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Ceramic particle enhanced magnesium-based composite material and preparation method thereof

A composite material and ceramic particle technology, applied in the field of materials, can solve the problems of reduced infiltration rate, increased process cost, poor wettability, etc., and achieves the effects of improved wear resistance, improved wettability, and enhanced strength

Inactive Publication Date: 2014-04-16
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In general, the wettability between ceramic and metal systems is not very good, which will lead to a significant reduction in the infiltration rate, or even the infiltration process cannot occur
Increasing the infiltration temperature is a method to solve the wettability of ceramic-metal melts; generally speaking, increasing the temperature has a certain effect on improving the wettability, but for low melting point metals like magnesium, the melt immersion A small increase in the infiltration temperature will intensify the rapid volatilization of the magnesium metal melt, which not only increases the process cost, but also makes the preparation process impossible.

Method used

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  • Ceramic particle enhanced magnesium-based composite material and preparation method thereof
  • Ceramic particle enhanced magnesium-based composite material and preparation method thereof
  • Ceramic particle enhanced magnesium-based composite material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0039] A preparation method of ceramic particle reinforced magnesium-based composite material, the steps are as follows:

[0040] 1. Take B with an average particle size of 28 μm 4 C powder, Ti powder with an average particle size ≤ 25 μm and binder liquid natural rubber are mechanically mixed to obtain a mixed powder; wherein, the amount of Ti powder is Ti powder and B 4 8% of the total volume of C powder, the amount of binder is Ti powder and B 4 5% of the total volume of powder C;

[0041] 2. Use a press to cold-press the mixed powder into a ceramic prefabricated block with a density of 60%;

[0042] 3. Take a pure magnesium ingot with the same size as the ceramic prefabricated block, put the two into the graphite mold, the magnesium ingot is located above the ceramic prefabricated block, and the size of the contact surface between the two is the same;

[0043] 4. Put the graphite mold equipped with ceramic prefabricated blocks and magnesium ingots into the constant temp...

Embodiment 2

[0047] A preparation method of ceramic particle reinforced magnesium-based composite material, the steps are as follows:

[0048] 1. Take B with an average particle size of 10 μm 4 C powder, Ti powder with an average particle size ≤ 25 μm and binder liquid natural rubber are mechanically mixed to obtain a mixed powder; wherein, the amount of Ti powder is Ti powder and B 4 7% of the total volume of C powder, the amount of binder is Ti powder and B 4 8% of the total volume of powder C;

[0049] 2. Use a press to cold-press the mixed powder into a ceramic prefabricated block with a density of 55%;

[0050] 3. Take a pure magnesium ingot with the same size as the ceramic prefabricated block, put the two into the graphite mold, the magnesium ingot is located above the ceramic prefabricated block, and the size of the contact surface between the two is the same;

[0051] 4. Put the graphite mold equipped with ceramic prefabricated blocks and magnesium ingots into the constant temp...

Embodiment 3

[0055] A preparation method of ceramic particle reinforced magnesium-based composite material, the steps are as follows:

[0056] 1. Take B with an average particle size of 5 μm 4 C powder, Ti powder with an average particle size ≤ 25 μm and binder liquid natural rubber are mechanically mixed to obtain a mixed powder; wherein, the amount of Ti powder is Ti powder and B 4 6% of the total volume of C powder, the amount of binder is Ti powder and B 4 10% of the total volume of powder C;

[0057] 2. The mixed powder is unidirectionally cold-pressed into a ceramic prefabricated block with a density of 50% by a press;

[0058] 3. Take a pure magnesium ingot with the same size as the ceramic prefabricated block, put the two into the graphite mold, the magnesium ingot is located above the ceramic prefabricated block, and the size of the contact surface between the two is the same;

[0059] 4. Put the graphite mold equipped with ceramic prefabricated blocks and magnesium ingots into...

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Abstract

A method for preparing a magnesium-based composite material through a metal melt pressureless infiltration ceramic precast block is a preparation method which is low in cost, rapid and high-efficiency and realizes final forming. Because the wettability between ceramics and a metal system is low, the infiltration process is difficultly performed even cannot be performed. The invention provides a ceramic particle enhanced magnesium-based composite material and a preparation method thereof aiming at the problems. A small amount of the third-phase component metal Ti which has high melting point and is immiscible with a magnesium melt is added into the ceramic precast block to serve as a magnesium melt infiltration inducer, the wettability of a B4C / Mg composite material system is effectively improved, and a B4C / Mg series ultra-light wear-resistant ceramic particle enhanced magnesium-based composite material is prepared. The method comprises the following steps: mechanically and uniformly mixing B4C powder, Ti powder and an adhesive, performing cold pressing to prepare a ceramic precast block, putting the ceramic precast block and a pure magnesium ingot into an electric furnace for heating, melting the pure magnesium ingot, infiltrating the magnesium ingot into pores of the ceramic precast block, and preparing the ceramic particle enhanced magnesium-based composite material.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to an ultra-light and highly wear-resistant magnesium-based composite material and a preparation method thereof. Background technique [0002] Materials are the foundation and forerunner of science and social progress, and a milestone of human progress. However, in the past 40 years, the rapid development of science and technology, especially the development of cutting-edge technologies such as aerospace and automobiles, has put forward more and more stringent requirements on the performance of materials, and traditional single materials can no longer meet these requirements. At this time, the emergence of composite materials has become an inevitable trend in the application and development of single materials such as metals and ceramics, and it is also a comprehensive sublimation of the properties of various single materials. [0003] Metal matrix composites are comp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C32/00C22C23/00C22C1/05C22C1/10
Inventor 陈礼清姚彦桃
Owner NORTHEASTERN UNIV
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