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Preparation method of supersaturation Mg(Ti) metal solid solution powder

A solid solution and powder technology, applied in the field of supersaturated Mg metal solid solution powder preparation, can solve the problems of insufficient ball milling energy, uneven solid solubility, long ball milling time, etc. The effect of fine powder

Inactive Publication Date: 2017-10-13
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the ball milling pot and balls of the ball mill are mainly made of metal, such as stainless steel pot or hard alloy pot. During ball milling, Mg will adhere to the inner wall of the metal ball mill pot and the metal balls, and powdery samples cannot be obtained. In lumpy samples, only the surface of the sample has Ti solid solution, and there is basically no Ti distribution in the center, and the solid solubility is very uneven
Grinding aids, such as stearic acid, are usually added to avoid large-scale adhesion. Although this can significantly reduce adhesion, it is difficult to complete the amount of grinding aids and cause greater pollution.
Moreover, the energy of traditional ball milling is not high enough, and it takes a long time for ball milling to form a supersaturated solid solution, which will bring pollution to the sample.

Method used

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  • Preparation method of supersaturation Mg(Ti) metal solid solution powder
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A preparation method of supersaturated Mg (Ti) metal solid solution powder, the steps are as follows:

[0031] 1) First put Mg powder and Ti powder into the ball mill tank according to the atomic ratio of Mg:Ti=100:2, the particle size of Mg powder and Ti powder are both less than 100 mesh, the total mass of the two powders is 3g, and then put grinding ball;

[0032] 2) The electrode rod is installed on the cover plate of the ball mill tank, and the cover plate is covered. The electrode rod is located in the middle of the inside of the tank body, and the electrode rod and the outer surface of the ball mill tank are respectively connected to the two poles of the high-voltage AC power supply;

[0033] 3) Use a vacuum pump to evacuate the closed ball mill tank for 5 minutes, then fill it with argon, repeat it 4 times, reduce the water and oxygen content in the ball mill tank, and fill the gas medium for the last time to make the air pressure in the ball mill tank 0.1atm ;...

Embodiment 2

[0041] A preparation method of supersaturated Mg (Ti) metal solid solution powder, the steps are as follows:

[0042] 1) First put Mg powder and Ti powder into the ball mill tank according to the atomic ratio of Mg:Ti=100:5, the particle size of Mg powder and Ti powder are both less than 100 mesh, the total mass of the two powders is 10g, and then put grinding ball;

[0043] 2) The electrode rod is installed on the cover plate of the ball mill tank, and the cover plate is covered. The electrode rod is located in the middle of the inside of the tank body, and the electrode rod and the outer surface of the ball mill tank are respectively connected to the two poles of the high-voltage AC power supply;

[0044] 3) Use a vacuum pump to evacuate the closed ball mill tank for 10 minutes, then fill it with argon, repeat the process twice, reduce the water and oxygen content in the ball mill tank, and fill the gas medium for the last time to make the air pressure in the ball mill tank ...

Embodiment 3

[0051] A preparation method of supersaturated Mg (Ti) metal solid solution powder, the steps are as follows:

[0052] 1) First put Mg powder and Ti powder into the ball mill tank according to the atomic ratio of Mg:Ti=100:3, the particle size of Mg powder and Ti powder are both less than 100 mesh, the total mass of the two powders is 5g, and then put grinding ball;

[0053] 2) The electrode rod is installed on the cover plate of the ball mill tank, and the cover plate is covered. The electrode rod is located in the middle of the inside of the tank body, and the electrode rod and the outer surface of the ball mill tank are respectively connected to the two poles of the high-voltage AC power supply;

[0054] 3) Use a vacuum pump to evacuate the closed ball milling tank for 8 minutes, then fill it with argon, repeat the process 3 times, reduce the water and oxygen content in the ball milling tank, and fill the gas medium for the last time to make the air pressure in the ball mill...

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Abstract

The invention provides a preparation method of supersaturation Mg(Ti) metal solid solution powder. A wall-attaching ball milling manner and a planetary ball milling manner are alternatively used for grinding; and meanwhile, a double-dielectric barrier discharge plasma assisting ball milling manner is additionally used for ball milling of Mg powder and Ti powder for preparing the solid solution powder. According to the Mg(Ti) solid solution powder prepared through the preparation method, the refining degree and the uniformity are greatly improved; meanwhile, the sample ball milling time is further shortened, and the working efficiency is improved; and the method can be further applied to preparation of Mg based metal solid solution powder of other transition elements.

Description

technical field [0001] The invention belongs to the technical field of solid solution powder preparation, and in particular relates to a preparation method of supersaturated Mg(Ti) metal solid solution powder. Background technique [0002] The equilibrium solid solubility of Ti in Mg is only 0.3% atomic ratio. To prepare a supersaturated Mg(Ti) solid solution with a solid solubility higher than this concentration, non-equilibrium methods, such as quenching or high-energy ball milling, must be used. The quenching method requires a high cooling rate, and the quenched product is not a small particle powder. In addition, the saturated vapor pressure of Mg is high. When the sample is mainly Mg, it is not suitable to prepare based on Mg melt, and the ball milling method can directly produce powdered Mg. (Ti) solid solution. [0003] At present, the ball milling pot and balls of the ball mill are mainly made of metal, such as stainless steel pot or hard alloy pot. During ball mill...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/04
CPCB22F9/04B22F2009/043B22F2999/00B22F2202/13
Inventor 黄存可郭进罗红整马树元黄丹
Owner GUANGXI UNIV
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