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Mo micro-nanowire/CuZnAl memory alloy composite material and preparation method thereof

A composite material and memory alloy technology, applied in the field of metal composite materials, can solve the problems of low volume fraction, uneven dispersion of nanowires, inability to orientately arrange, etc., to achieve the effect of improving strength

Inactive Publication Date: 2015-03-04
CHINA UNIV OF PETROLEUM (BEIJING) +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional method of mechanical mixing and hot pressing to prepare nanowire composite materials has the following problems: the nanowires are not uniformly dispersed in the matrix, cannot be oriented, the interface is not ideally bonded, and the volume fraction is low.

Method used

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  • Mo micro-nanowire/CuZnAl memory alloy composite material and preparation method thereof
  • Mo micro-nanowire/CuZnAl memory alloy composite material and preparation method thereof
  • Mo micro-nanowire/CuZnAl memory alloy composite material and preparation method thereof

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preparation example Construction

[0030] The preparation method of Mo micro-nano wire / CuZnAl memory alloy composite material of the present invention may comprise the following steps:

[0031] (1) Select Mo powder with a particle diameter of 1 μm-5 μm and a CuZnAl composite material plate with a thickness of 8 mm-15 mm, and use friction stir processing to mix the Mo powder into the CuZnAl composite material plate. The stirring head of the friction stir processing The rotating speed is 200-2000 rev / min, the traveling speed is 20-600 mm / min, the number of times of friction stir processing is 2-6 passes, and the Mo / CuZnAl composite material is obtained;

[0032] (2) The Mo / CuZnAl composite material is rolled for multiple passes, and the temperature of the annealing treatment after each rolling is 630°C-700°C, and the time is 10-30 minutes, so that the rolled The thickness of the Mo / CuZnAl composite material after is 2mm-5mm, obtains the Mo / CuZnAl composite material after rolling;

[0033] (3) Multi-pass wire dra...

Embodiment 1

[0035] This embodiment provides a Mo micro-nanowire / CuZnAl memory alloy composite material, which is prepared according to the following method:

[0036] (1) Select Mo powder with a particle diameter of 2 μm and a CuZnAl composite material plate with a thickness of 1 cm, and incorporate the Mo powder into the CuZnAl composite material plate by friction stir processing, and the rotational speed of the stirring head of the friction stir processing is 1200 rev / min, the advancing speed is 400 mm / min, and the number of times of friction stir processing is 3 passes to obtain the Mo / CuZnAl composite material;

[0037] (2) The Mo / CuZnAl composite material is cold-rolled 5 times, and the temperature of the annealing treatment after each cold-rolling is 630 ° C, and the time is 10 minutes, so that the Mo / CuZnAl after cold-rolling The thickness of composite material is 2mm, obtains the Mo / CuZnAl composite material after cold rolling;

[0038](3) wire cutting the cold-rolled Mo / CuZnAl co...

Embodiment 2

[0042] This embodiment provides a Mo micro-nanowire / CuZnAl memory alloy composite material, which is prepared according to the following method:

[0043] (1) Select Mo powder with a particle diameter of 5 μm and a CuZnAl composite material plate with a thickness of 1 cm, and incorporate the Mo powder into the CuZnAl composite material plate by friction stir processing, and the rotational speed of the stirring head of the friction stir processing is 1000 rev / min, the advancing speed is 500 mm / min, and the number of times of friction stir processing is 2 passes to obtain the Mo / CuZnAl composite material;

[0044] (2) The Mo / CuZnAl composite material is subjected to 6 passes of cold rolling, and the temperature of the annealing treatment after each cold rolling is 630° C., and the time is 10 minutes, so that the Mo / CuZnAl after cold rolling The thickness of composite material is 2mm, obtains the Mo / CuZnAl composite material after cold rolling;

[0045] (3) passing the cold-rolle...

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Abstract

The invention provides a Mo micro-nanowire / CuZnAl memory alloy composite material and a preparation method thereof. The preparation method comprises the following steps: permeating Mo powder into a CuZnAl composite material plate by stirring friction to obtain a Mo / CuZnAl composite material; and sequentially carrying out rolling and wire drawing on the Mo / CuZnAl composite material to obtain the Mo micro-nanowire / CuZnAl memory alloy composite material. The Mo micro-nanowire / CuZnAl memory alloy composite material is prepared by the preparation method. By adopting the stirring friction+rolling+wire drawing preparation method, the Mo micro-nanowire in the composite material is uniformly distributed in the CuZnAl shape memory alloy base in the axial direction.

Description

technical field [0001] The present invention relates to a Mo micro-nanowire / CuZnAl memory alloy composite material and its preparation method, in particular to a memory alloy composite material prepared by utilizing Mo as a reinforcing phase, CuZnAl composite material as a matrix, and friction stir processing technology. Metal composite technology field. Background technique [0002] Metal matrix composites have high specific modulus, specific strength, excellent high-temperature mechanical properties, good wear resistance, dimensional stability, fatigue resistance, small thermal expansion coefficient, etc., and are widely used in aerospace, automotive, military, etc. and other fields. Among them, CuZnAl-based shape memory alloy composites have attracted widespread attention at home and abroad because of their easy processing and low cost. However, the mechanical properties of CuZnAl-based shape memory alloy composites still need to be improved. [0003] Nanowires have hi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C47/00C22C49/00C22C111/02
Inventor 杨峰倪丁瑞马宗义崔立山
Owner CHINA UNIV OF PETROLEUM (BEIJING)