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Method for preparing niobium aluminum alloy through shock compression

An aluminum alloy and aluminum alloy surface technology, which is applied in the field of niobium-aluminum alloy preparation, can solve the problems of uneven shock wave and affect the uniformity of the alloy, and achieve the effects of uniform pressure distribution, good sintering performance and environmental protection.

Inactive Publication Date: 2017-07-25
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Previously, the New Mexico University of Mining and Technology and the University of California, San Diego used the chemical explosion contact explosion loading method to generate planar shock waves to synthesize niobium-aluminum alloys. However, the contact explosion only had the energy of the adjacent area of ​​the detonation wave front to compress the sample and did not rely on flyers. When the plane hits the plane, the shock wave generated is not uniform, which affects the uniformity of the alloy.

Method used

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  • Method for preparing niobium aluminum alloy through shock compression
  • Method for preparing niobium aluminum alloy through shock compression
  • Method for preparing niobium aluminum alloy through shock compression

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Embodiment 1

[0037] A method for preparing niobium-aluminum alloy by impact compression, producing the above-mentioned recycling box made of copper, comprising the following steps:

[0038] S1. The aluminum powder and the niobium powder with a purity of 99.95% and a particle size of 325 meshes are stirred and mixed in a glove box at a mass percentage of 40:60 for 30 minutes, so that the powder is evenly mixed;

[0039] S2. Weigh the uniformly mixed powder according to 1.53g in the glove box, put it into the tablet press mold, and use the tablet press to pre-press the powder into tablets;

[0040] S3. Put the tablet into the first compartment in the glove box and tighten the screw cap, then put the recycling box into the large-quality steel frame, and ensure that the bottom center of the recycling box is aligned with the center of the gun barrel;

[0041] S4. Use the secondary light gas gun to detonate the explosives and compress the light gas in the secondary air chamber, so that the flyer...

Embodiment 2

[0045] A method for preparing niobium-aluminum alloy by impact compression, producing the above-mentioned recycling box made of copper, comprising the following steps:

[0046] S1. The aluminum powder and the niobium powder with a purity of 99.95% and a particle size of 325 meshes are stirred and mixed in a glove box at a mass percentage of 40:60 for 30 minutes, so that the powder is evenly mixed;

[0047]S2. Weigh the uniformly mixed powder according to 1.45g in the glove box, put it into the tablet press mold, and use the tablet press to pre-press the powder into tablets;

[0048] S3. Put the tablet into the first compartment in the glove box and tighten the screw cap, then put the recycling box into the large-quality steel frame, and ensure that the center of the bottom of the recycling box is aligned with the center of the gun barrel;

[0049] S4. Use the secondary light gas gun to detonate the explosives and compress the light gas in the secondary air chamber, so that the...

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Abstract

The invention discloses a method for preparing niobium aluminum alloy through shock compression. The method comprises the following steps of uniformly mixing aluminum powder and niobium powder; weighing the uniformly mixed powder according to set mass, and using a tablet machine for prepressing the powder into a tablet; placing the tablet into a recovery box, screwing up the recovery box, and then placing the recovery box into a high-mass steel frame; using a light-gas gun for driving a flyer plate to impact the recovery box, carrying out shock compression acting on the tablet through a produced shock wave, forming a high-temperature high-pressure environment, and preparing to obtain the niobium aluminum alloy; and using a turning-lathe for taking the niobium aluminum alloy out from the recovery box, and grinding off impurities on the surface of the niobium aluminum alloy. According to the method for preparing the niobium aluminum alloy through shock compression provided by the invention, the characteristic that the preparation of the niobium aluminum alloy is exothermic reaction is utilized, and the advantages of rapid shock-compression loading time of the shock-compression light-gas gun, uniform pressure distribution, fine product granularity, good sintering property and the like are combined, so that high temperature and high pressure can be produced within dozens of nanoseconds to hundreds of nanoseconds so as to prepare the niobium aluminum alloy.

Description

technical field [0001] The invention belongs to the technical field of niobium-aluminum alloy preparation, and particularly relates to a method for preparing niobium-aluminum alloy by impact compression. Background technique [0002] Since it was systematically studied by the United States and Japan in 1990, niobium-aluminum alloys have been studied for high thrust-to-weight ratio aero-engine turbine blades because of their higher melting point, lower density, better high temperature strength and room temperature fracture toughness. [0003] At present, the known preparation methods of niobium-aluminum alloy mainly include mechanical alloying method, coiling method, rapid heating and cold infiltration method, rapid melting and solidification method, electric heating powder rolling method, molten salt metal thermal reduction method, and laser deposition preparation method. , high temperature melting method, impregnation-dehydrogenation method and electrochemical deposition me...

Claims

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Application Information

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IPC IPC(8): B22F3/08C22C21/00C22C27/02C22C1/04
CPCB22F3/08B22F2998/10C22C1/0416C22C1/045C22C21/00C22C27/02B22F1/0003B22F3/02
Inventor 刘其军焦振汪贻高张明建王文丹刘福生樊代和常相辉
Owner SOUTHWEST JIAOTONG UNIV
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