Beryllium aluminum alloy discharging plasma sintering preparation method

A technology of discharge plasma and discharge plasma, which is applied in the field of metallurgical manufacturing of non-ferrous metal materials, can solve the problems of difficult densification, high sintering temperature, and long sintering time, and achieve the effect of fine structure, low sintering temperature and simple process

Inactive Publication Date: 2018-09-04
MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a new sintering method to solve the problems of complex procedures, difficult densification, high sintering temperature and long sintering time in the preparation process

Method used

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  • Beryllium aluminum alloy discharging plasma sintering preparation method
  • Beryllium aluminum alloy discharging plasma sintering preparation method
  • Beryllium aluminum alloy discharging plasma sintering preparation method

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specific Embodiment approach 1

[0027] The preparation method of beryllium aluminum alloy of this implementation, carries out according to the following steps:

[0028] 1. Raw material mixing: use high-energy ball mill to mix beryllium powder and aluminum alloy powder according to the designed composition ratio;

[0029] 2. Cold isostatic pressing: Put the composite material powder into a soft film mold of a certain shape, and cold-press the billet with a certain density and strength by cold isostatic pressing. The cold isostatic pressing pressure is 50-250MPa. Pressure holding time 10-20min;

[0030] 3. Discharge plasma sintering: put the cold compact into the designed mold, then put it into the SPS furnace body, and evacuate to 1.0×10 -2 Pa, the sintering temperature is 500-600°C, the heating rate is 50-100°C / min, the sintering pressure is 20-50MPa, and the holding time is 5-10min.

specific Embodiment approach 2

[0031] The difference between this embodiment and specific embodiment 1 is: the discharge plasma preparation method of a beryllium aluminum alloy is characterized in that the beryllium aluminum alloy raw material powder is beryllium powder and aluminum alloy powder, and the beryllium content is 30% -70wt%, others are the same as the specific embodiment one.

specific Embodiment approach 3

[0032] The difference between this embodiment and specific embodiment 1 or 2 is that in the discharge plasma preparation method of a beryllium aluminum alloy, the raw material aluminum alloy powder is 1XXX series, 2XXX series, 6XXX series, 7XXX series aluminum alloy powder, and the particle size is 5-20μm. The particle size of beryllium powder is 5-20μm. Others are the same as those in Embodiment 1 or 2.

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Abstract

The invention relates to a beryllium aluminum alloy discharging plasma sintering preparation method, which comprises the following steps of mixing beryllium powder and aluminum alloy power according to the design ingredient proportion; charging the mixed materials into a soft mold; making the materials into a cold pressing blank through cold isopressing; charging the cold pressing mold into a graphite mold; then, putting the graphite mold into an SPS furnace body; performing vacuum pumping and pressurization; performing discharging plasma sintering. Compared with other preparation methods, themethod has the advantages that the work procedure is simple; the sintering temperature is low; the sintering time is short; the tissue is fine and uniform; the mechanical performance is good. The beryllium aluminum alloy powder metallurgy process is simplified; the production efficiency is improved; in addition, the method is hopeful to be applied to the field of aerospace. The beryllium aluminumalloy can select a polynary aluminum alloy system; the beryllium aluminum alloy meeting different service condition requirements can be prepared according to the characteristics of the aluminum alloyin different series.

Description

technical field [0001] The invention belongs to the technical field of metallurgical manufacturing of nonferrous metal materials, and relates to a preparation method of beryllium aluminum alloy. Background technique [0002] Beryllium has the characteristics of low density, high melting point, high rigidity, low thermal neutron absorption cross section, excellent thermal performance, high infrared reflectivity, and good X-ray penetration, but it is brittle and difficult to process, and it is difficult to make complex structural parts . Developing composites with plastic matrices could improve beryllium's room-temperature brittleness approach. In the 1960s, NASA devoted itself to the development of plastic beryllium-based materials, and successfully developed a series of beryllium-aluminum alloys. The research on beryllium aluminum alloys first began in 1961, and Fenn et al. reported the performance of a series of beryllium aluminum alloys with an aluminum content of 24wt%~...

Claims

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Application Information

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IPC IPC(8): C22C1/04C22C25/00C22C21/00B22F3/04B22F3/105
CPCC22C1/04B22F3/04B22F3/105B22F2998/10C22C1/0416C22C21/00C22C25/00B22F1/0003
Inventor 刘向东张鹏程高瑞王志毅李冰清徐庆东
Owner MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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