Preparation method for preparing copper-aluminum alloy gradient material through photocuring

Abstract

The invention discloses a method for preparing a copper-aluminum alloy gradient material by photocuring, which comprises the following specific steps: 1, weighing copper and aluminum powder of 2-5 microns, carrying out high-energy ball milling for 10-20 hours, and then filtering by using a 200-800-mesh screen; 2, epoxy acrylate, a diluent, an initiator and a defoaming agent are subjected to vacuum stirring for 10-30 min, and a premixed solution is obtained; 3, the filtered copper powder, the filtered aluminum powder and the premixed liquid are subjected to vacuum stirring, and copper slurry and aluminum slurry obtained after light curing are obtained respectively; and 4, the copper alloy is cured through a DLP light curing machine till the end, then the aluminum alloy is cured till the end, and finally the copper-aluminum alloy gradient material of the dissimilar material is obtained.

Description

Technical Field

[0001] The invention relates to the technical field of photocuring additive manufacturing and prepares a copper-aluminum alloy gradient material with good curing performance. Background Art

[0002] Copper and aluminum alloys are widely used in modern industry and engineering technology because of their good electrical conductivity, thermal conductivity, corrosion resistance and easy cutting performance. Various household appliances, power transmission facilities, integrated circuits are inseparable from copper, aluminum and their alloys, which are an indispensable component of daily life and production. With the advancement of science and technology, traditional processing and preparation methods are difficult to meet the high performance requirements of industry and engineering, which hinders their development and application in related fields. Therefore, how to improve the comprehensive mechanical properties of copper and aluminum alloys has become a major problem that has troubled international material scientists in recent years.

[0003] The strength and plasticity of copper and aluminum alloys prepared by traditional processes seem to be contradictory performance characteristics, showing an "inverted" relationship, that is, high-strength metals often have low plasticity, and it is difficult to have both strength and plasticity. At present, industrial preparation methods are mostly based on the design requirements of the product to meet the requirements of the preset working environment. The shortcomings of strength and plasticity limit the possibility of further development of related products. Homogeneous bulk nanocrystalline and ultrafine crystalline materials can achieve extremely high strength. Researchers have found that homogeneous bulk nano / ultrafine crystalline materials prepared by large plastic deformation processes can effectively improve the strength of the materials, and gradually derived process technologies such as equal-diameter angular extrusion, asynchronous rolling, cumulative rolling, dynamic plastic deformation, and high-pressure torsion. However, the gradient materials prepared by the above-mentioned large plastic deformation process have the shortcoming of extremely low uniform elongation.

[0004] It should be pointed out that the photopolymerization of copper-aluminum alloy gradient materials effectively alleviates the deformation heterogeneity of the heterogeneous zone, which helps to improve the global yield strength of the heterogeneous structural material and maintain ductility. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the shortcomings of the above-mentioned prior art: to provide a copper-aluminum alloy gradient material with good curing performance. The applicant has found that by adjusting the color, particle size, particle size distribution, etc. of copper and aluminum alloys, the absorption, refraction and scattering of ultraviolet light by ceramic powder can also be affected. The present invention realizes a method for preparing a copper-aluminum alloy gradient material with good curing performance by reasonable grading and matching the color and particle size distribution of ceramic powder.

[0006] The technical solution of the present invention is as follows: A method for preparing a copper-aluminum alloy gradient material by photocuring, comprising the following specific steps:

[0007] 1) Weighing a surface modifier and copper and aluminum alloy particles of different colors and different particle sizes, mixing and stirring for 1-50 hours, and then drying to obtain modified copper and aluminum alloy particles;

[0008] 2) Mixing the modified copper and aluminum alloy particles with a diluent and performing vacuum stirring to remove bubbles for 10-30 minutes to obtain a premixed solution, wherein, by weight, the diluent comprises 100 parts, the modified copper and aluminum alloy particles 1-30 parts;

[0009] 3) Adding 1-10 wt.% of initiator into the premixed liquid and performing vacuum stirring to remove bubbles for 20-30 min to obtain a method for preparing a copper-aluminum alloy gradient material by photocuring.

[0010] As an optimization, the surface modifier is one or more of KH550, KH560, and KH570.

[0011] As an optimization, in step 1), by weight: 10-15 parts of surface modifier, 30-40 parts of a mixture of copper and aluminum alloy particles with a particle size range of 2-5 μm.

