A kind of method for preparing magnesium-lithium alloy coating by precursor polymer

A technology of magnesium-lithium alloy and magnesium alloy, which is applied in the direction of coating, can solve the problems that have not been reported, and achieve the effect of simple equipment, good bonding force and convenient operation

Inactive Publication Date: 2011-12-07
JIAMUSI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no report on the use of ceramic precursors in the preparation of magnesium-lithium coatings

Method used

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  • A kind of method for preparing magnesium-lithium alloy coating by precursor polymer
  • A kind of method for preparing magnesium-lithium alloy coating by precursor polymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1: the preparation method of magnesium-lithium alloy coating

[0026] (a) Surface pretreatment of magnesium-lithium alloy: the experiment uses magnesium-lithium alloy as the base material, and its surface pretreatment process mainly includes: polishing-cleaning-drying, that is, using metallographic sandpaper to remove the black film on the surface of magnesium-lithium alloy, After cleaning, blow dry with cold air.

[0027] (b) Preparation of coating: mix a certain concentration of polysilazane with 10-20% B 4 C powder filler and 10-20% SiC powder are mixed in a ball mill for 3 hours to obtain a uniform slurry.

[0028] (c) Spraying: put the slurry into a spray gun, and evenly spray it on the surface of the surface-treated magnesium-lithium alloy.

[0029] (d) Curing process: Put the sample into a nitrogen furnace and heat it up to 200°C at a rate of 5°C / min, keep it warm for 1 hour, and then cool it down at a rate of 5°C / min.

[0030] (e) Reinforcing treat...

Embodiment 2

[0032] Embodiment 2: the preparation method of magnesium-lithium alloy coating

[0033] (a) Surface pretreatment of magnesium-lithium alloy: the experiment uses magnesium-lithium alloy as the base material, and its surface pretreatment process mainly includes: polishing-cleaning-drying, that is, using metallographic sandpaper to remove the black film on the surface of magnesium-lithium alloy, After cleaning, blow dry with cold air.

[0034] (b) Preparation of coating: mix a certain concentration of polycarbosilane with 15% B 4 C powder filler, 10% SiC powder, 8% SiO 2 The powder was mixed in a ball mill for 5 hours to obtain a homogeneous slurry.

[0035] (c) Brushing: evenly brush the slurry onto the surface of the surface-treated magnesium-lithium alloy.

[0036] (d) Curing process: Put the sample into a vacuum furnace and heat it to 180°C at 5°C / min, keep it warm for 2h, and then cool it down at 5°C / min.

[0037] (e) Strengthening treatment: the prepared sample is coate...

Embodiment 3

[0040] Embodiment 3: the preparation method of magnesium-lithium alloy coating

[0041] (a) Surface pretreatment of magnesium-lithium alloy: the experiment uses magnesium-lithium alloy as the base material, and its surface pretreatment process mainly includes: polishing-cleaning-drying.

[0042] (b) Preparation of coating: mix a certain concentration of polysiloxane with a certain proportion of filler 10-20% Al 2 o 3 Powder, 10-20% SiO 2 The powder was mixed in a ball mill for 4 hours to obtain a homogeneous slurry.

[0043] (c) Brushing: evenly brush the slurry onto the surface of the surface-treated magnesium-lithium alloy.

[0044] (d) Curing process: Put the sample into a vacuum furnace and heat it to 200°C at 3°C / min, keep it warm for 1 hour, and then cool it down at 3°C / min.

[0045] (e) Strengthening treatment: the prepared sample is coated with the precursor solution again, and then placed in a vacuum furnace for curing again.

[0046] After the above steps, the p...

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Abstract

The invention provides a preparation method of a magnesium-lithium alloy surface coating. Using ceramic precursor polymers such as polysilazane, polycarbosilane and polysiloxane as the base material, with fillers such as B4C powder, SiC powder, SiO2 powder, Al2O3 powder and a small amount of additives, the preparation is carried out as follows: 1. Add a certain amount of fillers and additives to the precursor solution, and mix it in a ball mill to form a uniform slurry; 2. Apply the slurry to the surface of the treated magnesium-lithium alloy by brushing or spraying; 3. Put the Put the painted sample into a nitrogen or vacuum furnace, and cure it at 150°C to 200°C for 0.5 to 2 hours; 4. Brush (or spray) and cure the sample to obtain a reinforced coating . The present invention forms a high polymer with a three-dimensional network through the cross-linking reaction of the precursor molecules, and forms a dense coating on the surface of the magnesium-lithium alloy through the addition of fillers. The coating has excellent corrosion resistance and corrosion resistance. Grinding and heat resistance and other properties. The invention is an ideal method for preparing the magnesium-lithium alloy coating with low cost and high benefit, and broadens the application of the magnesium-lithium alloy in the fields of aerospace, automobile, electronics and the like.

Description

technical field [0001] The invention relates to a preparation method of a magnesium-lithium alloy surface protection coating. Background technique [0002] Magnesium-lithium alloy is an alloy composed of magnesium and lithium metal. Generally, it contains more than 15% lithium, and the density is 1.14-1.57g / cm 3 , as the lightest structural material today, its specific strength is higher than that of conventional magnesium alloys, with a strength of 220-340MPa and an elastic modulus of 40GPa. High damping capacity, strong shock absorption ability, good cold and hot processing performance. It is used in the manufacture of aerospace parts and other high-speed rotators. Since the corrosion resistance of magnesium-lithium alloys is worse than that of ordinary magnesium alloys, the poor corrosion resistance is the key to limit the wide application of magnesium-lithium alloys. [0003] Coating technology has always been one of the effective methods to improve the corrosion res...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F15/00C09D183/04C09D183/16C09D7/12
Inventor 刘洪丽王涛潘翠云蔡民孙鹏飞
Owner JIAMUSI UNIVERSITY
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