System Zirconium-Boron

Structural, anisotropic elastic and thermal properties of MB (M=Ti, Zr and Hf) monoborides

“…Therefore, the shear anisotropic factors A 1 , A 2 , A 3 are calculated and discussed, which are defined as [62]: 13 for the f 1 0 0 f ggplane ð17Þ 23 for the f 0 1 0 f ggplane ð18Þ 12 for the f 0 0 1 f ggplane: ð19Þ…”

“…The unit cell of NaCl-type MB monoboride contains four MB formula units and B atoms occupy 4a-sites at origin while M atoms situate 4b-sites at (1/2, 1/2, 1/2). The NaCl-type structure ZrB is thermal stable in the temperature range 1073-1523 K [13], even at room temperature after slow cooling [17][18][19]. Furthermore, TiB and HfB also crystallize in FeB-type structure with a primitive orthorhombic (Pnma) crystal belonging to the mmm point group [16,20].…”

“…A NaCl-type face-centered cubic (FCC) structure with Fm-3m space group for TiB, ZrB and HfB has been reported [12][13][14][15][16]. The unit cell of NaCl-type MB monoboride contains four MB formula units and B atoms occupy 4a-sites at origin while M atoms situate 4b-sites at (1/2, 1/2, 1/2).…”

Thermodynamic assessment of B–Zr and Si–Zr binary systems

“…A comprehensive investigation conducted by Callmer et al [13] showed a maximum solubility of 2 at.% in ␤-B corresponding to the composition ZrB ∼51 at 2023 K by quantitatively full profile Rietveld refinement of X-ray powder diffraction of the arc melted sample. Glaser and Post [14] found that the ZrB phase of face-centered cubic structure has an extremely narrow range of stability and very rapid quenching is necessary to retain this to room temperature. The recommended temperature range for stabilizing the ZrB phase was from 1523 to 1073 K [14].…”

“…Glaser and Post [14] found that the ZrB phase of face-centered cubic structure has an extremely narrow range of stability and very rapid quenching is necessary to retain this to room temperature. The recommended temperature range for stabilizing the ZrB phase was from 1523 to 1073 K [14]. Although Rudy and Windisch [7] and Portnoi and Romashov [8,9] did not observe this phase in their studies, its existence was confirmed later by Nowotny, Shulishova and Haggerty [15][16][17] respectively.…”