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Method for growing and preparing aluminium borate whisker/ aluminium composite powder on aluminium powder surface in situ

An aluminum borate whisker and in-situ growth technology, which is applied in the field of ceramic whisker/metal composite powder materials, can solve the problem of high preparation temperature of aluminum borate whisker, achieve good continuity and bonding, easy mass production, and simple process Effect

Inactive Publication Date: 2011-09-28
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation temperature of aluminum borate whiskers is often as high as 1000 ° C, which is not suitable for in-situ growth of aluminum matrix composites to obtain materials with good interfacial bonding and excellent composite properties.
However, the powder after pretreatment can produce aluminum borate whiskers inside the aluminum matrix, and the crystallization is good, the growth temperature is suitable for the combination of aluminum matrix, and it is expected to further produce composite materials with excellent performance, but this method has not yet been reported in the literature.

Method used

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  • Method for growing and preparing aluminium borate whisker/ aluminium composite powder on aluminium powder surface in situ
  • Method for growing and preparing aluminium borate whisker/ aluminium composite powder on aluminium powder surface in situ
  • Method for growing and preparing aluminium borate whisker/ aluminium composite powder on aluminium powder surface in situ

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] After weighing 15g of aluminum powder and 1g of boric acid powder and mixing them, the powder and 110g of zirconia balls were added to a 400mL capacity stainless steel ball mill tank, and the prefabricated Mix the powder evenly. Spread the prefabricated mixed powder in the alumina ark, and place the alumina ark in the constant temperature zone in the middle of the quartz heating furnace. The temperature was raised to 650°C for calcination, kept at constant temperature for 2 hours to grow whiskers, and the furnace temperature was naturally lowered to room temperature under the protection of argon, and the product was aluminum borate whiskers / aluminum composite powder.

Embodiment 2

[0017] After weighing 14g of aluminum powder and 1g of boric acid powder and mixing them, the powder and 160g of zirconia balls were added to a 400mL capacity stainless steel ball mill jar, and the prefabricated Mix the powder evenly. Spread the prefabricated mixed powder in the alumina ark, and place the alumina ark in the constant temperature zone in the middle of the quartz heating furnace. Calcined at 700°C, kept at constant temperature for 1.5 hours to grow whiskers, and then the furnace temperature was naturally lowered to room temperature under the protection of argon, and the product was aluminum borate whiskers / aluminum composite powder.

Embodiment 3

[0019] After weighing 12g of aluminum powder and 1g of boric acid powder and mixing them, the powder and 165g of zirconia balls were added to a 400mL capacity stainless steel ball mill tank, and the prefabricated Mix the powder evenly. Spread the prefabricated mixed powder in the alumina ark, and place the alumina ark in the constant temperature zone in the middle of the quartz heating furnace. Calcined at 750°C, kept at constant temperature for 1 hour to grow whiskers, and then the furnace temperature was naturally lowered to room temperature under the protection of argon, and the product was aluminum borate whiskers / aluminum composite powder.

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Abstract

The invention discloses a method for growing and preparing aluminium borate whisker / aluminium composite powder on aluminium powder surface in situ, belonging to the technology of ceramic whisker / metal composite powder materials. The method process comprises the following steps: adding aluminium powder and boric acid powder by mass into a stainless steel jar to be subjected to ball milling to prepare ball milling pre-prepared mixed powder; spreading the ball milling pre-prepared mixed powder in an alumina boat; putting the alumina ark into a quartz heating furnace; and under the protection ofargon, calcining at the temperature of 650-800 DEG C to prepare the product of aluminium borate whisker / aluminium composite powder. The method has the advantage of simple technology and is easy to realize mass production; the size of aluminium borate whisker growing in the aluminite powder matrix is even, and the aluminium borate whisker has favourable associativity with the aluminite powder matrix.

Description

technical field [0001] The invention relates to a method for preparing aluminum borate whisker / aluminum composite powder by in-situ growth on the surface of aluminum powder, which belongs to ceramic whisker / metal composite powder material technology. Background technique [0002] As a commonly used structural material, aluminum metal has many advantages such as high ductility, low density, high specific strength, good casting performance, and recyclable recycling, and has become one of the most widely used materials today. The advancement of composite material technology has promoted the development of the performance of aluminum-based materials, making it a new expansion in the application of aerospace, transportation, construction and other industries. Our country's entry into various international trade organizations and international standard accreditation organizations has made us put forward a more urgent demand for the performance improvement of new aluminum products....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/00C22C47/00C22C47/06C22C101/22
Inventor 赵乃勤于镇洋师春生刘恩佐
Owner TIANJIN UNIV
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