MAGNESIUM ALLOY WITH ADJUSTABLE DEGRADATION RATE
Patent Information
- Authority / Receiving Office
- DE · DE
- Patent Type
- Patents
- Current Assignee / Owner
- DEPUY SYNTHES PROD INC
- Filing Date
- 2014-03-11
- Publication Date
- 2026-06-17
AI Technical Summary
Existing magnesium alloys for medical implants suffer from non-homogeneous degradation, mechanical anisotropy, and limited mechanical properties, with impurities leading to localized corrosion and gas bubble formation, necessitating a need for alloys with controlled and uniform degradation rates and improved mechanical strength.
A Mg matrix alloy composition with controlled impurity levels and nanosized precipitates, specifically (Mg,Zn)2Ca and optionally Mg6Zn3Ca2, is developed, ensuring a homogeneous degradation profile and enhanced mechanical properties through precise control of grain size and precipitate formation.
The alloy achieves a uniform degradation rate of less than 0.5 mg/cm²/day, high yield strength of at least 180 MPa, and improved mechanical properties, reducing mechanical anisotropy and localized corrosion, suitable for various medical implants.