Magnesium alloy
A magnesium alloy having Y, Zn, Ca, Mn, Ag, Ce, Zr, or Si. The alloy is distinguished in that, in the event of suitable treatment, the alloy is convertible into a very fine-grained microstructure, in particular, having grain sizes less than 20 μm. The alloy components are not or are hardly toxicologically relevant.
1. A biodegradable magnesium alloy, consisting of:
Y: 0.5-10 weight-percent,
Zn: 0.5-6 weight-percent,
Ca: 0.05-0.25 weight-percent,
Mn: 0.05-0.5 weight-percent,
Ag: 0-1 weight-percent,
Ce: 0-1 weight-percent,
either Zr: 0-1 weight-percent or Si: 0-0.4 weight-percent, and
Mg: the remainder up to 100 weight-percent
wherein the magnesium alloy has an effective amount of one or more intermetallic phases having a volume amount of greater than about 0 vol. % and less than about 2 vol. % to produce an alloy having a grain size of less than about 20 μm, and
wherein the grain size of the one or more intermetallic phases is less than about 3 μm.
2. The magnesium alloy of claim 1 , wherein the magnesium alloy contains one or more intermetallic phases selected from either group (a), group (b) or from both groups (a) and (b), wherein
group (a) comprises Mg and one or more elements selected from the group consisting of Zn, Ca, Mn, Ag, Ce, Zr, Si, and Y; and
group (b) comprises two or more elements selected from the group consisting of Zn, Ca, Mn, Ag, Ce, Zr, Si, and Y.
3. The magnesium alloy of claim 2 , comprising one or more intermetallic phases selected from the group consisting of Ca 2 Mg 6 Zn 3 , AgMg 4 , Mn 2 Zr, Zn 2 Zr, MgZn 2 , and Mg 24 Y 5 .
4. The magnesium alloy of claim 2 , wherein a grain size of the intermetallic phases is less than about 1 μm.
5. The magnesium alloy of claim 2 , having a ductile yield of A5 standard samples at room temperature of greater than about 20%.
6. The magnesium alloy of claim 2 , wherein
Y is 4-8 weight-percent.
7. The magnesium alloy of claim 2 , wherein
Zn is 0.8-2.5 weight-percent.
8. The magnesium alloy of claim 2 , wherein
Ca is 0.05-0.2 weight-percent.
9. The magnesium alloy of claim 2 , wherein
Mn is 0.05-0.25 weight-percent.
10. The magnesium alloy of claim 2 , wherein
Ag is 0.05-0.6 weight-percent.
11. The magnesium alloy of claim 2 , wherein
Ce is 0-0.5 weight-percent.
12. The magnesium alloy of claim 2 , wherein
Zr is 0.3-0.7 weight-percent.
13. The magnesium alloy of claim 2 , wherein
Si is 0.05-0.25 weight-percent.
14. The magnesium alloy of claim 1 , wherein the volume component of the intermetallic phases of the magnesium alloy is less than about 1 volume-percent.
15. The magnesium alloy of claim 1 , wherein the grain size of the alloy is less than about 10 μm.
16. A biologically nontoxic, biodegradable magnesium alloy consisting of:
Y: 0.5-10 weight-percent,
Zn: 0.5-6 weight-percent,
Ca: 0.05-0.25 weight-percent,
Mn: 0.05-0.5 weight-percent,
Ag: 0-1 weight-percent,
Ce: 0-1 weight-percent,
either Zr: 0-1 weight-percent, or Si: 0-0.4 weight-percent,
wherein the alloy has an average grain size of less than about 20 μm, an intermetallic phase of less than or equal to 2 percent by volume and a ductile yield of A5 standard samples at room temperature of greater than about 20%.
17. The alloy of claim 16 , wherein the alloy has a yield point strength between about 160-190 MPa.
18. The alloy of claim 16 , wherein the alloy has an average grain size of less than about 10 μm.
19. A biodegradable magnesium alloy, consisting essentially of:
Y: 0.5-10 weight-percent,
Zn: 0.5-6 weight-percent,
Ca: 0.05-0.25 weight-percent,
Mn: 0.05-0.5 weight-percent,
Ag: 0-1 weight-percent,
Ce: 0-1 weight-percent,
either Zr: 0-1 weight-percent or Si: 0-0.4 weight-percent, and
Mg: the remainder up to 100 weight-percent
wherein the magnesium alloy has an effective amount of one or more intermetallic phases having a volume amount of greater than about 0 vol. % and less than about 2 vol. % to produce an alloy having a grain size of less than about 20 μm, and
wherein the grain size of the one or more intermetallic phases is less than about 3 μm.
20. The magnesium alloy of claim 19 , wherein a grain size of the intermetallic phases is less than about 1 μm.
21. The magnesium alloy of claim 19 , having a ductile yield of A5 standard samples at room temperature of greater than about 20%.