Super elastic zirconium alloy for biological use, medical instrument and glasses

A living tissue and superelastic technology, applied in tissue regeneration, glasses/goggles, instruments, etc., to achieve high compatibility and high processability

Inactive Publication Date: 2014-05-14
UNIV OF TSUKUBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the technology described in Patent Document 1, as shown in the stress-strain curve in Figure 10, the maximum recovery deformation (the maximum value of deformation—residual deformation after unloading) has only a slightly higher elasticity of 3.5%.

Method used

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  • Super elastic zirconium alloy for biological use, medical instrument and glasses
  • Super elastic zirconium alloy for biological use, medical instrument and glasses
  • Super elastic zirconium alloy for biological use, medical instrument and glasses

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Embodiment Construction

[0037] Specific examples of embodiments of the present invention will be described below, but the present invention is not limited to the following examples.

[0038] The alloy of the present invention is a zirconium-based alloy mainly composed of zirconium (Zr). In addition, the alloy of the present invention has the effect of lowering the transition temperature from the β phase, which is the parent phase of zirconium's martensite (martensite) transformation at room temperature, to the α phase, that is, contains the β phase that stabilizes the β phase of zirconium. The elements titanium (Ti) and niobium (Nb), the alloy undergoes a thermoelastic martensitic (martensite) transformation.

[0039] In addition, Ti and Nb dissolve in Zr, and also undertake the role of dissolution strengthening, which increases the critical stress of sliding deformation, makes sliding deformation difficult to occur, and achieves good superelasticity. In addition, for Ti, since the variation of the ...

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Abstract

Provided is a super elastic alloy for biological use having a high biocompatibility, good processability and super elasticity, said super elastic alloy being a super elastic zirconium alloy for biological use comprising 27-54 mol% inclusive of titanium, 5-9 mol% inclusive of niobium which is a beta phase-stabilizing element capable of stabilizing the beta phase of zirconium, and 1-4 mol% inclusive in total of tin and / or aluminum which are omega phase-suppressing elements capable of suppressing the omega phase of zirconium, with the balance consisting of zirconium and unavoidable impurities.

Description

technical field [0001] The present invention relates to a superelastic zirconium alloy for living tissue and a medical appliance and glasses using the superelastic zirconium alloy for living tissue. Background technique [0002] In the medical field, surgery, and artificial bone (implant), various alloys for living tissues are used. [0003] For example, Ti—Ni-based alloys have the characteristics of excellent strength, wear resistance, corrosion resistance, and good compatibility with living tissues, and are used in various medical devices as materials for living tissues. [0004] However, due to the lack of workability of Ti-Ni light alloys, the cold working rate has a limit, in the range of 30% to 40%, so it is necessary to add processing techniques such as intermediate annealing, and the processing cost is high. Difficulty has limitations in its application. In addition, because Ni contained in living tissue materials using Ti-Ni alloys may cause allergic symptoms, res...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C16/00A61C7/12G02C5/14A61L31/00
CPCC22C14/00A61C2201/007A61L27/06A61L27/50A61L29/02A61L29/14A61L31/022A61L31/14A61L2400/16A61L2430/02A61L2430/12A61L2430/24C22C16/00C22C30/00C22C30/04C22F1/186G02C5/008
Inventor 宫崎修一金熙荣佐藤阳祐
Owner UNIV OF TSUKUBA
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