Nb layer-containing TiNb/NiTi memory material and preparation method

A technology of memory materials and raw materials, which is applied in the field of TiNb/NiTi memory materials containing Nb layers and their preparation, can solve problems such as being difficult to meet and limit applications at the same time, and achieve good biocompatibility, excellent biocompatibility, and high stress. Effect of Critical Stress Inducing Martensitic Transformation

Active Publication Date: 2020-05-22
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, although the biocompatibility of β titanium alloy is obviously better than that of NiTi alloy, its lower stress-induced martensitic transformation critical stress σSIM and smaller recoverable strain ε greatly limit its application in the biomedical field. Applications
[0004] In summary, neither a single NiTi alloy nor a β-titanium alloy can satisfy the biocompatibility (no cytotoxicity) and stress-induced martensitic transformation critical stress (high critical stress) of shape memory materials in the biomedical field at the same time. Combined requirements of stress σSIM) and shape memory effect and hyperelasticity (large recoverable strain ε)

Method used

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  • Nb layer-containing TiNb/NiTi memory material and preparation method
  • Nb layer-containing TiNb/NiTi memory material and preparation method
  • Nb layer-containing TiNb/NiTi memory material and preparation method

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Experimental program
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Effect test

Embodiment 1

[0034] The present embodiment is prepared through the following steps:

[0035] (1) Selection of raw materials.

[0036] Core material: Ni 50.5 Ti 49.5 Alloy; surface shell material: Ti 73.0 Nb 27.0 Alloy; transition layer material: high-purity Nb (99.95%, mass percent).

[0037] (2) Ti with Nb transition layer 73.0 Nb 27.0 Coated Ni 50.5 Ti 49.5 Preparation of shape memory composites.

[0038] ① Raw material cutting. Using the method of electric discharge cutting from Ni 50.5 Ti 49.5 、Ti 73.0 Nb 27.0 On the pure Nb blank, cut a 60mm×60mm×4.5mm NiTi core plate, two 60mm×60mm×0.8mm TiNb shell plates and two 60mm×60mm×0.2mm pure Nb transition laminates;

[0039] ② Cleaning of raw materials. The surface of the NiTi alloy plate, TiNb alloy plate and pure Nb plate obtained after cutting is mechanically polished to the mirror surface with 400#, 800#, 1200# sandpaper in sequence, then ultrasonically cleaned in alcohol and acetone respectively, and stored in a sealed ba...

Embodiment 2

[0047] The present embodiment is prepared through the following steps:

[0048] (1) Selection of raw materials.

[0049] Core material: Ni 50.8 Ti 49.2 Alloy; surface shell material: Ti 72.8 Nb 27.2 Alloy; transition layer material: high-purity Nb (99.95%, mass percent).

[0050] (2) Ti with Nb transition layer 72.8 Nb 27.2 Coated Ni 50.8 Ti 49.2 Preparation of shape memory composites.

[0051] ① Raw material cutting. Using the method of electric discharge cutting from Ni 50.8 Ti 49.2 、Ti 72.8 Nb 27.2 On the pure Nb blank, cut a 65mm×65mm×5mm NiTi core board, two 65mm×65mm×1mm TiNb shell boards and two 65mm×65mm×0.25mm pure Nb transition laminates;

[0052] ② Cleaning of raw materials. The surface of the NiTi alloy plate, TiNb alloy plate and pure Nb plate obtained after cutting is mechanically polished to the mirror surface with 400#, 800#, 1200# sandpaper in sequence, then ultrasonically cleaned in alcohol and acetone respectively, and stored in a sealed bag a...

Embodiment 3

[0060] The present embodiment is prepared through the following steps:

[0061] (1) Selection of raw materials.

[0062] Core material: Ni 51.0 Ti 49.0 Alloy; surface shell material: Ti 72.6 Nb 27.4 Alloy; transition layer material: high-purity Nb (99.95%, mass percent).

[0063] (2) Ti with Nb transition layer 72.6 Nb 27.4 Coated Ni 51.0 Ti 49.0 Preparation of shape memory composites.

[0064] ① Raw material cutting. Using the method of electric discharge cutting from Ni 51.0 Ti 49.0 、Ti 72.6 Nb 27.4 On the pure Nb blank, cut a 70mm×70mm×5.5mm NiTi core plate, two 70mm×70mm×1.2mm TiNb shell plates and two 70mm×70mm×0.3mm pure Nb transition laminates;

[0065] ② Cleaning of raw materials. The surface of the NiTi alloy plate, TiNb alloy plate and pure Nb plate obtained after cutting is mechanically polished to the mirror surface with 400#, 800#, 1200# sandpaper in sequence, then ultrasonically cleaned in alcohol and acetone respectively, and stored in a sealed ba...

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Abstract

The invention relates to the technical field of biomedical shape memory composite materials, in particular to a Nb transition layer-containing TiNb-coated NiTi shape memory composite material and a preparation method thereof. The composite material prepared by the method has good biocompatibility, relatively high stress-induced martensitic transformation critical stress and large recoverable dependent variable. The Nb transition layer-containing TiNb-coated NiTi shape memory composite material is expected to solve the problems that existing single biomedical shape memory alloys, such as NiTi-based alloys and Ni-free beta-titanium alloys, cannot simultaneously have good biocompatibility, relatively high stress-induced martensite transformation critical stress and large recoverable dependentvariable, and is expected to be applied in the field of biomedicines.

Description

technical field [0001] The invention relates to the technical field of biomedical shape-memory composite materials, in particular to a TiNb-coated NiTi shape-memory composite material containing a Nb transition layer and a preparation method thereof, and the composite material prepared by the method has good biocompatibility It is expected to solve the problem that existing single biomedical shape memory alloys (such as NiTi-based alloys and Ni-free β-titanium alloys) cannot simultaneously have good Biocompatibility, high stress-induced martensitic transformation critical stress and large recoverable strain are expected to be applied in the biomedical field. Background technique [0002] Due to its excellent shape memory effect and superelasticity, good corrosion resistance and high damping properties, NiTi shape memory alloy has gradually become the academic research frontier and applied research hotspot in the field of advanced functional materials. At present, NiTi shape...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C19/03C22C14/00C22F1/10C22F1/18B21B37/74B21B37/56B21B45/00
CPCB21B37/56B21B37/74B21B45/004B21B2265/10C22C14/00C22C19/03C22F1/10C22F1/18C22F1/183
Inventor 郭顺史玉露张进明吴睿瑭张慧慧吴亭慧程晓农
Owner JIANGSU UNIV
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