A graphene modifying method of metal having following steps of providing metal powders, graphene powders and a binder, the metal powder has metal particles, and the graphene powder has graphene micro pieces, each graphene micro piece is formed by graphene molecules connected with each other, each graphene molecule is connected to a stearic acid functional group by a sp3 bond; mixing the metal powder, the graphene powder and the binder to generate heat by a friction, each sp3 bond connected with the stearic acid functional group is thereby heated and broken, each graphene molecule is connected with other graphene molecules via the broken sp3 bond, and the metal particles are thereby wrapped by the graphene molecules; and sintering the metal particles into a metal body to transform the graphene molecules into a three-dimensional mash embedded in the metal body.

A multi-scale and multi-phase dispersion strengthened iron-based alloy, and preparation and characterization methods thereof are provided. The alloy contains a matrix and a strengthening phase. The strengthening phase includes at least two types of the strengthening phase particles with different sizes. A volume of the two types of the strengthening phase particles with different sizes having a particle size less than or equal to 50 nm accounts for 85-95% of a total volume of all the strengthening phase particles. The matrix is a Fe—Cr—W—Ti alloy. The strengthening phases include crystalline Y.sub.2O.sub.3 phase, Y—Ti—O phase, Y—Cr—O phase, and Y—W—O phase. The characterization method comprises electrolytically separating the strengthening phases in the alloy, and then characterizing by using an electron microscope. The tensile strength of the prepared alloy is more than 1600 MPa at room temperature, and is more than 600 MPa at 700° C.

The invention relates to a stabilized lithium metal powder and to a method for producing the same, the stabilized, pure lithium metal powder having been passivated in an organic inert solvent under dispersal conditions with fatty acids or fatty acid esters according to the general formula (I) R—COOR′, in which R stands for C.sub.10-C.sub.29 groups and R′ for H or C.sub.1-C.sub.8 groups.

The invention relates to a stabilized lithium metal powder and to a method for producing the same, the stabilized, pure lithium metal powder having been passivated in an organic inert solvent under dispersal conditions with fatty acids or fatty acid esters according to the general formula (I) R—COOR′, in which R stands for C.sub.10-C.sub.29 groups and R′ for H or C.sub.1-C.sub.8 groups.

A system is provided for use with a volume of metal particles suspended in electroplating solution. The system includes: a positional tip operable to have a positive electrical bias; a dispenser operable to dispense at least one of the metal particles and the electroplating solution; a metal base depositing system operable to deposit a metal base; a controller operable to control the positional tip to move and to control the dispenser to dispense the at least one of the metal particles and the electroplating solution; and a voltage controller operable to provide the positive electrical bias to the positional tip and to provide a negative electrical bias to the metal base so as to electroplate metal onto the metal base from the particles suspended in the electroplating solution and so as to three-dimensionally print a metal shape.

A system is provided for use with a volume of metal particles suspended in electroplating solution. The system includes: a positional tip operable to have a positive electrical bias; a dispenser operable to dispense at least one of the metal particles and the electroplating solution; a metal base depositing system operable to deposit a metal base; a controller operable to control the positional tip to move and to control the dispenser to dispense the at least one of the metal particles and the electroplating solution; and a voltage controller operable to provide the positive electrical bias to the positional tip and to provide a negative electrical bias to the metal base so as to electroplate metal onto the metal base from the particles suspended in the electroplating solution and so as to three-dimensionally print a metal shape.

A process of forming an oxide dispersion strengthened alloy, comprises distributing an alloy powder on a platform; applying a uniform nanometer-scale metal oxide onto the alloy powder; applying an energy beam onto the alloy powder and the uniform nanometer-scale metal oxide; and forming an oxide dispersion strengthened alloy.

An nitrogen solid solution titanium sintered compact includes a matrix made of a titanium component having an -phase, nitrogen atoms dissolved as a solute of solid solution in a crystal lattice of the titanium component, and metal atoms dissolved as a solute of solid solution in the crystal lattice of the titanium component.

The present invention pertains to a process for preparing particles of rare earth sulfide comprising the steps of:preparing a reaction mixture comprising at least one compound comprising at least one rare earth element (A) and at least one alkali metal sulfide (B),submitting said reaction mixture to a mechanical stress so as to cause a chemical reaction that produces the particles of rare earth sulfide.

The present invention pertains to a process for preparing particles of rare earth sulfide comprising the steps of:preparing a reaction mixture comprising at least one compound comprising at least one rare earth element (A) and at least one alkali metal sulfide (B),submitting said reaction mixture to a mechanical stress so as to cause a chemical reaction that produces the particles of rare earth sulfide.