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Method for preparing eutectic composite LaB6-VB2 through spark plasma sintering technology

A discharge plasma, lab6-vb2 technology is applied in the field of preparation of LaB6-VB2 eutectic composite materials, and achieves the effects of uniform heating, simple method and good performance

Inactive Publication Date: 2016-08-10
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the current preparation of LaB by sintering technology 6 -MeB 2 The method of the eutectic system has not been reported yet, and in LaB 6 -MeB 2 LaB in the system 6 -VB 2 The functional characteristics of LaB are the best, so it is urgent to find a suitable sintering technology to prepare LaB with excellent mechanical properties 6 -VB 2 Eutectic composite material, which is very important to improve the service life of the whole material

Method used

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  • Method for preparing eutectic composite LaB6-VB2 through spark plasma sintering technology
  • Method for preparing eutectic composite LaB6-VB2 through spark plasma sintering technology
  • Method for preparing eutectic composite LaB6-VB2 through spark plasma sintering technology

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] In this example, LaB was prepared according to the following steps 6 -VB 2 Eutectic composites:

[0026] Step 1. Mixing

[0027] LaB with a particle size of 45 μm 6 Powder and VB with particle size of 3-5mm 2 Powder is the raw material. LaB 6 Powder and VB 2 The powders are respectively ball milled and refined to make the particle size basically the same, LaB 6 and VB 2 The time for the refinement of the raw material powder is 2h and 3h, respectively.

[0028] LaB according to the mass percentage of the eutectic phase diagram 6 Powder and VB 2 The powders were mixed in a glove box and then uniformly processed on a planetary ball mill for 2 h to obtain LaB 6 -VB 2 Mix powder; mix LaB 6 / VB 2 The mixed powder was placed in a vacuum drying box and dried at 100°C for 10h;

[0029] Step 2. Powder pre-pressing

[0030] LaB after drying 6 -VB 2 The mixed powder is loaded into a graphite mold, and then the graphite mold is placed on a manual press for pre-comp...

Embodiment 2

[0035] In this example, LaB was prepared according to the following steps 6 -VB 2 Eutectic composites:

[0036] Step 1. Mixing

[0037] LaB with a particle size of 45 μm 6 Powder and VB with particle size of 3-5mm 2 Powder is the raw material. LaB 6 Powder and VB 2 The powders are respectively ball milled and refined to make the particle size basically the same, LaB 6 and VB 2 The time for the refinement of the raw material powder is 2h and 3h, respectively.

[0038] LaB according to the mass percentage of the eutectic phase diagram 6 Powder and VB 2 The powders were mixed in a glove box and then uniformly processed on a planetary ball mill for 2 h to obtain LaB 6 -VB 2 Mix powder; mix LaB 6 / VB 2 The mixed powder was placed in a vacuum drying box and dried at 100°C for 10h;

[0039] Step 2. Powder pre-pressing

[0040] LaB after drying 6 -VB 2 The mixed powder is loaded into a graphite mold, and then the graphite mold is placed on a manual press for pre-comp...

Embodiment 3

[0045] In this example, LaB was prepared according to the following steps 6 -VB 2 Eutectic composites:

[0046] Step 1. Mixing

[0047] LaB with a particle size of 45 μm 6 Powder and VB with particle size of 3-5mm 2 Powder is the raw material. LaB 6 Powder and VB 2 The powders are respectively ball milled and refined to make the particle size basically the same, LaB 6 and VB 2 The time for the refinement of the raw material powder is 2h and 3h, respectively.

[0048] LaB according to the mass percentage of the eutectic phase diagram 6 Powder and VB 2 The powders were mixed in a glove box and then uniformly processed on a planetary ball mill for 2 h to obtain LaB 6 -VB 2 Mix powder; mix LaB 6 / VB 2 The mixed powder was placed in a vacuum drying box and dried at 100°C for 10h;

[0049] Step 2. Powder pre-pressing

[0050] LaB after drying 6 -VB 2 The mixed powder is loaded into a graphite mold, and then the graphite mold is placed on a manual press for pre-comp...

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Abstract

The invention discloses a method for preparing LaB by spark plasma sintering technology. 6 -VB 2 The method for eutectic composite material is characterized in that: first according to the mass percentage of eutectic phase diagram, LaB 6 Powder and VB 2 The powder is mixed evenly by high-energy ball milling, then pre-pressed, and finally sintered in a spark plasma sintering furnace to obtain LaB 6 -VB 2 Eutectic composites. LaB prepared by spark plasma sintering technology in the present invention 6 -VB 2 The eutectic composite material has a high density of 97%.

Description

technical field [0001] The present invention relates to a LaB 6 -VB 2 The invention relates to a preparation method of a eutectic composite material, belonging to the technical field of new material preparation. Background technique [0002] Lanthanum hexaboride (LaB) 6 )-diboride (MeB 2 , Me belongs to IVB-VB element) eutectic composite material with LaB 6 high melting point, low work function, low evaporation rate and MeB 2 high melting point, high hardness and good high temperature oxidation resistance; under the action of external load, MeB with high elastic modulus 2 It can absorb the energy of cracks well, bear most of the stress of the whole material, and improve the LaB 6 Boron brittleness, low resistance to hot cracking, so about LaB 6 -MeB 2 Composite materials and their preparation technology have always been the focus of attention. Such materials have very broad application prospects in the fields of national defense and civilian use. [0003] However, a...

Claims

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Application Information

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IPC IPC(8): C04B35/58C04B35/645
CPCC04B35/58064C04B35/5805C04B35/6455C04B2235/602C04B2235/666C04B2235/96
Inventor 张久兴王盼杨新宇胡可李志
Owner HEFEI UNIV OF TECH
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