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Method for preparing Al2Cu bi-phase single crystal particles

A single crystal particle and single crystal technology, applied in the field of metal materials, can solve the problems of material ratio not as accurate as powder sintering, more material consumption, complicated process, etc., and achieve good quality single crystal particles, simple process and wide application Effect

Active Publication Date: 2018-11-23
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main defect of this method is that the process is complicated, it takes a long time, and each smelting needs to consume more materials, and due to the cutting of the block, the material ratio is not as accurate as powder sintering

Method used

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  • Method for preparing Al2Cu bi-phase single crystal particles
  • Method for preparing Al2Cu bi-phase single crystal particles
  • Method for preparing Al2Cu bi-phase single crystal particles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) Weigh high-purity Al powder (1.5132g) and Cu powder (0.6027g) according to the atomic ratio (Al:Cu=85.5:14.5), mix the two powders evenly and put them into a container with an inner diameter of Φ9.6mm In the cemented carbide mold, a powder tablet press was used to pressurize at 3MPa and hold for 180s to obtain a prefabricated block with a diameter of Φ14mm and a height of 10mm.

[0018] (2) The graphite furnace is a tubular furnace body with a height of 16.6mm and an outer diameter of Φ14mm and an inner diameter of Φ12mm. Both ends are sealed with boron nitride sheets of Φ12mm and a thickness of 3.3mm. The graphite furnace is equipped with a boron nitride crucible with a height of 10mm and an outer diameter of Φ12mm and an inner diameter of Φ9. 6mm, both ends are sealed with boron nitride sheets with a diameter of Φ9.6mm and a thickness of 1.2mm. Put the above materials together with the pyrophyllite squares and conductive steel rings used in the six-sided top press...

Embodiment 2

[0024] (1) Weigh high-purity Al powder (1.6619g) and Cu powder (0.6372g) according to the atomic ratio (Al:Cu=86:14), mix the two powders evenly and put them into a hard disk with an inner diameter of Φ9.6mm. In a high-quality alloy mold, a powder tablet press was used to pressurize at 3MPa and hold for 180s to obtain a prefabricated block with a diameter of Φ14mm and a height of 10mm.

[0025] (2) The graphite furnace is a tubular furnace body with a height of 16.6mm and an outer diameter of Φ14mm and an inner diameter of Φ12mm. Both ends are sealed with boron nitride sheets of Φ12mm and a thickness of 3.3mm. The graphite furnace is equipped with a boron nitride crucible with a height of 10mm and an outer diameter of Φ12mm and an inner diameter of Φ9. 6mm, both ends are sealed with boron nitride sheets with a diameter of Φ9.6mm and a thickness of 1.2mm. Put the above materials together with the pyrophyllite squares and conductive steel rings used in the six-sided top press in...

Embodiment 3

[0030] (1) Weigh high-purity Al powder (1.4501g) and Cu powder (0.6027g) according to the atomic ratio (Al:Cu=85:15), mix the two powders evenly and put them into a hard disk with an inner diameter of Φ9.6mm. In a high-quality alloy mold, a powder tablet press was used to pressurize at 2MPa and hold for 180s to obtain a prefabricated block with a diameter of Φ14mm and a height of 10mm.

[0031] (2) The graphite furnace is a tubular furnace body with a height of 16.6mm and an outer diameter of Φ14mm and an inner diameter of Φ12mm. Both ends are sealed with boron nitride sheets of Φ12mm and a thickness of 3.3mm. The graphite furnace is equipped with a boron nitride crucible with a height of 10mm and an outer diameter of Φ12mm and an inner diameter of Φ9. 6mm, both ends are sealed with boron nitride sheets with a diameter of Φ9.6mm and a thickness of 1.2mm. Put the above materials together with the pyrophyllite cubes and conductive steel rings used in the six-sided top press in a...

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Abstract

The invention discloses a method for preparing Al2Cu bi-phase single crystal particles. The method mainly comprises the steps that according to an atom ratio of Al to Cu of (85 to 86) to (14 to 15), apowder compressing machine is used for applying 2-3-MPa pressure on high purity mixed powder of the Al and the Cu, and the pressure is maintained for 180 s, so that a prefabricated block is obtained;the prepared prefabricated block is placed in a boron nitride crucible, the boron nitride crucible, a tubular graphite furnace, graphite flakes and boron nitride flakes are placed in a 6-surface diamond presser after being assembled according to a corresponding sequence, the pressure is set to be 3-5 GPa, a peak temperature is controlled at 750-800 DEG C, and heat preservation is conducted for 30min; when the temperature is reduced to 450-500 DEG C, heat preservation is conducted for 1-2 h. The method for preparing the Al2Cu bi-phase single crystal particles has the advantages that a technology is simple, the operation method is feasible, equipment is simple, the generated single crystal particles are good in quality and large in particle, and the like, and application is wide.

Description

technical field [0001] The invention belongs to the technical field of metal materials, in particular to a method for preparing single crystal particles. Background technique [0002] With the rapid development of science and technology in today's society, countless materials have been discovered and synthesized. Al-Cu alloy is a typical alloy system with many alloys such as Al 2 Cu, AlCu 3 and Al 4 Cu 9 And so on, excellent performance, wide application. The application of a material is determined by its properties, and the properties are determined by its structure. In order to understand a material, it is not enough to conduct a performance test. The performance is a macroscopic performance, and some details cannot be obtained from the performance test, so the test and analysis of the structure should also be carried out. Single crystals are the perfect experimental support for structural testing. Existing preparation of Al 2 There are many methods for Cu single c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/52C30B1/10C22C21/12C22C1/04
CPCC22C1/0416C22C21/12C30B1/10C30B29/52
Inventor 范长增陈智银
Owner YANSHAN UNIV
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