Described herein are metal compositions comprising a particles of a transition metal or transition metal oxide, characterized in that the metal composition exhibits a new series with improved qualities relative to a metal composition without the particles of the transition metal or transition metal oxide; and methods of making and testing the same.

A metal matrix composite comprises and/or consists of a uniform distribution of calcined ceramic particles having an average particle size of between 0.30 and 0.900 microns and a metal or alloy uniformly distributed with the ceramic particles and wherein the ceramic particles include oxides of two separate metals selected from the group consisting of Al, Li, Be, Pb, Fe, Ag, Au, Sn, Mg, Ti, Cu, and Zn, and in which said ceramic particles comprise at least 15 volume percent of the metal matrix sintered together and wherein said metal-matrix being machinable with a high speed steel (HSS) bit for greater than about one minute without excessive wear to the bit.

A manufacturing method includes: 1) forming a melt including one or more metals; 2) introducing nanostructures into the melt at an initial volume fraction of the nanostructures; and 3) at least partially evaporating one or more metals from the melt so as to form a metal matrix nanocomposite including the nanostructures dispersed therein at a higher volume fraction than the initial volume fraction.

A metal matrix composite comprises and/or consists of a uniform distribution of calcined ceramic particles having an average particle size of between 0.30 and 0.900 microns and a metal or alloy uniformly distributed with the ceramic particles and wherein the ceramic particles include oxides of two separate metals selected from the group consisting of Al, Li, Be, Pb, Fe, Ag, Au, Sn, Mg, Ti, Cu, and Zn, and in which said ceramic particles comprise at least 15 volume percent of the metal matrix sintered together and wherein said metal-matrix being machinable with a high speed steel (HSS) bit for greater than about one minute without excessive wear to the bit.

A manufacturing method includes: 1) forming a melt including one or more metals; 2) introducing nanostructures into the melt at an initial volume fraction of the nanostructures; and 3) at least partially evaporating one or more metals from the melt so as to form a metal matrix nanocomposite including the nanostructures dispersed therein at a higher volume fraction than the initial volume fraction.

Undercooled liquid metallic core-shell particles, whose core is stable against solidification at ambient conditions, i.e. under near ambient temperature and pressure conditions, are used to join or repair metallic non-particulate components. The undercooled-shell particles in the form of nano-size or micro-size particles comprise an undercooled stable liquid metallic core encapsulated inside an outer shell, which can comprise an oxide or other stabilizer shell typically formed in-situ on the undercooled liquid metallic core. The shell is ruptured to release the liquid phase core material to join or repair a component(s).