MECHANOSYNTHESIS OF NANODISPERSED TITANIUM DIBORIDE

作者：Saviak M P^*; Mel'nik A B; Solonin Yu M; Kotko A V; Timofeeva I I; Uvarova I V

来源：Powder Metallurgy and Metal Ceramics, 2015, 53(9-10): 497-504.

DOI：10.1007/s11106-015-9643-5

• mechanosynthesis
• titanium diboride
• structural transformation
• nanostructure

Structural and morphological changes of titanium during intensive milling of titanium and boron powder mixtures in an AIR-015M planetary-ball mill are investigated. It is shown that the structural transformations in titanium lead to the formation of cluster precipitates (like Guinier-Preston zones) of titanium and boron atoms that are regularly oriented with respect to the titanium lattice and coherently associated with it. Cluster precipitates are very effective nuclei for the further reaction and provide an explosive transition to the almost single-phase titanium diboride. It was found that, in the investigated mechanosynthesis conditions, nanostructured titanium diboride forms in the form of flat and spatial polycrystalline particles, composed of oriented nanograins no larger than 20 nm.

• 出版日期2015-1