In-situ synthesized spinel whisker reinforced aluminum-based composite foam and preparation method thereof

A composite foam and in-situ synthesis technology, which is applied in the fields of refractory materials, energy absorption, and sound absorption, can solve the problems of uneven distribution of ceramic phases, poor contact between the matrix interface, etc., and achieve adjustable porosity, controllable process, and simple process Effect

Inactive Publication Date: 2015-09-09
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can effectively overcome the defects of uneven distribution of ceramic pha...

Method used

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  • In-situ synthesized spinel whisker reinforced aluminum-based composite foam and preparation method thereof
  • In-situ synthesized spinel whisker reinforced aluminum-based composite foam and preparation method thereof
  • In-situ synthesized spinel whisker reinforced aluminum-based composite foam and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Get 11.6g of Al powder, 1.56g of Mg powder, 2.4g of boric acid and 0.1g of stearic acid for 11 hours with mechanical ball milling at a speed of 600 rpm, get 6.36g of powder after ball milling, and add 1.5ml of 4% PVA in mass fraction, after grinding Air dry for 1 hour. After mixing the ground powder with 8.18g NaCl evenly, press it into a bulk material at room temperature under a pressure of 300MPa. Then, the temperature was raised to 600° C. at a rate of 10° C. / min in an Ar atmosphere, and kept for 1 hour. After cooling to room temperature with the furnace, the sintered block was placed in a water bath at 80° C. for 24 hours to obtain an aluminum-based composite foam with a porosity of 60%.

Embodiment 2

[0030] Get 11.6g of Al powder, 1.56g of Mg powder, 2.4g of boric acid and 0.1g of stearic acid for 11 hours with mechanical ball milling at a speed of 750 rpm, get 6.36g of powder after ball milling, and add 1.5ml of 4% PVA in mass fraction, after grinding Air dry for 1 hour. After mixing the ground powder with 8.18g NaCl evenly, press it into a bulk material at room temperature under a pressure of 300MPa. Then, the temperature was raised to 600° C. at a rate of 10° C. / min in an Ar atmosphere, and kept for 1 hour. After cooling to room temperature with the furnace, the sintered block was placed in a water bath at 80° C. for 24 hours to obtain an aluminum-based composite foam with a porosity of 60%.

Embodiment 3

[0032] Get 11.6g of Al powder, 1.56g of Mg powder, 2.4g of boric acid and 0.1g of stearic acid for 10 hours with mechanical ball milling at a speed of 750 rpm, get 6.36g of powder after ball milling, and add 1.5ml of 4% PVA in mass fraction, after grinding Air dry for 1 hour. After mixing the ground powder with 8.18g NaCl evenly, press it into a bulk material at room temperature under a pressure of 300MPa. Then, the temperature was raised to 600° C. at a rate of 10° C. / min in an Ar atmosphere, and kept for 1 hour. After cooling to room temperature with the furnace, the sintered block was placed in a water bath at 80° C. for 24 hours to obtain an aluminum-based composite foam with a porosity of 60%.

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PUM

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Abstract

The invention relates to a method for preparing spinel whisker reinforced aluminum-based composite foam by in-situ synthesis. The method comprises the following steps of preparing Al-Mg powder according to the mass ratio of 7.4-16 to 1; dropping PVA (Polyvinyl Alcohol) solution with the mass fraction of 3 to 5 percent into the Al-Mg powder according to the mass-to-volume ratio of 13-14g to 1-2ml, grinding the mixture and drying the mixture under the air condition to obtain composite powder, then uniformly mixing the composite powder and NaCl particles according to the mass ratio of 0.29 to 1.16 and pressing the mixture at room temperature and the pressure of 300 to 400MPa into bulk materials; raising the temperature of the bulk materials to be 600 to 800DEG C at the temperature rise rate of 5 to 10DEG C/Min under the atmosphere of argon gases, sintering the bulk materials at the above temperature for 1 to 4 hours and then cooling the sintered materials along with the furnace to obtain an Al-Mg composite material bulk; cleaning the Al-Mg composite material bulk. The method disclosed by the invention has the advantages that the process of preparing foamed aluminium is simple and controllable, and the porosity is adjustable.

Description

technical field [0001] The invention relates to an in-situ growth MgAl 2 o 4 Spinel whisker reinforced aluminum-based composite foam and its preparation technology are mainly used in energy absorption, sound absorption, refractory materials and other fields. technical background [0002] Aluminum foam is a three-dimensional porous metal material with aluminum or aluminum alloy as the skeleton and a large number of cells. Due to its low density, unique surface effect, volume effect, and excellent mechanical, electrical, thermal and acoustic properties, it is a lightweight structure, energy Absorption and thermal energy management offer enormous potential. [0003] The energy absorption properties of foam materials, manifested by large strains at lower compressive stress levels. This is because it is composed of an aluminum alloy skeleton and a large number of pores, the structure is extremely uneven, the strain lags behind the stress seriously, and there is a large-scale p...

Claims

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Application Information

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IPC IPC(8): C22C1/04C22C1/08C22C1/10C22C21/06C22C32/00
Inventor 师春生郭成李群英赵乃勤刘恩佐何春年
Owner TIANJIN UNIV
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