CoCrNi particle enhanced magnesium matrix composite and preparation method thereof

A particle reinforced, composite material technology, applied in the field of magnesium alloy composite materials, can solve the problems of poor plasticity and strength properties, long production process time, complicated preparation methods, etc., achieve high bending strength, enhance strain resistance, delay The effect of crack propagation

Active Publication Date: 2019-09-24
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the deficiencies of the above-mentioned prior art, the object of the present invention is to provide a CoCrNi particle reinforced magnesium-based composite material to solve the problems of poor plasticity and strength properties of the existing magnesium-based composite materials
[00

Method used

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  • CoCrNi particle enhanced magnesium matrix composite and preparation method thereof
  • CoCrNi particle enhanced magnesium matrix composite and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1) Weigh 2.0g of CoCrNi powder with a size of 100μm in the middle entropy alloy and 98.0g of AZ91 alloy powder with a size of 50μm;

[0026] 2) Put the raw materials weighed in step 1) into a ball mill, add 500g of stainless steel balls, vacuumize and fill with argon, repeat two or three times and then carry out ball milling at a speed of 50r / min. After 2 hours of ball milling, the powder is mixed evenly to obtain a mixed powder;

[0027] 3) Put the mixed powder obtained in step 2) into SPS equipment for sintering, raise the temperature to 500°C at a heating rate of 50°C / min, keep it warm for 10 minutes, then cool it down to room temperature at 50°C / min, and finally obtain a magnesium-based composite material , and then the composite material is made into a sample to obtain a prefabricated sample.

[0028] The magnesium-based composite material obtained in this embodiment is observed under a scanning electron microscope, and the results are as follows: figure 1 shown. ...

Embodiment 2

[0031] 1) Weigh 5.0g of CoCrNi powder with a size of 200μm of medium entropy alloy and 95.0g of AZ91 alloy powder with a size of 60μm;

[0032] 2) Put the raw materials weighed in step 1) into a ball mill, add 500g of stainless steel balls, vacuumize and fill with argon, repeat two or three times and then carry out ball milling at a speed of 50r / min. After 2 hours of ball milling, the powder is mixed evenly to obtain a mixed powder;

[0033] 3) Put the mixed powder obtained in step 2) into SPS equipment for sintering, raise the temperature to 500°C at a heating rate of 50°C / min, and keep it at a pressure of 75MPa for 10 minutes, then cool it down to room temperature at 50°C / min, and finally obtain magnesium After the composite material is made into a sample, a prefabricated sample is obtained.

Embodiment 3

[0035] 1) Weigh 10.0g of CoCrNi powder with a size of 120μm of medium entropy alloy and 90.0g of AZ91 alloy powder with a size of 70μm;

[0036] 2) Put the raw materials weighed in step 1) into a ball mill, add 500g of stainless steel balls, vacuumize and fill with argon, repeat two or three times and then carry out ball milling at a speed of 50r / min. After 2 hours of ball milling, the powder is mixed evenly to obtain a mixed powder;

[0037] 3) Put the mixed powder obtained in step 2) into SPS equipment for sintering, raise the temperature to 500°C at a heating rate of 50°C / min, and keep it at a pressure of 75MPa for 10 minutes, then cool it down to room temperature at 50°C / min, and finally obtain magnesium After the composite material is made into a sample, a prefabricated sample is obtained.

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Abstract

The invention discloses a CoCrNi particle enhanced magnesium matrix composite and a preparation method thereof. The CoCrNi particle enhanced magnesium matrix composite comprises the following components in percentage by mass: 2%-15% of CoCrNi alloy powder and the balance of Mg powder and magnesium alloy powder. The high-performance CoCrNi particle enhanced magnesium matrix composite is prepared by adopting a sintering technology of a discharge plasma furnace; in the composite, CoCrNi particles can be uniformly distributed on a magnesium matrix, the bonding force of CoCrNi and the magnesium matrix is high, no reactants are generated when CoCrNi reacts with the magnesium matrix, the interface between the composites is not polluted, and the crack propagation in the magnesium alloy can be effectively delayed. The CoCrNi particles have relatively high plasticity, and can induce the formation of nanometer twins under the stress, and the fracture toughness, the strength, the plasticity and the strain strength of the magnesium matrix composite are enhanced. The preparation method is simple and easy to operate, the device is simple and convenient to operate, raw materials are cheap and easy to obtain, the cost is low, the industrial mass production is realized easily, and the application prospect is good.

Description

technical field [0001] The invention relates to the technical field of magnesium alloy composite materials, in particular to a CoCrNi particle-reinforced magnesium-based composite material and a preparation method thereof. Background technique [0002] At present, with the rapid development of my country's industry, there are higher and higher requirements for the application of materials. As a lightweight structural material, magnesium alloy has a series of properties such as low density, high specific strength, and high specific modulus. specialty. Therefore, as a new type of metal matrix composite material with excellent comprehensive performance, magnesium matrix composite material has great application prospects in high-tech fields such as aerospace, communication equipment, machinery manufacturing and automobile industry. However, with the rapid development of the manufacturing industry, various application fields have put forward higher requirements for the performanc...

Claims

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Application Information

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IPC IPC(8): C22C23/00C22C1/04B22F9/04
CPCB22F9/04B22F2009/041C22C1/0408C22C23/00
Inventor 陈先华吴波李建波叶俊镠鲁小芳潘复生
Owner CHONGQING UNIV
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