Title:
形状記憶及び超弾性の性質を備えたＮｉフリーベータＴｉ合金
Document Type and Number:
Japanese Patent JP7039583
Kind Code:
B2
Abstract:
A group of substantially nickel-free beta-titanium alloys have shape memory and super-elastic properties suitable for, e.g., medical device applications. In particular, the present disclosure provides a titanium-based group of alloys including 16-20 at. % of hafnium, zirconium or a mixture thereof, 8-17 at. % niobium, and 0.25-6 at. % tin. This alloy group exhibits recoverable strains of at least 3.5% after axial, bending or torsional deformation. In some instances, the alloys have a capability to recover of more than 5% deformation strain. Niobium and tin are provided in the alloy to control beta phase stability, which enhances the ability of the materials to exhibit shape memory or super-elastic properties at a desired application temperature (e.g., body temperature). Hafnium and/or zirconium may be interchangeably added to increase the radiopacity of the material, and also contribute to the superelasticity of the material.
Inventors:
Kai, Song
Shafer, Jeremy E.
Griebel, Adam Jay.
Shafer, Jeremy E.
Griebel, Adam Jay.
Application Number:
JP2019524054A
Publication Date:
March 22, 2022
Filing Date:
November 14, 2016
Export Citation:
Assignee:
Fort Wayne Metals Research Products Corporation
International Classes:
C22C14/00; C22F1/18
Domestic Patent References:
| JP2009097064A | ||||
| JP2007016313A |
Foreign References:
| US20140338795 | ||||
| US20160151610 | ||||
| US5758420 | ||||
| US20130139933 |
Attorney, Agent or Firm:
Kichi Toshio Kawa
Hiroshi Ichikawa
Hiroshi Ichikawa