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Method for preparing porous magnesium-expansion perlite or porous AZ91 magnesium alloy-expansion perlite composition material

A technology of expanded perlite and AZ91, which is applied in the field of preparation of porous magnesium-expanded perlite or porous AZ91 magnesium alloy-expanded perlite composite materials, can solve the problems of hidden corrosion hidden by inorganic release agents, and achieve no hidden dangers of corrosion , strong operability, and low energy consumption for coating

Active Publication Date: 2009-12-16
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using organic paraffin as a release agent instead of an inorganic release agent can solve the problem of hidden corrosion problems caused by the use of an inorganic release agent during the composite process of magnesium alloys and natural porous glass

Method used

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  • Method for preparing porous magnesium-expansion perlite or porous AZ91 magnesium alloy-expansion perlite composition material
  • Method for preparing porous magnesium-expansion perlite or porous AZ91 magnesium alloy-expansion perlite composition material
  • Method for preparing porous magnesium-expansion perlite or porous AZ91 magnesium alloy-expansion perlite composition material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Commercially available magnesium ingots and expanded perlite with a purity of 99.5% are used as raw materials, and chemically pure solid paraffin, liquid paraffin and petroleum ether are used as coating materials. The large and small particles of expanded perlite are directly processed without screening. Use, the particle size distribution interval of the particles is 8-60 mesh; solid paraffin and liquid paraffin are mixed uniformly according to the ratio of 45g of solid paraffin corresponding to 55g of liquid paraffin, and the composition is a mixed wax of 45wt% solid paraffin-55wt% liquid paraffin system; take 50g of the mixed wax in the mixed wax system and dilute it with 200ml of petroleum ether, then pour the diluted solution of the mixed wax on the top of the expanded perlite, and the bottom of the expanded perlite is a filter screen for unnecessary dilution The excess diluent flowing through the screen is quickly stored in an airtight container to avoid volatiliza...

Embodiment 2

[0029] All the other are with embodiment 1. The differences are: ① 50g of mixed wax is diluted with 1000ml of petroleum ether; ②The thousand grain weight of coated expanded perlite particles is 0.36g; ③The storage time at room temperature for film formation is 20 minutes; ④The seepage temperature is 680°C; The absolute density is 0.945g / cm 3 ; ⑥The relative density of the composite material is 0.54; ⑦When the strain is 2%, the corresponding stress is 12.5MPa; ⑧The corresponding stress when the strain is 20% is 22.1MPa.

Embodiment 3

[0031] All the other are with embodiment 1. The differences are: ① 50g of mixed wax is diluted with 600ml of petroleum ether; ②The thousand grain weight of the film-coated expanded perlite particles is 0.51g; ③The storage time at room temperature for film formation is 30 minutes; ④The seepage temperature is 750°C; The absolute density is 0.88g / cm 3 ; ⑥ The relative density of the composite material is 0.50; ⑦ When the strain is 2%, the corresponding stress is 11MPa; ⑧ When the strain is 20%, the corresponding stress is 21MPa.

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Abstract

The invention relates to a preparation method of a porous magnesium-expanded perlite or porous AZ91 magnesium alloy-expanded perlite composite material, in particular to a method using paraffin as an isolation through-hole agent, using open-pored perlite as a support, and using a vacuum The infiltration means makes the metal magnesium or magnesium alloy infiltrate into the gap of the support to prepare the metal-inorganic non-metallic composite material. Using solid paraffin, liquid paraffin and petroleum ether as raw materials to treat the surface of perlite, using the reducing atmosphere generated by cracking and carbonization, the reaction between perlite, known as natural foam glass, and Mg to form Mg2Si is isolated. The organic matter is used as an isolating agent, which solves the problems of burying hidden dangers of corrosion by using an inorganic isolating agent in the process of preparing porous magnesium or foamed magnesium composite materials by compounding metal Mg or AZ91 magnesium alloy and natural porous glass. The absolute density range of the obtained composite material is 0.79g / cm3-1.01g / cm3, and the relative density range is 0.45-0.56.

Description

Technical field: [0001] The present invention relates to a kind of preparation method of porous magnesium-expanded perlite or porous AZ91 magnesium alloy-expanded perlite composite material, especially relates to a kind of using paraffin as isolation perlite agent, open-pored perlite as support body, using vacuum The infiltration means makes the metal magnesium or its alloy infiltrate into the gap of the support to prepare the metal-inorganic non-metallic composite material. Background technique: [0002] Porous metals and porous glasses have complementary advantages. Porous glass, such as foam glass, has excellent corrosion resistance, stability and long service life in high-salt marine environment and high-humidity underground environment, but the disadvantage is that it still has the brittleness of glass. Porous metals, such as foamed aluminum, have the ductility, certain strength and light weight of metals, but the disadvantages are that their corrosion resistance and s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/08B22D23/04
Inventor 吴耀明王立民董龙祥廖文娟杨洁王立东张洪杰
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI