Method for preparing CuAl2O3 composite material through spray co-deposition reaction

Abstract

The invention discloses a method for preparing CuAl2O3 composite material through a spray co-deposition reaction, which comprises the following steps: 1, processing of CuO powder; 2, preparation of alloy fusant; 3, preparation of CuAl / CuO alloy by the spray co-deposition; 4, preparation of CuAl2O3 composite material by carrying out in situ chemical reaction on the CuAl / CuO alloy; and 5, extrusion, rolling and drawing. The Al2O3 particle in the invention is synthesized by the in situ chemical reaction, has fresh reaction interface, is firmly matched with Cu, has nano-scale size, and obvious enhanced effect. The method of the invention has the characteristics of simple raw material preparation, excellent performance of the prepared materials, and easily controlled process; and the dispersion distribution of the wide phase of the composite material particle is completed by deformation through the process, and the problem of difficult subsequent process of the particle enhanced metal matrix composite is preferably solved.

Description

technical field [0001] The invention belongs to the technical field of metal matrix composite materials, and in particular relates to the preparation of CuAl by spray co-deposition reaction 2 o 3 Composite approach. Background technique [0002] CuAl 2 o 3 Composite materials not only have good electrical and thermal conductivity, but also have high hardness, strength and softening temperature, etc., and are widely used in automobiles, electronics, electrical engineering, electromechanical and other fields. [0003] In foreign countries, in the 1970s, the powder internal oxidation method was used to mass-produce CuAl 2 o 3 Composite materials, such as the Al of C15715 and C15760 produced by SCM Company in the United States 2 o 3 Dispersion-strengthened copper-based composite material has a softening temperature of 900°C, an electrical conductivity of 90% IACS, and a tensile strength of 540 MPa, and has formed a production scale of 20 tons per day. Companies from Japa...

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Problems solved by technology

Although these known preparation methods have all obtained CuAl 2 o 3 Composite materials, but there are obvious deficiencies, mainly as follows: the preparation process of powder metallurgy method is complicated, the cost is high, and the production efficiency is low; the composite powder made by mechanical alloying method will appear in the process of sintering. The segregation and growth of the composite material affect the performance of the composite material; the chemical co-precipitation method and the composite electrodeposition method pollute the environment, and the material performance obtained by the chemical co-precipitation method is low, and the particles of the composite electrodeposition method are evenly suspended in the plating solution It is not easy to control; the preparation process of the reaction synthesis method is complicated, and it takes a long time to mix powder and segmental sintering; although the CuAl prepared by the internal oxidation method 2 o 3 Composite materials have good comprehensive properties, but in the preparation process, oxygen partial pressure, oxidation time and oxidation amount are difficult to control, resulting in complex processes, long production cycles, and unstable product quality, which is not conducive to industrial production

In addition, the composite materials prepared by these methods cannot be directly prepared into near-shaped components such as ingots, plates, and wheels. The material preparation technology is complicated, the product quality is difficult to control, the production cost is high, and large-scale production cannot be formed.

lead to CuAl 2 o 3 Compared with foreign countries, there is a big gap in the preparation level and comprehensive performance of composite materials, and large-scale applications still rely on imports

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