Method for preparing carbon nanotube enhanced magnesium-based composite material
A technology of carbon nanotubes and composite materials, applied in the field of metallurgy, can solve problems such as difficulty in reaching mass production level, complex weight loss process, and expensive ultrasonic treatment, and achieve easy and accurate control and adjustment, short process flow, and low production cost Effect
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Embodiment 1
[0021] First, mix aluminum powder, zinc powder and carbon nanotubes in a mass ratio of 9:1:1, put them into a ball mill and mill them for 6 hours, then sieve and separate the balls with a 50-mesh stainless steel mesh to obtain a uniform mixture, and then Use aluminum foil to wrap the mixture. According to the amount of the mixture, it can be divided into several times and wrapped. Put the mixture into a mold of a certain size, and use a press to press at room temperature to obtain carbon nanotubes / metal Powder prefabricated blocks. Put the preheated AZ91D magnesium alloy into a crucible made of low carbon steel that has been preheated to dark red (~500°C), and start to introduce CO while melting 2 and SF 6 The gas mixture (volume ratio of CO 2 : SF 6 =99: 1) As a protective gas, when the AZ91D magnesium alloy is completely melted, the melt is refined and degassed to remove slag. After refining, when the melt temperature reached 720°C, a bell jar was used to press the carbo...
Embodiment 2
[0023] First, mix aluminum powder, zinc powder and carbon nanotubes in a mass ratio of 9:1:0.5, put them into a ball mill and mill them for 6 hours, then sieve and separate the balls with a 50-mesh stainless steel mesh to obtain a uniform mixture, and then Use aluminum foil to wrap the mixture. According to the amount of the mixture, it can be divided into several times and wrapped. Put the mixture into a mold of a certain size, and use a press to press at room temperature to obtain carbon nanotubes / metal Powder prefabricated blocks. Put the preheated AZ91D magnesium alloy into a crucible made of low carbon steel that has been preheated to dark red (~500°C), and start to introduce CO while melting 2 and SF 6 The gas mixture (volume ratio of CO 2 : SF 6 =99: 1) As a protective gas, when the AZ91D magnesium alloy is completely melted, the melt is refined and degassed to remove slag. After refining, when the melt temperature reached 720°C, a bell jar was used to press the car...
Embodiment 3
[0025] First, mix aluminum powder, zinc powder and carbon nanotubes in a mass ratio of 9:1:1.5, put them into a ball mill and mill them for 6 hours, then sieve and separate the balls with a 50-mesh stainless steel mesh to obtain a uniform mixture, and then Use aluminum foil to wrap the mixture. According to the amount of the mixture, it can be divided into several times and wrapped. Put the mixture into a mold of a certain size, and use a press to press at room temperature to obtain carbon nanotubes / metal Powder prefabricated blocks. Put the preheated AZ91D magnesium alloy into a crucible made of low carbon steel that has been preheated to dark red (~500°C), and start to introduce CO while melting 2 and SF 6 The gas mixture (volume ratio of CO 2 : SF 6 =99: 1) As a protective gas, when the AZ91D magnesium alloy is completely melted, the melt is refined and degassed to remove slag. After refining, when the melt temperature reached 720°C, a bell jar was used to press the car...
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