Analytical investigations in the BC system

New Ternary Compounds Sc3B0.75C3, Sc2B1.1C3.2, ScB15C1.60 and Subsolidus Phase Relations in the Sc–B–C System at 1700°C

“…All these parameters signi"cantly in#uence the unit cell dimensions observed. This rather complex interplay of local disorder and accommodation of small amounts of impurities makes it di$cult to compare literature results since they strongly depend on the method and conditions of synthesis applied (20,24). The overall trend observed in all scienti"c contributions shows an increase of the unit cells' dimension with increasing boron content.…”

Role of inversion symmetry and multipole effects in nonresonant x-ray Raman scattering from icosahedralB4C

“…% (0.06ϽxϽ1.7). 13 Neutron 14 and x-ray [15][16][17][18][19] diffraction studies find a rhombohedral crystal structure ͑see Fig. 1͒ with the unit cell consisting of 15 atoms with 12 atoms at icosahedral sites ͑the B1 and B2 sites in the figure͒ and a linear threeatom chain ͑the B3 and C4 sites in the figure͒ along the threefold diagonal axis of the conventional cell.…”

Comparison of sample preparation methods for determination of free carbon in boron carbide by X-ray powder diffraction

“…1) and determination of the area of the (002) peak of graphite relative to that of the (012) peak of B 4 C, centered at 2θ of ~26.6° and 23.5°, respectively [12,35,36]. The choice of these lines is due to the fact that the Fig.…”

“…By varying the ratio of the exposures of the individual components, it was possible to vary the ratio of the line intensities on the superposition photographs, which is equivalent to varying the concentration of the components in the mixture. Bouchacourt and Thévenot used XRD for determination of free carbon in B 4 C by the generalized method of additions [35]. A successful QXRD method has been reported by Beauvy and Angers [36].…”