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AI-Zr-B-O reacting system for synthesizing high-performance aluminium-base copmosite material in-situ and synthetic material thereof

A technology of in-situ composite materials and aluminum-based composite materials, which is applied in the field of reaction systems for new synthetic composite materials, can solve the problems of high initial reaction temperature and deterioration of aluminum liquid, etc., and achieve the effects of stable reaction, clean interface and wide source.

Active Publication Date: 2008-03-26
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current reaction system is only focused on the Al-Ti-X (Al-Ti-O, Al-Ti-B, Al-Ti-C) system, and the initial reaction temperature of this system is high, often higher than 1100 ° C, or even higher than 1200℃, serious deterioration of molten aluminum

Method used

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  • AI-Zr-B-O reacting system for synthesizing high-performance aluminium-base copmosite material in-situ and synthetic material thereof
  • AI-Zr-B-O reacting system for synthesizing high-performance aluminium-base copmosite material in-situ and synthetic material thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1: The metal aluminum in the crucible is melted by heating to 850° C. in a resistance furnace. After the molten aluminum is refined and left to stand, the zirconia (ZrO 2 ) and boron oxide (B 2 o 3 ) powder (the purity of the powder is 99%, and the average particle size is 80 μm) mixed and stirred evenly, wherein ZrO 2 , B 2 o 3 According to Zr, B molar ratio 1:1 mixed. Then preheat at 200° C. for 2 hours, and use a pneumatic conveying method to feed into the molten aluminum liquid through a catheter for reaction, thereby forming an Al-Zr-B-O reaction system. During the transportation process, argon is used as a protective gas, and a graphite stirring rod is used for stirring at the same time. After the Al-Zr-B-O reaction system was fully reacted for 30 minutes, it was refined with nitrogen for 8 minutes, and then poured into a metal mold to prepare (ZrAl 3 +ZrB 2 +Al 2 o 3 ) particle-reinforced aluminum-based composite material, wherein the overall...

Embodiment 2

[0017] Embodiment 2: Heating to 870° C. in a resistance furnace to melt the metal aluminum in the crucible. After the molten aluminum is refined and left to stand, the zirconia (ZrO 2 ) and potassium fluoroborate (KBF 4 ) powder (the purity of the powder is 99%, and the average particle size is 80 μm) mixed and stirred evenly, wherein ZrO 2 、KBF 4 According to Zr, B molar ratio 1:2 mixed. Then preheat at 200° C. for 2 hours, and use a pneumatic conveying method to feed into the molten aluminum liquid through a catheter for reaction, thereby forming an Al-Zr-B-O reaction system. During the transportation process, argon is used as a protective gas, and a graphite stirring rod is used for stirring at the same time. After the Al-Zr-B-O reaction system was fully reacted for 30 minutes, it was refined with nitrogen for 8 minutes, and then poured into a metal mold to prepare (ZrAl 3 +ZrB 2 +Al 2 o 3 ) particle-reinforced aluminum-based composite material, wherein the overall ...

Embodiment 3

[0018] Embodiment 3: The A356 alloy in the crucible is melted by heating to 890° C. in a resistance furnace. After refining the molten A356 alloy and standing still, the zirconium silicate (ZrSiO 4 ) and boron oxide (KBF 4 ) powder (purity 99%, average particle size 80μm) mixed and stirred evenly, ZrSiO 4 、KBF 4 According to Zr, B molar ratio 1:2 mixed. Then preheat at 200° C. for 2 hours, and use the pneumatic conveying method to feed the A356 alloy melt into the molten A356 alloy for reaction, thereby forming an Al-Zr-B-O reaction system. During the transportation process, argon is used as a protective gas, and a graphite stirring rod is used for stirring at the same time. After the Al-Zr-B-O reaction system was fully reacted for 30 minutes, it was refined with nitrogen for 8 minutes, and then poured into a metal mold to prepare (ZrAl 3 +ZrB 2 +Al 2 o 3 ) particle-reinforced A356 alloy-based composite material, the total volume fraction of reinforcing particles is 8....

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Abstract

The invention has provided a Al-Zr-B-O reaction system which can synthesis the high performance aluminium base in situ composite. In the 800-900 deg.C Al or Al-alloy fusant, we can addinto the mixture of Zr and B oxidation or salt which is 5-25% Al or al-alloy fusant. The Al-Zr-B-O reaction system solidify to the high performance aluminium base composite which insist of Al3Zr, ZrB2, Al2O3-15%, and Al or Al-ally. The initial temperature for the reaction for the reaction of Al-Zr-B-O system is obviously lower than the Al-Ti-O system. The new (Al3Zr+Al2O2+ZrB2) / Al and the (Al3Zr+Al2O3+ZrB2) / A356 have the good performance of mechanics, physics and wear resistant.

Description

technical field [0001] The invention relates to a novel reaction system for synthesizing composite materials, in particular to an Al-Zr-B-O reaction system for synthesizing high-performance aluminum-based in-situ composite materials and a new material thereof. Background technique [0002] In recent years, reactive synthesis technology (Reactive synthesis) has been widely used in the preparation of metal matrix in situ composites (In-situ composites). In this method, because the reinforcement is a thermodynamically stable phase that nucleates and grows in situ from the metal matrix, there is no pollution on the surface of the reinforcement, and the problem of poor compatibility with the matrix is ​​avoided, and the interface bonding strength is high, so it is known as In recent years, it has become a new hotspot in the research of metal matrix (especially aluminum matrix) composite materials. [0003] Since the in-situ composite material is prepared through appropriate reac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/02C22C21/00
Inventor 赵玉涛程晓农戴起勋陈刚
Owner JIANGSU UNIV
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