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

An in-situ growth technology for aluminum borate whiskers, which is applied in the field of ceramic whiskers/metal composite powder materials, can solve the problem of high temperature for preparing aluminum borate whiskers, and achieves good continuity and bonding, simple process and low cost. Effect

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

AI Technical Summary

Benefits of technology

This new method allows for better dispersion of fine particles (AlB) within an alloyed metal material during manufacturing processes that require high temperature processing such as casting or welding. By growing tiny crystals onto this surface, these small particles can be easily mixed into another part without losing their original shape due to gravity' interaction between them. These methods allow for efficient use of expensive materials while maintaining excellent properties like strength at elevated temperatures.

Problems solved by technology

This patents describes different methods for producing strong alloys (Al) based upon metathesis chemistry called liquid-liquid copper exchange). These technologies allow for precise control over composition parameters during manufacturing processes like injection moldings, extrusion forming, hot rolling, cold rollforming, etc., resulting in improved mechanical property quality and durability compared to traditional methods. Additionally, these technical means include developing novel reinforce phases within the aluminate matrix, creation of intermediate phases between them, and combining them together through sinter ingots.

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 of argon, 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

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Claims

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Application Information

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Owner TIANJIN UNIV
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