Metallic glassy alloy powders for antibacterial coating
OwnerMohamed Sherif Mohamed Mostafa El-Eskandarany, Ahmed Salem Abdulhadi Aldamier Al-Azmiinventors
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Abstract
The metallic glassy alloy powders for antibacterial coating are mechanically alloyed mixtures of copper, titanium, and nickel nanoparticles. The nanoparticles are alloyed by ball-milling to form glassy, metallic powders. The alloy preferably has a copper:titanium:nickel atomic percentage ratio of about 50:20:30, referred to herein as Cu50Ti20Ni30. The powdered alloy is applied to a suitable substrate, such as stainless steel medical instruments, by cold spray powder coating. The coated substrate exhibits antibacterial properties compared to an uncoated substrate.
Claims8
A method of applying metallic glassy alloy powders to a substrate as an antimicrobial coating, comprising the steps of:
- providing a mechanically alloyed mixture of copper, titanium and nickel, wherein the mechanically alloyed mixture comprises a metallic, glassy powder of amorphous Cu50Ti20Ni30;
- and
- applying a uniform coating of the powder to the substrate by cold spraying.
A method for coating a substrate with metallic glassy powder, comprising the steps of:
- providing a dry substrate having a surface to be coated;
- synthesizing metallic alloy glassy powders, wherein the synthesis includes:
- i) disposing metal powders in a ball-milling container, the ball milling container including a plurality of milling balls and having an inert atmosphere therein;
- ii) disposing the ball-milling container including the metal powders in a ball mill;
- and
- iii) operating the ball mill for a period of time to achieve high-energy collision of the plurality of balls with the metal powders in the container, the high energy collision producing a glassy metallic alloy powder, wherein the alloyed powder comprises amorphous Cu50Ti20Ni30;
- charging the metallic glassy powders in a cold spray feeder;
- and
- spraying the metallic glassy powders on to the surface in a supersonic jet of inert gas at a flow velocity of at least 1200 m/s, thereby coating the surface of the substrate with said metallic glassy powder.
Dependencies are inferred from the claim text.