Abstract: The method for doping Mg with Ni includes cold-rolling the Mg material and then cold-spraying with Ni powder, and preferably further cold rolling the Ni-coated Mg to achieve the final Ni-doped Mg material. Preferably the Mg material is cold rolled for about 300 passes and the final Ni-doping concentration is about 5 wt. %.

Abstract: The nanocomposite system for hydrogen storage is a composite of MgH2 powder with ZrNi5 powder and a combination of Nb2O5, TiC and VC. Preferably, the MgH2 is in nanocrystalline form and the ZrNi5 is significantly in a Friauf-Laves phase. The nanocomposite system is formed by combining the MgH2 powder with the ZrNi5, Nb2O5, TiC and VC, preferably in amounts of 4 wt. % ZrNi5+1 wt. % Nb2O5+0.5 wt. % TiC+0.5 wt. % VC, to form a mixture, and then performing reactive ball milling on the mixture. Preferably, the reactive ball milling is performed for a period of 50 hours.

Abstract: A method for synthesis of MgH2/Ni nanocomposites includes balancing magnesium (Mg) powder in a ball milling container with helium (He) gas atmosphere; adding a plurality of nickel (Ni) milling balls to the container; introducing hydrogen (H2) gas to the container to form a MgH2 powder; milling the MgH2 powder using the Ni-balls as milling media to provide MgH2/Ni nanocomposites. The milling can be high-energy ball milling, e.g., under 50 bar of hydrogen gas atmosphere. The high-energy ball milling can be reactive ball milling (RBM). The method can be used to attach Ni to MgH2 powders to enhance the kinetics of hydrogenation/dehydrogenation of MgH2.

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.

Abstract: A method for synthesizing nanodiamonds includes high energy ball milling of graphite powder for a period of at least 52 hours at a rotation speed of about 400 rotations per minute to produce nanodiamonds. The ball milling can occur in an inert atmosphere at ambient pressure and room temperature. The nanodiamonds can have a spherical morphology and a particle size distribution ranging from about 1 nanometer to about 10 nanometers.

Abstract: The composition for hydrogen storage is a composite of MgH2 powder and a metallic glassy Zr70Ni20Pd10 powder. Preferably, the metallic glassy Zr70Ni20Pd10 powder forms about 5 wt % of the composition for hydrogen storage. The composition for hydrogen storage is prepared by mixing MgH2 powder and Zr70Ni20Pd10 powder to form a mixture, and then performing reactive ball milling on the mixture. Preferably, the reactive ball milling is performed under 50 bar of hydrogen gas atmosphere for a period of 50 hours.