Method for preparing spinel whisker/aluminum composite block material by in-situ growth in aluminum matrix

A technology of in-situ growth and bulk materials, which is applied in the field of ceramic whisker/metal composite material preparation to achieve the effects of stable yield, uniform distribution, improved hardness and wear resistance

Inactive Publication Date: 2010-12-15
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Directly grow considerable spinel whiskers inside the aluminum matrix by the internal in situ reaction method and can be applied to actual production. This method has not been reported in the literature so far.

Method used

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  • Method for preparing spinel whisker/aluminum composite block material by in-situ growth in aluminum matrix
  • Method for preparing spinel whisker/aluminum composite block material by in-situ growth in aluminum matrix
  • Method for preparing spinel whisker/aluminum composite block material by in-situ growth in aluminum matrix

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Take 2.4g of magnesium powder, 2.4g of boric acid powder, and 10.8g of aluminum powder and mix evenly; add the mixed powder and 156g of zirconia balls into a stainless steel ball mill jar with a capacity of 400mL, and perform high-energy grinding on a planetary ball mill at a speed of 650 rpm. After ball milling for 12 hours, a ball milled prefabricated powder was obtained. Add 8.4g of aluminum powder to the ball-milled prefabricated powder and perform mechanical mixing to obtain a completely mixed powder, so that the magnesium powder accounts for 10% of the mass of the completely mixed powder.

[0018] Put the completely mixed powder into a cylindrical steel mold and press it into a block with a diameter of 20mm, and the pressing pressure is 650MPa. Place the pressed block material in the constant temperature zone in the middle of the quartz reaction furnace protected by argon, and then raise the temperature to 800°C at a rate of 10°C / min, and keep it at constant tempe...

Embodiment 2

[0020] Take 2.4g of magnesium powder, 1.2g of boric acid powder, and 10.8g of aluminum powder and mix evenly; add the mixed powder and 144g of zirconia balls into a stainless steel ball mill jar with a capacity of 400mL, and perform high-energy grinding on a planetary ball mill at a speed of 700 rpm. After ball milling for 12 hours, a ball milled prefabricated powder was obtained. Add 19.88g of aluminum powder to the ball-milled prefabricated powder and perform mechanical mixing to obtain a completely mixed powder, so that the magnesium powder accounts for 7% of the mass of the completely mixed powder.

[0021] Put the completely mixed powder into a cylindrical steel mold and press it into a block with a diameter of 20mm, and the pressing pressure is 600MPa. Place the pressed block material in the constant temperature zone in the middle of the quartz reaction furnace protected by argon, and then raise the temperature to 750°C at a rate of 10°C / min, and keep it at constant temp...

Embodiment 3

[0023] Take 3.6g of magnesium powder, 1.2g of boric acid powder, and 9.6g of aluminum powder and mix evenly; add the mixed powder and 288g of zirconia balls into a stainless steel ball mill jar with a capacity of 400mL, and perform high-energy grinding at a speed of 800 rpm on a planetary ball mill. After ball milling for 10 hours, a ball milled prefabricated powder was obtained. Add 3.6g of aluminum powder to the ball-milled prefabricated powder and perform mechanical mixing to obtain a completely mixed powder, so that the magnesium powder accounts for 20% of the mass of the completely mixed powder.

[0024] Put the completely mixed powder into a cylindrical steel mold and press it into a block with a diameter of 20mm, and the pressing pressure is 500MPa. Place the pressed block material in the constant temperature zone in the middle of the quartz reaction furnace protected by argon, and then raise the temperature to 750°C at a rate of 5°C / min, and keep it at constant tempera...

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Abstract

The invention discloses a method for preparing a spinel whisker/aluminum composite block material by in-situ growth in an aluminum matrix. The process of the method comprises the following steps: mixing aluminum powder, magnesium powder and boric acid powder and adding to a stainless steel jar mill with zirconium oxide balls for ball milling pretreatment; after adding the aluminum powder to the ball milling prepared powder, mechanically mixing to prepare fully mixed powder, and adding the fully mixed powder to a mold for pressure molding under certain pressure; and putting the molded block into a quartz heating furnace, and calcining at constant temperature under argon shield to obtain the spinel whisker/aluminum composite block material. The method has simple process, the spinel whisker in the aluminum matrix simultaneously grows in situ in the block sintering process, the whisker and the matrix combine tightly, the production rate of the whisker is stable, the whisker is distributed evenly in the aluminum matrix, the hardness and wear resistance of the whisker/aluminum composite block material are obviously improved, and the whisker/aluminum composite block material has good over-all properties.

Description

technical field [0001] The invention relates to a method for preparing a spinel whisker / aluminum composite block material by in-situ growth in an aluminum matrix, which belongs to the preparation technology of ceramic whisker / metal composite materials. Background technique [0002] Aluminum metal is one of the most commonly used structural materials. It has irreplaceable advantages such as low density, high specific strength and good casting performance. It can be recycled and recycled. It is the most developed metal material in the new century. With the advancement of composite material technology, aluminum matrix composite materials are more widely used in transportation, military applications, aerospace, construction and other industries. Aluminum matrix composites are a mixture of aluminum or aluminum alloy as the matrix and other metal or non-metal particles, ceramic whiskers or fibers as the reinforcing phase. It has the advantages of high specific strength, high wear ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C47/00C22C49/06C22C101/22
Inventor 赵乃勤于镇洋师春生刘恩佐
Owner TIANJIN UNIV
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