Mechanochemical synthesis of MoB2 and Mo2B5

Mechanically alloyed Mo–Si–B alloys with a continuous α-Mo matrix and improved mechanical properties

“…2). In contrast to observations made by Kudaka et al [31] who found the formation of MoB 2 during milling of Mo-B powder mixtures with atomic ratios of 1:2 and 2:5 no additional phases could be detected during milling of Mo-8B.…”

“…Mechanical alloying (MA) is well known for allowing the synthesis of materials far from thermodynamic equilibrium such as supersaturated solid solutions or amorphous materials [14][15][16][17][18][19] and of nanocrystalline metals and intermetallic compounds [20][21][22]. The method has been successfully applied to prepare different molybdenum silicides and borides (particularly MoSi 2 ) both by mechanically induced self-propagating reactions during milling or by heat treatment after MA [23][24][25][26][27][28][29][30][31][32]. In Ref.…”

Preparation of molybdenum borides by combustion synthesis involving solid-phase displacement reactions

“…1 [8] reported that the self-sustaining reaction was only achieved in the sample compact with an atomic ratio of Mo:B = 1:1. Kudaka et al [18] obtained single-phase diboride MoB 2 by mechanochemical synthesis through ball milling of the powder mixtures with Mo:B = 1:2 and 2:5. They also reported that Mo 2 B 5 was yielded by annealing the as-milled powder blend composed of Mo:B = 2:5 at temperatures between 1000 and 1500 • C [18].…”

“…Kudaka et al [18] obtained single-phase diboride MoB 2 by mechanochemical synthesis through ball milling of the powder mixtures with Mo:B = 1:2 and 2:5. They also reported that Mo 2 B 5 was yielded by annealing the as-milled powder blend composed of Mo:B = 2:5 at temperatures between 1000 and 1500 • C [18]. In addition, molybdenum borides are often studied in the Mo-Si-B system [19,20].…”

Nanorods of HfB2 from mechanically-activated HfCl4 and B-based powder mixtures

“…It is, in particular, a way of inducing solid state reactions at room temperature, of alloying elements with different melting points and of activating solids allowing, thus, reactions to take place at temperatures lower than usual. This technique was soon widely used to synthesize metal diborides, notably TiB 2 and ZrB 2 : -by high energy ball-milling of elemental powder mixtures followed or not followed by annealing treatments [12][13][14][15][16][17][18][19][20][21].…”