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AlMgB14-TiB2/Ti gradient functional composite and preparation method thereof

A technology of almgb14-tib2 and gradient function, which is applied in the field of composite material preparation, can solve the problems of limited application range and low toughness, and achieve the effect of ensuring reaction strength, good heat resistance and good toughness

Active Publication Date: 2018-08-17
YANGZHOU POLYTECHNIC INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Metallic Ti has the advantages of high specific strength, high toughness and friction reduction, and is an ideal advanced toughness-enhancing material due to its good affinity with borides, AlMgB 14 The material has ultra-high hardness, high wear resistance and good chemical stability, and is suitable for manufacturing military equipment and mechanical equipment under extreme mechanical conditions, but due to AlMgB 14 The low toughness of the material limits its range of applications

Method used

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  • AlMgB14-TiB2/Ti gradient functional composite and preparation method thereof
  • AlMgB14-TiB2/Ti gradient functional composite and preparation method thereof

Examples

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preparation example Construction

[0024] Such as Figure 1-2 As shown, an AlMgB 14 -TiB 2 The preparation method of Ti / Ti gradient function composite material comprises following preparation steps:

[0025] (1) AlMgB 14 Ceramic powder, Ti metal powder, TiB 2 The powder is subjected to ultrasonic dispersion treatment in ethanol for 1h;

[0026] (2) Place the above-mentioned powders after ultrasonic dispersion in a drying oven for 2 hours;

[0027] (3) Take the dried TiB 2 Powder added to AlMgB 14 Mix evenly with ceramic powder, and place it in a corundum ball mill jar for ball milling for 10 hours to form AlMgB 14 -TiB 2 mixed powder;

[0028] (4) Ti metal powder, AlMgB 14 -TiB 2 Mixed powder, AlMgB 14 The ceramic powder is stacked in the silicon carbide mold tube 5;

[0029] (5) Place the silicon carbide mold tube 5 between the upper graphite indenter 3 and the lower graphite indenter 4 in the reaction furnace and apply pressure to press into a columnar blank;

[0030] (6) Vacuumize the reaction ...

Embodiment 1

[0034] The mass fractions were 20%, 40% and 60% of TiB 2 Join AlMgB 14 Mix evenly, and mill in a corundum ball mill jar for 10 hours for later use. In the mold, place Ti metal powder, AlMgB 14 with TiB 2 mixed powder, AlMgB 14 Ceramic powder, the middle layer is 3 layers. Place the mold in a press, and press it into a columnar billet with a pressure of 15 MPa. AlMgB 14 The particle size of ceramic powder and Ti metal powder is 30-50μm, TiB 2 The particle size of the powder is 200nm, and the powder is subjected to ultrasonic dispersion treatment in ethanol for 1 hour and dried in a drying oven for 2 hours before mixing.

[0035] Such as figure 1 As shown, place the billet in the silicon carbide mold tube between the electrodes, increase the current with a pulse frequency of 40Hz to 1500A, keep it for 10min, then drop it to 1200A, keep it for 15min, and finally turn off the power, and the sample is cooled to room temperature with the furnace. The vacuum degree in the fu...

Embodiment 2

[0037] The mass fractions were 30%, 50% and 70% of TiB 2 Join AlMgB 14 Mix evenly, and mill in a corundum ball mill jar for 10 hours for later use. In the mold, place Ti metal powder, AlMgB 14 with TiB 2 mixed powder, AlMgB 14 Ceramic powder, the middle layer is 3 layers. Place the mold in a press, and press it into a columnar billet with a pressure of 15 MPa. AlMgB 14 The particle size of ceramic powder and Ti metal powder is 30-50μm, TiB 2 The particle size of the powder is 200nm, and the powder is subjected to ultrasonic dispersion treatment in ethanol for 1 hour and dried in a drying oven for 2 hours before mixing.

[0038] Such as figure 1 As shown, place the blank in the silicon carbide mold tube between the electrodes, increase the current with a pulse frequency of 50Hz to 1500A, keep it for 10min, then drop it to 1300A, keep it for 15min, and finally turn off the power, and the sample is cooled to room temperature with the furnace. The vacuum degree in the fur...

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Abstract

An AlMgB14-TiB2 / Ti gradient functional composite and a preparation method thereof belong to the technical field of composite preparation. One side of a gradient material is provided with Ti metal material, and the other side is provided with AlMgB14 ceramic material; TiB2 powder is added into the AlMgB14 ceramic powder to form three intermediate layers; from a Ti rich direction to an AlMgB14 richdirection, the hardness and strength of the composite are significantly improved, antioxidant and high-temperature-resistant properties are improved, and wear resistance and elastic modulus are gradually increased; from AlMgB14 rich direction to the Ti rich direction, toughness, electrical conductivity and heat conductivity are significantly improved. Through the transition of the TiB2 material, binding action between AlMgB14 and Ti is enhanced, and the toughness, shear strength and crushing strength of the composite are improved. A silicon carbide ceramic mold used herein allows sample blanksto be uniformly generated and current to be centrally distributed, inter-powder interfacial reaction strength is guaranteed, diffuse sintering process is promoted, and sample preparation time is shortened.

Description

technical field [0001] The invention belongs to the technical field of composite material preparation and relates to an AlMgB 14 -TiB 2 / Ti gradient function composite material and preparation method thereof, specifically relate to a kind of AlMgB prepared by reaction diffusion sintering method under the action of pulsed electric field 14 -TiB 2 / Ti gradient functional composites. Background technique [0002] Metallic Ti has the advantages of high specific strength, high toughness and friction reduction, and is an ideal advanced toughness-enhancing material due to its good affinity with borides, AlMgB 14 The material has ultra-high hardness, high wear resistance and good chemical stability, and is suitable for manufacturing military equipment and mechanical equipment under extreme mechanical conditions, but due to AlMgB 14 The low toughness of the material limits its range of applications. Contents of the invention [0003] The purpose of the present invention is to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/58C04B35/622C04B35/64B22F7/02B22F3/105
CPCB22F3/105B22F7/02C04B35/5805C04B35/58071C04B35/622C04B35/64C04B2235/3804C04B2235/3808C04B2235/666C04B2235/75
Inventor 庄蕾徐春林潘毅柳青松王家珂孙运腾
Owner YANGZHOU POLYTECHNIC INST
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