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US 10,532,134 B2Granted
Thixotropic processing of magnesium composites with a nanoparticles-haloed grain structure for biomedical implant applications
AssigneeDrexel University
InventorsGongyao Zhou, Haibo Gong, Donggang Yao
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Abstract
In described embodiments, the present invention includes a magnesium-based composite material formed from a plurality of α-phase magnesium grains; and a β-alloy phase comprising magnesium and nano-diamond and/or and phosphate containing nanoparticles, the β-alloy phase surrounding each of the plurality of magnesium grains. A method of manufacturing a composite material is also disclosed.
Claims7
A magnesium-based composite medical implant comprising:
- a crystalline structure of α-phase magnesium grains;
- and a β-alloy phase comprising magnesium and a combination of functionalized nano-diamond particles and calcium phosphate nanoparticles, wherein the β-alloy phase forms a halo around each of the α-phase magnesium grains.
A magnesium-based composite medical implant formed by a process comprising the steps of:
- providing magnesium in a thixotropic mixer;
- heating the magnesium above the magnesium α-phase temperature, thereby obtaining a fully molten liquid;
- lowering the temperature of the fully molten liquid below the magnesium α-phase temperature, but above the magnesium β-alloy phase temperature to form a melt;
- mixing the melt to obtain a slurry comprising solid α-phase magnesium grains suspended in a magnesium β-alloy phase;
- adding functionalized diamond and calcium phosphate nanoparticles to the slurry;
- and
- mixing the nanoparticle-added slurry in a mixer to form a mixture;
- and
- discharging the mixture from the mixer,
- wherein the β-alloy phase forms a halo around each of the α-phase magnesium grains wherein the α-phase magnesium grains are formed in a crystalline structure.
7 more elements
A magnesium-based composite medical implant comprising:
- a crystalline structure of α-phase magnesium grains;
- and a β-alloy phase consisting essentially of magnesium and a combination of functionalized nano-diamond particles and calcium phosphate nanoparticles, wherein the β-alloy phase forms a halo around each of the α-phase magnesium grains.
Dependencies are inferred from the claim text.