Preparation of particle reinforced damping porous nickel-titanium memory alloy based composite material

A technology of particle reinforcement and memory alloy, which is applied in the field of preparation of porous nickel-titanium memory alloy-based composite materials, can solve the problems of low specific damping capacity, high density of dense nickel-titanium alloy, and low damping value, and achieve good damping performance and superelasticity The effect of improving and increasing the carrying capacity

Inactive Publication Date: 2009-05-27
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The invention provides a second-phase particle-reinforced damping porous nickel-titanium memory alloy-based composite material for the disadvantages of low strength and damping value when porous nickel-titanium memory alloy is use

Method used

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  • Preparation of particle reinforced damping porous nickel-titanium memory alloy based composite material
  • Preparation of particle reinforced damping porous nickel-titanium memory alloy based composite material
  • Preparation of particle reinforced damping porous nickel-titanium memory alloy based composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0042] 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. 10 wt% of silicon particles (average particle diameter: 80 μm) was added to powder A, and powder B was prepared after mixing for 5 hours. Powder B was pressed at 200 MPa into a cylindrical green body with a diameter of 16 mm and a length of 12 mm. Put the billet into a tube-type sintering furnace, under the protection of argon with a purity higher than 99.99%, heat it at 15°C / min to 750°C, and keep it for 15 minutes; then heat it at 15°C / min to 1000°C and keep it for 3 Hours, the silicon / porous nickel-titanium memory alloy matrix composite material was obtained after cooling.

[0043] Picture 1-1 Metallographic photographs of the silicon / porous NiTi-based composite material prepared for Example 1 under an optical microscope. It can be seen from t...

Embodiment 2

[0046] 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. 5 wt% of silicon particles (average particle diameter: 60 μm) was added to powder C, and powder D was prepared after mixing for 5 hours. Powder D was pressed at 100 MPa into a cylindrical green body with a diameter of 16 mm and a length of 12 mm. Put the billet into a tube-type sintering furnace, heat it to 700°C at 20°C / min under the protection of argon gas with a purity higher than 99.99%, and keep it warm for 20 minutes. Then heated to 1050° C. at 10° C. / min and kept for 2 hours. After cooling, a silicon / porous nickel-titanium memory alloy matrix composite material with a porosity of 38.2% was obtained.

[0047] diagram 2-1 DSC charts of the silicon / porous nickel-titanium alloy-based composites prepared for Example 1 and Exampl...

Embodiment 3

[0055] Use pure nickel powder (average particle size of 57 μm) and pure titanium powder (average particle size of 48 μm) according to the nickel-titanium atomic ratio of 50.8:49.2 and mix thoroughly for 24 hours to obtain raw material powder E. Add 5wt% alumina powder (average particle size: 80 μm) to powder E, and mix for 5 hours to make powder F. Powder F was pressed at 200 MPa into a cylindrical green body with a diameter of 16 mm and a length of 12 mm. Put the billet into a tube-type sintering furnace, heat it to 800°C at 10°C / min under the protection of argon gas with a purity higher than 99.99%, and then keep it warm for 10 minutes. Then heated to 1000° C. at 20° C. / min and then kept for 3 hours to obtain an alumina / porous nickel-titanium alloy matrix composite material with a porosity of 41.5%.

[0056] Figure 3-1 Metallographic microstructure photographs of the alumina / porous nickel-titanium alloy-based composite material prepared for Example 3 under an optical micr...

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Abstract

The invention discloses a method for preparing a granular reinforced damping porous nickel-titanium memorial alloy based composite material. The method comprises: after evenly mixing silicon granules or aluminum oxide granules of nickel-titanium metal powder and a controlled material according to a certain proportion by adopting a step powder-sintering method, pressing the granules into a raw blank, and then integrally sintering the pressed granules once by adopting a step heating mode to prepare the composite material, wherein the silicon granules or the aluminum oxide granules account for 5 to 15 percent of weight of the raw blank. Through introducing the porous granular controlled material with low density and micron size into the nickel-titanium memorial alloy, the method quantitatively controls damping and mechanical properties of the nickel-titanium alloy, and finally obtains the novel high-damping porous nickel-titanium alloy based composite material. The composite porous nickel-titanium memorial alloy still has shape memory effect and hyperelastic deformation capability, and has better strength and damping capability compared with the common porous nickel-titanium alloy; and the method has the advantages of good adaptability, simple preparation process and low cost, and can be used for manufacturing composite damping materials, damping structures and devices.

Description

technical field [0001] The invention relates to the preparation technology of high-damping materials, in particular to a preparation method of porous nickel-titanium memory alloy-based composite materials with good damping characteristics, light weight, high strength and stable superelastic performance. Background technique [0002] With the development of industrialization and society, people pay more and more attention to the control of vibration, impact, noise and other hazards generated by various transportation and delivery vehicles, production equipment and tools, and the damping capacity of materials and structures has become an evaluation material. An important indicator of performance. The damping capacity of a material refers to its ability to quickly attenuate energy such as mechanical vibration, impact and noise. Especially in recent years, with the rapid development of aviation and aerospace technology and the rapid increase of structures and components serving...

Claims

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Application Information

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IPC IPC(8): C22C1/04C22C1/08
Inventor 张新平李大圣熊志鹏
Owner SOUTH CHINA UNIV OF TECH
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