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A kind of preparation method of w-cu continuous gradient composite material

A composite material and gradient technology, which is applied in the field of preparation of W-Cu continuous gradient composite materials, can solve the problems affecting the application of W-Cu continuous gradient composite materials, difficult to obtain W-Cu composite materials, high raw material requirements, and high cost Low, simple equipment, simple equipment requirements

Active Publication Date: 2021-05-04
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In summary, there are still few methods for preparing W-Cu continuous gradient composite materials. The existing methods have high requirements for raw materials and complicated processes, and it is difficult to obtain W-Cu composite materials with continuous gradient distribution of components along the cross section. , which greatly affects the application of W-Cu continuous gradient composites

Method used

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  • A kind of preparation method of w-cu continuous gradient composite material
  • A kind of preparation method of w-cu continuous gradient composite material
  • A kind of preparation method of w-cu continuous gradient composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Example 1: Preparation of W-Cu continuous gradient composites with different binder content slurries

[0033] (1) According to the mass ratio of 1:1:1:1, 50g of W powders with different particle sizes (0.8μm, 1.2μm, 2μm and 4.5μm) were weighed respectively, and different contents of (2%, 3%, 4%, 5 %) polyvinyl butyral (PVB), placed in a mixing tank and mixed in a light mixer for 2 hours to obtain a mixed powder. Take out the mixed powder obtained and pour it into a ball mill jar, add polyethylene glycol 400 and dibutyl phthalate with the same content as PVB, then add 41g of absolute ethanol, add 200g of cemented carbide balls, ball mill for 12 hours, and rotate at a speed of 300r / min. The obtained slurry was kept at a constant temperature of 25° C. to allow the W in the slurry to settle, and at the same time, the solvent was volatilized and dried during and after the settling process to obtain a green body.

[0034] (2) The obtained blank is deglued at 350°C, and the...

Embodiment 2

[0038] Example 2: Preparation of W-Cu continuous gradient composite material at different sintering temperatures

[0039] In this example, the W-Cu continuous gradient composite material was prepared according to the same method as sample 3 in Example 1, the only difference being that the sintering temperatures in step (2) were 1000°C, 1200°C, 1500°C, and 1800°C respectively, and the obtained samples Labeled in order as Sample A, Sample B, Sample C, and Sample D.

[0040] Field emission observation and EDS energy spectrum characterization were carried out on the morphology of the obtained samples. The results showed that each sample had a dense structure, Cu was distributed in a continuous gradient, and the continuity was good. And the Cu content distribution along the cross section of sample A, sample B, sample C, and sample D is 28.03wt% ~ 44.47wt%, 15.23wt% ~ 34.2wt%, 8.32wt% ~ 28.0wt% and 0wt% ~ 25.33wt% %. It can be seen that by adjusting the sintering temperature of th...

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Abstract

The invention discloses a preparation method of a W-Cu continuous gradient composite material, which uses W powders of different particle sizes as raw materials, adds binders, dispersants, plasticizers, etc., mixes them through ball milling to obtain suspension slurry, and then settles and dries to obtain The green body is debinding and sintered to obtain a W skeleton with a continuous gradient distribution of pores, and then infiltrated with Cu at a certain temperature, and finally a W-Cu continuous gradient composite material with W and Cu components continuously changing along the cross section is obtained. The invention can realize the continuous change of W and Cu components along the cross section, and further realize the continuous change of material properties along the cross section; the raw materials used in the method of the invention are easy to obtain, the process flow is short, and the cost is low, which is suitable for large-scale production.

Description

technical field [0001] The invention relates to a preparation method of a W-Cu continuous gradient composite material, which belongs to the field of metal matrix composite material preparation. Background technique [0002] The W-Cu functionally graded material combines the good electrical conductivity, thermal conductivity and corrosion resistance of Cu with the high hardness, strength and thermal stability of W, and at the same time it gradually transitions from high W (pure W) to high Cu (pure Cu) layers along the cross-section , with a variety of excellent performance, can meet the increasingly harsh environment. At present, W-Cu gradient materials are mostly prepared by lamination method. Since this lamination method does not really eliminate the internal interface between material layers, under high temperature or harsh working conditions, the inside of W-Cu layered gradient materials There is thermal stress between the interface of the layer and the layer and the the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/26B22F3/11B22F9/04
CPCB22F3/1109B22F3/26B22F9/04B22F2009/043B22F2999/00B22F2207/01
Inventor 程继贵魏邦争徐仙陈鹏起陈闻超高大路许荡高宇飞
Owner HEFEI UNIV OF TECH
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