The structures of eutectic LaB6-(Ti,Zr)B2 alloys were studied following directional crystallization. The eutectic compositions and monovariant equilibrium between two quasibinary eutectics in this system were determined. Varying the TiB2/ZrB2 boride ratio permitted control over their solid solutions, the corresponding cell dimensions and, consequently, the boron-boron distances in the resultant quasibinary borides. A previous assumption, that the perfection of the real structure was determined by differences in the distances between boron atoms in the boron sub-lattices of hexa- and diboride phases, was confirmed. It was shown that forming a regular whisker structure was much easier for complex (Ti,Zr)B2 borides than for individual TiB2 or ZrB2 borides.

Some Peculiarities of Eutectic Crystallization of LaB6-(Ti,Zr)B2 Alloys. Paderno, Y., Paderno, V., Filippov, V.: Journal of Solid State Chemistry, 2000, 154[1], 165-7