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Preparation method of porous CuAlMn shape memory alloy with controllable pore structure parameters

A technology of memory alloy and pore structure, which is applied in the field of preparation of porous CuAlMn shape memory alloy, which can solve the problems of inability to accurately control the parameters of pore structure, and achieve the effects of large energy absorption, high porosity, and water saving

Inactive Publication Date: 2011-09-21
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, none of these methods can precisely control the parameters of the pore structure (including pore size, shape, orientation, distribution, etc.)

Method used

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  • Preparation method of porous CuAlMn shape memory alloy with controllable pore structure parameters
  • Preparation method of porous CuAlMn shape memory alloy with controllable pore structure parameters
  • Preparation method of porous CuAlMn shape memory alloy with controllable pore structure parameters

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Example 1: The alloy composition is Cu-11.9Al-2.5Mn (wt%), NaCl with a particle size of 800-1000 μm is taken, and CuAlMn and NaCl are fully mixed at a mass ratio of 2: 1, according to the method described in "Summary of the Invention" Make a Φ70 hot-pressed ingot, measure the quality of the sample before and after hot-pressing to determine whether the desalination is complete, and wire-cut it into the required test sample. The appearance of the hot-pressed ingot in this embodiment is shown in figure 2 (a), its body sees gold image 3 (a), (b), metallographic pictures see Figure 4 (a), (b). It can be seen that the pores of the alloy in this example are sheet-like, oriented and evenly distributed, and the shape and size of the pores are consistent with the NaCl used. The pore structure and performance data of the porous CuAlMn shape memory alloy in this example are shown in Table 1.

[0045] Table 1 present example porous CuAlMn shape memory alloy pore structure and ...

Embodiment 2

[0047] Example 2: The alloy composition is Cu-11.9Al-2.5Mn (wt%), NaCl with a particle size of 355-800 μm is taken, and CuAlMn and NaCl are fully mixed at a mass ratio of 2: 1, according to the method described in "Summary of the Invention" Make a Φ70 hot-pressed ingot, measure the quality of the sample before and after hot-pressing to confirm that the desalination is complete, and wire-cut it into the required test sample. The pores of the alloy in this example are flaky, oriented and evenly distributed, and the shape and size of the pores are consistent with the shape and size of the NaCl used. The pore structure and performance data of the porous CuAlMn shape memory alloy in this example are shown in Table 2.

[0048] Table 2 Pore structure and performance data of the porous CuAlMn shape memory alloy in this example

[0049] Porosity

Embodiment 3

[0050] Embodiment 3: the alloy composition is Cu-11.9Al-2.5Mn (wt%), get the NaCl of 355-800 μm grain size, CuAlMn and NaCl are fully mixed according to the mass ratio of 3: 1, according to the method described in "Summary of the Invention" Make a Φ70 hot-pressed ingot, measure the quality of the sample before and after hot-pressing to confirm that the desalination is complete, and wire-cut it into the required test sample. The compression curve of the sample in this example is shown in Fig. 5(a). The pores of the alloy in this example are flaky, oriented and evenly distributed, and the shape and size of the pores are consistent with the shape and size of the NaCl used. The pore structure and performance data of the porous CuAlMn shape memory alloy in this example are shown in Table 3.

[0051] Table 3 Pore structure and performance data of porous CuAlMn shape memory alloy in this example

[0052] Porosity

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Abstract

The invention discloses a preparation method of porous CuAlMn shape memory alloy with controllable pore structure parameters. The method comprises the following steps of: smelting Cu-Al-Mn alloy, atomizing the Cu-Al-Mn alloy with high-purity N2 to prepare Cu-Al-Mn alloy powder, preparing sheet NaCl powder, blending the Cu-Al-Mn alloy powder and the NaCl powder, hot-pressing and sintering the mixture in vacuum, sintering and evaporating the mixture at a high temperature to desalt the mixture, and quenching the solid solution. The porous CuAlMn shape memory alloy provided by the invention is directionally arranged and uniformly distributed in pores, high in compression strength and high in energy absorption ability. As a high-energy absorption ability and bacterial growth-preventing material, the porous CuAlMn shape memory alloy is expected to be used in aspects, such as impact energy absorption, impact prevention, noise reduction of an air conditioner air supply system and the like. By the preparation method provided by the invention, opened-hole or closed-hole porous metal materials can be prepared. The method has the advantages of controllable pore structure parameters, complete desalting and the like.

Description

technical field [0001] The invention relates to a preparation method of a porous CuAlMn shape memory alloy with controllable pore structure parameters. Background technique [0002] In recent years, the development of the aerospace industry has put forward requirements for the vibration damping function of traditional structural materials. The failure analysis results of rockets and satellites show that about 2 / 3 of the failures are related to vibration and noise. During the long-term use of the aircraft, due to vibration, cracks in the rudder and tail cover, cracks in the pitot tube, and noise in the cockpit often occur, which seriously affect its reliability and service life. Various instruments and meters on the aircraft are in the environment of vibration and noise, and often break down. The vibration and noise in the engine room are also seriously harmful to people's physical and mental health, which is one of the important issues that environmental engineering needs ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/08C22C9/01
Inventor 李周龚深肖柱雷前胡琳娜
Owner CENT SOUTH UNIV