Magnesium alloy, method for the production thereof and use thereof
AssigneeBIOTRONIK SE & Co. KG
InventorsHeinz Mueller, Peter Uggowitzer, Joerg Loeffler
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Abstract
A magnesium alloy, implants and method for the production thereof. The magnesium alloy includes 1.5 to 7.0% by weight Zn, 0.5 to 3.5% by weight Al, the remainder being magnesium which contains impurities, which promote electrochemical potential differences and/or the formation of precipitations and/or intermetallic phases, in a total amount of no more than 0.0063% by weight of Fe, Si, Mn, Co, Ni, Cu, Zr, Y, Sc or rare earths having the ordinal numbers 21, 57 to 71 and 89 to 103, Be, Cd, In, Sn and/or Pb as well as P.
Claims19
A biodegradable implant formed from a magnesium alloy, the magnesium alloy comprising:
- 1.5 to 5.5% by weight Zn, 0.5 to 2% by weight Al, the remainder being high-purity vacuum distilled magnesium defining an alloy matrix having solid solutions of Al and/or Zn and intermetallic phases of magnesium and Al in the alloy matrix, the matrix lacking Mn as an alloying element to suppress formation of the ternary intermetallic phase FeMnSi, the magnesium alloy containing a total amount of no more than 0 0063% by weight of impurities selected from the group including Fe, Si, Mn, Co, Ni, Cu, Zr, Y, Sc, lanthanoids, actinoids, Be, Cd, In, Sn, Pb, and P, wherein the alloy content of Zn in % by weight is greater than or equal to the alloy content of Al in % by weight, wherein the magnesium alloy contains precipitations in the form of Mg3Zn3Al2 and MgZn.
Dependencies are inferred from the claim text.