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Preparation method of nano-alumina reinforced aluminum-based composite material coated with spinel in situ

A nano-alumina, in-situ coating technology, applied in metal material coating process, solid-state diffusion coating, coating and other directions, can solve the problem of lack of preparation method of aluminum matrix composite materials, and achieve controllable grain boundary structure characteristics , the effect of synergistic improvement of strength and plasticity, and high coverage

Active Publication Date: 2021-11-19
XINYU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The present invention is to provide a preparation method of nano-alumina reinforced aluminum matrix composite material coated with spinel in situ, so as to solve the problem that there is still a lack of an effective preparation method of aluminum matrix composite material

Method used

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  • Preparation method of nano-alumina reinforced aluminum-based composite material coated with spinel in situ
  • Preparation method of nano-alumina reinforced aluminum-based composite material coated with spinel in situ

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] After the 80nm aluminum oxide is kept at 600°C for 1 hour, it is dispersed in the trisodium citrate solution under the action of 150W and 40kHz ultrasound, wherein the molar ratio of trisodium citrate to nano-alumina is 0.001, and the ultrasonic dispersion is 40 minutes; Add stannous chloride in the hydrochloric acid of 0.4mol / L, continue to add sodium chloride after being completely dissolved, then add the nano-alumina suspension obtained above, wherein the molar ratio of nano-alumina, stannous chloride and sodium chloride It is 1:1:4, and magnetic stirring is applied for 30min simultaneously; Palladium chloride is added in the hydrochloric acid of 0.7mol / L, and mixes with the mixed suspension obtained in the above, wherein the concentration of palladium chloride in hydrochloric acid solution is 0.02mol / L, the molar ratio of palladium chloride to nano-alumina is 0.01, magnetically stirred for 10min, and left to stand, after the powder is precipitated, the upper layer m...

Embodiment 2

[0052] After the 100nm aluminum oxide was kept at 700°C for 1 hour, it was dispersed in the trisodium citrate solution under the action of 200W and 40kHz ultrasound, wherein the molar ratio of trisodium citrate to nano-alumina was 0.002, and the ultrasonic dispersion was 50 minutes; Add stannous chloride in the hydrochloric acid of 0.5mol / L, continue to add sodium chloride after being completely dissolved, then add the nano-alumina suspension obtained above, wherein the molar ratio of nano-alumina, stannous chloride and sodium chloride It is 1:1:5, and magnetic stirring is applied for 30min simultaneously; Palladium chloride is added in the hydrochloric acid of 0.7mol / L, and mixed with the mixed suspension obtained in the above, wherein the concentration of palladium chloride in hydrochloric acid solution is 0.03mol / L, the molar ratio of palladium chloride to nano-alumina is 0.02, magnetically stirred for 10min, and left to stand, after the powder is precipitated, the upper la...

Embodiment 3

[0054] After the 100nm aluminum oxide was kept at 700°C for 1 hour, it was dispersed in the trisodium citrate solution under the action of 250W and 40kHz ultrasound, wherein the molar ratio of trisodium citrate to nano-alumina was 0.003, and the ultrasonic dispersion was 60 minutes; Add stannous chloride in the hydrochloric acid of 0.7mol / L, continue to add sodium chloride after being completely dissolved, then add the nano-alumina suspension obtained above, wherein the molar ratio of nano-alumina, stannous chloride and sodium chloride Be 1:1:6, apply magnetic stirring 50min simultaneously; Palladium chloride is joined in the hydrochloric acid of 0.8mol / L, and mixes with the mixed suspension obtained in above-mentioned, wherein the concentration of palladium chloride in hydrochloric acid solution is 0.03mol / L, the mol ratio of palladium chloride to nano-alumina is 0.02, magnetically stirred for 20min, and left to stand, after the powder is precipitated, the upper layer mixed s...

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Abstract

The invention relates to a preparation method of a nano-alumina reinforced aluminum-based composite material coated with spinel in situ. The preparation method comprises the following steps that firstly, nano-alumina coated with the spinel in situ is prepared, then an aluminum alloy and powder are put into a crucible, heating is achieved to 800-850 DEG C at a certain rate, and the temperature is kept for 30-50 minutes; ultrasonic vibration is introduced into a metal melt and kept; the composite melt is poured into a preheated mold, and an as-cast composite material is obtained; 5-10% of one-way compression is performed every 90-degree rotation in the same direction at the deformation rate of 0-5 mm / min, and circulation is performed for 1-3 times; and the as-cast composite material is put into a heat preserving furnace, heating is achieved to 250-500 DEG C at the heating rate of 15-20 DEG C / min, heat preservation is achieved for 1-3 hours, and cooling with water is achieved to obtain the nano-alumina reinforced aluminum-based composite material coated with the spinel in situ. The preparation method of the nano-alumina reinforced aluminum-based composite material coated with the spinel in situ has the characteristics of being easy to operate, safe, effective, low in cost, controllable in quality and the like.

Description

technical field [0001] The invention belongs to the field of metal material preparation, and specifically relates to a method for preparing a nano-alumina-reinforced aluminum-based composite material coated with spinel in situ. Background technique [0002] In recent years, due to its high specific strength, wear resistance, high temperature resistance, creep resistance and other characteristics, particle reinforced aluminum matrix composites have attracted great attention and are widely used in aerospace, rail transit, automobile manufacturing, electronic instruments and other fields . [0003] Ceramic particles, such as alumina, silicon carbide, magnesium oxide, boron carbide, etc., are widely used to strengthen aluminum alloy materials. Because these materials have the characteristics of high temperature resistance, high hardness, high compressive strength, and wear resistance, they are more suitable as reinforcements for matrix materials. The nano-scale reinforcement c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/10C22C1/02B22F1/02C23C8/10
CPCC22C1/1036C22C1/101C23C8/10C22C1/1047
Inventor 陈小会张发云饶森林刘磊
Owner XINYU UNIV