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Preparation method of submicron aluminum base alloy powder

A sub-micron, aluminum-based alloy technology, applied in metal processing equipment, transportation and packaging, etc., can solve the problems of poor aluminum alloy powder performance, poor fluffy effect, poor bonding strength, etc., to improve the density, particle size and fluffy. , the effect of enhancing the bonding strength

Inactive Publication Date: 2019-12-31
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Among them, since the existing aluminum-based alloy powders mostly use a variety of reinforcements, which are added to the aluminum-based alloy powders in any proportion, this causes many problems in the prepared aluminum-based alloy powders, such as: combining Poor strength, prone to agglomeration, easy to layer, easy to appear bubbles, large particle size, poor fluffy effect, etc.
[0004] At the same time, the existing aluminum-based alloy powders have a long preparation cycle and complicated procedures, and the prepared aluminum alloy powders have poor performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Place the aluminum hydroxide powder and aluminum oleate in a beaker in turn, place them in a water bath at 80°C for hydration treatment, and place the aluminum hydroxide powder and aluminum oleate after the hydration treatment in a roasting furnace. Under the protection of nitrogen, a stage of calcination is carried out to transform the aluminum hydroxide powder into γ-alumina. Zirconium and magnesia are mixed evenly; then, the second-stage roasting is carried out in a roasting furnace, wherein the temperature of the second-stage roasting is 850°C, and submicron-sized aluminum powder is obtained after roasting.

[0036] After mixing the submicron aluminum powder, Al-Ta alloy, Ti-Ni alloy, molybdenum disilicide whisker and titanium diboride in a mass ratio of 87:8:1:3, they are placed in a ball mill jar, wherein The mass ratio of Al to Ta in the Al-Ta alloy is 7:1, and the mass ratio of Ti to Ni in the Ti-Ni alloy is 5:1. After ball milling, pre-press into green embryos...

Embodiment 2

[0038] Place the aluminum hydroxide powder and aluminum oleate in a beaker in turn, place them in a water bath at 80°C for hydration treatment, and place the aluminum hydroxide powder and aluminum oleate after the hydration treatment in a roasting furnace. Carry out a period of roasting under the protection of nitrogen to transform the aluminum hydroxide powder into γ-alumina, and the roasting temperature is 800°C; then pickle the γ-alumina, filter and dry it, add zirconia and oxide Magnesium, mixed evenly; then carry out two-stage roasting in a roasting furnace, wherein the roasting temperature is 900°C, and sub-micron aluminum powder is obtained after roasting.

[0039] After mixing submicron aluminum powder, Al-Ta alloy, Ti-Ni alloy, molybdenum disilicide whisker and titanium diboride in a mass ratio of 89:9:2:7, they are placed in a ball mill jar, wherein, the The mass ratio of Al to Ta in the Al-Ta alloy is 10:1, and the mass ratio of Ti to Ni in the Ti-Ni alloy is 8:1. ...

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Abstract

The invention provides a preparation method of submicron aluminum base alloy powder. The method comprises the following steps that firstly, submicron aluminum hydroxide powder and an additive are mixed and subjected to hydration treatment, obtained hydrated aluminum hydroxide powder is subjected to one-stage roasting under protective atmosphere, and gamma-aluminum oxide is obtained; secondly, a crystal growth inhibitor and a sintering aid are added after the gamma-aluminum oxide obtained in the first step is subjected to acid pickling, and submicron aluminum powder is obtained after two-stageroasting is performed; thirdly, the submicron aluminum powder obtained in the second step, Al-Ta alloy, Ti-Ni alloy, molybdenum disilicide whisker and titanium diboride powder are mixed and subjectedto ball milling, and mixed powder is obtained; and fourthly, the mixed powder mentioned in the third step is subjected to prepressing, degassing, sintering, heat treatment and hot isostatic pressing,and then the submicron aluminum base alloy powder is obtained.

Description

technical field [0001] The invention belongs to the technical field of aluminum-based alloy powders, and in particular relates to a submicron aluminum powder and a method for preparing aluminum-based alloy powders. Background technique [0002] Aluminum-based alloy powder is a heterogeneous mixture of metal aluminum and other alloys as the matrix, and metal, non-metallic particles, whiskers or fibers as reinforcements. It has a very wide range of applications in the fields of aerospace and industrial lighting. [0003] Among them, since the existing aluminum-based alloy powders mostly use a variety of reinforcements, which are added to the aluminum-based alloy powder in any proportion, this causes many problems in the prepared aluminum-based alloy powder, such as: combining Poor strength, easy to agglomerate, easy to layer, easy to appear bubbles, large particle size, poor fluffy effect, etc. [0004] At the same time, the existing aluminum-based alloy powder has a long pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00B22F9/20B22F9/04B22F3/15C22C47/14C22C49/06C22C49/14C22C101/08
CPCB22F1/0003B22F9/20B22F9/04B22F3/15C22C47/14C22C49/06C22C49/14B22F2009/043B22F1/142
Inventor 刘芳洋蒋良兴艾亮贾明
Owner CENT SOUTH UNIV