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A kind of preparation method of rare earth composite material

A composite material and rare earth technology, which is applied in the field of metal materials, can solve the problems of storage, high activity of rare earth metals, and poor energy release effect, and achieve good energy release effect

Active Publication Date: 2022-06-28
厦门欧斯拓科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, rare earth metals are too active to be directly stored in the air for a long time in a simple state, and the energy release effect will become poor after forming an intermetallic compound with other metals.

Method used

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  • A kind of preparation method of rare earth composite material
  • A kind of preparation method of rare earth composite material
  • A kind of preparation method of rare earth composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The preparation method of the rare earth composite material of the present embodiment includes the following steps:

[0041] Raw material configuration and mixing: M powder or molybdenum powder with particle size D50 of 6.0 μm and rare earth hydride with particle size D50 of 3.0 μm were mixed on a mixer according to the raw material ratio in Table 1, and the mixing time was 24h.

[0042] Compression molding: Put the mixed powder into a rubber sleeve, and press and shape in an isostatic press with a compression pressure of 200MPa and a pressure holding time of 30s.

[0043] Sintering treatment: put the compact in a vacuum furnace and sinter in a hydrogen atmosphere at 2200°C for 10h.

[0044] Heat treatment: the sintered body is cooled to 180° C. with the furnace, and heat treated in a hydrogen atmosphere to obtain the rare earth composite material.

[0045] The static compressive strength test and dynamic compressive test of the rare earth composite materials prepared ...

Embodiment 2

[0053] The preparation method of the rare earth and tungsten composite material of the present embodiment includes the following steps:

[0054] Raw material configuration and mixing: The tungsten powder with a particle size D50 of 7.0 μm and the rare earth hydride with a particle size D50 of 4.5 μm were mixed on a mixer according to the raw material ratio in Table 3, and the mixing time was 36 hours.

[0055] Compression molding: Put the mixed powder into a rubber sleeve, and press and shape in an isostatic press with a compression pressure of 350MPa and a pressure holding time of 25s.

[0056] Sintering and dehydrogenation: put the compact in a vacuum furnace and sinter in a hydrogen atmosphere at 2250°C for 8h.

[0057] Hydrogenation treatment: the sintered body is cooled to 200° C. in a furnace, and heat treated in a hydrogen atmosphere to obtain the rare earth composite material.

[0058] The rare earth composite materials of each example and each comparative example wer...

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Abstract

The invention discloses a preparation method of a rare earth composite material. The chemical formula of the rare earth composite material is R-H-M, wherein R is selected from Nd, Pr, Dy, Tb, Ho, La, Ce, Pm, Sm, Eu , at least one of Gd, Er, Tm, Yb, Lu and Y elements, the M is selected from at least one of W or Mo, and the preparation method includes the following steps: a, M powder and rare earth hydride powder Mix according to the raw material ratio of the rare earth composite material; b. The powder is mixed uniformly and then pressed into shape; c. Put the shaped green body into a vacuum atmosphere furnace for sintering; the cooled sintered green body is in a hydrogen atmosphere heat treatment to prepare the rare earth composite material. The rare earth composite material of the invention has high release energy, can realize high energy release in an oxygen-free environment, and significantly improves the application environment of metal energy release materials.

Description

technical field [0001] The invention relates to metal materials, in particular to a preparation method of rare earth composite materials. Background technique [0002] For the currently known metal energy release materials, the energy release mechanism is that an element that is easier to react with oxygen reacts with oxygen, releasing a large amount of heat; the second is the reaction between metal and metal or between metal and intermediate products. At present, metal energy release materials mainly use Zr, Al and other highly active elements as the main energy release elements, and achieve combustion effect in an environment with high air or oxygen content, but usually in low-pressure oxygen-deficient, underwater and other environments. poor, and its mechanical properties are insufficient, making it difficult to use in structural components. [0003] Rare earth metals are highly active materials, and their combustion energy release value is much higher than that of exist...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/05C22C27/04C22C28/00B22F3/02B22F3/10B22F3/24
CPCC22C1/05C22C28/00C22C27/04B22F3/02B22F3/1007B22F3/24B22F2003/248
Inventor 王子秋吴建鹏吕延伟张畅
Owner 厦门欧斯拓科技有限公司
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