Extrusion and preparation method of metal reinforced composite material in alternating magnetic field

An alternating magnetic field and extrusion molding technology is applied in the field of material preparation to achieve the effects of cost reduction and simplification of procedures

Inactive Publication Date: 2017-03-29
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the above method has great limitations

Method used

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  • Extrusion and preparation method of metal reinforced composite material in alternating magnetic field

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1) Mud preparation

[0026] Metal Cu with excellent conductivity and ZrO with high resistivity were mixed in the mud refining machine 2 Mix the powder, add organic solvent ethanol, dispersant herring oil and binder vinyl butyral, and mix evenly to obtain mud. The volume fraction of the organic solvent is 20% of the mud, the volume fraction of the dispersant is 0.2%, and the mass fraction of the adhesive is 10% of the mud;

[0027] 2) Extrusion molding in alternating magnetic field

[0028] Extrude the mud in the extruder, the extrusion pressure is 0.2MPa, an alternating magnetic field is applied at the extrusion port, the sample is located at the end of the alternating magnetic field coil, the current intensity is 0.1A, and the current frequency is 10 2 Hz, and then obtain the green body;

[0029] 3) Drying and sintering

[0030] After drying at 20°C, sintering is carried out in a protective environment of argon at a sintering temperature of 1200°C, kept for 4 hours...

Embodiment 2

[0032] 1) Mud preparation

[0033] In the mud refining machine, the metal Al with excellent conductivity and the Al with high resistivity 2 o 3 Mix the powder, add organic solvent methyl ethyl ketone, dispersant phosphate and binder polyvinyl alcohol, and mix evenly to obtain mud. The volume fraction of the organic solvent is 30% of the mud, the volume fraction of the dispersant is 1%, and the mass fraction of the adhesive is 15% of the mud;

[0034] 2) Extrusion molding in alternating magnetic field

[0035] Extrude the mud in the extruder, the extrusion pressure is 0.4MPa, an alternating magnetic field is applied at the extrusion port, the sample is located at the end of the alternating magnetic field coil, the current intensity is 0.5A, and the current frequency is 10 3 Hz, and then obtain the green body;

[0036] 3) Drying and sintering

[0037] After drying at 30°C, sintering is carried out in a nitrogen protective environment at a sintering temperature of 1300°C, ke...

Embodiment 3

[0039] 1) Mud preparation

[0040] In the mud refining machine, the metal Ag with excellent conductivity and SiO with high resistivity 2 Mix the powder, add organic solvent butanone, dispersant triolein and binder vinyl butyral, and mix evenly to obtain mud. The volume fraction of the organic solvent is 40% of the mud, the volume fraction of the dispersant is 2%, and the mass fraction of the adhesive is 20% of the mud;

[0041] 2) Extrusion molding in alternating magnetic field

[0042] Extrude the mud in the extruder, the extrusion pressure is 0.5MPa, an alternating magnetic field is applied at the extrusion port, the sample is located at the end of the alternating magnetic field coil, the current intensity is 1A, and the current frequency is 10 4 Hz, and then obtain the green body;

[0043] 3) Drying and sintering

[0044]After drying at 40°C, sintering is carried out in a nitrogen protective environment at a sintering temperature of 1400°C, kept for 4 hours, and then co...

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Abstract

The invention discloses an extrusion moulding preparation method of a gradient material in a static magnetic field. The preparation method comprises the following steps: (1) adding an organic solvent, a dispersant, and a binding agent into mixed powder of strong magnetic metal and weak magnetic ceramic, and evenly mixing to obtain slurry; (2) extruding and moulding slurry in an extruding machine, wherein the extrusion pressure is 0.2-0.8 MPa, and applying a static magnetic field with a strength of 0.01-2 T on the extrusion opening to obtain a blank; (3) drying the blank at a temperature of 20 to 80 DEG C, sintering the blank in the atmosphere of argon gas or nitrogen gas at a temperature of 1200 to 1500 DEG C, maintaining the temperature for four hours, and finally cooling the blank in the furnace. The method has the advantages that a gradient material with continuously-changing components can be prepared, moreover, the procedure is simplified, the cost is reduced, and the performance is enhanced by the matured extrusion moulding technology.

Description

technical field [0001] The invention relates to an extrusion molding preparation method of a metal-reinforced composite material in an alternating magnetic field, and belongs to the field of material preparation. Background technique [0002] Extrusion molding refers to a processing method in which the material passes through the action between the extruder barrel and the screw, is heated and plasticized, pushed forward by the screw, and continuously passes through the machine head to make various cross-section products or semi-finished products. Traditional extrusion molding is used in the processing of thermoplastics and rubber. It can be used for batching, granulation, rubber filtration, etc., and can be used for continuous production to manufacture various continuous products such as pipes, profiles, plates (or sheets), films, Wire and cable coating, rubber tire tread strips, inner tube tubes, sealing strips, etc., have high production efficiency. With the development o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/05B22F3/20
Inventor 李静袁玮彭晓领杨艳婷徐靖才王攀峰金红晓金顶峰洪波王新庆葛洪良
Owner CHINA JILIANG UNIV
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