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A kind of high thermal conductivity and low expansion deformation aluminum alloy and its preparation method

A deformed aluminum alloy and low-expansion technology, applied in the field of deformed aluminum alloy, can solve the problems of difficult thermal conductivity, mutual balance between thermal expansion coefficient and preparation cost, alloy thermal conductivity difficult to meet the requirements of heat dissipation performance, and large influence of aluminum alloy thermal conductivity. , to achieve the effect of simple and easy preparation operation, easy control of addition amount, simultaneous improvement of thermal conductivity and thermal expansion performance

Active Publication Date: 2022-03-08
SOUTH CHINA UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the Si element has a relatively great influence on the thermal conductivity of aluminum alloys, and the thermal conductivity of this alloy is difficult to meet the current requirements of high power consumption devices on the heat dissipation performance of packaging materials.
[0006] Some of the above-mentioned patented technologies involve aluminum-based composite materials, high thermal conductivity die-casting aluminum alloys, and high-silicon aluminum alloys. It is difficult for these alloys to simultaneously achieve a mutual balance between thermal conductivity, thermal expansion coefficient, and manufacturing cost, and cannot meet the needs of packaging in the context of current electronic devices. Material thermal conductivity and thermal expansion requirements limit the industrial application range of these alloys in high-power semiconductor devices

Method used

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  • A kind of high thermal conductivity and low expansion deformation aluminum alloy and its preparation method
  • A kind of high thermal conductivity and low expansion deformation aluminum alloy and its preparation method
  • A kind of high thermal conductivity and low expansion deformation aluminum alloy and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0094] Example 1: Al-1.75Fe-1.25Ni-0.5Yb Alloy Vibration Casting Roll Forming

[0095] The alloy composition prepared in this example is Al-1.75Fe-1.25Ni-0.5Yb, which is prepared by industrial pure aluminum, Al-20Fe, Al-10Ni and Al-10Yb master alloy, and the composition is by weight percentage: Fe: 1.75 %, Ni: 1.25%, Yb: 0.5%, and the balance is Al.

[0096] The alloy preparation process of this example is basically the same as that of Comparative Example 1, the difference is that the structure of the alloy melt is controlled by mechanical vibration, and the melting process parameters are also different. details as follows:

[0097] (1) Alloy melting and mechanical vibration casting

[0098] The weighed industrial pure aluminum is melted, and the melting temperature is 750°C. After it is completely melted, add Al-20Fe and Al-10Ni master alloys, stir for 2 minutes to make the composition uniform, and keep it for 5 minutes. When the melt temperature drops to 720°C, add Al-10...

Embodiment 2

[0108] Example 2: Al-1.75Fe-1.25Ni-0.5Mg Alloy Vibration Casting Roll Forming

[0109] The alloy composition prepared in this example is Al-1.75Fe-1.25Ni-0.5Mg, which is prepared by industrial pure aluminum, Al-20Fe, Al-10Ni and Al-10Mg master alloy, and the composition is by weight percentage: Fe: 1.75 %, Ni: 1.25%, Mg: 0.5%, and the balance is Al.

[0110] The alloy preparation process of this example is basically the same as that of Example 1, the difference is that Mg element is used for microstructure control, and there are also differences in melting process parameters. details as follows:

[0111] (1) Alloy melting and mechanical vibration casting

[0112] The weighed industrial pure aluminum is melted, and the melting temperature is 730°C. After it is completely melted, add Al-20Fe and Al-10Ni master alloys, stir manually for 10 minutes to make the composition uniform, and keep it for 20 minutes. When the melt temperature drops to 700°C, add Al-10Mg modifier, manua...

Embodiment 3

[0122] Example 3: Al-1.5Fe-2.0Ni-0.2Yb-0.3Mg Alloy Vibration Casting Roll Forming

[0123] The alloy composition prepared in this example is Al-1.5Fe-2.0Ni-0.2Yb-0.3Mg, which is prepared by industrial pure aluminum, Al-20Fe, Al-10Ni, Al-10Yb and Al-10Mg master alloys, and the composition is as follows The weight percentage is: Fe: 1.5%, Ni: 2.0%, Yb: 0.2%, Mg: 0.3%, and the balance is Al.

[0124] The alloy preparation process of this example is basically the same as that of Example 1, the difference is that Yb and Mg elements are used to synergistically regulate the microstructure of the alloy, and there are also differences in the melting process parameters. details as follows:

[0125] (1) Alloy melting and mechanical vibration casting

[0126] The weighed industrial pure aluminum is melted, and the melting temperature is 740°C. After it is completely melted, add Al-20Fe and Al-10Ni master alloys, stir manually for 5 minutes to make the composition uniform, and keep it f...

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Abstract

The invention belongs to the technical field of deformed aluminum alloys, and discloses a deformed aluminum alloy with high thermal conductivity and low expansion and a preparation method thereof. The deformed aluminum alloy includes the following components in terms of mass percentage: Fe 1.5-2.5%, Ni 1.0-2.0%, Yb 0-0.5%, Mg 0-0.5%, and the balance is Al; Yb and Mg are not 0 at the same time The deformed aluminum alloy is obtained by performing mechanical vibration casting on the melt; or after mechanical vibration casting, annealing treatment and rolling deformation treatment. The invention also discloses a preparation method of the deformed aluminum alloy. The invention adopts Yb and / or Mg composite modification and vibration casting to improve the microstructure appearance of the alloy, and realizes the multi-objective balance optimization of the alloy thermal conductivity, thermal expansion coefficient and mechanical performance. The deformed aluminum alloy of the invention has high thermal conductivity, low expansion and high mechanical properties.

Description

technical field [0001] The invention relates to the technical field of deformed aluminum alloys, in particular to a deformed aluminum alloy with high thermal conductivity, low expansion and relatively high strength and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of large-scale integrated circuit technology, the field of electronic packaging has put forward higher requirements on the thermal conductivity and thermal expansion performance of the substrate. Due to the low thermal expansion coefficient of the chip, the thermal mismatch between the electronic device and the substrate is directly caused by the increase in temperature, resulting in an increase in thermal stress, which makes the device's working performance degrade sharply. Therefore, packaging materials are required to have high thermal conductivity and low thermal expansion coefficient to ensure efficient, safe and stable use of devices. At present, alum...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/04C22F1/043C22C1/03C22C1/06H01L23/14
CPCC22C21/04C22C1/026C22C1/03C22C1/06C22F1/043H01L23/14
Inventor 杜军罗干郭加林周明君曾阳阳
Owner SOUTH CHINA UNIV OF TECH
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