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Open Al-Cu sound-absorbing material and preparation method thereof

A sound-absorbing material, al-cu technology, applied in the direction of sound-emitting devices, instruments, etc., to achieve the effects of short reaction time, low cost and high production efficiency

Inactive Publication Date: 2010-06-16
DALIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention discloses an open-pore Al-Cu sound-absorbing material and a preparation method thereof through combustion reaction synthesis, which further im

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The purity of raw material Al powder and Cu powder is 99.9%, both are 200 mesh;

[0020] The pore forming agent NaCl and anhydrous K2CO3 are analytically pure, and the average particle size is 10 μm;

[0021] Weigh the powder according to the ratio of Al: 24.175g, Cu: 38.035g (Cu:Al≈1.57:1), NaCl: 10.72g, and then mix the powder evenly;

[0022] A cylindrical compact sample with a diameter of 29 mm and a thickness of 20 mm was obtained by pressing under a pressure of 950 MPa by powder metallurgy molding method;

[0023] Put the sample into a stainless steel container, the thickness of the container wall is about 1mm, fill the gap with foundry sand, and fully compact the compacted sand;

[0024] Put the stainless steel container with the sample in the high-frequency electromagnetic induction coil for heating and sintering at a heating rate of about 100°C / min, and stop heating when the temperature reaches 960°C;

[0025] Ultrasonic cleaning for 1 hour after sample cooli...

Embodiment 2

[0030] The purity of raw material Al powder and Cu powder is 99.9%, both are 200 mesh;

[0031] The pore forming agent NaCl and anhydrous K2CO3 are analytically pure, and the average particle size is 10 μm;

[0032] Weigh the powder according to the ratio of Al: 19.34g, Cu: 30.428g (Cu:Al≈1.57:1), K2CO3: 16.042g, and then mix the powder evenly;

[0033] A cylindrical compact sample with a diameter of 29 mm and a thickness of 20 mm was obtained by pressing under a pressure of 950 MPa by powder metallurgy molding method;

[0034] Put the sample into a stainless steel container, the thickness of the container wall is about 1mm, fill the gap with foundry sand, and fully compact the compacted sand;

[0035] Put the stainless steel container with the sample in the high-frequency electromagnetic induction coil for heating and sintering at a heating rate of about 110°C / min, and stop heating when the temperature reaches 960°C;

[0036] Ultrasonic cleaning for 1 hour after sample cool...

Embodiment 3

[0041] The purity of raw material Al powder and Cu powder is 99.9%, both are 200 mesh;

[0042] The pore forming agent NaCl and anhydrous K2CO3 are analytically pure, and the average particle size is 10 μm;

[0043] Weigh the powder according to the ratio of Al: 14.805g, Cu: 22.821g (Cu:Al~1.54:1), K2CO3: 20.053g, and then mix the powder evenly;

[0044] A cylindrical compact sample with a diameter of 29 mm and a thickness of 20 mm was obtained by pressing under a pressure of 950 MPa by powder metallurgy molding method;

[0045] Put the sample into a stainless steel container, the thickness of the container wall is about 1mm, fill the gap with foundry sand, and fully compact the compacted sand;

[0046] Put the stainless steel container with the sample in the high-frequency electromagnetic induction coil for heating and sintering at a heating rate of about 120°C / min, and stop heating when the temperature reaches 960°C;

[0047] Ultrasonic cleaning for 1 hour after sample coo...

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Abstract

The invention discloses open Al-Cu sound-absorbing material and preparation method of the open Al-Cu sound-absorbing material by adopting combustion reaction synthesis method. The problems existing in the traditional material and the preparation method are solved. The open Al-Cu sound-absorbing material comprises the component of an Al-Cu intermetalic compound, holes inside the open Al-Cu sound-absorbing material are mutually linked and penetrated through, the porosity is about 62.5 percent and the sound-absorbing coefficient can reach up to 0.735. The open Al-Cu sound-absorbing material is prepared by adopting a combustion reaction synthesis process and comprising the steps of: uniformly mixing Al powder and Cu powder as powder raw materials, a pore-forming material of NaCl and anhydrousK2CO3; preparing a columnar sample by adopting mould pressing of powder metallurgy; putting a stainless steel container filled with the sample and casting model powder in a high-frequency electromagnetic induction coil for heating and sintering; ultrasonically cleaning after the sample is cooled, and drying; and detecting the sound-absorbing property of the sample. The Al-Cu sound-absorbing material has better sound-absorbing property; and the invention has the advantages of simple process of combustion reaction synthesis, short reaction time, controllable sintering temperature, low cost, high efficiency, energy saving and environment protection.

Description

technical field [0001] The invention relates to a sound-absorbing material and a manufacturing method thereof, in particular to a perforated Al-Cu sound-absorbing material and a manufacturing method thereof. Background technique [0002] Energy saving and environmental protection are the basic national policies of our country, and governments at all levels attach great importance to the problem of noise pollution. The most effective noise control in practical application is to achieve the effect of noise reduction through the use of sound-absorbing materials, which means that sound-absorbing materials are an indispensable and important technical link. [0003] Among the current sound-absorbing materials, metal porous sound-absorbing materials have the advantages of good sound absorption performance, high strength, high temperature resistance and water resistance. It is especially suitable for sound absorption and noise reduction of outdoor elevated light rail barriers, cool...

Claims

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Application Information

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IPC IPC(8): G10K11/162C22C1/08
Inventor 王宙付传起室谷贵之于驰赵明华李斌
Owner DALIAN UNIV