Production of aluminium-scandium alloys

一种合金、合金化元素的技术，应用在生产铝-钪系合金领域，能够解决缓慢、追加高纯Sc金属成本等问题

Inactive Publication Date: 2015-12-23
COMMONWEALTH SCI & IND RES ORG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current technology for producing Al-Sc alloys has faced many difficulties
Alloying Sc metal directly with aluminum melts is slow and may require extended times to dissolve bulk Sc metal or Sc master alloy unless the melt is heated to over 1150°C
In addition, this method requires the additional cost of producing high-purity Sc metal

Method used

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  • Production of aluminium-scandium alloys
  • Production of aluminium-scandium alloys
  • Production of aluminium-scandium alloys

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0136] Embodiment 1: produce Al 3 Sc powder

[0137] 4Al to 1ScCl 3 The molar ratio of 5g of Al powder with an average particle size of less than 15 microns to ScCl 3 Powder mix. The material is then placed in a quartz tube and heated at a temperature between 600°C and 900°C and a pressure below 100 mbar. The temperature was first held at 600°C for 10 minutes, then increased to 650°C for 10 minutes, and to 700°C for 10 minutes, and then increased to 800°C for 10 minutes and 900°C for 10 minutes. The material is then discharged and analyzed. The product is made of Al 3 A powder composed of Sc and a small amount of Sc. Figure 8 shows the XRD spectrum of the material, clearly showing that to correspond to the Al 3 The line of Sc is dominant.

Embodiment 2

[0138] Embodiment 2: produce Al 3 Sc powder

[0139] 4Al to 1ScCl 3 The molar ratio of 5g of Al powder with an average particle size of less than 15 microns to ScCl 3 Powder mix. The material is then placed in a quartz tube and heated at a temperature between room temperature and 900° C. and a pressure below 10 mbar. The temperature was raised in steps at 100° C. and the total heating time was 60 minutes. The material is then discharged and analyzed. The product is made of Al 3 Powder composed of Sc.

Embodiment 3

[0140] Embodiment 3: produce Al 3 (Sc-Zr powder)

[0141] 4Al to 0.5ScCl 3 and 0.5ZrCl 4 The molar ratio of 5g of Al powder with an average particle size of less than 15 microns to ScCl 3 Powder and ZrCl 4Powder mix. The material is then placed in a quartz tube and heated at a temperature between room temperature and 900° C. and a pressure below 10 mbar. The temperature was raised in steps at 100° C. and the total heating time was 60 minutes. The material is then discharged and analyzed. The product is made of Al 3 (Sc-Zr) powder composition.

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Abstract

A process for producing an aluminium-scandium based alloy from aluminium and scandium chloride, the process also producing aluminium chloride as a by-product and including the step of reducing scandium chloride in the presence of aluminium in a reaction zone and under reaction conditions which favour production of the aluminium-scandium based alloy.

Description

technical field [0001] The present invention relates broadly to a process for the production of aluminum-scandium based alloys from aluminum and scandium chloride. Background of the invention [0002] The primary application of scandium (Sc) metal is as a minor alloying addition in many aluminum (Al) alloys used in aerospace components and luxury and high-performance sports equipment. Despite the high cost of scandium, its field of application in Al alloys is attracting increasing attention because of the attractive properties it induces when added to these alloys. The use of Al-Sc alloys in the aerospace industry is of particular interest because the addition of Sc improves the weldability of Al alloys. This could allow such alloys to be joined by welding rather than the more expensive riveting techniques currently employed when using such alloys as skin components in aerospace applications. However, expanding the currently limited market for Al-Sc alloys depends on reduc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C22C1/02C22C1/04C22B5/04C22B21/02
CPCC22C1/0416B22F9/20B22F9/22C22B5/04C22B21/0046C22B21/02C22C1/02C22C21/00
Inventor J·海达尔
Owner COMMONWEALTH SCI & IND RES ORG
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