Mechanically driven syntheses of carbides and silcides

Nanostructure and Phases Formation under Mechanical Alloying of Bynary Powder Mixtures of Fe and sp-Element (M); M = C,B,Al,Si,Ge,Sn

“…The estimates of the Am(Fe-C) phase amount showed [5][6][7][8] that it formed in the interfaces of the α-Fe nanostructure. The given SSRs types with x ≥ 17 agree with the data published earlier in [12,18,19] but they differ from the results of [17,20] in which alongside with cementite hexagonal carbides were found and from [21,22] in which only cementite as the first MA stage was found to be formed. Controversial results were obtained for a single-stage process of MA as well with x < 17 at.% C: Hexagonal carbides [17], interstitial solid solution of [23] and amorphous Fe-C phase [7,8,11].…”

Synergism of mechanical milling and dielectric barrier discharge plasma on the fabrication of nano-powders of pure metals and tungsten carbide

“…Normally, WC is prepared by reducing WO 3 and carburizing it, which requires very high temperature and long heating time, and can hardly produce nanostructured WC. Many attempts have been made to fabricate nanostructured WC by MA [11,12]. However, very long milling time is generally required and the obtained product is seldom pure WC.…”

Mechanically activated solid-state synthesis of hafnium carbide and hafnium nitride nanoparticles

“…Nanostructured polycrystalline powders of metal carbides are usually synthesized by direct grinding of metallic powders with graphite [13] or with organic compounds like heptane [14] or of powder mixtures containing a metallic oxide, carbon and a strong reducing agent such as Mg, Ca and Al [15]. When a mild reducing agent is used, an additional heat treatment is necessary to produce carbides.…”