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Method for preparing TiNiCu shape memory alloy damping composite

A technology of damping composite materials and memory alloys, which is applied in the field of damping material manufacturing, can solve the problems of poor mechanical properties of polymer materials, limited mechanical properties, filling phase and matrix phase damage to practical materials, etc., to shorten infiltration time, Effect of low infiltration temperature and high damping performance

Inactive Publication Date: 2017-08-04
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN102808101A discloses a preparation method of a porous copper-based shape memory alloy-based damping composite material, which is a method for filling polymers in a porous Cu-based shape memory alloy, and the damping performance of the porous shape memory alloy is further improved by using this method. To a certain extent, it overcomes the shortcomings of porous shape memory alloys that are prone to stress concentration or microcracks at the edge of the hole wall under an external load. Performance improvements are still limited
However, directly adopting the method disclosed in CN101407867A cannot realize the filling of Mg to TiNiCu alloy, because the properties of TiNiCu alloy and NiTi alloy are not the same, and the Cu phase in TiNiCu alloy is very easy to react with Mg at high temperature. If CN101407867A is used directly However, due to the excessive reaction between Cu and Mg, both the filling phase and the matrix phase of the resulting composite system will be severely damaged and it is impossible to form a practical material.

Method used

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  • Method for preparing TiNiCu shape memory alloy damping composite
  • Method for preparing TiNiCu shape memory alloy damping composite
  • Method for preparing TiNiCu shape memory alloy damping composite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The first step, the configuration of raw materials:

[0030] Weigh the required amount of titanium powder, nickel powder and copper powder, mix the ingredients according to the atomic percentages of Ni, Ti and Cu being 29%, 50% and 21% respectively, then place the mixed powder in a stainless steel ball mill tank, fill it with After sealing with water and ethanol, ball mill on a planetary ball mill for 5 hours, the ball-to-material ratio used in the ball mill is 10:1, and the rotating speed of the ball mill is 300 rpm. Let it stand for 3 minutes to complete the configuration of raw materials and set aside;

[0031] The second step, the preparation of porous TiNiCu shape memory alloy:

[0032] The mixed powder prepared in the first step is uniformly mixed with decrystallized water NaCl particles with an average particle diameter of 0.4mm, and the consumption of decrystallized water NaCl particles accounts for 60% of the volume percentage of the mixture of mixed powder an...

Embodiment 2

[0036] This example is a comparative example of Example 3.

[0037] The first step, the configuration of raw materials

[0038] Weigh the required amount of titanium powder, nickel powder and copper powder, and carry out batching according to the atomic percentages of Ni, Ti, and Cu being 30%, 50%, and 20% respectively, and then put the mixed powder in a stainless steel ball mill tank and fill it with anhydrous Seal after ethanol, ball mill on planetary ball mill for 6 hours, the ball-to-material ratio that adopts in ball mill is 10: 1, the rotating speed of ball mill is 300 rev / mins, afterwards, mixed powder is taken out and placed on filter paper and left standstill for 4 minutes, stand-by;

[0039] The second step, the preparation of porous TiNiCu shape memory alloy:

[0040] The mixed powder prepared in the first step is uniformly mixed with decrystallized water NaCl particles with an average particle diameter of 0.8mm, and the consumption of decrystallized water NaCl pa...

Embodiment 3

[0042] The first step, second step are with embodiment 2;

[0043] The third step is the preparation of the finished TiNiCu shape memory alloy-based damping composite material:

[0044] Cut off the upper and lower surface layers of the finished porous TiNiCu shape memory alloy prepared in the second step, place it in acetone, ultrasonically clean it for 50 minutes, and dry it. Clamp the upper and lower sides respectively and then bind them as a whole with moss wire, then put the whole bundled system into an alumina crucible, and place the crucible in the furnace tube of a tube-type vacuum sintering furnace, and wait for the vacuum in the furnace to reach 5Pa Then fill it with high-purity argon and then evacuate it to 5Pa again. Repeat this operation 3 times and then heat up to 700°C at a rate of 5°C / min and keep it for 20 minutes to melt the pure Mg and penetrate into the pores of the porous TiNiCu shape memory alloy. Among them, the furnace tube is then moved out of the hear...

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Abstract

The invention relates to manufacturing of a damping material, in particular to a method for preparing a TiNiCu shape memory alloy damping composite. A porous TiNiCu shape memory alloy is prepared, holes of the TiNiCu shape memory alloy are filled with metal Mg, and the TiNiCu shape memory alloy damping composite, namely, Mg / TiNiCu is prepared. The defects that in an existing porous TiNiCu shape memory alloy preparation method, the porosity, the aperture and the hole type are all hard to control; and an existing technology of introducing Mg into the porous alloy cannot be used for filling porous TiNiCu alloy with Mg, and the damping performance and other mechanical performance of an alloy product need to be improved are overcome.

Description

technical field [0001] The technical solution of the invention relates to the manufacture of damping materials, in particular to the preparation method of TiNiCu shape memory alloy-based damping composite materials. Background technique [0002] With the development of society, mechanical equipment tends to be high-speed, efficient and automated, and the problems of vibration, noise and fatigue fracture caused by it are becoming more and more prominent. Vibration and noise limit the improvement of mechanical equipment performance, seriously damage the stability and reliability of mechanical equipment operation, pollute the environment, and endanger people's physical and mental health. Therefore, reducing vibration and noise and improving the working environment of man-machines is a key issue that needs to be solved urgently . For this reason, people have researched and developed various methods and technical measures to solve vibration and noise problems in engineering, amo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/11
CPCB22F3/1103B22F3/114B22F2003/1106
Inventor 王清周李波李楠崔春翔殷福星郭英楠邓成龙
Owner HEBEI UNIV OF TECH
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