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Nb coated NiTi shape memory composite material and preparation method thereof

A composite material and memory alloy technology, which is applied in the field of Nb-coated NiTi shape memory composite material and its preparation, can solve the problems of being difficult to satisfy and limit the application at the same time, and achieve the effects of good quality, dense and uniform surface, and high reliability.

Active Publication Date: 2020-05-19
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 alloys is significantly better than that of NiTi alloys, its lower stress-induced martensitic transformation critical stress σ SIM And the small recoverable strain ε greatly limits its application in the biomedical field
[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. Stress σ SIM ) and the comprehensive requirements of shape memory effect and hyperelasticity (large recoverable strain ε)

Method used

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  • Nb coated NiTi shape memory composite material and preparation method thereof
  • Nb coated NiTi shape memory composite material and preparation method thereof
  • Nb coated NiTi shape memory composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The present embodiment is prepared through the following steps:

[0034] (1) Selection of raw materials.

[0035] Core material: Ni50.5 Ti 49.5 Alloy; surface shell material: high-purity Nb (99.95%, mass percentage).

[0036] (2) Nb coated Ni 50.5 Ti 49.5 Preparation of shape memory composites.

[0037] ① Raw material cutting. Using the method of electric discharge cutting from Ni 50.5 Ti 49.5 On the pure Nb blank, cut a 60mm×60mm×4.5mm NiTi core plate and two 60mm×60mm×0.2mm pure Nb shell plates;

[0038] ② Cleaning of raw materials. The surface of the NiTi alloy plate and pure Nb plate obtained after cutting is mechanically polished to a mirror surface with 400#, 800#, and 1200# sandpaper in sequence, and then ultrasonically cleaned in alcohol and acetone respectively, and stored in a sealed bag after drying;

[0039] ③Making of wrapping and stacking rolling bales. According to pure Nb superstrate / Ni 50.5 Ti 49.5 The order of the core material plate / pure N...

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: high-purity Nb (99.95%, mass percentage).

[0050] (2) Nb 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 And on the pure Nb blank, cut a 65mm×65mm×5mm NiTi core board and two 65mm×65mm×0.25mm pure Nb shell boards;

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

[0053] ③Making of wrapping and stacking rolling bales. According to pure Nb superstrate / Ni 50.8 Ti 49.2 The order of the core material plate / p...

Embodiment 3

[0061] The present embodiment is prepared through the following steps:

[0062] (1) Selection of raw materials.

[0063] Core material: Ni 51.0 Ti 49.0 Alloy; surface shell material: high-purity Nb (99.95%, mass percentage).

[0064] (2) Nb coated Ni 51.0 Ti 49.0 Preparation of shape memory composites.

[0065] ① Raw material cutting. Using the method of electric discharge cutting from Ni 51.0 Ti 49.0 On the pure Nb blank, cut a 70mm×70mm×5.5mm NiTi core plate and two 70mm×70mm×0.3mm pure Nb shell plates;

[0066] ② Cleaning of raw materials. The surface of the NiTi alloy plate and pure Nb plate obtained after cutting is mechanically polished to a mirror surface with 400#, 800#, and 1200# sandpaper in sequence, and then ultrasonically cleaned in alcohol and acetone respectively, and stored in a sealed bag after drying;

[0067] ③Making of wrapping and stacking rolling bales. According to pure Nb superstrate / Ni 51.0 Ti 49.0 The order of the core material plate / pure...

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Abstract

The invention relates to the technical field of biomedical shape memory composite materials, in particular to an Nb coated NiTi shape memory composite material and a preparation method thereof. According to the method, the prepared composite material has good biocompatibility, high stress-induced martensite phase transformation critical stress and large recoverable dependent variable, the problemthat an existing single biomedical shape memory alloy, such as a NiTi-based alloy and a no-Ni beta titanium alloy, cannot has the good biocompatibility, high stress-induced martensite phase transformation critical stress and large recoverable dependent variable at the same time can be solved, and the composite material can be applied to the field of biomedicine.

Description

technical field [0001] The invention relates to the technical field of biomedical shape-memory composite materials, in particular to a Nb-coated NiTi shape-memory composite material and a preparation method thereof. The composite material prepared by the method has good biocompatibility, high Stress-induced martensitic transformation critical stress and large recoverable strain are 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, it is expected to be applied in the field of biomedicine. 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 fie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B1/38B21B47/00B21C37/02B32B15/01
CPCB21B1/38B21B47/00B21B2001/386B21C37/02B32B15/01B32B2535/00
Inventor 郭顺张进明史玉露吴睿瑭张慧慧吴亭慧程晓农
Owner JIANGSU UNIV
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