Inert multilevel-structure tungsten-aluminum composite material and preparation method thereof

A composite material, tungsten-aluminum technology, applied in the field of inert multi-level structure tungsten-aluminum composite material and its preparation, can solve the problem of poor surface wear resistance and corrosion resistance of composite material, limited application field of tungsten-aluminum composite material, poor oxidation resistance, etc. problem, to achieve the effect of high temperature, good plasticity and good density

Inactive Publication Date: 2017-07-04
HUZHOU TEACHERS COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Metal tungsten has the advantages of high melting point, excellent strength under high temperature conditions, good thermal conductivity, small thermal expansion coefficient, strong ability to absorb radiation, and good corrosion resistance. However, tungsten has disadvantages such as difficult processing and poor oxidation resistance. The currently prepared tungsten Tungsten in aluminum composite materials is often dispersed in aluminum matrix composite materials, and the wear resistance and corrosion resistance of the composite material surface are poor, which limits the application field of tungsten-aluminum composite materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) After mixing 400g of tungsten powder with a purity greater than 99% and a particle size of 2-12μm and 200g of aluminum powder with a purity greater than 99% and a particle size of 4-200μm, use a planetary ball mill and 3kg of stainless steel balls to It is carried out under protected conditions, the rotation speed is 400r / min, and the ball milling time is 8h to obtain aluminum-coated tungsten particle cluster composite powder.

[0027] (2) 750g of aluminum-coated tungsten particle cluster composite powder and 250g of aluminum powder are used in a double-cone mixer, under the condition of argon protection, the weight ratio of the ball to the powder is 1:1, and the mixing time is 8h, the temperature of vacuum heating and degassing is 400°C, and the vacuum degree is lower than 1×10 -3 Raise the temperature under the condition of Pa, the heating rate is 50°C / h, install it in an aluminum sheath, vibrate, the degassing time is not less than 12h, seal it, and then raise th...

Embodiment 2

[0030] (1) After mixing 480g of tungsten powder with a purity of more than 99% and a particle size of 2-12μm and 120g of aluminum powder with a purity of more than 99% and a particle size of 4-200μm, use a planetary ball mill with 3kg of stainless steel balls and grind them under argon gas It is carried out under protected conditions, the rotation speed is 400r / min, and the ball milling time is 8h to obtain aluminum-coated tungsten particle cluster composite powder.

[0031] (2) 750g of aluminum-coated tungsten particle cluster composite powder and 250g of aluminum powder are used in a double-cone mixer, under the condition of argon protection, the weight ratio of the ball to the powder is 1:1, and the mixing time is 8h, the temperature of vacuum heating and degassing is 400°C, and the vacuum degree is lower than 1×10 -3 Raise the temperature under the condition of Pa, the heating rate is 50°C / h, install it in an aluminum sheath, vibrate, the degassing time is not less than 12...

Embodiment 3

[0034](1) After mixing 400g of tungsten powder with a purity greater than 99% and a particle size of 2-12μm and 200g of aluminum powder with a purity greater than 99% and a particle size of 4-200μm, use a planetary ball mill and 3kg of stainless steel balls to It is carried out under protected conditions, the rotation speed is 400r / min, and the ball milling time is 8h to obtain aluminum-coated tungsten particle cluster composite powder.

[0035] (2) 700g of aluminum-coated tungsten particle cluster composite powder and 300g of aluminum powder are used in a double-cone mixer, under the condition of argon protection, the weight ratio of the ball to the powder is 1:1, and the mixing time is 8h, the temperature of vacuum heating and degassing is 400°C, and the vacuum degree is lower than 1×10 -3 Raise the temperature under Pa condition, the heating rate is 50°C / h, install it in an aluminum sheath, vibrate, the degassing time is not less than 12h, seal it, and then raise the temper...

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Abstract

The invention provides an inert multilevel-structure tungsten-aluminum composite material and a preparation method thereof. The inert multilevel-structure tungsten-aluminum composite material comprises a multilevel-structure tungsten-aluminum composite material and a compact and even tungsten-aluminum metallic compound protecting layer WAl12 or Wal5. The specific preparation method comprises steps as follows: tungsten powder and aluminum powder are mixed and then subjected to ball milling, and aluminum coated tungsten particle cluster composite powder is obtained; the aluminum coated tungsten particle cluster composite powder is mixed with the aluminum powder, a mixture is placed in an aluminum sheath and subjected to compacting, vacuum heating degasification, sealing and hot-isostatic-pressure sintering, the aluminum sheath on the surface is removed, and the multilevel-structure tungsten-aluminum composite material is obtained; the multilevel-structure tungsten-aluminum composite material is put in a high-frequency induction heating furnace, vacuum pumping is performed or inert gas is introduced into the furnace for induction heating, the protecting layer is formed on the surface of the multilevel-structure tungsten-aluminum composite material, and then the inert multilevel-structure tungsten-aluminum composite material is obtained. The inert multilevel-structure tungsten-aluminum composite material prepared with the method is light and high in strength, is provided with the inert protecting layer on the surface, and has good wear resistance and corrosion resistance.

Description

technical field [0001] The invention belongs to the technical field of tungsten-aluminum composite materials, and in particular relates to an inert multi-level structure tungsten-aluminum composite material and a preparation method thereof. Background technique [0002] Metal matrix composites are heterogeneous mixtures of metals and alloys as the matrix, and metal or non-metallic wires, fibers, whiskers or ceramic granular combinations as the reinforcing phase. Metal matrix composites have a continuous and metal matrix, and have a high ratio Excellent properties such as strength, high specific modulus, good wear resistance, corrosion resistance and high temperature resistance. Aluminum matrix composites are rich in sources, easy to process, and develop rapidly. [0003] Aluminum matrix composites mainly include continuous fiber-reinforced composites and discontinuous particle-reinforced composites. Compared with the matrix aluminum alloy, the particle-reinforced aluminum m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/04C22C27/04C22C21/00B22F1/02B22F3/15B22F3/24
CPCC22C1/0416C22C1/045C22C21/00C22C27/04B22F3/15B22F3/24C22C2204/00B22F2003/248B22F1/17C22C1/047
Inventor 付竹兰杨秀枝
Owner HUZHOU TEACHERS COLLEGE
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