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Rare-earth-cobalt-based composite material

A composite material and composite magnetic material technology are applied in the field of rare earth cobalt-based composite materials to achieve the effects of saving raw material costs, reducing raw material costs and improving coercivity.

Active Publication Date: 2017-03-22
NINGBO STAR MATERIALS HI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this scheme, the rare earth oxide added in the rare earth cobalt-based composite material is divided into endogenous rare earth oxide and external rare earth oxide, which can overcome the problem of controlling the oxygen content in the prior art to avoid magnetic deterioration, thereby effectively improving the mechanical properties.

Method used

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Experimental program
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preparation Embodiment 1

[0056] The preparation method of this embodiment includes the following steps: 1), smelting and casting the raw materials of the matrix to obtain ingots; 2), hydrogen breaking; 3), jet milling; 4), magnetic powder mixing; 5), orientation molding, Cold isostatic pressing and heat treatment to obtain rare earth cobalt-based composite materials; the heat treatment is to heat the blank obtained by cold isostatic pressing to 1100°C for 4.5 hours, and then lower it to 930°C at a cooling rate of 0.4°C / min for 13 hours and keep it in the air. Cool to room temperature, then keep warm at 760°C for 5 hours, then slowly cool to 360°C at a cooling rate of 0.8°C / min and keep warm for 3 hours, then air-cool to room temperature.

preparation Embodiment 2

[0058] The preparation method of this embodiment includes the following steps: 1), smelting and casting the raw materials of the matrix to obtain ingots; 2), hydrogen breaking; 3), jet milling; 4), magnetic powder mixing; 5), orientation molding, Rare earth cobalt-based composite materials are obtained by cold isostatic pressing and heat treatment; the heat treatment is to heat the blank obtained by cold isostatic pressing to 1150°C for 5.5 hours, and then lower it to 950°C at a cooling rate of 4°C / min for 5 hours and keep it in the air. Cool to room temperature, then keep warm at 820°C for 40 hours, then slowly cool to 500°C at a cooling rate of 2.4°C / min and keep warm for 2 hours, then air-cool to room temperature.

preparation Embodiment 3

[0060] The preparation method of this embodiment includes the following steps: 1), smelting and casting the raw materials of the matrix to obtain ingots; 2), hydrogen breaking; 3), jet milling; 4), magnetic powder mixing; 5), orientation molding, Cold isostatic pressing and heat treatment to obtain rare earth cobalt-based composite materials; the heat treatment is to raise the temperature of the blank obtained by cold isostatic pressing to 1200°C for 3.5 hours, and then reduce it to 1050°C at a cooling rate of 3°C / min for 15 hours and keep it in the air. Cool to room temperature, then keep warm at 780°C for 20 hours, then slowly cool to 400°C at a cooling rate of 3.1°C / min and keep warm for 1 hour, then air cool to room temperature.

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Abstract

The invention discloses a rare-earth-cobalt-based composite material. The rare-earth-cobalt-based composite material is prepared from, by mass, 40 wt%-98.55 wt% of matrixes and the balance additional rare earth oxide, the matrixes are samarium-cobalt-based composite materials, and the rare earth oxide in the rare-earth-cobalt-based composite material comprises endogenous rare earth oxide and the additional rare earth oxide which are oxidized by rare earth elements in the samarium-cobalt-based composite materials. According to the rare-earth-cobalt-based composite material, the amount of second-phase oxide is increased through the additional rare earth oxide to improve the mechanical performance of the rare-earth-cobalt-based composite material and reduce the raw material cost, and meanwhile magnetic performance deterioration caused by rare earth oxide increasing is greatly reduced by adjusting ingredients and the preparing technology.

Description

technical field [0001] The invention relates to a rare-earth samarium-cobalt permanent magnet material, in particular to a rare-earth cobalt-based composite material. Background technique [0002] In recent years, the continuous development of functional materials has effectively promoted the social progress of human society. Permanent magnetic materials are one of the functional materials. Due to their energy conversion function and various magnetic physical effects, they have been widely used in today's information society. . Rare earth permanent magnet material is the permanent magnet material with the highest comprehensive performance known at present. Its magnetic performance is more than 100 times higher than that of magnet steel, and its performance is much superior to that of ferrite and alnico. Since the use of rare earth permanent magnet materials not only promotes the miniaturization of permanent magnet devices and improves the performance of products, but also p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/055H01F1/09B22F3/24
CPCB22F3/24B22F2003/248H01F1/0551H01F1/09
Inventor 李明潘道良苏广春胡剑梁永林程书霞
Owner NINGBO STAR MATERIALS HI TECH
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