improving high-temperature oxidation resistance of AgCu alloy by using three-dimensional network reinforced phase
  • Method for improving high-temperature oxidation resistance of AgCu alloy by using three-dimensional network reinforced phase

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specific Embodiment approach 1

[0029] Specific implementation mode 1: In this implementation mode, the method for improving the high temperature oxidation resistance of AgCu alloy by using the three-dimensional network reinforcement phase is carried out according to the following steps:

[0030] 1. Using the ice template method to prepare the density of 7 ~ 15mg / cm 3 graphene sponge;

[0031] 2. Preparation and molding of AgCuTi solder paste: Mix AgCuTi powder and binder evenly to obtain AgCuTi solder paste, mold the AgCuTi solder paste through a mold to obtain sheet-like solid AgCuTi solder paste;

[0032] 3. Assembly of the test piece to be infiltrated: the graphene sponge is placed between two pieces of solid AgCuTi solder paste to obtain the test piece to be infiltrated. The graphite paper in the solid AgCuTi solder paste is located on the upper surface of the test piece to be infiltrated and Lower surface; the surface size of each solid-state AgCuTi solder paste and graphene sponge is identical; the m...

specific Embodiment approach 2

[0040] Specific embodiment two: what this embodiment is different from specific embodiment one is: adopt the ice template method described in step one to prepare the method for graphene sponge to carry out as follows:

[0041] 1) Disperse the graphene oxide powder in deionized water, and ultrasonically treat it at 100KHz for 0.5-1h to obtain a graphene oxide dispersion with a concentration of 2mol / L;

[0042] 2) Put the graphene oxide dispersion into a plastic container and freeze it at -20 to -40°C for 1h to 2h to obtain a mixture of graphene oxide and ice;

[0043] The graphene oxide dispersion liquid is frozen into ice to obtain a mixture of graphene oxide and ice, and the graphene oxide is distributed in a three-dimensional network at ice grain boundaries.

[0044] 3) Put the mixture of graphene oxide and ice into a freeze dryer, and freeze-dry for 48-96 hours. At this time, the ice in the mixture of graphene oxide and ice is completely sublimated to obtain a graphene oxid...

specific Embodiment approach 3

[0046] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the AgCuTi powder described in step two is made by grinding and mixing AgCu eutectic alloy powder and Ti powder, and the mass fraction of Ti in the AgCuTi powder is 3.0~ 6.0 wt.%.

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Abstract

The invention provides a method for improving the high-temperature oxidation resistance of AgCu alloy by using a three-dimensional network reinforced phase and relates to the method for improving the high-temperature oxidation resistance of the AgCu alloy. By means of the method for improving the high-temperature oxidation resistance of the AgCu alloy by using the three-dimensional network reinforced phase, the problem that existing silver-copper-based brazing filler metal is poor in high-temperature oxidation resistance is solved. The method comprises the steps that graphene sponge is prepared, AgCuTi soldering paste is prepared and formed to obtain flaky solid AgCuTi soldering paste, the graphene sponge is placed between two pieces of the solid AgCuTi soldering paste to obtain a to-be-infiltrated test piece, infiltration is performed under the vacuum condition to obtain the AgCu alloy enhanced by three-dimensional network TiC, and finally a Cu2Ti compound aggregation layer is removed through polishing. The three-dimensional network TiC nanosheet reinforced phase prepared by the method can form effective and continuous multiple obstructions on internal diffusion of oxygen in the AgCu alloy, and the problem that in a conventional method for preparing an anti-oxidation coating, the anti-oxidation function fails due to abrasion damage of a surface coating is solved. The method is suitable for preparing the AgCu alloy.

Description

technical field [0001] The invention relates to a method for improving high temperature oxidation resistance of AgCu alloy. Background technique [0002] The development of modern industrial technology has continuously put forward higher requirements for high-quality brazing of dissimilar materials. Especially in the fields of aviation, aerospace, and energy, brazed joints are constantly facing the challenge of high-temperature service problems. For example, in the field of aerospace, the service temperature of high-pressure compressor discs, blades, blisks and other engine components in the high-temperature section can reach 600°C; the increase in the flight speed of supersonic vehicles also requires further increase in the service temperature of its skin, skeleton and other components , the surface temperature of an aircraft with a Mach number of 6 can reach above 650°C; the temperature of the mid-temperature domain thermoelectric material skutterudite and electrode joints...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/10C22C1/02C22C5/08C22C32/00
CPCC22C1/1015C22C1/1036C22C5/08C22C32/0052C22C1/1057
Inventor 张丽霞张博孙湛耿慧远常青
Owner HARBIN INST OF TECH
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