[0012] As the most preferred, in step 1), by weight: 10-15 parts of surface modifier;

[0013] 5-6 parts of copper and aluminum alloy particles with a particle size of 2-5 μm produced and sold by Aladdin;

[0014] Preferably, the diluent is one or more of HEA, HDDA, and TMPTA. Preferably, the initiator is one or more of TPO, 819, and 184.

[0015] The zirconium oxide ceramic slurry prepared by the present invention is solidified and formed on a 405nm optical machine to obtain a copper and aluminum alloy blank; the solidified blank is degreased; and the degreased copper and aluminum alloy blank is placed in a gas pressure sintering furnace at a sintering temperature of 1200-2200°C. DETAILED DESCRIPTION

[0016] The present invention is further described in detail below with specific examples, but the present invention is not limited to the following specific examples.

[0017] Implementation Cases

[0018] A copper-aluminum alloy gradient material with good curing performance is prepared according to the following method, and the specific steps are as follows:

[0019] 1) Weigh the surface modifier KH550 and copper-aluminum alloy particles of different colors and different particle sizes, mix and stir for 20 minutes, and then dry to obtain modified copper-aluminum alloy particles; by weight: 15 parts of surface modifier;

[0020] Aladdin produces and sells 5-6 portions of copper and aluminum alloy particles with a particle size of 2-5 μm.

[0021] 2) Mixing the modified copper-aluminum alloy particles with a diluent and performing vacuum stirring to remove bubbles for 30 minutes to obtain a premixed solution, wherein, by weight, the diluent HDDA is 100 parts and the modified copper-aluminum alloy is 30 parts;

[0022] 3) Add 10 wt.% of initiator TPO to the premixed liquid and perform vacuum stirring to remove bubbles. Stirring time is 30 min to obtain a particle slurry with good curing performance.

[0023] The slurry prepared in this embodiment is cured on a 405nm optical machine, and the copper alloy is cured by a DLP optical curing machine until completion, and then the aluminum alloy is cured until completion, and finally a copper-aluminum alloy gradient material of heterogeneous materials is obtained. The cured green body is degreased; then the degreased green body is placed in a gas pressure sintering furnace, and the sintering temperature is 1200-2200°C.

[0024] The above are only examples of the features of the present invention and do not constitute any limitation on the protection scope of the present invention. Any technical solution formed by equivalent exchange or equivalent replacement falls within the protection scope of the present invention.

Claims

1. A method for preparing a copper-aluminum alloy gradient material by photocuring, characterized in that: The specific steps include: 1.1 Weigh the surface modifier and copper and aluminum alloy particles of different colors and sizes, mix and stir for 10-20 minutes, and then dry to obtain the modified copper and aluminum alloy powder; 1.2 Mix the modified copper and aluminum alloy powders with the diluent and stir them under vacuum to remove bubbles for 10-30 minutes to obtain a premixed solution, wherein the premixed solution comprises 100 parts of the diluent and 1-30 parts of the modified copper and aluminum alloy powders in parts by weight; 1.3 Add 1-10wt.% of initiator to the premixed liquid and stir in vacuum to remove bubbles. Stirring time is 20-30min to obtain copper and aluminum alloy slurry with good curing performance.

2. The method for preparing a photocurable copper-aluminum alloy gradient material with good curing performance according to claim 1, characterized in that: The surface modifier is one or more of KH550, KH560 and KH570.

3. The method for preparing a copper-aluminum alloy gradient material by photocuring according to claim 1, characterized in that: In step 1), by weight: 10-15 parts of a surface modifier, and 30-40 parts of a copper and aluminum alloy mixture with a particle size range of 2-5 μm.

4. The method for preparing a copper-aluminum alloy gradient material by photocuring according to claim 3, characterized in that: 10-15 parts of surface modifier; 5-6 parts of copper and aluminum alloy particles with a particle size of 2-5μm produced and sold by Aladdin.

5. The method for preparing a copper-aluminum alloy gradient material by photocuring according to claim 1, characterized in that: The diluent is one or more of HEA, HDDA and TMPTA.

6. The method for preparing a copper-aluminum alloy gradient material by photocuring according to claim 1, characterized in that: The initiator is one or more of TPO, 819, and 184. The porcelain slurry prepared by the present invention is solidified and formed on a 405nm optical machine to obtain a copper and aluminum alloy blank; the solidified blank is degreased; and the degreased copper and aluminum alloy blank is placed in a gas pressure sintering furnace at a sintering temperature of 1200-2200°C.