Alloys are mixtures of a metal with other elements, the precise combination being governed by the required properties. Alloys are generally considered to be metallic in nature i.e. they have good thermal and electrical conductivities).
Alloys can be manufactured by various routes, the most widely used being to melt the constituents together and to cool the resultant mixture to form a single or multi-phase solid.
Mesh - Mesh is available as either a woven wire or electroformed product; in all cases, the quoted aperture sizes are nominal. Wire mesh: a material which is woven from metal wires to provide a thin grid with a regular series of holes. Electroformed mesh: a product made by electroplating the mesh geometry through a mask onto a substrate which is subsequently etched away.