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Preparation method of porous CuAlMn shape memory alloy

A technology of memory alloys and particles, which is applied in the field of preparation of porous CuAlMn shape memory alloys, can solve the problems of increasing process complexity and technical difficulty, and achieve the effects of improving efficiency and product quality, increasing degrees of freedom, and preventing oxidation

Inactive Publication Date: 2011-04-27
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the melting point of the alloy is above 1000°C, the overheating of the molten metal, the control of the percolation process (the temperature of the molten metal is required to be at least 1200°C, and the percolation time must be extremely short, otherwise the molten metal will block the percolation channel after solidification) and solubility. The selection of pore-forming medium (must be solid above 1200°C, and easily soluble in water or ethanol and other non-corrosive liquid media) puts forward very high requirements, and the technology is very difficult
After the product is prepared, other subsequent machining processes are required, which increases the complexity of the process

Method used

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  • Preparation method of porous CuAlMn shape memory alloy
  • Preparation method of porous CuAlMn shape memory alloy
  • Preparation method of porous CuAlMn shape memory alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The first step, the preparation of CuAlMn shape memory alloy powder raw materials

[0040] Get the required amount of CuAlMn shape memory alloy powder made by atomization, add AlF that accounts for 0.08% of the total mass of the memory alloy powder 3 +CaF 2 Powder additive, AlF 3 with CaF 2 The mass ratio of the mixture was 4: 1, and it was ball milled on a planetary ball mill for 1.5 hours under argon protection, and the ball-to-material ratio was 10: 1 in the ball mill, and the rotating speed of the ball mill was 200 rpm;

[0041] The second step, the preparation of decrystallization water NaCl particles

[0042] Carry out decrystallization water treatment on commercially available NaCl particles, then sieve NaCl particles with different particle sizes, and select decrystallization water NaCl particles with an average particle size of 0.2mm;

[0043] The third step is to prepare the green body

[0044] The decrystallized water NaCl particles with an average parti...

Embodiment 2

[0053] The first step, the preparation of CuAlMn shape memory alloy powder raw materials

[0054] Get the required amount of CuAlMn shape memory alloy powder made by atomization method, add AlF which accounts for 0.07% of the total mass of the memory alloy powder 3 +CaF 2 Powder additive, AlF 3 with CaF 2 The mass ratio of the mixture was 4: 1, and it was ball milled on a planetary ball mill for 1.5 hours under argon protection, and the ball-to-material ratio was 10: 1 in the ball mill, and the rotating speed of the ball mill was 200 rpm;

[0055] The second step, the preparation of decrystallization water NaCl particles

[0056] Carry out decrystallization water treatment on commercially available NaCl particles, then sieve NaCl particles with different particle sizes, and select decrystallization water NaCl particles with an average particle size of 0.4mm;

[0057] The third step is to prepare the green body

[0058] The decrystallized water NaCl particles with an avera...

Embodiment 3

[0071] The first step, the preparation of CuAlMn shape memory alloy powder raw materials

[0072] Get the required amount of CuAlMn shape memory alloy powder made by atomization method, add AlF which accounts for 0.06% of the total mass of the memory alloy powder 3 +CaF 2 Powder additive, AlF 3 with CaF 2 The mass ratio of the mixture was 4: 1, and it was ball milled on a planetary ball mill for 1.5 hours under argon protection, and the ball-to-material ratio was 10: 1 in the ball mill, and the rotating speed of the ball mill was 200 rpm;

[0073] The second step, the preparation of decrystallization water NaCl particles

[0074] Carry out decrystallization water treatment on commercially available NaCl particles, then sieve NaCl particles with different particle sizes, and select decrystallization water NaCl particles with an average particle size of 1 mm;

[0075] The third step is to prepare the green body

[0076] The decrystallization water NaCl particles with an avera...

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Abstract

The invention discloses a preparation method of a porous CuAlMn shape memory alloy, which relates to the manufacturing of a porous shape memory alloy. The method comprises the following steps: with the sintering-desolvation technology, adding a trace fluoride powder additive into the CuAlMn shape memory alloy powder prepared by an atomization method, and performing ball milling to prepare a CuAlMn shape memory alloy powder raw material; mixing the raw material with NaCl particles without crystal water, and adding additive absolute ethyl alcohol into the mixture; placing the uniform mixture into a pressing mould, and pressurizing unidirectionally to obtain a green body; and performing sintering-desolvation and quenching to obtain the porous CuAlMn shape memory alloy product. The method has the advantages of simple process, low cost, high success rate, controllable product porosity and aperture and high sintering quality as well as good characteristics of damping and compression energy absorption, and is suitable to be used as a practical novel high-damping material.

Description

technical field [0001] The technical solution of the invention relates to the manufacture of porous shape memory alloys, in particular to the preparation method of porous CuAlMn shape memory alloys. Background technique [0002] Vibration and noise not only damage the environment and human health, but also affect the quality of machinery, shorten the life of equipment, and reduce the accuracy and reliability of instruments. In the past, people used negative methods to reduce vibration and eliminate noise, such as making the machine very heavy or wrapping the vibration source with porous sound-absorbing materials, but these methods were not ideal. After long-term research, it is found that the active shock-absorbing measures should be to use materials with high shock-absorbing performance to make the vibration source and the original parts of the noise, so as to fundamentally reduce the shock and eliminate the noise. High damping materials are materials with high shock and n...

Claims

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Application Information

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IPC IPC(8): C22C1/08
Inventor 王清周崔春翔李诺粱李敏王倩
Owner HEBEI UNIV OF TECH
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