a nd 2 fe 14 Preparation method and application of b/al composite material

A technology of nd2fe14b and composite materials, which is applied in the manufacture of inductors/transformers/magnets, magnetic materials, and the magnetism of inorganic materials. Simple process and light specific gravity

Active Publication Date: 2020-02-21
JIANGSU UNIV
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the defects existing in the prior art, such as: traditional powder sintering preparation of magnetic materials has complex production process, long cycle, easy to produce defects, such as pores, deformation, etc., and the loss of magnetic properties is large, and the density is low , the present invention provides a kind of Nd 2 Fe 14 Preparation method of B / Al composite material

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • a nd <sub>2</sub> fe <sub>14</sub> Preparation method and application of b/al composite material
  • a nd <sub>2</sub> fe <sub>14</sub> Preparation method and application of b/al composite material
  • a nd <sub>2</sub> fe <sub>14</sub> Preparation method and application of b/al composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) Ball milling:

[0038] The Al powder used in the experiment is a powder of 99.85% purity, and the average particle diameter is 10 μm; the NdFeB powder particle size is 15 μm, and the purity is 99.9%; 45g aluminum powder and 15g NdFeB (NdFeB) 2 Fe 14 B) powder mixing, adding 5% ethanol of the above-mentioned mixed powder quality, wet grinding in a planetary ball mill for 12 hours, putting the ball-milled powder into a vacuum drying oven to dry, and obtaining a mixed fine powder;

[0039] (2) Compression molding:

[0040] The mixed fine powder in the step (1) is compressed by cold isostatic pressing, pressurized at 100 MPa, and kept under pressure for 1 min to obtain a dense composite billet;

[0041] (3) Flash sintering:

[0042]Put the composite ingot in a vacuum flash furnace and connect it in series to the circuit for flash sintering, and raise the temperature to 550°C at 5°C / min. With a field strength of 100V / cm, when the temperature reaches a constant temper...

Embodiment 2

[0047] (1) Ball milling:

[0048] The Al powder used in the experiment is a powder of 99.85% purity, and the average particle diameter is 10 μm; the particle size of NdFeB powder is 15 μm, and the purity is 99.9%; 50g aluminum powder and 10g NdFeB (NdFeB) 2 Fe 14 B) powder mixing, adding 5% ethanol of the above-mentioned mixed powder quality, wet grinding in a planetary ball mill for 10 hours, putting the ball-milled powder into a vacuum drying oven to dry, and obtaining a mixed fine powder;

[0049] (2) Compression molding:

[0050] The mixed fine powder in the step (1) is compressed by cold isostatic pressing, pressurized at 105MPa, and kept under pressure for 1.5min to obtain a dense composite billet;

[0051] (3) Flash sintering:

[0052] Put the composite ingot in a vacuum flash furnace and connect it in series to the circuit for flash sintering, and raise the temperature to 580°C at 5°C / min. With a field strength of 1000V / cm, when the temperature reaches a constant t...

Embodiment 3

[0057] (1) Ball milling:

[0058] The Al powder used in the experiment is a powder of 99.85% purity, and the average particle diameter is 10 μm; the NdFeB powder particle size is 15 μm, and the purity is 99.9%; 56g aluminum powder and 8g NdFeB (NdFeB) 2 Fe 14 B) powder mixing, adding 5% ethanol of the above-mentioned mixed powder quality, wet grinding in a planetary ball mill for 11 hours, putting the ball-milled powder into a vacuum drying oven to dry, and obtaining a mixed fine powder;

[0059] (2) Compression molding:

[0060] The mixed fine powder in the step (1) is compressed by cold isostatic pressing, pressurized at 110MPa, and kept under pressure for 1min to obtain a dense composite billet;

[0061] (3) Flash sintering:

[0062] Put the composite ingot in a vacuum flash furnace and connect it in series to the circuit for flash sintering, raise the temperature to 610°C at 5°C / min, and at the same time start to heat up, apply 2000V, 5A power to the composite ingot Wi...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
Login to view more

Abstract

The invention belongs to the technical field of preparation of composite materials, and particularly relates to a preparation method and application of an Nd2Fe14B / Al composite material. The preparation method of the Nd2Fe14B / Al composite material by flash sintering comprises the following specific steps: uniformly mixing aluminum powder with neodymium iron boron powder in proportion at first, adding ethanol, carrying out wet grinding in a ball-milling machine, and drying the wet ground powder under vacuum; carrying out compression moulding on obtained mixed fine powder by isostatic cool pressing to obtain a compact composite material billet; placing the compact composite material billet in a vacuum flash sintering furnace, serially connecting the compact composite material billet with a circuit, carrying out sintering, and applying an electric field in a flash sintering process to obtain the Nd2Fe14B / Al composite material; and magnetizing the Nd2Fe14B / Al composite material in a magnetizing machine to obtain a magnetic Nd2Fe14B / Al composite material. The magnetic Nd2Fe14B / Al composite material is uniform in tissue and stable in structure, and has high breaking tenacity, compressionstrength and good magnetic characteristic. The preparation method is simple in preparation process, high in controllability, rapid in flash sintering and short in preparation period, and is expectedto be used in production.

Description

technical field [0001] The invention belongs to the technical field of composite material preparation, in particular to a kind of Nd 2 Fe 14 Preparation method and application of B / Al composite material. Background technique [0002] Aluminum is rich in reserves in the earth's crust, and has the characteristics of small specific gravity, good thermal and electrical conductivity, excellent corrosion resistance, and good processability. However, aluminum is not magnetic, so its application in the electronic and magnetic fields is limited. Now aluminum It is completely used in non-magnetic aspects, such as aerospace, mechanical equipment, etc. Aluminum-based composite materials combine the advantages of aluminum matrix and composite phase, and have comprehensive and excellent performances such as high strength, high modulus, high wear resistance, and low expansion. They have attracted much attention in the research of new materials. A series of great achievements have been m...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/01H01F1/057H01F41/00B22F3/04B22F3/105B22F3/24
CPCB22F3/04B22F3/1007B22F3/105B22F3/24B22F2998/10H01F1/01H01F1/0577H01F41/00B22F1/0003Y02P10/25
Inventor 李桂荣解萌蕾王宏明许拓
Owner JIANGSU UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap