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

13 Cites 2 Cited by

AI-Extracted 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 stirr...

Method used

Step 3) the ceramic ball prefabricated body obtained by step 1) is put into the hydraulic press mould, then the molten magnesium alloy obtained by step 2) is poured into the hydraulic press mould, the pressure h...

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.

Technology Topic

CeramicMagnesium alloy +1

Image

Examples

Experimental program(5)

Example Embodiment

[0024] See figure 1 and figure 2 As shown, the preparation method of the ceramic ball reinforced magnesium-based composite material of the present invention includes the following steps:

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

[0026] Step 2) The magnesium alloy is smelted in a smelting furnace fed with argon gas, and the melting temperature is 650-750°C to obtain molten magnesium alloy;

[0027] Step 3) Put the ceramic ball preform 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. The indenter is pressurized and held for a certain period of time, and the ceramic ball is strengthened Magnesium-based composite materials.

[0028] Step 1) The ceramic ball is Al 2 O 3 , SiO 2 , SiC.

[0029] Step 1) The diameter of the ceramic pellets is 0.5mm-4mm.

[0030] Step 1) The water glass is obtained by mixing commercially available water glass and distilled water in a volume ratio of 1.5:1.

[0031] Step 1) According to a certain ratio of ceramic balls and water glass, the mass ratio of ceramic balls and water glass is 10:1.

[0032] Step 1) The specifications of the ceramic tube mold are unified with the specifications of the hydraulic press mold.

[0033] Step 2) The magnesium alloy is Mg, Mg-Al series, Mg-Re, Mg-Al-Re series.

[0034] Step 3) The indenter is pressurized and maintained for a certain period of time: the indenter pressure is 20-30 MPa, and the pressure-holding time is 5-10s.

Example Embodiment

[0035] Example 1: The magnesium matrix is Mg

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

[0037] Step 2) Smelting the as-cast Mg ingot in a smelting furnace fed with argon at a smelting 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, and then pour the molten magnesium obtained in step 2) into the hydraulic press mold, press the pressure head to 30 MPa and hold the pressure for 5 seconds to obtain the ceramic ball Reinforce magnesium-based composite materials. Such as figure 1 As shown, the ceramic balls are evenly distributed.

Example Embodiment

[0039] Example 2: The magnesium matrix is AZ91D magnesium alloy

[0040] Step 1) Mix the ceramic balls and water glass with a mass ratio of 10:1, and put them into a ceramic tube mold to make a green body. The green body is dried in an oven at a temperature of 150°C 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 smelting temperature of 700°C to obtain a molten magnesium alloy;

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

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Classification and recommendation of technical efficacy words

evenly distributed

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

AI-Extracted Technical Summary

Problems solved by technology

Method used

Abstract

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Examples

Example Embodiment

Example Embodiment

Example Embodiment

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Description & Claims & Application Information

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