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Preparation method for ceramic ball enhanced magnesium based composite

A composite material and ceramic ball technology, which is applied in the field of preparation of ceramic ball reinforced magnesium-based composite materials, can solve the problems of segregation of ceramic balls, long time, and product pores, etc. handy effect

Inactive Publication Date: 2018-03-20
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Stirring casting method has complicated operation during stirring, long time and prone to segregation of ceramic balls, uniformity of distribution of ceramic balls in liquid, interface reaction problems, etc.
In addition, during non-vacuum stirring casting, gas is easily introduced during the stirring process, resulting in pores inside the product
At the same time, when using this method to prepare magnesium matrix composites, the volume fraction of the reinforcing phase will be limited

Method used

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  • Preparation method for ceramic ball enhanced magnesium based composite
  • Preparation method for ceramic ball enhanced magnesium based composite

Examples

Experimental program
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Effect test

preparation example Construction

[0024] see figure 1 and figure 2 Shown, the preparation method of ceramic ball reinforced magnesium-based composite material of the present invention, comprises the steps:

[0025] Step 1) Mix ceramic balls and water glass evenly according to a certain ratio, put them into a ceramic tube mold to make a green body, dry the green body in an oven at a temperature of 150-200°C for 1.5-2 hours, and prepare ceramics with a certain strength ball prefabricated body;

[0026] Step 2) Melting the magnesium alloy in a smelting furnace fed with argon gas at a melting temperature of 650-750°C to obtain a molten magnesium alloy;

[0027] Step 3) Put the ceramic ball prefabricated body obtained in step 1) into the hydraulic press mold, and then pour the molten magnesium alloy obtained in step 2) into the hydraulic press mold, pressurize the pressure head and keep the pressure for a certain period of time, and the ceramic ball is reinforced. Magnesium-based composites.

[0028] Step 1) T...

Embodiment 1

[0035] Embodiment 1: magnesium matrix is ​​Mg

[0036] Step 1) Mix ceramic balls and water glass evenly with a mass ratio of 10:1, put them into a ceramic tube mold to make a green body, dry the green body in an oven at 200°C for 1.5 hours, and prepare a certain strength ceramic ball prefabricated body;

[0037] Step 2) Melting the as-cast Mg ingot in a smelting furnace fed with argon gas at a melting temperature of 680°C to obtain molten magnesium;

[0038] Step 3) Put the ceramic ball preform obtained in step 1) into the hydraulic press mold, then pour the molten magnesium obtained in step 2) into the hydraulic press mold, pressurize the pressure head to 30MPa and keep the pressure for 5s, and the ceramic ball is obtained Reinforced magnesium matrix composites. Such as figure 1 As shown, the ceramic balls are evenly distributed.

Embodiment 2

[0039] Embodiment 2: Magnesium substrate is AZ91D magnesium alloy

[0040] Step 1) Mix ceramic balls and water glass evenly with a mass ratio of 10:1, put them into a ceramic tube mold to make a green body, and dry the green body at a temperature of 150°C in an oven for 2 hours to prepare a certain strength Ceramic ball prefabricated body;

[0041] Step 2) melting the as-cast AZ91D magnesium ingot in a smelting furnace fed with argon gas at a melting temperature of 700°C to obtain a molten magnesium alloy;

[0042] Step 3) Put the ceramic ball preform obtained in step 1) into the hydraulic press mold, then pour the molten magnesium alloy obtained in step 2) into the hydraulic press mold, pressurize the pressure head to 25MPa and keep the pressure for 8s, and the ceramic is obtained Ball-reinforced magnesium-based composites. Such as figure 2 As shown, no interfacial reaction occurred during the preparation process.

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Abstract

The invention relates to a preparation method for a ceramic ball enhanced magnesium based composite, and belongs to the field of preparation of structure materials. Ceramic balls and water glass are mixed evenly according to a certain proportion and put into a ceramic tube mold to be made into a blank body, and the blank body is dried in a drying box for a certain time, so that a ceramic ball prefabricated blank body with certain strength is prepared. The obtained ceramic ball prefabricated blank body is put into a hydraulic machine mold, then molten magnesium alloy obtained after melting is poured into the hydraulic machine mold, a press head carries out pressurization, and the pressure is maintained for a certain time, so that the ceramic ball enhanced magnesium based composite is obtained. The preparation method is mainly used for overcoming the defects in the prior art, enables the ceramic balls to be dispersed evenly, does not have interface reaction, is simple in process, is convenient to operate, and is better applied to industrial production.

Description

technical field [0001] The invention relates to the field of preparation of structural materials, in particular to a preparation method of a ceramic ball reinforced magnesium-based composite material. Background technique [0002] Due to the addition of the reinforcement phase, the magnesium-based composite material combines the good properties of the matrix and the reinforcement phase. It has high hardness, high elastic modulus, excellent heat resistance and chemical stability. It is used in aerospace, automobile industry, nuclear industry and other industries. Engineering aspects have been practically applied. At the same time, with the development and progress of technology, the price of magnesium alloys has dropped, and the heavy processing of magnesium-based composite materials has good recycling performance, good wear resistance, and high temperature resistance. These advantages make magnesium-based composites the object of close attention by many researchers. [000...

Claims

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Application Information

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IPC IPC(8): B22D19/02B22D18/02C22C23/00C22C1/10
CPCC22C1/1015C22C1/1036C22C23/00B22D18/02B22D19/02C22C1/1021
Inventor 孙超刘家安刘耀辉杨春雪
Owner JILIN UNIV
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