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Preparation of composite type light high-strength nickel-titanium memory alloy-based high damping material

A nickel-titanium memory alloy and composite technology, which is applied in the field of preparation of high damping materials, can solve the problems of difficulty in achieving damping effect and low volume fraction of nickel-titanium memory alloy, and achieve excellent damping capacity, good comprehensive mechanical properties, and bearing capacity. improved effect

Inactive Publication Date: 2010-12-29
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the volume fraction of nickel-titanium memory alloy in these composite materials is low, and it does not function as the main body, so it is difficult to achieve a good damping effect
[0008] However, there is no report on the method of adjusting the performance of NiTi memory alloy by adding other materials with different physical properties using NiTi memory alloy as the base material.

Method used

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  • Preparation of composite type light high-strength nickel-titanium memory alloy-based high damping material
  • Preparation of composite type light high-strength nickel-titanium memory alloy-based high damping material
  • Preparation of composite type light high-strength nickel-titanium memory alloy-based high damping material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Use pure nickel powder (average particle size 57 μm) and pure titanium powder (average particle size 48 μm) according to nickel:titanium atomic ratio 50.8:49.2 and mix thoroughly for 24 hours to obtain raw material powder A. Add 10wt.% ammonium bicarbonate (particle size: 200-300, average particle size: 250 μm) to powder A, mix thoroughly to make powder B. Powder B was pressed at 200 MPa into a cylindrical green body with a diameter of 16 mm and a height of 12 mm. Put the billet into a tubular sintering furnace, raise the temperature to 200°C under the protection of argon with a purity higher than 99.99%, and keep it warm for 1.5 hours to remove the pore-forming agent ammonium bicarbonate and activate the billet. Then the temperature was raised to 700° C. at 15° C. / min and kept for 20 minutes. Finally, the temperature was raised to 1000° C. at 15° C. / min, kept for 3 hours, and a porous nickel-titanium memory alloy with a porosity of 36.1% was obtained after cooling.

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Embodiment 2

[0057] Use pure nickel powder (average particle size of 57 μm) and pure titanium powder (average particle size of 48 μm) according to the atomic ratio of nickel and titanium of 51:49 and mix thoroughly for 24 hours to obtain raw material powder C. Add 20wt.% ammonium bicarbonate (with a particle size of 50-200 and an average particle size of 100 μm) to powder C, and mix thoroughly to make powder D. Powder D was pressed at 100 MPa into a cylindrical green body with a diameter of 16 mm and a height of 12 mm. The billet is put into a tube sintering furnace, heated to 250° C. under the protection of argon with a purity higher than 99.99%, and kept for 1 hour to remove the pore-forming agent. Then heat at 20°C / min to 750°C and keep warm for 15 minutes. Finally, it was heated to 1050°C at 10°C / min, kept for 2 hours, and cooled to room temperature to obtain a porous nickel-titanium memory alloy with a porosity of 43.6%.

[0058] Metal magnesium and porous nickel-titanium memory all...

Embodiment 3

[0061] Use pure nickel powder (average particle size of 57 μm) and pure titanium powder (average particle size of 48 μm) according to the atomic ratio of nickel and titanium of 50:50 and mix thoroughly for 24 hours to obtain raw material powder E. Add 30wt.% urea (particle size: 300-450, average particle size: 400 μm) to powder E, and mix for 8 hours to make powder F. Powder F was pressed at 100 MPa into a cylindrical green body with a diameter of 16 mm and a length of 12 mm. The billet is put into a tube-type sintering furnace, heated to 300° C. under the protection of argon with a purity higher than 99.99%, and kept for 0.5 hours to remove the pore-forming agent. Then heat at 10°C / min to 800°C and keep warm for 10 minutes. Finally, it was heated to 1000° C. at a heating rate of 20° C. / min, kept for 3 hours, and cooled to room temperature to obtain a porous nickel-titanium memory alloy with a porosity of 60%.

[0062] AZ91D magnesium alloy and porous nickel-titanium memory ...

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Abstract

The invention discloses a preparation method of a compound type light-weight high-intensity nickel-titanium memorial alloy base high damping material. In the method, a powder sintering method is mainly used as a foundation and a pressureless infiltration technology is used as assistance; a pore-creating technology is firstly adopted; and a unit metal powder cascade sintering method is used for preparing a porous nickel-titanium alloy the holes of which are uniformly distributed; and then the pressureless infiltration technology is adopted for inducing the pure magnesium or magnesium alloy phase with high intrinsic damping, low density and micron scale into the porous nickel-titanium alloy, thereby preparing the high-damping magnesium(or magnesium alloy) / nickel-titanium memorial alloy basecompound material the damping control phase of which is magnesium or the magnesium alloy. The compound nickel-titanium memorial alloy prepared by the invention still has the shape memory effect and the superelasticity action as well as has weight lighter than that of the compact nickel-titanium memorial alloy and intensity and damping capacity more excellent than that of the common porous nickel-titanium memorial alloy. The preparation method has good technical suitability, simple preparation process and low cost, and can be used for manufacturing the light-weight high-intensity compound damping materials, damping structures and apparatuses.

Description

technical field [0001] The invention relates to a preparation technology of a high damping material, in particular to a preparation method of a nickel-titanium memory alloy-based composite material with good damping capacity, light weight, high strength and stable superelastic performance. Background technique [0002] The control of vibration, shock and noise and the regulation of kinetic energy are becoming increasingly important in various civil and industrial (including military) structures, components and facilities. For example, the increase of mechanical operating speed will generate strong vibration and noise, which will interfere with the automatic control system, reduce the measurement accuracy of the instrument or cause fatigue damage or even fatigue damage; in some requirements, the impedance matching of the connection part and the flexible connection of the interface of the material components with different mechanical properties can be realized. Occasions (such...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/04C22C1/08C22C19/03
Inventor 张新平李大圣熊志鹏
Owner SOUTH CHINA UNIV OF TECH
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