Mechanochemical Synthesis of Chromium Borides.

An investigation on the formation mechanism of nano CrB2 powder in the Mg–B2O3–Cr2O3 system

“…Fig. 2 shows the XRD patterns of stoichiometric powder mixture compositions mechanically alloyed for 2, 2.5 and 4 h. The diffraction pattern of the sample milled for 2 h shows all the precursor material peaks (Mg and Cr 2 O 3 ) except for B 2 O 3 due to the transformation of crystal state into amorphous state, in agreement with our previous researches [18][19][20][21]. The peaks of starting materials are not found in the 2.5 h-milled sample.…”

“…An increase in the kinetics of reactions during high energy milling can be a result of microstructural refinement, repeated cold deformation and fracture of particles [16,17]. Iizumi et al [18] has prepared CrB 2 after 10-40 h milling using chromium and amorphous boron elemental powder mixtures at atomic ratios of 1:1 and 1:2. We have so far applied the mechanochemical technique to the synthesis of carbides and/or borides of Mo, Ti, and B [19][20][21].…”

Densification and mechanical properties of CrB2+MoSi2 based novel composites

“…These excellent properties make it as a candidate material for high temperature structural applications and hard coatings on cutting tools [3,6]. As an additive, CrB 2 has been proven to improve the properties of high performance materials like borides and carbides [7,8].…”

“…However, the widespread application of monolithic CrB 2 is limited due to the difficulties associated with the high temperature sintering process. Previous literatures on chromium diboride are focused mainly on the synthesis of CrB 2 , single crystal development and thin film deposition [3,6,9,10]. But literature on densification of CrB 2 is rather limited [2,9].…”

Reduction–boronation route to chromium boride (CrB) nanorods

“…So it has found applications in structure materials. The literatures [11,12] reported on the synthesis of CrB crystals above the temperature of 900°C.…”