Method for preparing oxide dispersion strengthened copper composite material

Abstract

The invention relates to a method for preparing an oxide dispersion strengthened copper composite material, and belongs to the field of preparation of copper alloy materials. The method is as follows:firstly reducing Cu powder; alloying element powder, to be more specific, thoroughly mixing the reduced Cu powder with an appropriate amount of Y powder to obtain a Cu powder and Y powder mixture, then packaging the Cu powder and Y powder mixture and grinding balls in a stainless steel ball mill tank, and performing ball milling under an inert gas atmosphere; after the ball milling, annealing alloyed alloy powder by a muffle furnace, and sintering the annealed alloy powder into a block by a discharge plasma sintering furnace, and then rolling the block into a desiring thickness; and finally using a muffle furnace to perform heat treatment on the rolled copper alloy, and cooling in the furnace to obtain the oxide dispersion strengthened copper composite material. The oxide dispersion strengthened copper composite material prepared by the method has uniform distribution of nano-oxide particles with an average size of 5-6 nm, the powder production rate is over 95%, and the process is simple and easy to operate.

Description

technical field [0001] The invention belongs to the field of preparation of copper alloy materials, in particular to a method for strengthening copper composite materials by using oxide dispersion. Background technique [0002] Dispersion strengthened copper composites have excellent physical and mechanical properties, including room temperature strength and high temperature strength, wear resistance, electrical conductivity, thermal conductivity and fusion welding resistance, etc. The more common types of dispersed phases in copper are Al 2 o 3 , Y 2 o 3 wait. and Al 2 o 3 Compared to Y 2 o 3 It has a fluorite-like structure and forms a coherent relationship with the copper matrix, resulting in a spinel-structured Al 2 o 3 Precipitation strengthening that cannot be formed by particles. In addition, Y 2 o 3 The thermal stability of rare earth elements is high, and the extremely low solid solubility and small diffusion rate of rare earth elements in the copper la...

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Problems solved by technology

Cu-Y prepared by vacuum melting method 2 o 3 Composite materials, generating brittle Cu-Y intermetallic compounds at their grain boundaries, the presence of these intermetallic compounds will deteriorate the performance of the material

However, the reported Cu-Y by mechanical alloying 2 o 3 It is found in the literature of composite materials that there are problems such as Y not integrated into the matrix and local enrichment, and directly adding Y 2 o 3 May lead to problems such as uneven distribution of dispersed phase and easy segregation (G. Carro , A. Muñoz. Fabrication and characterization of Y 2 o 3 dispersion strengthened copper alloys [J]. Journal of Nuclear Materials, 455 (2014) 655–659)

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