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
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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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