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

Patent metadata

Field	Value
Publication number	US-9758846-B2
Application number	US-201214342549-A
Country	US
Kind code	B2
Filing date	Aug 28, 2012
Priority date	Sep 5, 2011
Publication date	Sep 12, 2017
Grant date	Sep 12, 2017

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 β phase-stabilizing element capable of stabilizing the β phase of zirconium, and 1-4 mol % inclusive in total of tin and/or aluminum which are ω phase-suppressing elements capable of suppressing the ω phase of zirconium, with the balance consisting of zirconium and inevitable impurities.

First claim

The invention claimed is:

1. A super-elastic zirconium alloy having thermos-elastic martensite transition for living tissues comprising:
titanium within a range of 27 mol %˜54 mol %;
niobium within a range of 5 mol %˜9 mol %, serving as a β phase stabilizing element for stabilizing the β phase of zirconium;
at least one of tin and aluminum within a range of 1 mol %˜4 mol %, serving as a ω phase inhibiting element for inhibiting the ω phase of zirconium;
zirconium, which accounts for the remaining portion; and
inevitable impurities.

2. A medical appliance, made of the super-elastic zirconium alloy for living tissues according to claim 1 .

3. An eyeglasses, having a frame made of the super-elastic zirconium alloy for living tissues according to claim 1 .

4. The super-elastic zirconium alloy for living tissues according to claim 1 , wherein the alloy exhibits a maximum recoverable strain higher than 5.0%.

Assignees

• Miyazaki Shuichi
• Kim Heeyoung
• Sato Yosuke
• Univ Tsukuba

Inventors

• Miyazaki Shuichi
• Kim Heeyoung
• Sato Yosuke

Classifications

• A61L29/14

  Materials characterised by their function or physical properties {, e.g. lubricating compositions} · CPC title

• A61C2201/007

  using shape memory effect · CPC title

• G02C5/008

  Spectacles frames characterized by their material, material structure and material properties · CPC title

• A61L2400/16

  Materials with shape-memory or superelastic properties · CPC title

• A61L2430/12

  for dental implants or prostheses · CPC title