Ti-Nb-O memory alloy having high recoverable strain and preparation method thereof

A memory alloy and alloy technology, which is applied in the field of Ti-Nb-O memory alloy and its preparation, can solve the problems of high production cost, reduce the elastic modulus of the alloy, complicated processes, etc., achieve low production cost, reduce the elastic modulus, simple craftsmanship

Active Publication Date: 2015-06-03
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, it is difficult to prepare some special-shaped implant devices by conventional methods. Even if it can be prepared, there are disadvantages such as complicated procedures and high production costs. At the same time, it is difficult to further reduce the elastic modulus of the alloy by conventional methods without changing the composition of the alloy.

Method used

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  • Ti-Nb-O memory alloy having high recoverable strain and preparation method thereof
  • Ti-Nb-O memory alloy having high recoverable strain and preparation method thereof
  • Ti-Nb-O memory alloy having high recoverable strain and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Pure Ti powder, Nb powder, TiO 2 Powder and TiH 2 According to the ratio of Ti atoms, Nb atoms, O atoms and H atoms to 86:11:1:2, the powder is mixed evenly by ball milling method. The purity of the powder used is 99.5%, and the particle size is 48-75 μm; Press molding in air, the molding pressure is 600MPa, the temperature is 30°C, and the time is 5 minutes to obtain a green body;

[0032] (2) Put the green body obtained in step (1) into a sintering furnace, and sinter it under vacuum. The sintering temperature is 1400°C, and the sintering time is 10 hours to obtain a sintered Ti-Nb-O alloy, which is analyzed by chemical composition. The atomic ratio of Ti:Nb:O is 88:11:1;

[0033] (3) Put the sintered Ti-Nb-O alloy obtained in step (2) into a tube furnace, and carry out solid solution treatment under the protection of argon. Rapid cooling in ice water to obtain solid solution Ti-Nb-O memory alloy;

[0034] (4) Put the Ti-Nb-O memory alloy in solid solution sta...

Embodiment 2

[0040] (1) Pure Ti powder, Nb powder, TiO 2 Powder and TiH 2 The powder is uniformly mixed according to the ratio of Ti atoms, Nb atoms, O atoms and H atoms in the ratio of 88:11:0:0. The purity of the powder used is 99.5%, and the particle size is 48-75 μm; The powder is compressed in air, the molding pressure is 600MPa, the temperature is 100°C, and the time is 10 minutes to obtain a green body;

[0041] (2) Put the green body obtained in step (1) into a low-pressure sintering furnace, and sinter it under the protection of argon. The atomic ratio of :Nb:O is 88:10.7:1.3;

[0042] (3) Put the sintered Ti-Nb-O alloy obtained in step (2) into a tube furnace, and carry out solid solution treatment under the protection of argon. Cool to ice water to obtain solid solution Ti-Nb-O memory alloy;

[0043] (4) Put the Ti-Nb-O memory alloy in solid solution state obtained in step (3) into a tube furnace, and perform aging treatment under the protection of argon. The aging temperatu...

Embodiment 3

[0046] (1) Pure Ti powder, Nb powder, TiO 2 Powder and TiH 2 According to the ratio of Ti atoms, Nb atoms, O atoms and H atoms to 83:15:2:0, the powder is mixed evenly by ball milling method. The purity of the powder used is 99.5%, and the particle size is 48-75 μm; Press molding in air, the molding pressure is 400MPa, the temperature is 50°C, and the time is 15 minutes to obtain the alloy green body;

[0047] (2) Put the green body obtained in step (1) into a hot isostatic pressing furnace, and sinter it under the protection of argon. The sintering temperature is 1300°C, and the sintering time is 16 hours to obtain a sintered Ti-Nb-O alloy. The atomic ratio of Ti:Nb:O is 84:13.5:2.5;

[0048] (3) Put the sintered Ti-Nb-O alloy obtained in step (2) into a tube furnace, and carry out solid solution treatment under the protection of argon. The solid solution temperature is 900°C, and the solid solution time is 5 hours. Cooling into ice water to obtain high recoverable strain,...

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Abstract

The invention discloses a Ti-Nb-O memory alloy having a high recoverable strain and a preparation method thereof. The method comprises the steps: mixing uniformly a pure Ti powder, a pure Nb powder, a pure TiO2 powder and a pure TiH2 powder according to the ratio of Ti atoms, Nb atoms, O atoms and H atoms being (77-91):(8-18):(1-3):(0-5), and carrying out compression molding to obtain a green body; putting the green body into a sintering furnace, sintering under a protective gas atmosphere, and thus obtaining a sintered-state Ti-Nb-O alloy; putting the Ti-Nb-O alloy into a tube furnace, carrying out solid solution treatment under the argon gas protection, putting the solid solution state Ti-Nb-O memory alloy into the tube furnace, carrying out aging treatment under the argon gas protection, and then rapidly cooling in ice water to obtain the high recoverable strain. The Ti-Nb-O alloy shows low elastic modulus, extremely high compressive strength and relatively high recoverable strain, and is suitable for use in medical hard tissue replacement and reparation materials.

Description

technical field [0001] The invention relates to a highly recoverable strain Ti-Nb-O memory alloy and a preparation method thereof, belonging to the field of medical human body hard tissue replacement and repair materials. Background technique [0002] With the rapid development of the economy, the continuous improvement of people's living and medical standards, and the continuous decline of the birth rate, the aging of the national population has continued to aggravate. The elderly are prone to various degenerative diseases such as osteoporosis, and the most effective way to cure these diseases at present is to replace the damaged hard tissue with implant materials. As a result, there is an increasing need for hard tissue replacement and repair materials in the elderly. It is generally required that hard tissue implant materials have good biocompatibility (no harm to the human body), high strength (to prevent deformation or fracture of implant devices), low elastic modulus ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/05C22C14/00C22F1/18
Inventor 袁斌高岩朱敏赖铭陈小虎
Owner SOUTH CHINA UNIV OF TECH
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